mirror of
https://github.com/fluencelabs/redis
synced 2025-03-18 00:20:50 +00:00
log rebuilding, random refactoring, work in progress please wait for an OK commit before to use this version
This commit is contained in:
antirez
parent
210e29f7d2
commit
9d65a1bbae
4
TODO
4
TODO
@ -12,6 +12,9 @@ Most of the features already implemented for this release. The following is a li
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* Append only mode: testing and a command to rebuild the log from scratch.
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* ZRANGEBYSCORE test, ZRANGEBYSCORE LIMIT option.
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* Sorted sets infinity tests.
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* Instead to do the lamest thing of using getDecodedObject only if the encoding
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of the object != REDIS_ENCODING_RAW, hack getDecodedObject in order to just
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increment the reference count if the object is already RAW-encoded.
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VERSION 1.2 TODO (Hash type)
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============================
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@ -50,3 +53,4 @@ SHORT/LONG TERM RANDOM TODO ITEMS
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* Replication automated tests
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* BYTEDARRAY type
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* zmalloc() should avoid to add a private header for archs where there is some other kind of libc-specific way to get the size of a malloced block.
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* Read-only mode.
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@ -115,6 +115,8 @@ static struct redisCommand cmdTable[] = {
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{"echo",2,REDIS_CMD_BULK},
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{"save",1,REDIS_CMD_INLINE},
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{"bgsave",1,REDIS_CMD_INLINE},
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{"rewriteaof",1,REDIS_CMD_INLINE},
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{"bgrewriteaof",1,REDIS_CMD_INLINE},
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{"shutdown",1,REDIS_CMD_INLINE},
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{"lastsave",1,REDIS_CMD_INLINE},
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{"type",2,REDIS_CMD_INLINE},
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488
redis.c
488
redis.c
@ -275,8 +275,9 @@ struct redisServer {
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int appendfd;
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int appendseldb;
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char *pidfile;
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int bgsaveinprogress;
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pid_t bgsavechildpid;
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pid_t bgrewritechildpid;
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sds bgrewritebuf; /* buffer taken by parent during oppend only rewrite */
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struct saveparam *saveparams;
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int saveparamslen;
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char *logfile;
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@ -383,7 +384,7 @@ static void feedAppendOnlyFile(struct redisCommand *cmd, int dictid, robj **argv
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static int syncWithMaster(void);
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static robj *tryObjectSharing(robj *o);
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static int tryObjectEncoding(robj *o);
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static robj *getDecodedObject(const robj *o);
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static robj *getDecodedObject(robj *o);
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static int removeExpire(redisDb *db, robj *key);
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static int expireIfNeeded(redisDb *db, robj *key);
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static int deleteIfVolatile(redisDb *db, robj *key);
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@ -395,6 +396,7 @@ static void freeMemoryIfNeeded(void);
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static int processCommand(redisClient *c);
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static void setupSigSegvAction(void);
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static void rdbRemoveTempFile(pid_t childpid);
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static void aofRemoveTempFile(pid_t childpid);
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static size_t stringObjectLen(robj *o);
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static void processInputBuffer(redisClient *c);
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static zskiplist *zslCreate(void);
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@ -421,6 +423,7 @@ static void dbsizeCommand(redisClient *c);
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static void lastsaveCommand(redisClient *c);
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static void saveCommand(redisClient *c);
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static void bgsaveCommand(redisClient *c);
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static void bgrewriteaofCommand(redisClient *c);
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static void shutdownCommand(redisClient *c);
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static void moveCommand(redisClient *c);
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static void renameCommand(redisClient *c);
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@ -541,6 +544,7 @@ static struct redisCommand cmdTable[] = {
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{"echo",echoCommand,2,REDIS_CMD_BULK},
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{"save",saveCommand,1,REDIS_CMD_INLINE},
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{"bgsave",bgsaveCommand,1,REDIS_CMD_INLINE},
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{"bgrewriteaof",bgrewriteaofCommand,1,REDIS_CMD_INLINE},
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{"shutdown",shutdownCommand,1,REDIS_CMD_INLINE},
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{"lastsave",lastsaveCommand,1,REDIS_CMD_INLINE},
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{"type",typeCommand,2,REDIS_CMD_INLINE},
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@ -752,37 +756,24 @@ static unsigned int dictObjHash(const void *key) {
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static int dictEncObjKeyCompare(void *privdata, const void *key1,
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const void *key2)
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{
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const robj *o1 = key1, *o2 = key2;
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robj *o1 = (robj*) key1, *o2 = (robj*) key2;
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int cmp;
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if (o1->encoding == REDIS_ENCODING_RAW &&
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o2->encoding == REDIS_ENCODING_RAW)
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return sdsDictKeyCompare(privdata,o1->ptr,o2->ptr);
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else {
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robj *dec1, *dec2;
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int cmp;
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dec1 = o1->encoding != REDIS_ENCODING_RAW ?
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getDecodedObject(o1) : (robj*)o1;
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dec2 = o2->encoding != REDIS_ENCODING_RAW ?
