[Gluster-users] Slow read performance
Thomas Wakefield
twake at cola.iges.org
Wed Feb 27 20:56:35 UTC 2013
I have tested everything, small and large files. I have used file sizes ranging from 128k up to multiple GB files. All the reads are bad.
Here is a fairly exhaustive iozone auto test:
random random bkwd record stride
KB reclen write rewrite read reread read write read rewrite read fwrite frewrite fread freread
64 4 40222 63492 26868 30060 1620 71037 1572 70570 31294 77096 72475 14736 13928
64 8 99207 116366 13591 13513 3214 97690 3155 109978 28920 152018 158480 18936 17625
64 16 230257 253766 25156 28713 10867 223732 8873 244297 54796 303383 312204 15062 13545
64 32 255943 234481 5735102 7100397 11897 318502 13681 347801 24214 695778 528618 25838 28094
64 64 214096 681644 6421025 7100397 27453 292156 28117 621657 27338 376062 512471 28569 32534
128 4 74329 75468 26428 41089 1131 72857 1118 66976 1597 73778 78343 13351 13026
128 8 100862 135170 24966 16734 2617 118966 2560 120406 39156 125121 146613 16177 16180
128 16 115114 253983 28212 17854 5307 246180 5431 229843 47335 255920 271173 27256 24445
128 32 256042 391360 39848 64258 11329 290230 9905 429563 38176 490380 463696 20917 19219
128 64 248573 592699 4557257 6812590 19583 452366 29263 603357 42967 814915 692017 76327 37604
128 128 921183 526444 5603747 5379161 45614 390222 65441 826202 41384 662962 1040839 78526 39023
256 4 76212 77337 40295 32125 1289 71866 1261 64645 1436 57309 53048 23073 29550
256 8 126922 141976 26237 25130 2566 128058 2565 138981 2985 125060 133603 22840 24955
256 16 242883 263636 41850 24371 4902 250009 5290 248792 89353 243821 247303 26965 26199
256 32 409074 439732 40101 39335 11953 436870 11209 430218 83743 409542 479390 30821 27750
256 64 259935 571502 64840 71847 22537 617161 23383 392047 91852 672010 802614 41673 53111
256 128 847597 812329 185517 83198 49383 708831 44668 794889 74267 1180188 1662639 54303 41018
256 256 481324 709299 5217259 5320671 44668 719277 40954 808050 41302 790209 771473 62224 35754
512 4 77667 75226 35102 29696 1337 66262 1451 67680 1413 69265 69142 42084 27897
512 8 134311 144341 30144 24646 2102 134143 2209 134699 2296 108110 128616 25104 29123
512 16 200085 248787 30235 25697 4196 247240 4179 256116 4768 250003 226436 32351 28455
512 32 330341 439805 26440 39284 8744 457611 8006 424168 125953 425935 448813 27660 26951
512 64 483906 733729 48747 41121 16032 555938 17424 587256 187343 366977 735740 41700 41548
512 128 836636 907717 69359 94921 42443 761031 36828 964378 123165 651383 695697 58368 44459
512 256 520879 860437 145534 135523 40267 847532 31585 663252 69696 1270846 1492545 48822 48092
512 512 782951 973118 3099691 2942541 42328 871966 46218 911184 49791 953248 1036527 52723 48347
1024 4 76218 69362 36431 28711 1137 66171 1174 68938 1125 70566 70845 34942 28914
1024 8 126045 140524 37836 15664 2698 126000 2557 125566 2567 110858 127255 26764 27945
1024 16 243398 261429 40238 23263 3987 246400 3882 260746 4093 236652 236874 31429 25076
1024 32 383109 422076 41731 41605 8277 473441 7775 415261 8588 394765 407306 40089 28537
1024 64 590145 619156 39623 53267 15051 722717 14624 753000 257294 597784 620946 38619 44073
1024 128 1077836 1124099 56192 64916 36851 1102176 37198 1082454 281548 829175 792604 47975 51913
1024 256 941918 1074331 72783 81450 26778 1099636 32395 1060013 183218 1024121 995171 44371 45448
