2015-02-27 20:56 GMT+08:00 Alexandre DERUMIER :
> Hi,
>
> from qemu rbd.c
>
> if (flags & BDRV_O_NOCACHE) {
> rados_conf_set(s->cluster, "rbd_cache", "false");
> } else {
> rados_conf_set(s->cluster, "rbd_cache", "true");
> }
>
> and
> block.c
>
> int bdrv_parse_cache_f
I am wondering how the value of journal_align_min_size gives impact on
journal padding. Is there any document describing the disk layout of
journal?
Thanks for help!
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2014-10-20 21:04 GMT+08:00 Mark Nelson :
> On 10/20/2014 06:27 AM, Mark Wu wrote:
>
>> Test result Update:
>>
>>
>> Number of Hosts Maximum single volume IOPS Maximum aggregated IOPS
>> SSD Disk IOPS SSD Disk Utilization
>>
>> 7
performs worse than 9 hosts), is
there any tuning suggestion to improve it?
Thanks!
2014-10-17 16:52 GMT+08:00 Mark Wu :
>
> >> I assume you added more clients and checked that it didn't scale past
> >> that?
> Yes, correct.
> >> You might look through th
olumes can reach the peak.
>
> What is your cpu usage of fio-rbd ?
> Myself I'm cpu bound on 8cores with around 4iops read 4K.
>
>
>
> - Mail original -
>
> De: "Mark Wu"
> À: "Daniel Schwager"
> Cc: ceph-users@lists.ceph.com
>
0'
2014-10-17 8:45 GMT+08:00 Shu, Xinxin :
> We do observe the same issue on our 12 SSD setup, disable the all log
> maybe helpful.
>
>
>
> Cheers,
>
> xinxin
>
>
>
> *From:* ceph-users [mailto:ceph-users-boun...@lists.ceph.com] *On Behalf
>
03
16 40522
32 6057
48 1102
64 243
80 60
96 37
112 18
128 8
>
>
>
> On Thu, Oct 16, 2014 at 9:51 AM, Mark Wu wrote:
> > Thanks for the reply. I am not using single client. Writing 5 rbd
> volumes on
> > 3 host can reach the peak. The cli
forgot to cc the list
-- 转发的邮件 --
发件人："Mark Wu"
日期：2014 年 10 月 17 日 上午 12:51
主题：Re: [ceph-users] Performance doesn't scale well on a full ssd cluster.
收件人："Gregory Farnum"
抄送：
Thanks for the reply. I am not using single client. Writing 5 rbd volumes
on
Thanks for the detailed information. but I am already using fio with rbd
engine. Almost 4 volumes can reach the peak.
2014 年 10 月 17 日 上午 1:03于 wud...@gmail.com写道：
Thanks for the detailed information. but I am already using fio with rbd
engine. Almost 4 volumes can reach the peak.
2014 年 10 月 17 日
00 4912.00 0.00 91204.5018.57
2.250.46 0.09 43.60
dm-0 0.00 0.000.000.00 0.00 0.00 0.00
0.000.00 0.00 0.00
dm-1 0.00 0.000.00 18.00 0.00 568.0031.56
0.000.17 0.06 0.10
Regard
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