: ceph-users [mailto:ceph-users-boun...@lists.ceph.com] On Behalf Of
David Moreau Simard
Sent: 05 December 2014 16:03
To: Nick Fisk
Cc: ceph-users@lists.ceph.com
Subject: Re: [ceph-users] Poor RBD performance as LIO iSCSI target
I've flushed everything - data, pools, configs and reconfigured
@lists.ceph.com
Subject: Re: [ceph-users] Poor RBD performance as LIO iSCSI target
I've flushed everything - data, pools, configs and reconfigured the whole
thing.
I was particularly careful with cache tiering configurations (almost leaving
defaults when possible) and it's not locking anymore.
It looks like
: Re: [ceph-users] Poor RBD performance as LIO iSCSI target
I've flushed everything - data, pools, configs and reconfigured the whole
thing.
I was particularly careful with cache tiering configurations (almost
leaving
defaults when possible) and it's not locking anymore.
It looks like
: [ceph-users] Poor RBD performance as LIO iSCSI target
Rama,
Thanks for your reply.
My end goal is to use iSCSI (with LIO/targetcli) to export rbd block
devices.
I was encountering issues with iSCSI which are explained in my
previous emails.
I ended up being able to reproduce the problem
-boun...@lists.ceph.com] On Behalf Of
David Moreau Simard
Sent: 05 December 2014 16:03
To: Nick Fisk
Cc: ceph-users@lists.ceph.com
Subject: Re: [ceph-users] Poor RBD performance as LIO iSCSI target
I've flushed everything - data, pools, configs and reconfigured the whole
thing.
I was particularly
: [ceph-users] Poor RBD performance as LIO iSCSI target
Rama,
Thanks for your reply.
My end goal is to use iSCSI (with LIO/targetcli) to export rbd block
devices.
I was encountering issues with iSCSI which are explained in my
previous emails.
I ended up being able to reproduce
-Original Message-
From: ceph-users [mailto:ceph-users-boun...@lists.ceph.com] On Behalf Of
David Moreau Simard
Sent: 19 November 2014 10:48
To: Ramakrishna Nishtala (rnishtal)
Cc: ceph-users@lists.ceph.com; Nick Fisk
Subject: Re: [ceph-users] Poor RBD performance as LIO iSCSI target
Rama,
Thanks
: Tuesday, November 18, 2014 3:49 PM
To: Nick Fisk
Cc: ceph-users@lists.ceph.com
Subject: Re: [ceph-users] Poor RBD performance as LIO iSCSI target
Testing without the cache tiering is the next test I want to do when I
have time..
When it's hanging, there is no activity at all
emit
}
-Original Message-
From: ceph-users [mailto:ceph-users-boun...@lists.ceph.com] On Behalf Of
David Moreau Simard
Sent: 20 November 2014 20:03
To: Nick Fisk
Cc: ceph-users@lists.ceph.com
Subject: Re: [ceph-users] Poor RBD performance as LIO iSCSI target
Nick,
Can you share more
Thanks guys. I looked at http://tracker.ceph.com/issues/8818 and chatted with
dis on #ceph-devel.
I ran a LOT of tests on a LOT of comabination of kernels (sometimes with
tunables legacy). I haven't found a magical combination in which the following
test does not hang:
fio --name=writefile
-users] Poor RBD performance as LIO iSCSI target
Thanks guys. I looked at http://tracker.ceph.com/issues/8818 and chatted
with dis on #ceph-devel.
I ran a LOT of tests on a LOT of comabination of kernels (sometimes with
tunables legacy). I haven't found a magical combination in which the
following
Christie
Cc: ceph-users@lists.ceph.com; Christopher Spearman
Subject: Re: [ceph-users] Poor RBD performance as LIO iSCSI target
Thanks guys. I looked at http://tracker.ceph.com/issues/8818 and chatted
with dis on #ceph-devel.
I ran a LOT of tests on a LOT of comabination of kernels
: ceph-users [mailto:ceph-users-boun...@lists.ceph.com] On Behalf Of David
Moreau Simard
Sent: Tuesday, November 18, 2014 3:49 PM
To: Nick Fisk
Cc: ceph-users@lists.ceph.com
Subject: Re: [ceph-users] Poor RBD performance as LIO iSCSI target
Testing without the cache tiering is the next test I want
Running into weird issues here as well in a test environment. I don't have a
solution either but perhaps we can find some things in common..
Setup in a nutshell:
- Ceph cluster: Ubuntu 14.04, Kernel 3.16.7, Ceph 0.87-1 (OSDs with separate
public/cluster network in 10 Gbps)
- iSCSI Proxy node
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wrote:
Is possible that you hit bug #8818 ?
German Anders
--- Original message ---
Asunto: Re: [ceph-users] Poor RBD performance as LIO iSCSI target
De: David Moreau Simard dmsim...@iweb.com
Para: Christopher Spearman neromaver...@gmail.com
Cc
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On 11/13/2014 10:17 AM, David Moreau Simard wrote:
Running into weird issues here as well in a test environment. I don't have a
solution either but perhaps we can find some things in common..
Setup in a nutshell:
- Ceph cluster: Ubuntu 14.04, Kernel 3.16.7, Ceph 0.87-1 (OSDs with separate
I've noticed a pretty steep performance degradation when using RBDs with
LIO. I've tried a multitude of configurations to see if there are any
changes in performance and I've only found a few that work (sort of).
Details about the systems being used:
- All network hardware for data is 10gbe,
On 10/27/2014 04:24 PM, Christopher Spearman wrote:
- What tested with bad performance (Reads ~25-50MB/s - Writes ~25-50MB/s)
* RBD setup as target using LIO
* RBD - LVM - LIO target
* RBD - RAID0/1 - LIO target
- What tested with good performance (Reads ~700-800MB/s - Writes
Sage:
That'd be my assumption, performance looked pretty fantastic over loop
until it started being used it heavily
Mike:
The configs you asked for are at the end of this message I've subtracted
changed some info, iqn/wwn/portal, for security purposes. The raw loop
target configs are all in
I've noticed a pretty steep performance degradation when using RBDs with
LIO. I've tried a multitude of configurations to see if there are any
changes in performance and I've only found a few that work (sort of).
Details about the systems being used:
- All network hardware for data is 10gbe,
Hi Chris,
I'm doing something very similar to you, however only in a very early stage of
testing, but I don't seem to see the same problem that you are experiencing.
My setup is as follows:-
1x HP DL360 Server Running ESX 5.1
8x 10K SAS 146GB drives each configured as a RAID 0 and with a
Hi Nick,
Thanks for the response, I'm glad to hear you've got something that
provides reasonable performance, that brings some hope to my situation.
I am using the kernel RBD client.
Using a different OS for the gateway/iSCSI nodes was going to be my next
step. Especially now, seeing that you
: Tuesday, October 28, 2014 5:24 AM
To: ceph-users@lists.ceph.com
Subject: [ceph-users] Poor RBD performance as LIO iSCSI target
I've noticed a pretty steep performance degradation when using RBDs with LIO.
I've tried a multitude of configurations to see if there are any changes in
performance
[mailto:ceph-users-boun...@lists.ceph.com] On Behalf Of
Christopher Spearman
Sent: Tuesday, October 28, 2014 5:24 AM
To: ceph-users@lists.ceph.com
Subject: [ceph-users] Poor RBD performance as LIO iSCSI target
I've noticed a pretty steep performance degradation when using RBDs with
LIO
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