1024 512 697483 1130312 100324 114682 48215 1041758 41480 1058967 90156 994020 1563622 56328 46370
1024 1024 931702 1087111 4609294 4199201 44191 949834 45594 970656 56674 933525 1075676 44876 46115
2048 4 71438 67066 58319 38913 1147 44147 1043 42916 967 66416 67205 45953 96750
2048 8 141926 134567 61101 55445 2596 77528 2564 80402 4258 124211 120747 53888 100337
2048 16 254344 255585 71550 74500 5410 139365 5201 141484 5171 205521 213113 67048 57304
2048 32 397833 411261 56676 80027 10440 260034 10126 230238 10814 391665 383379 79333 60877
2048 64 595167 687205 64262 87327 20772 456430 19960 477064 23190 540220 563096 86812 92565
2048 128 833585 933403 121926 118621 37700 690020 37575 733254 567449 712337 734006 92011 104934
2048 256 799003 949499 143688 125659 40871 892757 37977 880494 458281 836263 901375 131332 110237
2048 512 979936 1040724 120896 138013 54381 859783 48721 780491 279203 1068824 1087085 97886 98078
2048 1024 901754 987938 53352 53043 72727 1054522 68269 992275 181253 1309480 1524983 121600 95585
2048 2048 831890 1021540 4257067 3302797 75672 984203 80181 826209 94278 966920 1027159 111832 105921
4096 4 66195 67316 62171 74785 1328 28963 1329 26397 1223 71470 69317 55903 84915
4096 8 122221 120057 90537 60958 2598 47312 2468 59783 2640 128674 127872 41285 40422
4096 16 238321 239251 29336 32121 4153 89262 3986 96930 4608 229970 237108 55039 56983
4096 32 417110 421356 30974 50000 8382 156676 7886 153841 7900 359585 367288 26611 25952
4096 64 648008 668066 32193 29389 14830 273265 14822 282211 19653 581898 620798 51281 50218
4096 128 779422 848564 55594 60253 37108 451296 35908 491361 37567 738163 728059 67681 66440
4096 256 865623 886986 71368 63947 44255 645961 42689 719491 736707 819696 837641 57059 60347
4096 512 852099 889650 68870 73891 31185 845224 30259 830153 392334 910442 961983 60083 55558
4096 1024 710357 867810 29377 29522 49954 846640 43665 926298 213677 986226 1115445 55130 59205
4096 2048 826479 908420 43191 42075 59684 904022 58601 855664 115105 1418322 1524415 60548 66066
4096 4096 793351 855111 3232454 3673419 66018 861413 48833 847852 45914 852268 842075 42980 48374
8192 4 67340 69421 42198 31740 994 23251 1166 16813 837 73827 73126 25169 29610
8192 8 137150 125622 29131 36439 2051 44342 1988 48930 2315 134183 135367 31080 33573
8192 16 237366 220826 24810 26584 3576 88004 3769 78717 4289 233751 235355 23302 28742
8192 32 457447 454404 31594 27750 8141 142022 7846 143984 9322 353147 396188 34203 33265
8192 64 670645 655259 28630 23255 16669 237476 16965 244968 15607 590365 575320 49998 43305
8192 128 658676 760982 44197 47802 28693 379523 26614 378328 27184 720997 702038 51707 49733
8192 256 643370 698683 56233 63165 28846 543952 27745 576739 44014 701007 725534 59611 58985
8192 512 696884 776793 67258 52705 18711 698854 21004 694124 621695 784812 773331 43101 47659
8192 1024 729664 810451 15470 15875 31318 801490 38123 812944 301222 804323 832765 54308 53376
8192 2048 749217 68757 21914 22667 48971 783309 48132 782738 172848 907408 929324 51156 50565
8192 4096 707677 763960 32063 31928 47809 751692 49560 786339 93445 1046761 1297876 48037 51680
8192 8192 623817 746288 2815955 3137358 48722 741633 35428 753787 49626 803683 823800 48977 52895
16384 4 72372 73651 34471 30788 960 23610 903 22316 891 71445 71138 56451 55129