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getDecodedObject(o2) : (robj*)o2;
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cmp = sdsDictKeyCompare(privdata,dec1->ptr,dec2->ptr);
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if (dec1 != o1) decrRefCount(dec1);
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if (dec2 != o2) decrRefCount(dec2);
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return cmp;
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}
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o1 = getDecodedObject(o1);
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o2 = getDecodedObject(o2);
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cmp = sdsDictKeyCompare(privdata,o1->ptr,o2->ptr);
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decrRefCount(o1);
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decrRefCount(o2);
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return cmp;
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}
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static unsigned int dictEncObjHash(const void *key) {
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const robj *o = key;
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robj *o = (robj*) key;
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if (o->encoding == REDIS_ENCODING_RAW)
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return dictGenHashFunction(o->ptr, sdslen((sds)o->ptr));
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else {
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robj *dec = getDecodedObject(o);
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unsigned int hash = dictGenHashFunction(dec->ptr, sdslen((sds)dec->ptr));
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decrRefCount(dec);
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return hash;
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}
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o = getDecodedObject(o);
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unsigned int hash = dictGenHashFunction(o->ptr, sdslen((sds)o->ptr));
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decrRefCount(o);
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return hash;
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}
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static dictType setDictType = {
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@ -869,6 +860,89 @@ static void tryResizeHashTables(void) {
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}
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}
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/* A background saving child (BGSAVE) terminated its work. Handle this. */
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void backgroundSaveDoneHandler(int statloc) {
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int exitcode = WEXITSTATUS(statloc);
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int bysignal = WIFSIGNALED(statloc);
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if (!bysignal && exitcode == 0) {
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redisLog(REDIS_NOTICE,
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"Background saving terminated with success");
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server.dirty = 0;
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server.lastsave = time(NULL);
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} else if (!bysignal && exitcode != 0) {
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redisLog(REDIS_WARNING, "Background saving error");
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} else {
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redisLog(REDIS_WARNING,
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"Background saving terminated by signal");
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rdbRemoveTempFile(server.bgsavechildpid);
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}
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server.bgsavechildpid = -1;
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/* Possibly there are slaves waiting for a BGSAVE in order to be served
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* (the first stage of SYNC is a bulk transfer of dump.rdb) */
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updateSlavesWaitingBgsave(exitcode == 0 ? REDIS_OK : REDIS_ERR);
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}
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/* A background append only file rewriting (BGREWRITEAOF) terminated its work.
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* Handle this. */
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void backgroundRewriteDoneHandler(int statloc) {
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int exitcode = WEXITSTATUS(statloc);
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int bysignal = WIFSIGNALED(statloc);
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if (!bysignal && exitcode == 0) {
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int fd;
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char tmpfile[256];
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redisLog(REDIS_NOTICE,
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"Background append only file rewriting terminated with success");
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/* Now it's time to flush the differences accumulated by the parent */
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snprintf(tmpfile,256,"temp-rewriteaof-bg-%d.aof", (int) server.bgrewritechildpid);
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fd = open(tmpfile,O_WRONLY|O_APPEND);
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if (fd == -1) {
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redisLog(REDIS_WARNING, "Not able to open the temp append only file produced by the child: %s", strerror(errno));
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goto cleanup;
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}
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/* Flush our data... */
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if (write(fd,server.bgrewritebuf,sdslen(server.bgrewritebuf)) !=
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(signed) sdslen(server.bgrewritebuf)) {
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redisLog(REDIS_WARNING, "Error or short write trying to flush the parent diff of the append log file in the child temp file: %s", strerror(errno));
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close(fd);
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goto cleanup;
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}
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redisLog(REDIS_WARNING,"Parent diff flushed into the new append log file with success");
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/* Now our work is to rename the temp file into the stable file. And
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* switch the file descriptor used by the server for append only. */
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if (rename(tmpfile,server.appendfilename) == -1) {
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redisLog(REDIS_WARNING,"Can't rename the temp append only file into the stable one: %s", strerror(errno));
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close(fd);
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goto cleanup;
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}
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/* Mission completed... almost */
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redisLog(REDIS_NOTICE,"Append only file successfully rewritten.");
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if (server.appendfd != -1) {
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/* If append only is actually enabled... */
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close(server.appendfd);
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server.appendfd = fd;
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fsync(fd);
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redisLog(REDIS_NOTICE,"The new append only file was selected for future appends.");
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} else {
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/* If append only is disabled we just generate a dump in this
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* format. Why not? */
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close(fd);
