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List:       ceph-devel
Subject:    Re: RBD performance - tuning hints / major slowdown effect(s)
From:       Mark Kirkwood <mark.kirkwood () catalyst ! net ! nz>
Date:       2012-08-31 10:16:26
Message-ID: 50408EFA.3000403 () catalyst ! net ! nz
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Sorry Dieter,

Not trying to say "you are wrong" or anything like that - just trying to 
add to the problem solving body of knowledge that from what *I* have 
tried out the 'sync' issue does not look to be the bad guy here - altho 
more analysis is always welcome (usual story - my findings should be 
confirm-able by others doing similar tests)!

regards

Mark

On 31/08/12 21:49, Dieter Kasper wrote:
> Mark, Inktank,
>
> OK, it is very likely that 'sync_file_range' is not the major slowdown 'culprit'.
>
> But, which areas (design, current implementation, protocol, interconnect, tuning parameter, ...)
> would you rate as 'major slowdown effect(s)' ?
>

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