[Ocfs2-users] 10 Node OCFS2 Cluster - Performance
Laurence Mayer
laurence at istraresearch.com
Tue Sep 15 11:00:24 PDT 2009
No, I have 2 NICS in each Server.
1) Dedicated ISCSI
2) Public Network and 02CB
On Tue, Sep 15, 2009 at 8:58 PM, Sunil Mushran <sunil.mushran at oracle.com>wrote:
> Is the o2cb interconnect and iscsi sharing the same network channel?
>
> Laurence Mayer wrote:
>
>> *1 x Node*:
>> root at n1 <mailto:root at n1>:~# dd if=/dev/sdc1 of=/dev/null bs=1M count=1000
>> skip=2000
>> 1000+0 records in
>> 1000+0 records out
>> 1048576000 bytes (1.0 GB) copied, 10.9246 s, 96.0 MB/s
>> *2 x Nodes*
>> root at n1:/cfs1/laurence <mailto:root at n1:/cfs1/laurence># cat
>> run.sh.e7470.1
>> 1000+0 records in
>> 1000+0 records out
>> 1048576000 bytes (1.0 GB) copied, 18.6313 s, 56.3 MB/s
>> root at n1:/cfs1/laurence <mailto:root at n1:/cfs1/laurence># cat
>> run.sh.e7470.2
>>
>> 1000+0 records in
>> 1000+0 records out
>> 1048576000 bytes (1.0 GB) copied, 19.0982 s, 54.9 MB/s
>> real 0m21.557s
>> user 0m0.010s
>> sys 0m0.000s
>> *5 x Nodes*
>> run.sh.e7471.1:1048576000 bytes (1.0 GB) copied, 45.7561 s, 22.9 MB/s
>> run.sh.e7471.2:1048576000 bytes (1.0 GB) copied, 43.3075 s, 24.2 MB/s
>> run.sh.e7471.3:1048576000 bytes (1.0 GB) copied, 38.9945 s, 26.9 MB/s
>> run.sh.e7471.4:1048576000 bytes (1.0 GB) copied, 43.535 s, 24.1 MB/s
>> run.sh.e7471.5:1048576000 bytes (1.0 GB) copied, 41.4462 s, 25.3 MB/s
>> real 0m49.552s
>> user 0m0.000s
>> sys 0m0.010s
>> *8 x Nodes:*
>> run.sh.e7472.1:1048576000 bytes (1.0 GB) copied, 60.7164 s, 17.3 MB/s
>> run.sh.e7472.2:1048576000 bytes (1.0 GB) copied, 50.3527 s, 20.8 MB/s
>> run.sh.e7472.3:1048576000 bytes (1.0 GB) copied, 57.4285 s, 18.3 MB/s
>> run.sh.e7472.4:1048576000 bytes (1.0 GB) copied, 47.4362 s, 22.1 MB/s
>> run.sh.e7472.5:1048576000 bytes (1.0 GB) copied, 61.4835 s, 17.1 MB/s
>> run.sh.e7472.6:1048576000 bytes (1.0 GB) copied, 48.5347 s, 21.6 MB/s
>> run.sh.e7472.7:1048576000 bytes (1.0 GB) copied, 63.9391 s, 16.4 MB/s
>> run.sh.e7472.8:1048576000 bytes (1.0 GB) copied, 60.6223 s, 17.3 MB/s
>> real 1m7.497s
>> user 0m0.010s
>> sys 0m0.010s
>> *10 x Nodes:*
>> run.sh.e7473.1:1048576000 bytes (1.0 GB) copied, 58.4126 s, 18.0 MB/s
>> run.sh.e7473.10:1048576000 bytes (1.0 GB) copied, 50.982 s, 20.6 MB/s
>> run.sh.e7473.2:1048576000 bytes (1.0 GB) copied, 53.1949 s, 19.7 MB/s
>> run.sh.e7473.3:1048576000 bytes (1.0 GB) copied, 48.3755 s, 21.7 MB/s
>> run.sh.e7473.4:1048576000 bytes (1.0 GB) copied, 60.8544 s, 17.2 MB/s
>> run.sh.e7473.5:1048576000 bytes (1.0 GB) copied, 59.9801 s, 17.5 MB/s
>> run.sh.e7473.6:1048576000 bytes (1.0 GB) copied, 61.6221 s, 17.0 MB/s
>> run.sh.e7473.7:1048576000 bytes (1.0 GB) copied, 59.2011 s, 17.7 MB/s
>> run.sh.e7473.8:1048576000 bytes (1.0 GB) copied, 56.3118 s, 18.6 MB/s
>> run.sh.e7473.9:1048576000 bytes (1.0 GB) copied, 54.2202 s, 19.3 MB/s
>> real 1m6.979s
>> user 0m0.010s
>> sys 0m0.010s
>> Do you think the hardware cannot handle the load?