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}
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} else if (!bysignal && exitcode != 0) {
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redisLog(REDIS_WARNING, "Background append only file rewriting error");
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} else {
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redisLog(REDIS_WARNING,
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"Background append only file rewriting terminated by signal");
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}
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cleanup:
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sdsfree(server.bgrewritebuf);
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server.bgrewritebuf = sdsempty();
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aofRemoveTempFile(server.bgrewritechildpid);
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server.bgrewritechildpid = -1;
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}
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static int serverCron(struct aeEventLoop *eventLoop, long long id, void *clientData) {
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int j, loops = server.cronloops++;
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REDIS_NOTUSED(eventLoop);
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@ -897,7 +971,7 @@ static int serverCron(struct aeEventLoop *eventLoop, long long id, void *clientD
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* if we resize the HT while there is the saving child at work actually
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* a lot of memory movements in the parent will cause a lot of pages
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* copied. */
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if (!server.bgsaveinprogress) tryResizeHashTables();
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if (server.bgsavechildpid == -1) tryResizeHashTables();
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/* Show information about connected clients */
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if (!(loops % 5)) {
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@ -912,28 +986,17 @@ static int serverCron(struct aeEventLoop *eventLoop, long long id, void *clientD
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if (server.maxidletime && !(loops % 10))
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closeTimedoutClients();
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/* Check if a background saving in progress terminated */
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if (server.bgsaveinprogress) {
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/* Check if a background saving or AOF rewrite in progress terminated */
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if (server.bgsavechildpid != -1 || server.bgrewritechildpid != -1) {
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int statloc;
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if (wait3(&statloc,WNOHANG,NULL)) {
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int exitcode = WEXITSTATUS(statloc);
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int bysignal = WIFSIGNALED(statloc);
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pid_t pid;
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if (!bysignal && exitcode == 0) {
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redisLog(REDIS_NOTICE,
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"Background saving terminated with success");
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server.dirty = 0;
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server.lastsave = time(NULL);
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} else if (!bysignal && exitcode != 0) {
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redisLog(REDIS_WARNING, "Background saving error");
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if ((pid = wait3(&statloc,WNOHANG,NULL)) != 0) {
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if (pid == server.bgsavechildpid) {
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backgroundSaveDoneHandler(statloc);
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} else {
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redisLog(REDIS_WARNING,
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"Background saving terminated by signal");
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rdbRemoveTempFile(server.bgsavechildpid);
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backgroundRewriteDoneHandler(statloc);
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}
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server.bgsaveinprogress = 0;
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server.bgsavechildpid = -1;
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updateSlavesWaitingBgsave(exitcode == 0 ? REDIS_OK : REDIS_ERR);
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}
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} else {
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/* If there is not a background saving in progress check if
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@ -1060,7 +1123,7 @@ static void initServerConfig() {
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server.appendseldb = -1; /* Make sure the first time will not match */
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server.pidfile = "/var/run/redis.pid";
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server.dbfilename = "dump.rdb";
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server.appendfilename = "appendonly.log";
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server.appendfilename = "appendonly.aof";
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server.requirepass = NULL;
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server.shareobjects = 0;
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server.sharingpoolsize = 1024;
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@ -1112,8 +1175,9 @@ static void initServer() {
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server.db[j].id = j;
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}
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server.cronloops = 0;
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server.bgsaveinprogress = 0;
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server.bgsavechildpid = -1;
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server.bgrewritechildpid = -1;
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server.bgrewritebuf = sdsempty();
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server.lastsave = time(NULL);
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server.dirty = 0;
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server.usedmemory = 0;
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@ -1926,12 +1990,7 @@ static void addReply(redisClient *c, robj *obj) {
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c->replstate == REDIS_REPL_ONLINE) &&
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aeCreateFileEvent(server.el, c->fd, AE_WRITABLE,
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sendReplyToClient, c) == AE_ERR) return;
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if (obj->encoding != REDIS_ENCODING_RAW) {
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obj = getDecodedObject(obj);
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} else {
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incrRefCount(obj);
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}
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listAddNodeTail(c->reply,obj);
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listAddNodeTail(c->reply,getDecodedObject(obj));
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}
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static void addReplySds(redisClient *c, sds s) {
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@ -2226,11 +2285,15 @@ static int tryObjectEncoding(robj *o) {
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return REDIS_OK;
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}
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/* Get a decoded version of an encoded object (returned as a new object) */
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static robj *getDecodedObject(const robj *o) {
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/* Get a decoded version of an encoded object (returned as a new object).
