On 06/03/2015 04:15 AM, Jan Schermer wrote:
Thanks for a very helpful answer.
So if I understand it correctly then what I want (crash consistency with RPO0)
isn’t possible now in any way.
If there is no ordering in RBD cache then ignoring barriers sounds like a very
bad idea also.
Yes,
Thanks for a very helpful answer.
So if I understand it correctly then what I want (crash consistency with RPO0)
isn’t possible now in any way.
If there is no ordering in RBD cache then ignoring barriers sounds like a very
bad idea also.
Any thoughts on ext4 with journal_async_commit? That
On 06/01/2015 03:41 AM, Jan Schermer wrote:
Thanks, that’s it exactly.
But I think that’s really too much work for now, that’s why I really would like
to see a quick-win by using the local RBD cache for now - that would suffice
for most workloads (not too many people run big databases on CEPH
-Original Message-
From: ceph-users [mailto:ceph-users-boun...@lists.ceph.com] On Behalf Of
Mark Nelson
Sent: 27 May 2015 16:00
To: ceph-users@lists.ceph.com
Subject: Re: [ceph-users] Synchronous writes - tuning and some thoughts
about them?
On 05/27/2015 09:33 AM, Jan Schermer
Thanks, that’s it exactly.
But I think that’s really too much work for now, that’s why I really would like
to see a quick-win by using the local RBD cache for now - that would suffice
for most workloads (not too many people run big databases on CEPH now, those
who do must be aware of this).
...@lists.ceph.com] On Behalf
Of Jan Schermer
Sent: 25 May 2015 09:59
To: ceph-users@lists.ceph.com
Subject: [ceph-users] Synchronous writes - tuning and some thoughts
about them?
Hi,
I have a full-ssd cluster on my hands, currently running Dumpling,
with plans to upgrade soon, and Openstack
Schermer
Sent: 25 May 2015 21:14
To: Nick Fisk
Cc: ceph-users@lists.ceph.com
Subject: Re: [ceph-users] Synchronous writes - tuning and some thoughts
about them?
Hi Nick,
flashcache doesn’t support barriers, so I haven’t even considered it. I used a
few years ago to speed up some workloads out
To: Nick Fisk
Cc: ceph-users@lists.ceph.com
Subject: Re: [ceph-users] Synchronous writes - tuning and some thoughts
about them?
Hi Nick,
flashcache doesn’t support barriers, so I haven’t even considered it. I used
a
few years ago to speed up some workloads out of curiosity and it worked
well
Hi,
I have a full-ssd cluster on my hands, currently running Dumpling, with plans
to upgrade soon, and Openstack with RBD on top of that. While I am overall
quite happy with the performance (scales well accross clients), there is one
area where it really fails bad - big database workloads.
.
Nick
-Original Message-
From: ceph-users [mailto:ceph-users-boun...@lists.ceph.com] On Behalf Of
Jan Schermer
Sent: 25 May 2015 09:59
To: ceph-users@lists.ceph.com
Subject: [ceph-users] Synchronous writes - tuning and some thoughts about
them?
Hi,
I have a full-ssd cluster
be at the top of anyone's
priority's.
Nick
-Original Message-
From: ceph-users [mailto:ceph-users-boun...@lists.ceph.com] On Behalf Of
Jan Schermer
Sent: 25 May 2015 09:59
To: ceph-users@lists.ceph.com
Subject: [ceph-users] Synchronous writes - tuning and some thoughts about
them
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