Thanks for the report !
vs your first benchmark, it's with RBD 4M or 64K ?
(how much ssd by node?)
----- Mail original -----
De: "Dieter Kasper" <d.kasper@xxxxxxxxxxxx>
À: "Alexandre DERUMIER" <aderumier@xxxxxxxxx>
Cc: ceph-devel@xxxxxxxxxxxxxxx
Envoyé: Jeudi 30 Août 2012 16:56:34
Objet: Re: RBD performance - tuning hints
Hi Alexandre,
with the 4 filestore parameter below some fio values could be increased:
filestore max sync interval = 30
filestore min sync interval = 29
filestore flusher = false
filestore queue max ops = 10000
###### IOPS
fio_read_4k_64: 9373
fio_read_4k_128: 9939
fio_randwrite_8k_16: 12376
fio_randwrite_4k_16: 13315
fio_randwrite_512_32: 13660
fio_randwrite_8k_32: 17318
fio_randwrite_4k_32: 18057
fio_randwrite_8k_64: 19693
fio_randwrite_512_64: 20015 <<<
fio_randwrite_4k_64: 20024 <<<
fio_randwrite_8k_128: 20547 <<<
fio_randwrite_4k_128: 20839 <<<
fio_randwrite_512_128: 21417 <<<
fio_randread_8k_128: 48872
fio_randread_4k_128: 50002
fio_randread_512_128: 51202
###### MB/s
fio_randread_2m_32: 628
fio_read_4m_64: 630
fio_randread_8m_32: 633
fio_read_2m_32: 637
fio_read_4m_16: 640
fio_randread_4m_16: 652
fio_write_2m_32: 660
fio_randread_4m_32: 677
fio_read_4m_32: 678
(...)
fio_write_4m_64: 771
fio_randwrite_2m_64: 789
fio_write_8m_128: 796
fio_write_4m_32: 802
fio_randwrite_4m_128: 807 <<<
fio_randwrite_2m_32: 811 <<<
fio_write_2m_128: 833 <<<
fio_write_8m_64: 901 <<<
Best Regards,
-Dieter
On Wed, Aug 29, 2012 at 10:50:12AM +0200, Alexandre DERUMIER wrote:
> Nice results !
> (can you make same benchmark from a qemu-kvm guest with virtio-driver ?
> I have made some bench some month ago with stephan priebe, and we never be able to have more than 20000iops, with a full ssd 3nodes cluster)
>
> >>How can I set the variables when the Journal data have go to the OSD ? (after X seconds and/or when Y %-full)
> I think you can try to tune these values
>
> filestore max sync interval = 30
> filestore min sync interval = 29
> filestore flusher = false
> filestore queue max ops = 10000
>
>
>
> ----- Mail original -----
>
> De: "Dieter Kasper" <d.kasper@xxxxxxxxxxxx>
> À: ceph-devel@xxxxxxxxxxxxxxx
> Cc: "Dieter Kasper (KD)" <d.kasper@xxxxxxxxxxxx>
> Envoyé: Mardi 28 Août 2012 19:48:42
> Objet: RBD performance - tuning hints
>
> Hi,
>
> on my 4-node system (SSD + 10GbE, see bench-config.txt for details)
> I can observe a pretty nice rados bench performance
> (see bench-rados.txt for details):
>
> Bandwidth (MB/sec): 961.710
> Max bandwidth (MB/sec): 1040
> Min bandwidth (MB/sec): 772
>
>
> Also the bandwidth performance generated with
> fio --filename=/dev/rbd1 --direct=1 --rw=$io --bs=$bs --size=2G --iodepth=$threads --ioengine=libaio --runtime=60 --group_reporting --name=file1 --output=fio_${io}_${bs}_${threads}
>
> .... is acceptable, e.g.
> fio_write_4m_16 795 MB/s
> fio_randwrite_8m_128 717 MB/s
> fio_randwrite_8m_16 714 MB/s
> fio_randwrite_2m_32 692 MB/s
>
>
> But, the write IOPS seems to be limited around 19k ...
> RBD 4M 64k (= optimal_io_size)
> fio_randread_512_128 53286 55925
> fio_randread_4k_128 51110 44382
> fio_randread_8k_128 30854 29938
> fio_randwrite_512_128 18888 2386
> fio_randwrite_512_64 18844 2582
> fio_randwrite_8k_64 17350 2445
> (...)
> fio_read_4k_128 10073 53151
> fio_read_4k_64 9500 39757
> fio_read_4k_32 9220 23650
> (...)
> fio_read_4k_16 9122 14322
> fio_write_4k_128 2190 14306
> fio_read_8k_32 706 13894
> fio_write_4k_64 2197 12297
> fio_write_8k_64 3563 11705
> fio_write_8k_128 3444 11219
>
>
> Any hints for tuning the IOPS (read and/or write) would be appreciated.
>
> How can I set the variables when the Journal data have go to the OSD ? (after X seconds and/or when Y %-full)
>
>
> Kind Regards,
> -Dieter
>
>
>
> --
>
> --
>
>
>
>
>
> Alexandre D e rumier
>
> Ingénieur Systèmes et Réseaux
>
>
> Fixe : 03 20 68 88 85
>
> Fax : 03 20 68 90 88
>
>
> 45 Bvd du Général Leclerc 59100 Roubaix
> 12 rue Marivaux 75002 Paris
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--
--
Alexandre D e rumier
Ingénieur Systèmes et Réseaux
Fixe : 03 20 68 88 85
Fax : 03 20 68 90 88
45 Bvd du Général Leclerc 59100 Roubaix
12 rue Marivaux 75002 Paris
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