On Wed, Jun 12, 2019 at 6:48 AM Glen Baars <glen@xxxxxxxxxxxxxxxxxxxxxx> wrote:
Interesting performance increase! I'm Iscsi it at a few installations and now a wonder what version of Centos is required to improve performance! Did the cluster go from Luminous to Mimic?
wild guess: probably related to updating tcmu-runner from 1.3 to 1.4; the old versions had a bug that caused a long timeout on some operations in some workloads
Paul
Glen
-----Original Message-----
From: ceph-users <ceph-users-bounces@xxxxxxxxxxxxxx> On Behalf Of Heðin Ejdesgaard Møller
Sent: Saturday, 8 June 2019 8:00 AM
To: Paul Emmerich <paul.emmerich@xxxxxxxx>; Igor Podlesny <ceph-user@xxxxxxxx>
Cc: Ceph Users <ceph-users@xxxxxxxxxxxxxx>
Subject: Re: Any CEPH's iSCSI gateway users?
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I recently upgraded a RHCS-3.0 cluster with 4 iGW's to RHCS-3.2 on top of RHEL-
7.6
Big block size performance went from ~350MB/s to about 1100MB/s on each lun, seen from a VM in vSphere-6.5 with data read from an ssd pool and written to a hdd pool, both being 3/2 replica.
I have not experienced any hick-up since the upgrade.
You will always have a degree of performance hit when using the iGW, because it's both an extra layer between consumer and hardware, and a potential choke- point, just like any "traditional" iSCSI based SAN solution.
If you are considering to deploy the iGW on the upstream bits then I would recommend you to stick to CentOS, since a lot of it's development have happened on the RHEL platform.
Regards
Heðin Ejdesgaard
Synack sp/f
On frí, 2019-06-07 at 12:44 +0200, Paul Emmerich wrote:
> Hi,
>
> ceph-iscsi 3.0 fixes a lot of problems and limitations of the older gateway.
>
> Best way to run it on Debian/Ubuntu is to build it yourself
>
>
> Paul
>
> --
> Paul Emmerich
>
> Looking for help with your Ceph cluster? Contact us at
> https://croit.io
>
> croit GmbH
> Freseniusstr. 31h
> 81247 München
> www.croit.io
> Tel: +49 89 1896585 90
>
>
> On Tue, May 28, 2019 at 10:02 AM Igor Podlesny <ceph-user@xxxxxxxx> wrote:
> > What is your experience?
> > Does it make sense to use it -- is it solid enough or beta quality
> > rather (both in terms of stability and performance)?
> >
> > I've read it was more or less packaged to work with RHEL. Does it
> > hold true still?
> > What's the best way to install it on, say, CentOS or Debian/Ubuntu?
> >
> > _______________________________________________
> > ceph-users mailing list
> > ceph-users@xxxxxxxxxxxxxx
> > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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