16384 8 137920 141704 50830 33857 1935 41934 2275 35588 3608 130757 137801 51621 48525
16384 16 245369 242460 41808 29770 3605 75682 4355 75315 4767 241100 239693 53263 30785
16384 32 448877 433956 31846 35010 7973 118181 8819 112703 8177 381734 391651 57749 63417
16384 64 710831 700712 66792 68864 20176 209806 19034 207852 21255 589503 601379 104567 105162
16384 128 836901 860867 104226 100373 40899 358865 40946 360562 39415 675968 691538 96086 105695
16384 256 798081 828146 107103 120433 39084 595325 39050 593110 56925 763466 797859 109645 113414
16384 512 810851 843931 113564 106202 35111 714831 46244 745947 53636 802902 760172 110492 100879
16384 1024 726399 820219 22106 22987 53087 749053 54781 777705 1075341 772686 809723 100349 96619
16384 2048 807772 856458 23920 23617 66320 829576 72105 740848 656379 864539 835446 93499 101714
16384 4096 797470 840596 27270 28132 88784 834938 83428 836809 342898 953274 969699 96499 100657
16384 8192 760063 812942 41022 40014 102020 812135 104063 820346 229870 1252409 1398306 100959 103793
16384 16384 743107 825054 3074035 3551062 97740 826175 103597 803926 94681 820474 829106 97168 92018
32768 64 713528 714585 71310 74296 21135 194177 21551 202998 21110 571030 595232 98598 103373
32768 128 766698 820615 103028 102269 39013 328409 40325 346403 41084 684604 702513 103887 100689
32768 256 766591 819138 107557 113878 42088 574878 41778 557989 55045 749922 754434 100964 104866
32768 512 774365 846915 104255 106094 35280 728957 25829 734316 26990 750614 800955 55013 63750
32768 1024 759113 806241 22033 22622 37322 761870 45003 766950 54519 755666 741339 70018 66255
32768 2048 797566 860344 22893 23859 49973 778872 53509 779539 796674 817078 797585 56750 57047
32768 4096 796693 798985 24267 25222 54410 781810 53053 802845 421421 832858 855811 56748 60507
32768 8192 741543 795144 29254 29150 58678 830011 55545 833914 221323 914182 952916 56120 60014
32768 16384 754641 819797 44183 45718 67293 785047 65078 807273 132136 1240414 1267713 56585 56167
65536 64 663333 656588 32211 31925 17324 202043 15477 215981 15496 592126 597188 86431 93969
65536 128 716218 791603 92035 95614 40330 330127 39295 346542 39469 697385 714453 105094 98327
65536 256 769283 798701 110285 110085 38404 535730 39939 585023 52402 741206 749899 98671 100106
65536 512 728151 814516 112550 108873 32284 690164 38911 708244 50047 778669 765303 98333 92728
65536 1024 773504 827108 21542 20741 45901 775473 57282 807232 69359 770793 766736 101465 100905
65536 2048 767661 853446 21077 21260 59825 762711 71985 802488 87290 772402 775685 96832 103189
65536 4096 767669 828165 20681 21480 79798 829757 91755 838367 1379411 791248 783023 106433 112769
65536 8192 739291 784946 23100 22454 85945 785134 87081 828489 642088 816781 798275 93307 95318
65536 16384 736401 791669 26345 26384 93082 799356 91419 751766 385721 911919 884688 109668 96374
131072 64 658361 661211 79790 81016 19460 182084 19325 195428 19553 551809 554426 96581 81979
131072 128 759806 838994 51063 56976 33624 326699 36329 360593 35679 710602 716538 81725 51819
131072 256 787375 843763 54664 65031 33847 557817 35093 581552 45163 750234 758452 82704 83472
131072 512 777460 818049 87831 87110 27994 705621 31860 723071 38483 779489 793068 88281 86068
131072 1024 737158 782780 19005 18897 36614 735240 38900 812074 52149 746598 762694 74376 82534