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* If the object is already raw-encoded just increment the ref count. */
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static robj *getDecodedObject(robj *o) {
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robj *dec;
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assert(o->encoding != REDIS_ENCODING_RAW);
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if (o->encoding == REDIS_ENCODING_RAW) {
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incrRefCount(o);
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return o;
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}
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if (o->type == REDIS_STRING && o->encoding == REDIS_ENCODING_INT) {
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char buf[32];
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@ -2419,16 +2482,11 @@ static int rdbSaveStringObjectRaw(FILE *fp, robj *obj) {
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/* Like rdbSaveStringObjectRaw() but handle encoded objects */
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static int rdbSaveStringObject(FILE *fp, robj *obj) {
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int retval;
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robj *dec;
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if (obj->encoding != REDIS_ENCODING_RAW) {
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dec = getDecodedObject(obj);
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retval = rdbSaveStringObjectRaw(fp,dec);
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decrRefCount(dec);
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return retval;
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} else {
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return rdbSaveStringObjectRaw(fp,obj);
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}
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obj = getDecodedObject(obj);
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retval = rdbSaveStringObjectRaw(fp,obj);
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decrRefCount(obj);
|
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return retval;
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}
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/* Save a double value. Doubles are saved as strings prefixed by an unsigned
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@ -2584,7 +2642,7 @@ werr:
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static int rdbSaveBackground(char *filename) {
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pid_t childpid;
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|
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if (server.bgsaveinprogress) return REDIS_ERR;
|
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if (server.bgsavechildpid != -1) return REDIS_ERR;
|
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if ((childpid = fork()) == 0) {
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/* Child */
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close(server.fd);
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@ -2601,7 +2659,6 @@ static int rdbSaveBackground(char *filename) {
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return REDIS_ERR;
|
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}
|
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redisLog(REDIS_NOTICE,"Background saving started by pid %d",childpid);
|
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server.bgsaveinprogress = 1;
|
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server.bgsavechildpid = childpid;
|
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return REDIS_OK;
|
||||
}
|
||||
@ -3193,7 +3250,7 @@ static void typeCommand(redisClient *c) {
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}
|
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|
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static void saveCommand(redisClient *c) {
|
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if (server.bgsaveinprogress) {
|
||||
if (server.bgsavechildpid != -1) {
|
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addReplySds(c,sdsnew("-ERR background save in progress\r\n"));
|
||||
return;
|
||||
}
|
||||
@ -3205,7 +3262,7 @@ static void saveCommand(redisClient *c) {
|
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}
|
||||
|
||||
static void bgsaveCommand(redisClient *c) {
|
||||
if (server.bgsaveinprogress) {
|
||||
if (server.bgsavechildpid != -1) {
|
||||
addReplySds(c,sdsnew("-ERR background save already in progress\r\n"));
|
||||
return;
|
||||
}
|
||||
@ -3221,7 +3278,7 @@ static void shutdownCommand(redisClient *c) {
|
||||
/* Kill the saving child if there is a background saving in progress.
|
||||
We want to avoid race conditions, for instance our saving child may
|
||||
overwrite the synchronous saving did by SHUTDOWN. */
|
||||
if (server.bgsaveinprogress) {
|
||||
if (server.bgsavechildpid != -1) {
|
||||
redisLog(REDIS_WARNING,"There is a live saving child. Killing it!");
|
||||
kill(server.bgsavechildpid,SIGKILL);
|
||||
rdbRemoveTempFile(server.bgsavechildpid);
|
||||
@ -4628,15 +4685,9 @@ static robj *lookupKeyByPattern(redisDb *db, robj *pattern, robj *subst) {
|
||||
}
|
||||
|
||||
/* The substitution object may be specially encoded. If so we create
|
||||
* a decoded object on the fly. */
|
||||
if (subst->encoding == REDIS_ENCODING_RAW)
|
||||
/* If we don't need to get a decoded object increment the refcount
|
||||
* so that the final decrRefCount() call will restore the original
|
||||
* count */
|
||||
incrRefCount(subst);
|
||||
else {
|
||||
subst = getDecodedObject(subst);
|
||||
}
|
||||
* a decoded object on the fly. Otherwise getDecodedObject will just
|
||||
* increment the ref count, that we'll decrement later. */
|
||||
subst = getDecodedObject(subst);
|
||||
|
||||
ssub = subst->ptr;
|
||||
if (sdslen(spat)+sdslen(ssub)-1 > REDIS_SORTKEY_MAX) return NULL;
|
||||
@ -4698,20 +4749,13 @@ static int sortCompare(const void *s1, const void *s2) {
|
||||
}
|
||||
} else {
|
||||
/* Compare elements directly */
|
||||
if (so1->obj->encoding == REDIS_ENCODING_RAW &&
|
||||
so2->obj->encoding == REDIS_ENCODING_RAW) {
|
||||
cmp = strcoll(so1->obj->ptr,so2->obj->ptr);
|
||||
} else {
|
||||
robj *dec1, *dec2;
|
||||
robj *dec1, *dec2;
|
||||
|
||||
dec1 = so1->obj->encoding == REDIS_ENCODING_RAW ?
|
||||
so1->obj : getDecodedObject(so1->obj);
|
||||
dec2 = so2->obj->encoding == REDIS_ENCODING_RAW ?
