Hi Henry,
Thanks for your suggestion! We'll try it. :)
Hopefully come out with good result! Thank you.
Best Regards,
Anny
2011/5/17 Henry C Chang <henry.cy.chang@xxxxxxxxx>:
> Hi Anny,
>
> As Jeff mentioned, you need to add the following option for iozone testing:
> -e: include flush in the timing calculation to remedy the cache effect
>
> and may add:
> -n: set the minimum size for auto mode (e.g., -n 256M) to skip testing
> of small file sizes
>
> and drop -z if you want to omit testing small record sizes. (starting
> from 64K instead of 4K)
>
> --
> Henry
>
>
> 2011/5/18 Jeff Wu <cpwu@xxxxxxxxxxxxx>:
>>
>> Hi AnnyRen,
>>
>> with the test results , run a 1G data at your ceph cluster ,
>> should be about 100M/sec.
>> maybe,iozone test results didn't include iozone flush time.
>>
>> Could you list your hardware platform infos ?
>> network:1G,4G,8G,FC ...?,cpu,memory:size ? ,disk:PATA,SATA,SAS,SSD ??
>> and
>> could you try other iozone commands ,for instance :
>>
>> 1)
>> add "-e" param to include flush(fsync,fflush) in the timing
>> calculations.
>>
>> /usr/bin/iozone -azcR -e -f /mnt/ceph/test0516.dbf \
>> -g 1G -b /exceloutput0516.xls
>>
>> 2)run a large data which size is your host memory size*2:
>>
>> $./iozone -z -c -e -a -n 512M -g {memory_size}*2M -i 0 -i 1 -i 2 \
>> -f /mnt/ceph/fio -Rb ./iozone.xls
>>
>> or
>> 2)
>> !/bin/sh
>>
>> for i in 32 64 128 256
>> do
>> ./iozone -r ${i}k -t 10 -s 4096M -i 0 -i 1 -i 2 \
>> -F /mnt/ceph/F1 /mnt/ceph/F2 /mnt/ceph/F3 /mnt/ceph/F4 /mnt/ceph/F5 /mnt/ceph/F6 /mnt/ceph/F7 /mnt/ceph/F8 /mnt/ceph/F9 /mnt/ceph/F10
>> done
>>
>>
>>
>>
>> Jeff
>>
>>
>>
>>
>>
>>
>> On Tue, 2011-05-17 at 15:34 +0800, AnnyRen wrote:
>>> Hi, Jeff:
>>>
>>> I run "ceph osd tell osd_num bench" with 1 times per osd
>>>
>>> and use ceph -w to observe every osd performance,
>>>
>>> osd0: [INF] bench: wrote 1024 MB in blocks of 4096 KB in 10.875844
>>> sec at 96413 KB/sec
>>> osd1: [INF] bench: wrote 1024 MB in blocks of 4096 KB in 11.784985
>>> sec at 88975 KB/sec
>>> osd2: [INF] bench: wrote 1024 MB in blocks of 4096 KB in 11.161067
>>> sec at 93949 KB/sec
>>> osd3: [INF] bench: wrote 1024 MB in blocks of 4096 KB in 10.798796
>>> sec at 97101 KB/sec
>>> osd4: [INF] bench: wrote 1024 MB in blocks of 4096 KB in 14.437141
>>> sec at 72630 KB/sec
>>> osd5: [INF] bench: wrote 1024 MB in blocks of 4096 KB in 14.451444
>>> sec at 72558 KB/sec
>>> osd6: [INF] bench: wrote 1024 MB in blocks of 4096 KB in 11.083872
>>> sec at 94603 KB/sec
>>> osd7: [INF] bench: wrote 1024 MB in blocks of 4096 KB in 11.062728
>>> sec at 94784 KB/sec
>>> osd8: [INF] bench: wrote 1024 MB in blocks of 4096 KB in 14.137312
>>> sec at 74170 KB/sec
>>> osd9: [INF] bench: wrote 1024 MB in blocks of 4096 KB in 13.489992
>>> sec at 77729 KB/sec
>>>
>>>
>>> and I run
>>> root@MDS2:/mnt/ceph# rados bench 60 write -p data
>>>
>>> the result is
>>>
>>> Total time run: 60.553247
>>> Total writes made: 1689
>>> Write size: 4194304
>>> Bandwidth (MB/sec): 111.571
>>>
>>> Average Latency: 0.573209
>>> Max latency: 2.25691
>>> Min latency: 0.218494
>>>
>>>
>>>
>>> 2011/5/17 Jeff Wu <cpwu@xxxxxxxxxxxxx>:
>>> > Hi AnnyRen
>>> >
>>> > Could you run the following commands and give us the test results?
>>> >
>>> > $ceph osd tell OSD-N bench // OSD-N : osd number : 0,1,2 ....
>>> > $ceph -w
>>> >
>>> > $rados bench 60 write -p data // refer to "rados -h "
>>> >
>>> > Jeff
>>> >
>>> >
>>> >
>>> > On Tue, 2011-05-17 at 11:53 +0800, AnnyRen wrote:
>>> >> I'm running iozone on EXT4 with Ceph v0.26.
