caleb-brown/redict
1
0
Fork 0
mirror of https://codeberg.org/redict/redict.git synced 2025-01-22 08:08:53 -05:00
Code Issues Actions Packages Projects Releases Wiki Activity

Cluster: clusterHandleSlaveFailover() stub.

Browse Source
This commit is contained in:
antirez 2013-03-13 13:10:49 +01:00
parent 1902a9c532
commit 575cbc9990
2 changed files with 31 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
src/cluster.c
View File

@ -227,6 +227,8 @@ void clusterInit(void) {
server.cluster->size = 1;
server.cluster->nodes = dictCreate(&clusterNodesDictType,NULL);
server.cluster->node_timeout = 15;
server.cluster->failover_auth_time = 0;
server.cluster->failover_auth_count = 0;
memset(server.cluster->migrating_slots_to,0,
sizeof(server.cluster->migrating_slots_to));
memset(server.cluster->importing_slots_from,0,
@ -1256,6 +1258,33 @@ void clusterPropagatePublish(robj *channel, robj *message) {
* 4) Perform the failover informing all the other nodes.
*/
void clusterHandleSlaveFailover(void) {
time_t data_age = server.unixtime - server.repl_down_since;
time_t auth_age = server.unixtime - server.cluster->failover_auth_time;
int needed_quorum = (server.cluster->size / 2) + 1;
/* Check if our data is recent enough. For now we just use a fixed
* constant of ten times the node timeout since the cluster should
* react much faster to a master down. */
if (data_age > server.cluster->node_timeout * 10) return;
/* TODO: check if we are the first slave as well? Or just rely on the
* master authorization? */
/* Ask masters if we are authorized to perform the failover. If there
* is a pending auth request that's too old, reset it. */
if (server.cluster->failover_auth_time == 0 || auth_age > 15) {
server.cluster->failover_auth_time = time(NULL);
server.cluster->failover_auth_count = 0;
/* TODO: Broadcast the AUTH request. */
return; /* Wait for replies. */
}
/* Check if we reached the quorum. */
if (server.cluster->failover_auth_count > needed_quorum) {
/* TODO: Perform election. */
/* TODO: Broadcast update to cluster. */
}
}
/* -----------------------------------------------------------------------------

2
src/redis.h
View File

@ -579,6 +579,8 @@ typedef struct {
clusterNode *importing_slots_from[REDIS_CLUSTER_SLOTS];
clusterNode *slots[REDIS_CLUSTER_SLOTS];
zskiplist *slots_to_keys;
int failover_auth_time; /* Time at which we sent the AUTH request. */
int failover_auth_count; /* Number of authorizations received. */
} clusterState;
/* Redis cluster messages header */