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author | John Wilkins <john.wilkins@inktank.com> | 2013-05-16 13:56:06 -0700 |
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committer | John Wilkins <john.wilkins@inktank.com> | 2013-05-16 13:56:06 -0700 |
commit | 46f5f585de478017fb763a545b6a137af2dbd64d (patch) | |
tree | 088fd8cf94c64de8eee338d932ce42e7630df9b9 /doc | |
parent | 2df6e37641ac079d2df5e843487f7b738cf37b8e (diff) | |
download | ceph-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.rst | 20 |
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. + + + + + + +=
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