|
||||
so2->obj : getDecodedObject(so2->obj);
|
||||
cmp = strcoll(dec1->ptr,dec2->ptr);
|
||||
if (dec1 != so1->obj) decrRefCount(dec1);
|
||||
if (dec2 != so2->obj) decrRefCount(dec2);
|
||||
}
|
||||
dec1 = getDecodedObject(so1->obj);
|
||||
dec2 = getDecodedObject(so2->obj);
|
||||
cmp = strcoll(dec1->ptr,dec2->ptr);
|
||||
decrRefCount(dec1);
|
||||
decrRefCount(dec2);
|
||||
}
|
||||
}
|
||||
return server.sort_desc ? -cmp : cmp;
|
||||
@ -4830,16 +4874,14 @@ static void sortCommand(redisClient *c) {
|
||||
byval = lookupKeyByPattern(c->db,sortby,vector[j].obj);
|
||||
if (!byval || byval->type != REDIS_STRING) continue;
|
||||
if (alpha) {
|
||||
if (byval->encoding == REDIS_ENCODING_RAW) {
|
||||
vector[j].u.cmpobj = byval;
|
||||
incrRefCount(byval);
|
||||
} else {
|
||||
vector[j].u.cmpobj = getDecodedObject(byval);
|
||||
}
|
||||
vector[j].u.cmpobj = getDecodedObject(byval);
|
||||
} else {
|
||||
if (byval->encoding == REDIS_ENCODING_RAW) {
|
||||
vector[j].u.score = strtod(byval->ptr,NULL);
|
||||
} else {
|
||||
/* Don't need to decode the object if it's
|
||||
* integer-encoded (the only encoding supported) so
|
||||
* far. We can just cast it */
|
||||
if (byval->encoding == REDIS_ENCODING_INT) {
|
||||
vector[j].u.score = (long)byval->ptr;
|
||||
} else
|
||||
@ -4989,7 +5031,7 @@ static void infoCommand(redisClient *c) {
|
||||
listLength(server.slaves),
|
||||
server.usedmemory,
|
||||
server.dirty,
|
||||
server.bgsaveinprogress,
|
||||
server.bgsavechildpid != -1,
|
||||
server.lastsave,
|
||||
server.stat_numconnections,
|
||||
server.stat_numcommands,
|
||||
@ -5014,7 +5056,7 @@ static void infoCommand(redisClient *c) {
|
||||
keys = dictSize(server.db[j].dict);
|
||||
vkeys = dictSize(server.db[j].expires);
|
||||
if (keys || vkeys) {
|
||||
info = sdscatprintf(info, "db%d: keys=%lld,expires=%lld\r\n",
|
||||
info = sdscatprintf(info, "db%d:keys=%lld,expires=%lld\r\n",
|
||||
j, keys, vkeys);
|
||||
}
|
||||
}
|
||||
@ -5217,7 +5259,7 @@ static void syncCommand(redisClient *c) {
|
||||
redisLog(REDIS_NOTICE,"Slave ask for synchronization");
|
||||
/* Here we need to check if there is a background saving operation
|
||||
* in progress, or if it is required to start one */
|
||||
if (server.bgsaveinprogress) {
|
||||
if (server.bgsavechildpid != -1) {
|
||||
/* Ok a background save is in progress. Let's check if it is a good
|
||||
* one for replication, i.e. if there is another slave that is
|
||||
* registering differences since the server forked to save */
|
||||
@ -5584,13 +5626,11 @@ static void feedAppendOnlyFile(struct redisCommand *cmd, int dictid, robj **argv
|
||||
for (j = 0; j < argc; j++) {
|
||||
robj *o = argv[j];
|
||||
|
||||
if (o->encoding != REDIS_ENCODING_RAW)
|
||||
o = getDecodedObject(o);
|
||||
o = getDecodedObject(o);
|
||||
buf = sdscatprintf(buf,"$%d\r\n",sdslen(o->ptr));
|
||||
buf = sdscatlen(buf,o->ptr,sdslen(o->ptr));
|
||||
buf = sdscatlen(buf,"\r\n",2);
|
||||
if (o != argv[j])
|
||||
decrRefCount(o);
|
||||
decrRefCount(o);
|
||||
}
|
||||
|
||||
/* Free the objects from the modified argv for EXPIREAT */
|
||||
@ -5737,6 +5777,238 @@ fmterr:
|
||||
exit(1);
|
||||
}
|
||||
|
||||
/* Write an object into a file in the bulk format $<count>\r\n<payload>\r\n */
|
||||
static int fwriteBulk(FILE *fp, robj *obj) {
|
||||
char buf[128];
|
||||
obj = getDecodedObject(obj);
|
||||
snprintf(buf,sizeof(buf),"$%ld\r\n",(long)sdslen(obj->ptr));
|
||||
if (fwrite(buf,strlen(buf),1,fp) == 0) goto err;
|
||||
if (fwrite(obj->ptr,sdslen(obj->ptr),1,fp) == 0) goto err;
|
||||
if (fwrite("\r\n",2,1,fp) == 0) goto err;
|
||||
decrRefCount(obj);
|
||||
return 1;
|
||||
err:
|
||||
decrRefCount(obj);
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Write a double value in bulk format $<count>\r\n<payload>\r\n */
