From: Rutger ter Borg <rutger@terborg.net>
To: ceph-devel@vger.kernel.org
Subject: Rados consistency model
Date: Tue, 18 Dec 2012 09:51:03 +0100 [thread overview]
Message-ID: <kapapl$ud5$1@ger.gmane.org> (raw)
Dear list,
I have a question regarding concurrency guarantees of Rados. Suppose I
have two nodes, say A and B, both running a process, and both using the
same rados storage pool, maybe connected through different OSDs. Suppose
node A updates an object in the storage pool, and after completion
immediately notifies B (through its own messaging layer) that that
specific object has been updated. Then, can I assume that, if B re-reads
that object, it will always get the updated one? If not, what would be
the recommended way of notifying B?
IOW, what kind of consistency model should I assume?
Thanks,
Rutger
next reply other threads:[~2012-12-18 8:51 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-18 8:51 Rutger ter Borg [this message]
2012-12-18 22:22 ` Rados consistency model Samuel Just
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