Re: When ceph synchronizes journal to disk? / read request

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On Tuesday, March 5, 2013 at 12:37 AM, Dieter Kasper wrote:
> Hi Gregory,
> 
> another interesting aspect for me is:
> How will a read-request for this block/sub-block (pending between journal and OSD)
> be satisfied (assuming the client will not cache) ?
> Will this read go to the journal or to the OSD ?
> 
All read requests are satisfied from the main OSD store filesystem. Satisfying reads from the journal would be extraordinarily complicated and not buy us anything that I can think of. (In fact the journal is only read during recovery).
-Greg
Software Engineer #42 @ http://inktank.com | http://ceph.com 


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