Thanks
>> 8x SSD, 200GB each
20000 iops seem pretty low,no ?
for @intank:
Is their a bottleneck somewhere in ceph ?
I said that, because I would like to know if it's scale by adding new nodes.
Does Intank have already done some random iops benchmark ? (I always see sequential throughput bench in the mailing list)
----- Mail original -----
De: "Dieter Kasper" <d.kasper@xxxxxxxxxxxx>
À: "Alexandre DERUMIER" <aderumier@xxxxxxxxx>
Cc: ceph-devel@xxxxxxxxxxxxxxx
Envoyé: Jeudi 30 Août 2012 17:33:42
Objet: Re: RBD performance - tuning hints
On Thu, Aug 30, 2012 at 05:28:02PM +0200, Alexandre DERUMIER wrote:
> Thanks for the report !
>
> vs your first benchmark, it's with RBD 4M or 64K ?
with 4MB (see attached config info)
Cheers,
-Dieter
>
> (how much ssd by node?)
8x SSD, 200GB each
>
>
>
> ----- 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
> > --
> > 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
>
>
>
>
> --
>
> --
>
>
>
>
>
> 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
>
--
--
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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