>>
>> On Tue, Sep 15, 2009 at 7:53 PM, Sunil Mushran <
>> sunil.mushran at oracle.com <mailto:sunil.mushran at oracle.com>> wrote:
>>
>> All clusters are running release tests. So not at the moment.
>>
>> But you can see if your hardware is limiting you.
>>
>> # time dd if=/dev/sdX1 of=/dev/null bs=1M count=1000 skip=2000
>>
>> Run this on one node, then two nodes concurrently, 5 nodes, 10 nodes.
>> The idea is to see whether you see any drop off in read performance
>> when multiple nodes are hitting the iscsi io stack.
>>
>> # echo 3 > /proc/sys/vm/drop_caches
>> Do remember to clear the caches between runs.
>>
>> Sunil
>>
>>
>> Laurence Mayer wrote:
>>
>> Hi Sunil
>> I am running iostat on only one of the nodes, so the results
>> you see is only from a single node.
>> However I am running this concurrently on the 10 nodes,
>> resulting in a total of 2Gig being written, so yes on this node
>> it took 8 secs to write 205Megs.
>>
>> My latest results (using sync after the dd) show that when
>> running on the 10 nodes concurrently it take 37secs
>> to write the 10 x 205Meg files (2Gig),
>> Here are the results from ALL the nodes:
>> run.sh.e7212.1:204800000 bytes (205 MB) copied, 17.9657 s,
>> 11.4 MB/s
>> run.sh.e7212.10:204800000 bytes (205 MB) copied, 30.1489 s,
>> 6.8 MB/s
>> run.sh.e7212.2:204800000 bytes (205 MB) copied, 16.4605 s,
>> 12.4 MB/s
>> run.sh.e7212.3:204800000 bytes (205 MB) copied, 18.1461 s,
>> 11.3 MB/s
>> run.sh.e7212.4:204800000 bytes (205 MB) copied, 20.9716 s, 9.8
>> MB/s
>> run.sh.e7212.5:204800000 bytes (205 MB) copied, 22.6265 s, 9.1
>> MB/s
>> run.sh.e7212.6:204800000 bytes (205 MB) copied, 12.9318 s,
>> 15.8 MB/s
>> run.sh.e7212.7:204800000 bytes (205 MB) copied, 15.1739 s,
>> 13.5 MB/s
>> run.sh.e7212.8:204800000 bytes (205 MB) copied, 13.8953 s,
>> 14.7 MB/s
>> run.sh.e7212.9:204800000 bytes (205 MB) copied, 29.5445 s, 6.9
>> MB/s
>>
>> real 0m37.920s
>> user 0m0.000s
>> sys 0m0.030s
>>
>> (This averages 11.17MB/sec per node, which seems very low.)
>>
>> compared to 23.5secs when writing 2Gig from a single node.
>>
>> root at n2:# time (dd if=/dev/zero of=txt bs=2048000 count=1000;
>> sync)
>> 1000+0 records in
>> 1000+0 records out
>> 2048000000 bytes (2.0 GB) copied, 16.1369 s, 127 MB/s
>>
>> real 0m23.495s
>> user 0m0.000s
>> sys 0m15.180s
>>
>>
>> Sunil, do you have any way to run the same test (10 x 200Megs)
>> concurrently on 10 or more nodes to compare results?
>>
>> Thanks again
>>
>> Laurence
>>
>>
>> Sunil Mushran wrote:
>>
>> Always cc ocfs2-users.
>>
>> Strange. The ocfs2 numbers look incomplete. It shows only
>> 200MB written.
>> You said it was taking 16 secs. Yet the iostat numbers are
>> for 8 secs only.
