From: Sage Weil <sage@newdream.net>
Date: Tue, 6 Oct 2009 18:31:10 +0000 (-0700)
Subject: ceph: OSD client
X-Git-Tag: v2.6.34-rc2~9^2~194
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f24e9980eb860d8600cbe5ef3d2fd9295320d229;p=pandora-kernel.git

ceph: OSD client

The OSD client is responsible for reading and writing data from/to the
object storage pool.  This includes determining where objects are
stored in the cluster, and ensuring that requests are retried or
redirected in the event of a node failure or data migration.

If an OSD does not respond before a timeout expires, keepalive
messages are sent across the lossless, ordered communications channel
to ensure that any break in the TCP is discovered.  If the session
does reset, a reconnection is attempted and affected requests are
resent (by the message transport layer).

Signed-off-by: Sage Weil <sage@newdream.net>
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