On Wed, 27 Jul 2011, S?awomir Skowron wrote:
> Hello. I have some questions.
>
> 1. Is there any chance to change default 4MB object size to for
> example 1MB or less ??
Yeah. You can use the cephfs to set the default layout on the root
directory, which will apply to any new files. See 'man cephfs'.
> 2. I have create cluster of two mons, and 32 osd (1TB each) on two
> machines. At this radosgw with apache2 for test. When i putting data
> from s3 client to rados, everything is ok, but when one of osd is
> going down all s3 clients going to be freeze for some seconds, before
> ceph sign this osd as down, and then everything is starting working
> again wit degraded osd. How can i tune this marking as a down for ms
> or 0 :) and not for seconds freeze ??
The 'osd heartbeat grace' defualt is 20. Stick something like
osd heartbeat grace = 5
in the [osd] section of your ceph.conf.
sage
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