Cc: ceph-users@lists.ceph.com
Subject: Re: [ceph-users] How to improve single thread sequential reads?
Have you tried setting read_ahead_kb to bigger number for both client/OSD
side if you are using krbd ?
In case of librbd, try the different config options for rbd cache..
Thanks Regards
@lists.ceph.com
Subject: Re: [ceph-users] How to improve single thread sequential reads?
Have you tried setting read_ahead_kb to bigger number for both client/OSD
side if you are using krbd ?
In case of librbd, try the different config options for rbd cache..
Thanks Regards
Somnath
-Original
: Re: [ceph-users] How to improve single thread sequential reads?
I'm not sure if I missed that but are you testing in a VM backed by RBD
device, or using the device directly?
I don't see how blk-mq would help if it's not a VM, it just passes the
request
to the underlying block device
Sent: 17 August 2015 03:36
To: Alex Gorbachev a...@iss-integration.com; Nick Fisk n...@fisk.me.uk
Cc: ceph-users@lists.ceph.com
Subject: Re: [ceph-users] How to improve single thread sequential reads?
Have you tried setting read_ahead_kb to bigger number for both client/OSD
side if you are using
@traced.net
Cc: ceph-users@lists.ceph.com; Nick Fisk n...@fisk.me.uk
Subject: Re: [ceph-users] How to improve single thread sequential reads?
I'm not sure if I missed that but are you testing in a VM backed by RBD
device, or using the device directly?
I don't see how blk-mq would help
-Original Message-
From: ceph-users [mailto:ceph-users-boun...@lists.ceph.com] On Behalf Of
Jan Schermer
Sent: 18 August 2015 12:41
To: Nick Fisk n...@fisk.me.uk
Cc: ceph-users@lists.ceph.com
Subject: Re: [ceph-users] How to improve single thread sequential reads?
Reply
Fraunhofer given.to.lists.ceph-
users.ceph.com.toasta@traced.net
Cc: ceph-users@lists.ceph.com; Nick Fisk n...@fisk.me.uk
Subject: Re: [ceph-users] How to improve single thread sequential
reads?
I'm not sure if I missed that but are you testing in a VM backed by
RBD device, or using
Of
Somnath Roy
Sent: 17 August 2015 03:36
To: Alex Gorbachev a...@iss-integration.com; Nick Fisk n...@fisk.me.uk
Cc: ceph-users@lists.ceph.com
Subject: Re: [ceph-users] How to improve single thread sequential reads?
Have you tried setting read_ahead_kb to bigger number for both client/OSD
side
Hi Nick,
On Thu, Aug 13, 2015 at 4:37 PM, Nick Fisk n...@fisk.me.uk wrote:
-Original Message-
From: ceph-users [mailto:ceph-users-boun...@lists.ceph.com] On Behalf Of
Nick Fisk
Sent: 13 August 2015 18:04
To: ceph-users@lists.ceph.com
Subject: [ceph-users] How to improve single
Of Alex
Gorbachev
Sent: Sunday, August 16, 2015 7:07 PM
To: Nick Fisk
Cc: ceph-users@lists.ceph.com
Subject: Re: [ceph-users] How to improve single thread sequential reads?
Hi Nick,
On Thu, Aug 13, 2015 at 4:37 PM, Nick Fisk n...@fisk.me.uk wrote:
-Original Message-
From: ceph-users
Hi,
I'm trying to use a RBD to act as a staging area for some data before
pushing it down to some LTO6 tapes. As I cannot use striping with the kernel
client I tend to be maxing out at around 80MB/s reads testing with DD. Has
anyone got any clever suggestions of giving this a bit of a boost, I
-Original Message-
From: ceph-users [mailto:ceph-users-boun...@lists.ceph.com] On Behalf Of
Nick Fisk
Sent: 13 August 2015 18:04
To: ceph-users@lists.ceph.com
Subject: [ceph-users] How to improve single thread sequential reads?
Hi,
I'm trying to use a RBD to act as a staging
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