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Cluster: CLUSTER NODES speedup.

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This commit is contained in:
antirez 2015-03-13 11:26:04 +01:00
parent b2e8eca70d
commit e1b6c9dd18
1 changed files with 32 additions and 16 deletions
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48
src/cluster.c
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@ -3547,28 +3547,30 @@ sds representRedisNodeFlags(sds ci, uint16_t flags) {
/* Generate a csv-alike representation of the specified cluster node.
* See clusterGenNodesDescription() top comment for more information.
*
* The function returns the string representation as an SDS string. */
sds clusterGenNodeDescription(clusterNode *node) {
* The function appends the node representation to the SDS string 'ci' and
* returns it (that may point to a different string as usually with the
* SDS-style API). */
sds clusterGenNodeDescription(sds ci, clusterNode *node) {
int j, start;
sds ci;
/* Node coordinates */
ci = sdscatprintf(sdsempty(),"%.40s %s:%d ",
node->name,
node->ip,
node->port);
ci = sdscatlen(ci,node->name,40);
ci = sdscatfmt(ci," %s:%i ",node->ip,node->port);
/* Flags */
ci = representRedisNodeFlags(ci, node->flags);
/* Slave of... or just "-" */
if (node->slaveof)
ci = sdscatprintf(ci," %.40s ",node->slaveof->name);
else
if (node->slaveof) {
ci = sdscatlen(ci," ",1);
ci = sdscatlen(ci,node->slaveof->name,40);
ci = sdscatlen(ci," ",1);
} else {
ci = sdscatlen(ci," - ",3);
}
/* Latency from the POV of this node, link status */
ci = sdscatprintf(ci,"%lld %lld %llu %s",
ci = sdscatfmt(ci,"%I %I %U %s",
(long long) node->ping_sent,
(long long) node->pong_received,
(unsigned long long) node->configEpoch,
@ -3580,6 +3582,19 @@ sds clusterGenNodeDescription(clusterNode *node) {
for (j = 0; j < REDIS_CLUSTER_SLOTS; j++) {
int bit;
/* It is common for a node to have pretty contiguous slots, so
* optimize this loop by skipping whole 32bit words if they have
* no set bits. We stop to the penultimate word because last word
* has special handling when start != -1 (later in the loop). */
if ((j&31)==0 && j < REDIS_CLUSTER_SLOTS-32) {
uint32_t *slotword = ((uint32_t*)node->slots)+(j/32);
if ((start == -1 && *slotword == 0) ||
(start != -1 && *slotword == UINT32_MAX)) {
j += 32;
continue;
}
}
if ((bit = clusterNodeGetSlotBit(node,j)) != 0) {
if (start == -1) start = j;
}
@ -3625,18 +3640,19 @@ sds clusterGenNodeDescription(clusterNode *node) {
* of the CLUSTER NODES function, and as format for the cluster
* configuration file (nodes.conf) for a given node. */
sds clusterGenNodesDescription(int filter) {
sds ci = sdsempty(), ni;
sds ci = sdsempty();
dictIterator *di;
dictEntry *de;
/* Make room to avoid multiple resizes of the buffer. */
ci = sdsMakeRoomFor(ci,256*dictSize(server.cluster->nodes));
di = dictGetSafeIterator(server.cluster->nodes);
while((de = dictNext(di)) != NULL) {
clusterNode *node = dictGetVal(de);
if (node->flags & filter) continue;
ni = clusterGenNodeDescription(node);
ci = sdscatsds(ci,ni);
sdsfree(ni);
ci = clusterGenNodeDescription(ci,node);
ci = sdscatlen(ci,"\n",1);
}
dictReleaseIterator(di);
@ -4093,7 +4109,7 @@ void clusterCommand(redisClient *c) {
addReplyMultiBulkLen(c,n->numslaves);
for (j = 0; j < n->numslaves; j++) {
sds ni = clusterGenNodeDescription(n->slaves[j]);
sds ni = clusterGenNodeDescription(sdsempty(),n->slaves[j]);
addReplyBulkCString(c,ni);
sdsfree(ni);
}