>>
>> The xfs numbers look complete. Shows 90+ MB/s.
>>
>> On my iscsi setup (netapp backend, gige, node with single
>> cpu box and
>> 512M RAM), I get 85MB/s.
>>
>> # time (dd if=/dev/zero of=/mnt/boq7 count=2000 bs=1M ;
>> sync ;)
>> sync
>> 2000+0 records in
>> 2000+0 records out
>> 2097152000 bytes (2.1 GB) copied, 24.4168 seconds, 85.9 MB/s
>>
>> real 0m24.515s
>> user 0m0.035s
>> sys 0m14.967s
>>
>> This is with data=writeback.
>>
>> The 2.2 secs is probably because of delayed allocation.
>> Since your box has
>> enough memory, xfs can cache all the writes and return to
>> the user. Its
>> writeback then flushes the data in the background. The
>> iostat/vmstat
>> numbers should show similar writeback numbers.
>>
>> Sunil
>>
>> Laurence Mayer wrote:
>>
>> iostat from cfs volume
>> avg-cpu: %user %nice %system %iowait %steal %idle
>> 0.00 0.00 1.77 2.28 0.00 95.95
>>
>> Device: rrqm/s wrqm/s r/s w/s
>> rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util
>> sdc 0.00 4.00 2.00 4.00
>> 16.00 64.00 13.33 0.12 15.00 15.00 9.00
>>
>> avg-cpu: %user %nice %system %iowait %steal %idle
>> 0.00 0.00 6.90 7.14 0.00 85.96
>>
>> Device: rrqm/s wrqm/s r/s w/s
>> rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util
>> sdc 0.00 16.00 9.00 40.00
>> 75.00 441.00 10.53 0.43 9.39 6.73 33.00
>>
>> avg-cpu: %user %nice %system %iowait %steal %idle
>> 0.00 0.00 7.67 7.18 0.00 85.15
>>
>> Device: rrqm/s wrqm/s r/s w/s
>> rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util
>> sdc 0.00 20.00 11.00 47.00
>> 88.00 536.00 10.76 0.36 6.21 4.48 26.00
>>
>> avg-cpu: %user %nice %system %iowait %steal %idle
>> 0.00 0.00 5.65 10.07 0.00 84.28
>>
>> Device: rrqm/s wrqm/s r/s w/s
>> rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util
>> sdc 0.00 16.00 9.00 37.00
>> 75.00 417.00 10.70 0.55 11.96 8.48 39.00
>>
>> avg-cpu: %user %nice %system %iowait %steal %idle
>> 0.25 0.00 12.69 31.22 0.00 55.84
>>
>> Device: rrqm/s wrqm/s r/s w/s
>> rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util
>> sdc 0.00 40324.00 2.00 181.00
>> 16.00 174648.00 954.45 94.58 364.86 4.81 88.00
>>
>> avg-cpu: %user %nice %system %iowait %steal %idle
>> 0.00 0.00 13.35 14.14 0.00 72.51
>>
>> Device: rrqm/s wrqm/s r/s w/s
>> rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util
>> sdc 0.00 9281.00 1.00 228.00
>> 11.00 224441.00 980.14 100.93 559.17 4.37 100.00
>>
>> avg-cpu: %user %nice %system %iowait %steal %idle
>> 0.00 0.00 0.25 0.50 0.00 99.25
>>
>> Device: rrqm/s wrqm/s r/s w/s
>> rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util
>> sdc 0.00 0.00 0.00 3.00
>> 0.00 1040.00 346.67 0.03 240.00 6.67 2.00
>>
>> avg-cpu: %user %nice %system %iowait %steal %idle
>> 0.00 0.00 0.00 0.00 0.00 100.00
>>
>> Device: rrqm/s wrqm/s r/s w/s
>> rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util
>> sdc 0.00 0.00 1.00 1.00
>> 11.00 1.00 6.00 0.04 20.00 20.00 4.00
>>
>> vmstat from cfs volume:
>> procs -----------memory---------- ---swap--
