On 06/05/2014 08:59 AM, Stuart Longland wrote:
Hi all,
I'm looking into other ways I can boost the performance of RBD devices
on the cluster here and I happened to see these settings:
http://ceph.com/docs/next/rbd/rbd-config-ref/
A query, is it possible for the cache mentioned there to be paged out to
swap residing on a SSD or is it purely RAM-only?
I see mention of cache-tiers, but these will be at the wrong end of the
Ethernet cable for my usage: I want the cache on the Ceph clients
themselves not back at the OSDs.
So you want this to serve as a read cache as well?
The librbd cache is mainly used as a write-cache for small writes, it's
not indented to be a large read cache.
Regards,
--
Wido den Hollander
42on B.V.
Phone: +31 (0)20 700 9902
Skype: contact42on
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