>>> >> But I got the weird result, most write performance exceed 1GB/s, even
>>> >> up to 3GB/s
>>> >> I think it's not normal to get the performance outpupt.
>>> >>
>>> >> Command line I used is: /usr/bin/iozone -azcR -f
>>> >> /mnt/ceph/test0516.dbf -g 1G -b /exceloutput0516.xls
>>> >> Attachment is the output file...
>>> >>
>>> >> and my environment is composed of 15 physical machines with
>>> >>
>>> >> 3 MON, 2MDS (1 active, 1 standby), 10 OSD (1 osd daemon (3T) /host)
>>> >> EXT4 format
>>> >> data replication size: 3
>>> >>
>>> >>
>>> >>
>>> >> "Writer report"
>>> >> "4" "8" "16" "32" "64" "128" "256" "512" "1024"
>>> >> "2048" "4096" "8192" "16384"
>>> >> "64" 983980 1204796 1210227 1143223 1357066
>>> >> "128" 1007629 1269781 1406136 1391557 1436229 1521718
>>> >> "256" 1112909 1430119 1523457 1652404 1514860 1639786 1729594
>>> >> "512" 1150351 1475116 1605228 1723770 1797349 1712772 1783912 1854787
>>> >> "1024" 1213334 1471481 1679160 1828574 1888889 1899750 1885572
>>> >> 1865912 1875690
>>> >> "2048" 1229274 1540849 1708146 1843410 1903457 1980705 1930406
>>> >> 1913634 1906837 1815744
>>> >> "4096" 1213284 1528348 1674646 1762434 1872096 1882352 1881528
>>> >> 1903416 1897949 1835102 1731177
>>> >> "8192" 204560 155186 572387 238548 186597 429036 187327
>>> >> 157205 553771 416512 299810 405842
>>> >> "16384" 699749 559255 687450 541030 828776 555296 742561
>>> >> 525483 604910 452423 564557 670539 970616
>>> >> "32768" 532414 829610 812215 879441 863159 864794 865938
>>> >> 804951 916352 879582 608132 860732 1239475
>>> >> "65536" 994824 1096543 1095791 1317968 1280277 1390267 1259868
>>> >> 1205214 1339111 1346927 1267888 863234 1190221
>>> >> "131072" 1063429 1165115 1102650 1554828 1182128 1185731
>>> >> 1190752 1195792 1277441 1211063 1237567 1226999 1336961
>>> >> "262144" 1280619 1368554 1497837 1633397 1598255 1609212
>>> >> 1607504 1665019 1590515 1548307 1591258 1505267 1625679
>>> >> "524288" 1519583 1767928 1738523 1883151 2011216 1993877
>>> >> 2023543 1867440 2106124 2055064 1906668 1778645 1838988
>>> >> "1048576" 1580851 1887530 2044131 2166133 2236379 2283578
>>> >> 2257454 2296612 2271066 2101274 1905829 1605923 2158238
>>> >>
>>> >>
>>> >>
>>> >> "Reader report"
>>> >> "4" "8" "16" "32" "64" "128" "256" "512" "1024"
>>> >> "2048" "4096" "8192" "16384"
>>> >> "64" 1933893 2801873 3057153 3363612 3958892
>>> >> "128" 2286447 3053774 2727923 3468030 4104338 4557257
>>> >> "256" 2903529 3236056 3245838 3705040 3654598 4496299 5117791
>>> >> "512" 2906696 3437042 3628697 3431550 4871723 4296637 6246213 6395018
>>> >> "1024" 3229770 3483896 4609294 3791442 4614246 5536137 4550690
>>> >> 5048117 4966395
>>> >> "2048" 3554251 4310472 3885431 4096676 6401772 4842658 5080379
>>> >> 5184636 5596757 5735012
>>> >> "4096" 3416292 4691638 4321103 5728903 5475122 5171846 4819300
>>> >> 5258919 6408472 5044289 4079948
>>> >> "8192" 3233004 4615263 4536055 5618186 5414558 5025700 5553712
>>> >> 4926264 5634770 5281396 4659702 3652258
>>> >> "16384" 3141058 3704193 4567654 4395850 4568869 5387732
>>> >> 4436432 5808029 5578420 4675810 3913007 3911225 3961277
>>> >> "32768" 3704273 4598957 4088278 5133719 5896692 5537024
>>> >> 5234412 5398271 4942992 4118662 3729099 3511757 3481511
>>> >> "65536" 4131091 4210184 5341188 4647619 6077765 5852474
>>> >> 5379762 5259330 5488249 5246682 4342682 3549202 3286487
>>> >> "131072" 3582876 5251082 5332216 5269908 5303512 5574440
>>> >> 5635064 5796372 5406363 4958839 4435918 3673443 3647874
>>> >> "262144" 3659283 4551414 5746231 5433824 5876196 6011650
>>> >> 5552000 5629260 5298830 4982226 4628902 4065823 3421924
>>> >> "524288" 3905973 5488778 5219963 6047356 5916811 6180455
>>> >> 5495733 5925628 5637512 5537123 3517132 3550861 3047013
>>> >> "1048576" 3855595 5634571 5410298 6001809 6464713 6299610
>>> >> 5894249 5516031 5800161 5209203 4295840 3724983 3641623
>>> >
>>> >
>>
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