>> -----io---- -system-- ----cpu----
>> r b swpd free buff cache si so bi
>> bo in cs us sy id wa
>> 0 0 0 447656 279416 15254408 0 0 0
>> 0 39 350 0 0 100 0
>> 0 0 0 447656 279416 15254408 0 0 5
>> 21 61 358 0 0 100 0
>> 0 0 0 447656 279416 15254408 0 0 0
>> 0 49 369 0 0 100 0
>> 0 0 0 447656 279416 15254408 0 0 6
>> 0 28 318 0 0 100 0
>> 0 0 0 447656 279416 15254408 0 0 0
>> 0 26 321 0 0 100 0
>> 0 0 0 447656 279416 15254408 0 0 5
>> 1 45 339 0 0 100 0
>> 0 0 0 447656 279416 15254412 0 0 0
>> 0 8 283 0 0 100 0
>> 0 1 0 439472 279424 15262604 0 0 14
>> 80 93 379 0 1 90 9
>> 0 0 0 439472 279424 15262604 0 0 0
>> 4 43 338 0 0 97 2
>> 0 0 0 382312 279456 15319964 0 0 37
>> 209 208 562 0 7 85 8
>> 0 0 0 324524 279500 15377292 0 0 44
>> 264 250 647 0 7 86 7
>> 0 0 0 266864 279532 15434636 0 0 38
>> 208 213 548 0 7 83 10
>> 0 3 0 250072 279544 15450584 0 0 44
>> 124832 13558 2038 0 11 62 27
>> 0 1 0 250948 279564 15450584 0 0 5
>> 75341 19596 2735 0 13 71 16
>> 0 0 0 252808 279564 15450548 0 0 0
>> 52 2777 849 0 2 95 3
>> 0 0 0 252808 279564 15450548 0 0 6
>> 0 21 310 0 0 100 0
>> 0 0 0 252808 279564 15450548 0 0 0
>> 0 15 298 0 0 100 0
>> 0 0 0 253012 279564 15450548 0 0 5
>> 1 29 310 0 0 100 0
>> 0 0 0 253048 279564 15450552 0 0 0
>> 0 19 290 0 0 100 0
>> 0 0 0 253048 279564 15450552 0 0 6
>> 0 26 305 0 0 100 0
>> 1 0 0 253172 279564 15450552 0 0 0
>> 60 28 326 0 0 100 0
>> xfs volume:
>> iostat
>> Device: rrqm/s wrqm/s r/s w/s
>> rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util
>> sdd 0.00 0.00 4.00 0.00
>> 40.00 0.00 10.00 0.05 12.00 12.00 4.80
>> avg-cpu: %user %nice %system %iowait %steal %idle
>> 0.00 0.00 14.98 0.25 0.00 84.77
>> Device: rrqm/s wrqm/s r/s w/s
>> rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util
>> sdd 0.00 0.00 3.00 5.00
>> 24.00 3088.00 389.00 6.54 44.00 17.00 13.60
>> avg-cpu: %user %nice %system %iowait %steal %idle
>> 0.00 0.00 10.67 21.86 0.00 67.47
>> Device: rrqm/s wrqm/s r/s w/s
>> rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util
>> sdd 0.00 1.00 0.00 221.00
>> 0.00 202936.00 918.26 110.51 398.39 4.52 100.00
>> avg-cpu: %user %nice %system %iowait %steal %idle
>> 0.00 0.00 4.92 21.84 0.00 73.23
>> Device: rrqm/s wrqm/s r/s w/s
>> rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util
>> sdd 0.00 2.00 0.00 232.00
>> 0.00 209152.00 901.52 110.67 493.50 4.31 100.00
>> avg-cpu: %user %nice %system %iowait %steal %idle
>> 0.00 0.00 3.67 22.78 0.00 73.54
>> Device: rrqm/s wrqm/s r/s w/s
>> rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util
>> sdd 0.00 1.00 0.00 215.00
>> 0.00 185717.00 863.80 111.37 501.67 4.65 100.00
>> avg-cpu: %user %nice %system %iowait %steal %idle
>> 0.12 0.00 6.24 12.61 0.00 81.02
>> Device: rrqm/s wrqm/s r/s w/s
>> rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util
>> sdd 0.00 1.00 0.00 200.00
>> 0.00 178456.00 892.28 80.01 541.82 4.88 97.60
>> avg-cpu: %user %nice %system %iowait %steal %idle
