From 9dd15e9356c2fb32b73168b43ca2cb7d3263103f Mon Sep 17 00:00:00 2001 From: Pranith Kumar K Date: Fri, 26 May 2017 15:30:49 +0530 Subject: Update release notes of 3.11 for halo replication Updates: #199 Change-Id: I834543d7e71d9c3d84b595f7446a3e2c74f07d97 Signed-off-by: Pranith Kumar K Reviewed-on: https://review.gluster.org/17396 Smoke: Gluster Build System CentOS-regression: Gluster Build System NetBSD-regression: NetBSD Build System Reviewed-by: Shyamsundar Ranganathan --- doc/release-notes/3.11.0.md | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) (limited to 'doc') diff --git a/doc/release-notes/3.11.0.md b/doc/release-notes/3.11.0.md index 576a7f51565..2811d06ee46 100644 --- a/doc/release-notes/3.11.0.md +++ b/doc/release-notes/3.11.0.md @@ -136,10 +136,38 @@ None. ### Halo Replication feature in AFR has been introduced *Notes for users:* +Halo Geo-replication is a feature which allows Gluster or NFS clients to write +locally to their region (as defined by a latency "halo" or threshold if you +like), and have their writes asynchronously propagate from their origin to the +rest of the cluster. Clients can also write synchronously to the cluster +simply by specifying a halo-latency which is very large (e.g. 10seconds) which +will include all bricks. +To enable halo feature execute the following commands: +```bash +# gluster volume set cluster.halo-enabled yes +``` + +You may have to set the following following options to change defaults. +`cluster.halo-shd-latency`: The threshold below which self-heal daemons will +consider children (bricks) connected. + +`cluster.halo-nfsd-latency`: The threshold below which NFS daemons will consider +children (bricks) connected. + +`cluster.halo-latency`: The threshold below which all other clients will +consider children (bricks) connected. + +`cluster.halo-min-replicas`: The minimum number of replicas which are to +be enforced regardless of latency specified in the above 3 options. +If the number of children falls below this threshold the next +best (chosen by latency) shall be swapped in. + *Limitations:* +None *Known Issues:* +None ### FALLOCATE support with EC Notes for users: -- cgit