Hi Sage and all,
We are going to use SSDs for cache in ceph. But I am not sure which
one is the best solution, bcache? flashcache? or cache tier?
I found there are some CAUTION in ceph.com about cache tiering. Is cache
tiering is already production ready? especially for rbd.
thanx in adv
Hollander
Cc: Dongsheng Yang ; Nick Fisk
; Ceph Users
Subject: Re: [ceph-users] bcache vs flashcache vs cache tiering
On Tue, Feb 14, 2017 at 8:25 AM, Wido den Hollander
wrote:
Op 14 februari 2017 om 11:14 schreef Nick Fisk :
-Original Message-
From: ceph-users [mailto:ceph-users-boun
BTW, is there any body using EnhanceIO?
On 02/15/2017 05:51 PM, Dongsheng Yang wrote:
thanx Nick, Gregory and Wido,
So at least, we can say the cache tiering in Jewel is stable
enough I think.
I like cache tiering more than the others, but yes, there is a problem
about cache tiering in
:rbd: show the snapshot tree
Date: Fri, 17 Mar 2017 11:50:17 +0800
From: Dongsheng Yang
To: 'Ceph Users'
CC: jason , chenhanx...@gmail.com
Hi guys,
There is an idea about showing the snapshots of an image in a tree
view, as
what vmware is doing in screensho
Hi Christoph,
On 03/23/2017 07:16 PM, Christoph Adomeit wrote:
Hello List,
i am wondering if there is meanwhile an easy method in ceph to find more
information about rbd-images.
For example I am interested in the modification time of an rbd image.
Do you mean some metadata changing? such as
On 03/23/2017 07:32 PM, Dongsheng Yang wrote:
Hi Christoph,
On 03/23/2017 07:16 PM, Christoph Adomeit wrote:
Hello List,
i am wondering if there is meanwhile an easy method in ceph to find
more information about rbd-images.
For example I am interested in the modification time of an rbd
ages might be unused.
Christoph
On Thu, Mar 23, 2017 at 07:32:49PM +0800, Dongsheng Yang wrote:
Hi Christoph,
On 03/23/2017 07:16 PM, Christoph Adomeit wrote:
Hello List,
i am wondering if there is meanwhile an easy method in ceph to find more
information about rbd-images.
For example I am int
.
On Thu, Mar 23, 2017 at 08:10:05PM +0800, Dongsheng Yang wrote:
Did you enable the journaling feature?
On 03/23/2017 07:44 PM, Christoph Adomeit wrote:
Hi Yang,
I mean "any write" to this image.
I am sure we have a lot of not-used-anymore rbd images in our pool and I am
trying to
Hi Masha
you can get the counters by perf dump command on the asok file of
your client. such as that:
$ ceph --admin-daemon out/client.admin.9921.asok perf dump|grep rd
"rd": 656754,
"rd_bytes": 656754,
"rd_latency": {
"discard": 0,
"discard_bytes": 0,
Hi Fulvio,
On 03/24/2017 07:19 PM, Fulvio Galeazzi wrote:
Hallo, apologies for my (silly) questions, I did try to find some doc
on rbd-mirror but was unable to, apart from a number of pages
explaining how to install it.
My environment is CenOS7 and Ceph 10.2.5.
Can anyone help me understand
nd in my last mail I think.
If you want to get the performance counter for an image (no matter how
many ImageCtx, connected or disconnected),
maybe you need to wait this one:
http://pad.ceph.com/p/ceph-top
Yang
Thanks!
On 27/03/17 12:29, Dongsheng Yang wrote:
Hi Masha
you can get the c
Yang
On 27/03/2017, 21:20, Jason Dillaman wrote:
On Mon, Mar 27, 2017 at 4:00 AM, Dongsheng Yang
wrote:
Hi Fulvio,
On 03/24/2017 07:19 PM, Fulvio Galeazzi wrote:
Hallo, apologies for my (silly) questions, I did try to find some doc on
rbd-mirror but was unable to, apart from a number of
o the
bottom of backlog.
[1] https://trello.com/b/ugTc2QFH/ceph-backlog
Yes, agree, let's focus on the other higher-priority backlog items now.
Thanx
On Fri, Mar 24, 2017 at 3:27 AM, Dongsheng Yang
wrote:
Hi jason,
do you think this is a good feature for rbd?
maybe we can implement
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