Re: [ceph-users] Why is librbd1 / librados2 from Firefly 20% slower than the one from dumpling?

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Hi Greg,

Am 26.06.2014 02:17, schrieb Gregory Farnum:
> Sorry we let this drop; we've all been busy traveling and things.
> 
> There have been a lot of changes to librados between Dumpling and
> Firefly, but we have no idea what would have made it slower. Can you
> provide more details about how you were running these tests?

it's just a normal fio run:
fio --ioengine=rbd --bs=4k --name=foo --invalidate=0
--readwrite=randwrite --iodepth=32 --rbdname=fio_test2 --pool=teststor
--runtime=90 --numjobs=32 --direct=1 --group

Running one time with firefly libs and one time with dumpling libs.
Traget is always the same pool on a firefly ceph storage.

Stefan

> -Greg
> Software Engineer #42 @ http://inktank.com | http://ceph.com
> 
> 
> On Fri, Jun 13, 2014 at 7:59 AM, Stefan Priebe <s.priebe@xxxxxxxxxxxx> wrote:
>> Hi,
>>
>> while testint firefly i cam into the sitation where i had a client where the
>> latest dumpling packages where installed (0.67.9).
>>
>> As my pool has hashppool false and the tunables are set to default it can
>> talk to my firefly ceph sotrage.
>>
>> For random 4k writes using fio with librbd and 32 jobs and an iodepth of 32.
>>
>> I get these results:
>>
>> librbd / librados2 from dumpling:
>>   write: io=3020.9MB, bw=103083KB/s, iops=25770, runt= 30008msec
>>   WRITE: io=3020.9MB, aggrb=103082KB/s, minb=103082KB/s, maxb=103082KB/s,
>> mint=30008msec, maxt=30008msec
>>
>> librbd / librados2 from firefly:
>>   write: io=7344.3MB, bw=83537KB/s, iops=20884, runt= 90026msec
>>   WRITE: io=7344.3MB, aggrb=83537KB/s, minb=83537KB/s, maxb=83537KB/s,
>> mint=90026msec, maxt=90026msec
>>
>> Stefan
>> _______________________________________________
>> ceph-users mailing list
>> ceph-users@xxxxxxxxxxxxxx
>> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
--
To unsubscribe from this list: send the line "unsubscribe ceph-devel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html




[Index of Archives]     [CEPH Users]     [Ceph Large]     [Information on CEPH]     [Linux BTRFS]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]
  Powered by Linux