path: root/rpc/rpc-lib/src
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authorMohammed Rafi KC <>2019-02-25 10:05:32 +0530
committerAmar Tumballi <>2019-04-01 03:44:23 +0000
commitbc3694d7cfc868a2ed6344ea123faf19fce28d13 (patch)
tree51764aa4445462081273444d5ff2499b1e5375f7 /rpc/rpc-lib/src
parent92ae26ae8039847e38c738ef98835a14be9d4296 (diff)
mgmt/shd: Implement multiplexing in self heal daemon
Problem: Shd daemon is per node, which means they create a graph with all volumes on it. While this is a great for utilizing resources, it is so good in terms of performance and managebility. Because self-heal daemons doesn't have capability to automatically reconfigure their graphs. So each time when any configurations changes happens to the volumes(replicate/disperse), we need to restart shd to bring the changes into the graph. Because of this all on going heal for all other volumes has to be stopped in the middle, and need to restart all over again. Solution: This changes makes shd as a per volume daemon, so that the graph will be generated for each volumes. When we want to start/reconfigure shd for a volume, we first search for an existing shd running on the node, if there is none, we will start a new process. If already a daemon is running for shd, then we will simply detach a graph for a volume and reatach the updated graph for the volume. This won't touch any of the on going operations for any other volumes on the shd daemon. Example of an shd graph when it is per volume graph ----------------------- | debug-iostat | ----------------------- / | \ / | \ --------- --------- ---------- | AFR-1 | | AFR-2 | | AFR-3 | -------- --------- ---------- A running shd daemon with 3 volumes will be like--> graph ----------------------- | debug-iostat | ----------------------- / | \ / | \ ------------ ------------ ------------ | volume-1 | | volume-2 | | volume-3 | ------------ ------------ ------------ Change-Id: Idcb2698be3eeb95beaac47125565c93370afbd99 fixes: bz#1659708 Signed-off-by: Mohammed Rafi KC <>
Diffstat (limited to 'rpc/rpc-lib/src')
1 files changed, 2 insertions, 0 deletions
diff --git a/rpc/rpc-lib/src/protocol-common.h b/rpc/rpc-lib/src/protocol-common.h
index 779878f52be..7275d7568b6 100644
--- a/rpc/rpc-lib/src/protocol-common.h
+++ b/rpc/rpc-lib/src/protocol-common.h
@@ -245,6 +245,8 @@ enum glusterd_brick_procnum {