|
||||
static int fwriteBulkDouble(FILE *fp, double d) {
|
||||
char buf[128], dbuf[128];
|
||||
|
||||
snprintf(dbuf,sizeof(dbuf),"%.17g\r\n",d);
|
||||
snprintf(buf,sizeof(buf),"$%lu\r\n",(unsigned long)strlen(dbuf)-2);
|
||||
if (fwrite(buf,strlen(buf),1,fp) == 0) return 0;
|
||||
if (fwrite(dbuf,strlen(dbuf),1,fp) == 0) return 0;
|
||||
return 1;
|
||||
}
|
||||
|
||||
/* Write a long value in bulk format $<count>\r\n<payload>\r\n */
|
||||
static int fwriteBulkLong(FILE *fp, long l) {
|
||||
char buf[128], lbuf[128];
|
||||
|
||||
snprintf(lbuf,sizeof(lbuf),"%ld\r\n",l);
|
||||
snprintf(buf,sizeof(buf),"$%lu\r\n",(unsigned long)strlen(lbuf)-2);
|
||||
if (fwrite(buf,strlen(buf),1,fp) == 0) return 0;
|
||||
if (fwrite(lbuf,strlen(lbuf),1,fp) == 0) return 0;
|
||||
return 1;
|
||||
}
|
||||
|
||||
/* Write a sequence of commands able to fully rebuild the dataset into
|
||||
* "filename". Used both by REWRITEAOF and BGREWRITEAOF. */
|
||||
static int rewriteAppendOnlyFile(char *filename) {
|
||||
dictIterator *di = NULL;
|
||||
dictEntry *de;
|
||||
FILE *fp;
|
||||
char tmpfile[256];
|
||||
int j;
|
||||
time_t now = time(NULL);
|
||||
|
||||
/* Note that we have to use a different temp name here compared to the
|
||||
* one used by rewriteAppendOnlyFileBackground() function. */
|
||||
snprintf(tmpfile,256,"temp-rewriteaof-%d.aof", (int) getpid());
|
||||
fp = fopen(tmpfile,"w");
|
||||
if (!fp) {
|
||||
redisLog(REDIS_WARNING, "Failed rewriting the append only file: %s", strerror(errno));
|
||||
return REDIS_ERR;
|
||||
}
|
||||
for (j = 0; j < server.dbnum; j++) {
|
||||
char selectcmd[] = "*2\r\n$6\r\nSELECT\r\n";
|
||||
redisDb *db = server.db+j;
|
||||
dict *d = db->dict;
|
||||
if (dictSize(d) == 0) continue;
|
||||
di = dictGetIterator(d);
|
||||
if (!di) {
|
||||
fclose(fp);
|
||||
return REDIS_ERR;
|
||||
}
|
||||
|
||||
/* SELECT the new DB */
|
||||
if (fwrite(selectcmd,sizeof(selectcmd)-1,1,fp) == 0) goto werr;
|
||||
if (fwriteBulkLong(fp,j+1) == 0) goto werr;
|
||||
|
||||
/* Iterate this DB writing every entry */
|
||||
while((de = dictNext(di)) != NULL) {
|
||||
robj *key = dictGetEntryKey(de);
|
||||
robj *o = dictGetEntryVal(de);
|
||||
time_t expiretime = getExpire(db,key);
|
||||
|
||||
/* Save the key and associated value */
|
||||
if (rdbSaveStringObject(fp,key) == -1) goto werr;
|
||||
if (o->type == REDIS_STRING) {
|
||||
/* Emit a SET command */
|
||||
char cmd[]="*3\r\n$3\r\nSET\r\n";
|
||||
if (fwrite(cmd,sizeof(cmd)-1,1,fp) == 0) goto werr;
|
||||
/* Key and value */
|
||||
if (fwriteBulk(fp,key) == 0) goto werr;
|
||||
if (fwriteBulk(fp,o) == 0) goto werr;
|
||||
} else if (o->type == REDIS_LIST) {
|
||||
/* Emit the RPUSHes needed to rebuild the list */
|
||||
list *list = o->ptr;
|
||||
listNode *ln;
|
||||
|
||||
listRewind(list);
|
||||
while((ln = listYield(list))) {
|
||||
char cmd[]="*3\r\n$5\r\nRPUSH\r\n";
|
||||
robj *eleobj = listNodeValue(ln);
|
||||
|
||||
if (fwrite(cmd,sizeof(cmd)-1,1,fp) == 0) goto werr;
|
||||
if (fwriteBulk(fp,key) == 0) goto werr;
|
||||
if (fwriteBulk(fp,eleobj) == 0) goto werr;
|
||||
}
|
||||
} else if (o->type == REDIS_SET) {
|
||||
/* Emit the SADDs needed to rebuild the set */
|
||||
dict *set = o->ptr;
|
||||
dictIterator *di = dictGetIterator(set);
|
||||
dictEntry *de;
|
||||
|
||||
while((de = dictNext(di)) != NULL) {
|
||||
char cmd[]="*3\r\n$4\r\nSADD\r\n";
|
||||
robj *eleobj = dictGetEntryKey(de);
|
||||
|
||||
if (fwrite(cmd,sizeof(cmd)-1,1,fp) == 0) goto werr;
|
||||
if (fwriteBulk(fp,key) == 0) goto werr;
|
||||
if (fwriteBulk(fp,eleobj) == 0) goto werr;
|
||||
}
|
||||
dictReleaseIterator(di);
|
||||
} else if (o->type == REDIS_ZSET) {
|
||||
/* Emit the ZADDs needed to rebuild the sorted set */
|
||||
zset *zs = o->ptr;
|
||||
