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https://github.com/fluencelabs/redis
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Cluster: bulk-accept new nodes connections.
The same change was operated for normal client connections. This is important for Cluster as well, since when a node rejoins the cluster, when a partition heals or after a restart, it gets flooded with new connection attempts by all the other nodes trying to form a full mesh again.
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@ -492,32 +492,38 @@ void freeClusterLink(clusterLink *link) {
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zfree(link);
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}
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#define MAX_CLUSTER_ACCEPTS_PER_CALL 1000
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void clusterAcceptHandler(aeEventLoop *el, int fd, void *privdata, int mask) {
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int cport, cfd;
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int max = MAX_CLUSTER_ACCEPTS_PER_CALL;
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char cip[REDIS_IP_STR_LEN];
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clusterLink *link;
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REDIS_NOTUSED(el);
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REDIS_NOTUSED(mask);
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REDIS_NOTUSED(privdata);
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cfd = anetTcpAccept(server.neterr, fd, cip, sizeof(cip), &cport);
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if (cfd == ANET_ERR) {
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redisLog(REDIS_VERBOSE,"Accepting cluster node: %s", server.neterr);
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return;
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}
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anetNonBlock(NULL,cfd);
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anetEnableTcpNoDelay(NULL,cfd);
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while(max--) {
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cfd = anetTcpAccept(server.neterr, fd, cip, sizeof(cip), &cport);
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if (cfd == ANET_ERR) {
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if (errno != EWOULDBLOCK)
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redisLog(REDIS_VERBOSE,
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"Accepting cluster node: %s", server.neterr);
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return;
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}
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anetNonBlock(NULL,cfd);
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anetEnableTcpNoDelay(NULL,cfd);
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/* Use non-blocking I/O for cluster messages. */
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redisLog(REDIS_VERBOSE,"Accepted cluster node %s:%d", cip, cport);
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/* Create a link object we use to handle the connection.
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* It gets passed to the readable handler when data is available.
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* Initiallly the link->node pointer is set to NULL as we don't know
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* which node is, but the right node is references once we know the
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* node identity. */
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link = createClusterLink(NULL);
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link->fd = cfd;
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aeCreateFileEvent(server.el,cfd,AE_READABLE,clusterReadHandler,link);
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/* Use non-blocking I/O for cluster messages. */
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redisLog(REDIS_VERBOSE,"Accepted cluster node %s:%d", cip, cport);
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/* Create a link object we use to handle the connection.
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* It gets passed to the readable handler when data is available.
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* Initiallly the link->node pointer is set to NULL as we don't know
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* which node is, but the right node is references once we know the
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* node identity. */
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link = createClusterLink(NULL);
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link->fd = cfd;
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aeCreateFileEvent(server.el,cfd,AE_READABLE,clusterReadHandler,link);
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}
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}
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/* -----------------------------------------------------------------------------
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