-Original Message-
From: Sage Weil [mailto:s...@inktank.com]
Sent: 2013年3月25日 23:35
To: Chen, Xiaoxi
Cc: 'ceph-users@lists.ceph.com' (ceph-users@lists.ceph.com);
ceph-de...@vger.kernel.org
Subject: Re: [ceph-users] Ceph Crach at sync_thread_timeout after heavy random
writes.
Hi Xiaox
Hi Xiaoxi,
On Mon, 25 Mar 2013, Chen, Xiaoxi wrote:
> From Ceph-w , ceph reports a very high Ops (1+ /s) , but
> technically , 80 spindles can provide up to 150*80/2=6000 IOPS for 4K random
> write.
>
> When digging into the code, I found that the OSD write data to
> Pagecac
Rephrase it to make it more clear
From: ceph-users-boun...@lists.ceph.com
[mailto:ceph-users-boun...@lists.ceph.com] On Behalf Of Chen, Xiaoxi
Sent: 2013年3月25日 17:02
To: 'ceph-users@lists.ceph.com' (ceph-users@lists.ceph.com)
Cc: ceph-de...@vger.kernel.org
Subject: [ceph-users] Ceph Crach at sync
On 03/25/2013 10:35 AM, Chen, Xiaoxi wrote:
> OK,but my VM didnt crash, it's ceph-osd daemon crashed. So is it safe for me
> to say the issue I hit is a different issue?(not #3737)
Yes, then it surely is a different issue. Actually you just said ceph
crashed, no mention of an OSD, so it was ha
Hi,
在 2013-3-25，17:30，"Wolfgang Hennerbichler"
写道：
> Hi Xiaoxi,
>
> sorry, I thought you were testing within VMs and caching turned on (I
> assumed, you didn't tell us if you really did use your benchmark within
> vms and if not, how you tested rbd outside of VMs).
Yes,I really testing within
Hi Xiaoxi,
sorry, I thought you were testing within VMs and caching turned on (I
assumed, you didn't tell us if you really did use your benchmark within
vms and if not, how you tested rbd outside of VMs).
It just triggered an alarm in me because we had also experienced issues
with benchmarking wit
Hi Wolfgang，
Thanks for the reply，but why my problem is related with issue#3737？ I
cannot find any direct link between them. I didnt turn on qemu cache and my
qumu/VM work fine
Xiaoxi
在 2013-3-25，17:07，"Wolfgang Hennerbichler"
写道：
> Hi,
>
> this could be related
Hi,
this could be related to this issue here and has been reported multiple
times:
http://tracker.ceph.com/issues/3737
In short: They're working on it, they know about it.
Wolfgang
On 03/25/2013 10:01 AM, Chen, Xiaoxi wrote:
> Hi list,
>
> We have hit and reproduce this issue for sev