>> 0.12 0.00 4.61 8.34 0.00 86.92
>> Device: rrqm/s wrqm/s r/s w/s
>> rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util
>> sdd 0.00 0.00 0.00 179.00
>> 0.00 183296.00 1024.00 134.56 470.61 5.21 93.20
>> avg-cpu: %user %nice %system %iowait %steal %idle
>> 0.00 0.00 4.25 9.96 0.00 85.79
>> Device: rrqm/s wrqm/s r/s w/s
>> rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util
>> sdd 0.00 0.00 0.00 201.00
>> 0.00 205824.00 1024.00 142.86 703.92 4.98 100.00
>> vmstat
>> procs -----------memory---------- ---swap--
>> -----io---- -system-- ----cpu----
>> r b swpd free buff cache si so bi
>> bo in cs us sy id wa
>> 1 0 45396 214592 6332 31771312 0 0 668
>> 908 3 6 3 2 92 3
>> 0 0 45396 214460 6332 31771336 0 0 0
>> 0 14 4874 0 0 100 0
>> 2 0 45396 161032 6324 31822524 0 0 20
>> 0 42 6074 0 13 87 0
>> 5 1 45396 166380 6324 31820072 0 0 12
>> 77948 8166 6416 0 16 77 7
>> 1 2 45396 163176 6324 31824580 0 0 28
>> 102920 24190 6660 0 6 73 21
>> 0 2 45396 163096 6332 31824580 0 0 0
>> 102743 22576 6700 0 5 72 23
>> 0 2 45396 163076 6332 31824580 0 0 0
>> 90400 21831 6500 0 4 76 21
>> 0 1 45396 163012 6332 31824580 0 0 0
>> 114732 19686 5894 0 7 83 10
>> 0 1 45396 162972 6332 31824580 0 0 0
>> 98304 24882 6314 0 4 87 8
>> 0 1 45396 163064 6332 31824580 0 0 0
>> 98304 24118 6285 0 4 84 12
>> 0 1 45396 163096 6340 31824576 0 0 0
>> 114720 24800 6166 0 4 87 9
>> 0 1 45396 162964 6340 31824584 0 0 0
>> 98304 24829 6105 0 3 85 12
>> 0 1 45396 162856 6340 31824584 0 0 0
>> 98304 23506 6402 0 5 83 12
>> 0 1 45396 162888 6340 31824584 0 0 0
>> 114688 24685 7057 0 4 87 9
>> 0 1 45396 162600 6340 31824584 0 0 0
>> 98304 24902 7107 0 4 86 10
>> 0 1 45396 162740 6340 31824584 0 0 0
>> 98304 24906 7019 0 4 91 6
>> 0 1 45396 162616 6348 31824584 0 0 0
>> 114728 24997 7169 0 4 86 9
>> 0 1 45396 162896 6348 31824584 0 0 0
>> 98304 23700 6857 0 4 85 11
>> 0 1 45396 162732 6348 31824584 0 0 0
>> 94512 24468 6995 0 3 89 8
>> 0 1 45396 162836 6348 31824584 0 0 0
>> 81920 19764 6604 0 7 81 11
>> 0 3 45396 162996 6348 31824584 0 0 0
>> 114691 24303 7270 0 4 81 14
>> procs -----------memory---------- ---swap--
>> -----io---- -system-- ----cpu----
>> r b swpd free buff cache si so bi
>> bo in cs us sy id wa
>> 0 1 45396 163160 6356 31824584 0 0 0
>> 98332 22695 7174 0 4 78 18
>> 0 1 45396 162848 6356 31824584 0 0 0
>> 90549 24836 7347 0 4 82 15
>> 1 0 45396 163092 6364 31824580 0 0 0
>> 37 13990 6216 0 6 83 11
>> 0 0 45396 163272 6364 31824588 0 0 0
>> 320 65 3817 0 0 100 0
>> 0 0 45396 163272 6364 31824588 0 0 0
>> 0 8 3694 0 0 100 0
>> 0 0 45396 163272 6364 31824588 0 0 0
>> 0 25 3833 0 0 100 0
>> 0 0 45396 163272 6364 31824588 0 0 0
>> 1 13 3690 0 0 100 0
>> On Mon, Sep 14, 2009 at 10:15 PM, Sunil
>> Mushran
>> <sunil.mushran at oracle.com
>> <mailto:sunil.mushran at oracle.com>
>> <mailto:sunil.mushran at oracle.com
>> <mailto:sunil.mushran at oracle.com>>> wrote:
>>
>> Add a sync. Both utils are showing very little io.