dictIterator *di = dictGetIterator(zs->dict);
|
||||
dictEntry *de;
|
||||
|
||||
while((de = dictNext(di)) != NULL) {
|
||||
char cmd[]="*4\r\n$4\r\nZADD\r\n";
|
||||
robj *eleobj = dictGetEntryKey(de);
|
||||
double *score = dictGetEntryVal(de);
|
||||
|
||||
if (fwrite(cmd,sizeof(cmd)-1,1,fp) == 0) goto werr;
|
||||
if (fwriteBulk(fp,key) == 0) goto werr;
|
||||
if (fwriteBulkDouble(fp,*score) == 0) goto werr;
|
||||
if (fwriteBulk(fp,eleobj) == 0) goto werr;
|
||||
}
|
||||
dictReleaseIterator(di);
|
||||
} else {
|
||||
assert(0 != 0);
|
||||
}
|
||||
/* Save the expire time */
|
||||
if (expiretime != -1) {
|
||||
char cmd[]="*3\r\n$6\r\nEXPIRE\r\n";
|
||||
/* If this key is already expired skip it */
|
||||
if (expiretime < now) continue;
|
||||
if (fwrite(cmd,sizeof(cmd)-1,1,fp) == 0) goto werr;
|
||||
if (fwriteBulk(fp,key) == 0) goto werr;
|
||||
if (fwriteBulkLong(fp,expiretime) == 0) goto werr;
|
||||
}
|
||||
}
|
||||
dictReleaseIterator(di);
|
||||
}
|
||||
|
||||
/* Make sure data will not remain on the OS's output buffers */
|
||||
fflush(fp);
|
||||
fsync(fileno(fp));
|
||||
fclose(fp);
|
||||
|
||||
/* Use RENAME to make sure the DB file is changed atomically only
|
||||
* if the generate DB file is ok. */
|
||||
if (rename(tmpfile,filename) == -1) {
|
||||
redisLog(REDIS_WARNING,"Error moving temp append only file on the final destination: %s", strerror(errno));
|
||||
unlink(tmpfile);
|
||||
return REDIS_ERR;
|
||||
}
|
||||
redisLog(REDIS_NOTICE,"SYNC append only file rewrite performed");
|
||||
return REDIS_OK;
|
||||
|
||||
werr:
|
||||
fclose(fp);
|
||||
unlink(tmpfile);
|
||||
redisLog(REDIS_WARNING,"Write error writing append only fileon disk: %s", strerror(errno));
|
||||
if (di) dictReleaseIterator(di);
|
||||
return REDIS_ERR;
|
||||
}
|
||||
|
||||
/* This is how rewriting of the append only file in background works:
|
||||
*
|
||||
* 1) The user calls BGREWRITEAOF
|
||||
* 2) Redis calls this function, that forks():
|
||||
* 2a) the child rewrite the append only file in a temp file.
|
||||
* 2b) the parent accumulates differences in server.bgrewritebuf.
|
||||
* 3) When the child finished '2a' exists.
|
||||
* 4) The parent will trap the exit code, if it's OK, will append the
|
||||
* data accumulated into server.bgrewritebuf into the temp file, and
|
||||
* finally will rename(2) the temp file in the actual file name.
|
||||
* The the new file is reopened as the new append only file. Profit!
|
||||
*/
|
||||
static int rewriteAppendOnlyFileBackground(void) {
|
||||
pid_t childpid;
|
||||
|
||||
if (server.bgrewritechildpid != -1) return REDIS_ERR;
|
||||
if ((childpid = fork()) == 0) {
|
||||
/* Child */
|
||||
char tmpfile[256];
|
||||
close(server.fd);
|
||||
|
||||
snprintf(tmpfile,256,"temp-rewriteaof-bg-%d.aof", (int) getpid());
|
||||
if (rewriteAppendOnlyFile(tmpfile) == REDIS_OK) {
|
||||
exit(0);
|
||||
} else {
|
||||
exit(1);
|
||||
}
|
||||
} else {
|
||||
/* Parent */
|
||||
if (childpid == -1) {
|
||||
redisLog(REDIS_WARNING,
|
||||
"Can't rewrite append only file in background: fork: %s",
|
||||
strerror(errno));
|
||||
return REDIS_ERR;
|
||||
}
|
||||
redisLog(REDIS_NOTICE,
|
||||
"Background append only file rewriting started by pid %d",childpid);
|
||||
server.bgrewritechildpid = childpid;
|
||||
return REDIS_OK;
|
||||
}
|
||||
return REDIS_OK; /* unreached */
|
||||
}
|
||||
|
||||
static void bgrewriteaofCommand(redisClient *c) {
|
||||
if (server.bgrewritechildpid != -1) {
|
||||
addReplySds(c,sdsnew("-ERR background append only file rewriting already in progress\r\n"));
|
||||
return;
|
||||
}
|
||||
if (rewriteAppendOnlyFileBackground() == REDIS_OK) {
|
||||
addReply(c,shared.ok);
|
||||
} else {
|
||||
addReply(c,shared.err);
|
||||
}
|
||||
}
|
||||
|
||||
static void aofRemoveTempFile(pid_t childpid) {
|
