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authorJohn Wilkins <john.wilkins@inktank.com>2013-05-16 13:56:06 -0700
committerJohn Wilkins <john.wilkins@inktank.com>2013-05-16 13:56:06 -0700
commit46f5f585de478017fb763a545b6a137af2dbd64d (patch)
tree088fd8cf94c64de8eee338d932ce42e7630df9b9 /doc
parent2df6e37641ac079d2df5e843487f7b738cf37b8e (diff)
downloadceph-46f5f585de478017fb763a545b6a137af2dbd64d.tar.gz
doc: Added latency comment.
Signed-off-by: John Wilkins <john.wilkins@inktank.com>
Diffstat (limited to 'doc')
-rw-r--r--doc/rados/troubleshooting/troubleshooting-mon.rst20
1 files changed, 20 insertions, 0 deletions
diff --git a/doc/rados/troubleshooting/troubleshooting-mon.rst b/doc/rados/troubleshooting/troubleshooting-mon.rst
index 3c3809087ae..04e3a9689fb 100644
--- a/doc/rados/troubleshooting/troubleshooting-mon.rst
+++ b/doc/rados/troubleshooting/troubleshooting-mon.rst
@@ -2,6 +2,8 @@
Recovering from Monitor Failures
==================================
+.. index:: monitor, high availability
+
In production clusters, we recommend running the cluster with a minimum
of three monitors. The failure of a single monitor should not take down
the entire monitor cluster, provided a majority of the monitors remain
@@ -50,3 +52,21 @@ that clients can access the ports associated with your Ceph monitors (i.e., port
iptables -A INPUT -m multiport -p tcp -s {ip-address}/{netmask} --dports 6789,6800:6810 -j ACCEPT
+
+Latency with Down Monitors
+==========================
+
+When you have a monitor that is down, you may experience some latency as
+clients will try to connect to a monitor in the configuration even though
+it is down. If the client fails to connect to the monitor within a timeout
+window, the client will try another monitor in the cluster.
+
+You can also specify the ``-m`` option to point to a monitor that is up
+and in the quorum to avoid latency.
+
+
+
+
+
+
+= \ No newline at end of file