>> And do the same
>> for runs on both ocfs2 and xfs.
>>
>> # dd if... ; sync;
>>
>> Laurence Mayer wrote:
>>
>> Here is the output of iostat while running the
>> test on all the
>> OCFS volume.
>> avg-cpu: %user %nice %system %iowait
>> %steal %idle
>> 0.23 0.00 15.80 0.45 0.00
>> 83.52
>>
>> Device: rrqm/s wrqm/s r/s w/s
>> rsec/s wsec/s avgrq-sz avgqu-sz await
>> svctm %util
>> sdc 0.00 4.00 5.00 4.00
>> 43.00 57.00 11.11 0.08 8.89
>> 8.89 8.00
>>
>> avg-cpu: %user %nice %system %iowait %steal
>> %idle
>> 0.28 0.00 4.46 0.00 0.00
>> 95.26
>>
>> Device: rrqm/s wrqm/s r/s w/s
>> rsec/s wsec/s avgrq-sz avgqu-sz await
>> svctm %util
>> sdc 0.00 0.00 0.00 0.00
>> 0.00 0.00 0.00 0.00 0.00
>> 0.00 0.00
>>
>> avg-cpu: %user %nice %system %iowait %steal
>> %idle
>> 0.25 0.00 0.25 3.23 0.00
>> 96.28
>>
>> Device: rrqm/s wrqm/s r/s w/s
>> rsec/s wsec/s avgrq-sz avgqu-sz await
>> svctm %util
>> sdc 0.00 7.00 1.00 13.00
>> 11.00 153.00 11.71 0.24 17.14
>> 11.43 16.00
>>
>> avg-cpu: %user %nice %system %iowait %steal
>> %idle
>> 0.00 0.00 0.00 0.00 0.00
>> 100.00
>>
>> Device: rrqm/s wrqm/s r/s w/s
>> rsec/s wsec/s avgrq-sz avgqu-sz await
>> svctm %util
>> sdc 0.00 0.00 0.00 0.00
>> 0.00 0.00 0.00 0.00 0.00
>> 0.00 0.00
>>
>> avg-cpu: %user %nice %system %iowait %steal
>> %idle
>> 0.00 0.00 0.00 0.00 0.00
>> 100.00
>>
>> Device: rrqm/s wrqm/s r/s w/s
>> rsec/s wsec/s avgrq-sz avgqu-sz await
>> svctm %util
>> sdc 0.00 0.00 1.00 1.00
>> 11.00 1.00 6.00 0.03 15.00
>> 15.00 3.00
>>
>> vmstat:
>> procs -----------memory---------- ---swap--
>> -----io----
>> -system-- ----cpu----
>> r b swpd free buff cache si so
>> bi bo in cs us sy id wa
>> 0 0 0 54400 279320 15651312 0 0
>> 9 8 2
>> 4 30 1 69 0
>> 0 0 0 54384 279320 15651316 0 0
>> 6 0 24
>> 299 0 0 100 0
>> 0 0 0 54384 279320 15651316 0 0
>> 0 0 92
>> 409 0 0 100 0
>> 2 0 0 54384 279320 15651316 0 0
>> 5 1 81
>> 386 0 0 100 0
>> 0 0 0 53756 279320 15651352 0 0
>> 8 0 730
>> 1664 0 1 99 0
>> 0 0 0 53232 279320 15651352 0 0
>> 6 88 586
>> 1480 0 0 99 0
>> 0 0 0 242848 279320 15458608 0 0
>> 8 0 348
>> 1149 0 3 97 0
>> 0 0 0 242868 279320 15458608 0 0
>> 5 1 220
>> 721 0 0 100 0
>> 0 0 0 242868 279320 15458608 0 0
>> 0 0 201
>> 709 0 0 100 0
>> 0 0 0 243116 279320 15458608 0 0
>> 6 0 239
>> 775 0 0 100 0
>> 0 0 0 243116 279320 15458608 0 0
>> 0 0 184
>> 676 0 0 100 0
>> 0 0 0 243116 279336 15458608 0 0
>> 5 65 236
>> 756 0 0 99 0
>> 0 0 0 243488 279336 15458608 0 0
>> 0 0 231
>> 791 0 0 100 0
>> 1 0 0 243488 279336 15458608 0 0
>> 6 0 193
>> 697 0 1 100 0
>> 0 0 0 243488 279336 15458608 0 0
>> 0 0 221
>> 762 0 0 100 0
>> 0 0 0 243860 279336 15458608 0 0
>> 9 1 240
>> 793 0 0 100 0
>> 0 0 0 243860 279336 15458608 0 0
>> 0 0 197
>> 708 0 0 100 0
>> 1 0 0 117384 279348 15585384 0 0
>> 26 16 124
>> 524 0 15 84 1
>> 0 0 0 53204 279356 15651364 0 0
>> 0 112 141
>> 432 0 8 91 1
>> 0 0 0 53212 279356 15651320 0 0
>> 5 1 79
>> 388 0 0 100 0
>> 0 0 0 53212 279356 15651320 0 0
>> 0 20 30
>> 301 0 0 100 0
>> Does this give you any clue to the bottle neck?
