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Cluster: clusterCron() freq is now 10h. Still ping 1 node every sec.

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After the change in clusterCron() frequency of call, we still want to
ping just one random node every second.
This commit is contained in:
antirez 2013-10-09 16:29:14 +02:00
parent e5864c73b6
commit 573c2fea91
1 changed files with 22 additions and 15 deletions
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37
src/cluster.c
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@ -1742,6 +1742,9 @@ void clusterCron(void) {
int j, update_state = 0;
mstime_t min_pong = 0, now = mstime();
clusterNode *min_pong_node = NULL;
static unsigned long long iteration = 0;
iteration++; /* Number of times this function was called so far. */
/* Check if we have disconnected nodes and re-establish the connection. */
di = dictGetSafeIterator(server.cluster->nodes);
@ -1798,23 +1801,27 @@ void clusterCron(void) {
}
dictReleaseIterator(di);
/* Ping some random node. Check a few random nodes and ping the one with
* the oldest pong_received time */
for (j = 0; j < 2; j++) {
de = dictGetRandomKey(server.cluster->nodes);
clusterNode *this = dictGetVal(de);
/* Ping some random node 1 time every 10 iterations, so that we usually ping
* one random node every second. */
if (!(iteration % 10)) {
/* Check a few random nodes and ping the one with the oldest
* pong_received time. */
for (j = 0; j < 5; j++) {
de = dictGetRandomKey(server.cluster->nodes);
clusterNode *this = dictGetVal(de);
/* Don't ping nodes disconnected or with a ping currently active. */
if (this->link == NULL || this->ping_sent != 0) continue;
if (this->flags & (REDIS_NODE_MYSELF|REDIS_NODE_HANDSHAKE)) continue;
if (min_pong_node == NULL || min_pong > this->pong_received) {
min_pong_node = this;
min_pong = this->pong_received;
/* Don't ping nodes disconnected or with a ping currently active. */
if (this->link == NULL || this->ping_sent != 0) continue;
if (this->flags & (REDIS_NODE_MYSELF|REDIS_NODE_HANDSHAKE)) continue;
if (min_pong_node == NULL || min_pong > this->pong_received) {
min_pong_node = this;
min_pong = this->pong_received;
}
}
if (min_pong_node) {
redisLog(REDIS_DEBUG,"Pinging node %.40s", min_pong_node->name);
clusterSendPing(min_pong_node->link, CLUSTERMSG_TYPE_PING);
}
}
if (min_pong_node) {
redisLog(REDIS_DEBUG,"Pinging node %.40s", min_pong_node->name);
clusterSendPing(min_pong_node->link, CLUSTERMSG_TYPE_PING);
}
/* Iterate nodes to check if we need to flag something as failing */