||||
char tmpfile[256];
|
||||
|
||||
snprintf(tmpfile,256,"temp-rewriteaof-bg-%d.aof", (int) childpid);
|
||||
unlink(tmpfile);
|
||||
}
|
||||
|
||||
/* ================================= Debugging ============================== */
|
||||
|
||||
static void debugCommand(redisClient *c) {
|
||||
@ -5909,7 +6181,7 @@ static void segvHandler(int sig, siginfo_t *info, void *secret) {
|
||||
listLength(server.slaves),
|
||||
server.usedmemory,
|
||||
server.dirty,
|
||||
server.bgsaveinprogress,
|
||||
server.bgsavechildpid != -1,
|
||||
server.lastsave,
|
||||
server.stat_numconnections,
|
||||
server.stat_numcommands,
|
||||
|
||||
@ -2,9 +2,12 @@ static struct redisFunctionSym symsTable[] = {
|
||||
{"acceptHandler",(unsigned long)acceptHandler},
|
||||
{"addReply",(unsigned long)addReply},
|
||||
{"addReplyBulkLen",(unsigned long)addReplyBulkLen},
|
||||
{"addReplyDouble",(unsigned long)addReplyDouble},
|
||||
{"addReplySds",(unsigned long)addReplySds},
|
||||
{"aofRemoveTempFile",(unsigned long)aofRemoveTempFile},
|
||||
{"appendServerSaveParams",(unsigned long)appendServerSaveParams},
|
||||
{"authCommand",(unsigned long)authCommand},
|
||||
{"bgrewriteaofCommand",(unsigned long)bgrewriteaofCommand},
|
||||
{"bgsaveCommand",(unsigned long)bgsaveCommand},
|
||||
{"closeTimedoutClients",(unsigned long)closeTimedoutClients},
|
||||
{"compareStringObjects",(unsigned long)compareStringObjects},
|
||||
@ -49,6 +52,9 @@ static struct redisFunctionSym symsTable[] = {
|
||||
{"freeSetObject",(unsigned long)freeSetObject},
|
||||
{"freeStringObject",(unsigned long)freeStringObject},
|
||||
{"freeZsetObject",(unsigned long)freeZsetObject},
|
||||
{"fwriteBulk",(unsigned long)fwriteBulk},
|
||||
{"fwriteBulkDouble",(unsigned long)fwriteBulkDouble},
|
||||
{"fwriteBulkLong",(unsigned long)fwriteBulkLong},
|
||||
{"getCommand",(unsigned long)getCommand},
|
||||
{"getDecodedObject",(unsigned long)getDecodedObject},
|
||||
{"getExpire",(unsigned long)getExpire},
|
||||
@ -121,7 +127,10 @@ static struct redisFunctionSym symsTable[] = {
|
||||
{"replicationFeedSlaves",(unsigned long)replicationFeedSlaves},
|
||||
{"resetClient",(unsigned long)resetClient},
|
||||
{"resetServerSaveParams",(unsigned long)resetServerSaveParams},
|
||||
{"rewriteAppendOnlyFile",(unsigned long)rewriteAppendOnlyFile},
|
||||
{"rewriteAppendOnlyFileBackground",(unsigned long)rewriteAppendOnlyFileBackground},
|
||||
{"rpopCommand",(unsigned long)rpopCommand},
|
||||
{"rpoplpushcommand",(unsigned long)rpoplpushcommand},
|
||||
{"rpushCommand",(unsigned long)rpushCommand},
|
||||
{"saddCommand",(unsigned long)saddCommand},
|
||||
{"saveCommand",(unsigned long)saveCommand},
|
||||
@ -134,6 +143,7 @@ static struct redisFunctionSym symsTable[] = {
|
||||
{"selectDb",(unsigned long)selectDb},
|
||||
{"sendBulkToSlave",(unsigned long)sendBulkToSlave},
|
||||
{"sendReplyToClient",(unsigned long)sendReplyToClient},
|
||||
{"sendReplyToClientWritev",(unsigned long)sendReplyToClientWritev},
|
||||
{"serverCron",(unsigned long)serverCron},
|
||||
{"setCommand",(unsigned long)setCommand},
|
||||
{"setExpire",(unsigned long)setExpire},
|
||||
@ -169,7 +179,9 @@ static struct redisFunctionSym symsTable[] = {
|
||||
{"updateSlavesWaitingBgsave",(unsigned long)updateSlavesWaitingBgsave},
|
||||
{"yesnotoi",(unsigned long)yesnotoi},
|
||||
{"zaddCommand",(unsigned long)zaddCommand},
|
||||
{"zaddGenericCommand",(unsigned long)zaddGenericCommand},
|
||||
{"zcardCommand",(unsigned long)zcardCommand},
|
||||
{"zincrbyCommand",(unsigned long)zincrbyCommand},
|
||||
{"zrangeCommand",(unsigned long)zrangeCommand},
|
||||
{"zrangeGenericCommand",(unsigned long)zrangeGenericCommand},
|
||||
{"zrangebyscoreCommand",(unsigned long)zrangebyscoreCommand},
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user