>> On Mon, Sep 14, 2009 at 9:42 PM,
>> Sunil Mushran
>> <sunil.mushran at oracle.com
>> <mailto:sunil.mushran at oracle.com>
>> <mailto:sunil.mushran at oracle.com
>> <mailto:sunil.mushran at oracle.com>>
>> <mailto:sunil.mushran at oracle.com
>> <mailto:sunil.mushran at oracle.com>
>> <mailto:sunil.mushran at oracle.com
>> <mailto:sunil.mushran at oracle.com>>>> wrote:
>>
>> Get some iostat/vmstat numbers.
>> # iostat -x /dev/sdX 1
>> # vmstat 1
>>
>> How much memory do the nodes have? If more
>> than 2G, XFS
>> is probably leveraging its delayed
>> allocation feature to
>> heavily
>> cache the writes. iostat/vmstat should show
>> that.
>>
>> Is the timing for the 10 node test cumulative?
>>
>> Laurence Mayer wrote:
>>
>> Hi,
>>
>> I am currently running a 10 Node OCFS2
>> Cluster (version
>> 1.3.9-0ubuntu1) on Ubuntu Server 8.04
>> x86_64.
>> Linux n1 2.6.24-24-server #1 SMP Tue Jul
>> 7 19:39:36 UTC
>> 2009
>> x86_64 GNU/Linux
>>
>> The Cluster is connected to a 1Tera
>> iSCSI Device
>> presented by
>> an IBM 3300 Storage System, running over
>> a 1Gig Network.
>> Mounted on all nodes: /dev/sdc1 on
>> /cfs1 type ocfs2
>> (rw,_netdev,data=writeback,heartbeat=local)
>> Maximum Nodes: 32
>> Block Size=4k
>> Cluster Size=4k
>>
>> My testing shows that to write
>> simultaneously from the 10
>> nodes, 10 x 200Meg files (1 file per
>> node, total of 2Gig)
>> takes ~23.54secs.
>> Reading the files back can take just as
>> long.
>>
>> Do these numbers sound correct?
>>
>> Doing dd if=/dev/zero of=/cfs1/xxxxx/txt
>> count=1000
>> bs=2048000
>> (2Gig) from a single node takes 16secs.
>>
>> (running the same dd command on an XFS
>> filesystem
>> connected to
>> the same iSCSI Storage takes 2.2secs)
>>
>> Is there any tips & tricks to improve
>> performance on OCFS2?
>>
>> Thanks in advance
>> Laurence
>>
>>
>> _______________________________________________
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>> Ocfs2-users at oss.oracle.com
>> <mailto:Ocfs2-users at oss.oracle.com>
>> <mailto:Ocfs2-users at oss.oracle.com
>> <mailto:Ocfs2-users at oss.oracle.com>>
>> <mailto:Ocfs2-users at oss.oracle.com
>> <mailto:Ocfs2-users at oss.oracle.com>
>> <mailto:Ocfs2-users at oss.oracle.com
>> <mailto:Ocfs2-users at oss.oracle.com>>>
>>
>>
>> http://oss.oracle.com/mailman/listinfo/ocfs2-users
>>
>>
>>
>>
>>
>
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