oy'
> Cc: ceph-users@lists.ceph.com
> Subject: Re: [ceph-users] Old vs New pool on same OSDs - Performance
> Difference
>
> > -Original Message-
> > From: Somnath Roy [mailto:somnath@sandisk.com]
> > Sent: 29 June 2015 23:29
> > To: Nick Fisk
&
> -Original Message-
> From: Somnath Roy [mailto:somnath@sandisk.com]
> Sent: 29 June 2015 23:29
> To: Nick Fisk
> Cc: ceph-users@lists.ceph.com
> Subject: RE: [ceph-users] Old vs New pool on same OSDs - Performance
> Difference
>
> Nick,
> I think you
]
Sent: Monday, June 29, 2015 3:05 PM
To: Somnath Roy
Cc: ceph-users@lists.ceph.com
Subject: RE: [ceph-users] Old vs New pool on same OSDs - Performance Difference
Sorry, forgot to enable that. Here is another capture with it on and I think
you are spot on as I can see a 100ms delay doing the g
349 pg[0.128( v
26335'8141858 (26331'8138777,26335'8141858] local-les=26276 n=5243 ec=1 les/c
26276/26305 26264/26272/26272) [1,21,31] r=0 lpr=26272 crt=26335'8141855 lcod
26335'8141857 mlcod 26335'8141857 active+clean] publish_stats_to_osd
26349:8019961
2015-06-29 22:
7;_snapset'...
Thanks & Regards
Somnath
-Original Message-
From: Nick Fisk [mailto:n...@fisk.me.uk]
Sent: Monday, June 29, 2015 4:54 AM
To: Somnath Roy
Cc: ceph-users@lists.ceph.com
Subject: RE: [ceph-users] Old vs New pool on same OSDs - Performance Difference
Hi Somnath,
Sorry for the
335'1369662] local-les=26276 n=5050 ec=1 les/c
26276/26311 26264/26270/26270) [1,23,11] r=0 lpr=26270 crt=26335'1369659 lcod
26335'1369661 mlcod 26335'1369661 active+clean] log_op_stats
osd_op(client.2808923.0:188 rb.0.1ba70.238e1f29.264a [read
720896~65536] 0.52c3
sts.ceph.com
> Subject: Re: [ceph-users] Old vs New pool on same OSDs - Performance
> Difference
>
> Nick,
> I think the only IO operation between 'reached_pg' and 'started' is
> fetching the xttrs. Check the following.
>
> 1. Enable debug log 20 (
this helps,
>
> Thanks & Regards
> Somnath
>
> -Original Message-
> From: Nick Fisk [mailto:n...@fisk.me.uk]
> Sent: Saturday, June 20, 2015 8:10 AM
> To: Somnath Roy
> Cc: ceph-users@lists.ceph.com
> Subject: RE: [ceph-users] Old vs New pool on same OSDs
this helps,
Thanks & Regards
Somnath
-Original Message-
From: Nick Fisk [mailto:n...@fisk.me.uk]
Sent: Saturday, June 20, 2015 8:10 AM
To: Somnath Roy
Cc: ceph-users@lists.ceph.com
Subject: RE: [ceph-users] Old vs New pool on same OSDs - Performance Difference
Sorry to dig up this old thre
20 15:39:05.679615",
"event": "done"
}
]
]
The main delay seems to happen between reached_pg and started, any idea what
would be happening in this period?
Nick
> -Original Message-
> Fr
Old vs New pool on same OSDs - Performance Difference
> -Original Message-
> From: ceph-users [mailto:ceph-users-boun...@lists.ceph.com] On Behalf
> Of Somnath Roy
> Sent: 04 June 2015 22:41
> To: Nick Fisk; 'Gregory Farnum'
> Cc: ceph-users@lists.ceph.com
> Subject:
> -Original Message-
> From: ceph-users [mailto:ceph-users-boun...@lists.ceph.com] On Behalf Of
> Somnath Roy
> Sent: 04 June 2015 22:41
> To: Nick Fisk; 'Gregory Farnum'
> Cc: ceph-users@lists.ceph.com
> Subject: Re: [ceph-users] Old vs New pool on same
, June 04, 2015 2:12 PM
To: 'Gregory Farnum'; Somnath Roy
Cc: ceph-users@lists.ceph.com
Subject: RE: [ceph-users] Old vs New pool on same OSDs - Performance Difference
> -Original Message-
> From: ceph-users [mailto:ceph-users-boun...@lists.ceph.com] On Behalf
> Of Gregory
> -Original Message-
> From: ceph-users [mailto:ceph-users-boun...@lists.ceph.com] On Behalf Of
> Gregory Farnum
> Sent: 04 June 2015 21:22
> To: Nick Fisk
> Cc: ceph-users@lists.ceph.com
> Subject: Re: [ceph-users] Old vs New pool on same OSDs - Performance
> Diffe
On Thu, Jun 4, 2015 at 6:31 AM, Nick Fisk wrote:
>
> Hi All,
>
> I have 2 pools both on the same set of OSD’s, 1st is the default rbd pool
> created at installation 3 months ago, the other has just recently been
> created, to verify performance problems.
>
> As mentioned both pools are on the sa
Nick,
Did you preinitialize the new rbd volume ?
If not, do a seq write to fill up the entire volume first and then do a Random
read.
Thanks & Regards
Somnath
From: ceph-users [mailto:ceph-users-boun...@lists.ceph.com] On Behalf Of Nick
Fisk
Sent: Thursday, June 04, 2015 6:32 AM
To: ceph-users
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