131072 2048 777386 817330 24169 24693 55171 769662 56082 788848 55937 757716 763147 73508 82351
131072 4096 751757 792201 25283 25173 48455 813945 56557 837418 59578 749106 757939 67846 70964
131072 8192 743004 796673 20369 20327 88990 780925 95956 777211 951528 762755 739851 70850 69943
131072 16384 766023 823611 22333 22142 108337 796852 110848 777704 718954 809861 802822 115896 82903
262144 64 655769 695392 45973 45668 19083 209417 18768 207272 19133 601329 599267 107705 87261
262144 128 750052 798999 72711 74713 37329 339480 36854 365587 37187 710898 714372 108400 78806
262144 256 788355 815575 80897 75141 37080 549762 37521 574393 51731 780429 751131 97395 73842
262144 512 714994 736649 80224 80195 32986 708196 36048 628508 44043 767699 781863 123267 83558
262144 1024 793541 800826 20200 20428 45599 752027 48232 798229 57011 715643 763691 76741 73211
262144 2048 699395 782935 20227 20519 65785 779219 80486 803403 93381 650054 712171 115611 108457
262144 4096 629531 766261 20544 21563 83107 819917 93008 844103 90625 741879 754931 94114 94475
262144 8192 731695 804112 21158 21589 82987 787869 84858 799483 95127 731822 737397 95950 95160
262144 16384 703376 802552 21940 22371 87748 777024 90349 779626 1018679 765278 619969 96051 92734
524288 64 649937 710342 73778 70893 19734 207179 19367 199709 19493 585910 581340 91902 91443
524288 128 739270 805153 91507 90395 38547 319049 37988 358516 38123 712602 711814 92463 90851
524288 256 751279 802496 89481 91022 38869 544097 38244 569142 56130 756367 752466 92677 92875
524288 512 758393 819788 58085 73437 29030 700120 28767 739236 33925 770177 795879 58963 72689
524288 1024 778385 818368 18822 18639 38774 798827 50898 799492 55679 801849 800917 92778 82686
524288 2048 780594 834612 19936 19994 63147 769555 63007 802512 66322 772900 771314 86628 93485
524288 4096 769806 812570 20165 20137 79896 783615 71217 80835 68550 80166 73733 122559 116844
524288 8192 797504 887823 123824 124513 94520 844880 86441 710319 65077 636713 819868 87765 80121
524288 16384 788468 858216 92580 117354 109583 850179 63966 856965 121151 789252 805040 123810 119088
On Feb 27, 2013, at 2:46 PM, Bryan Whitehead <driver at megahappy.net> wrote:
> How are you doing the read/write tests on the fuse/glusterfs mountpoint? Many small files will be slow because all the time is spent coordinating locks.
>
>
> On Wed, Feb 27, 2013 at 9:31 AM, Thomas Wakefield <twake at cola.iges.org> wrote:
> Help please-
>
>
> I am running 3.3.1 on Centos using a 10GB network. I get reasonable write speeds, although I think they could be faster. But my read speeds are REALLY slow.
>
> Executive summary:
>
> On gluster client-
> Writes average about 700-800MB/s
> Reads average about 70-80MB/s
>
> On server-
> Writes average about 1-1.5GB/s
> Reads average about 2-3GB/s
>
> Any thoughts?
>
>
>
> Here are some additional details:
>
> Nothing interesting in any of the log files, everything is very quite.
> All servers had no other load, and all clients are performing the same way.
>
>
> Volume Name: shared
> Type: Distribute
> Volume ID: de11cc19-0085-41c3-881e-995cca244620
> Status: Started
> Number of Bricks: 26
> Transport-type: tcp
> Bricks:
> Brick1: fs-disk2:/storage/disk2a
> Brick2: fs-disk2:/storage/disk2b
> Brick3: fs-disk2:/storage/disk2d
> Brick4: fs-disk2:/storage/disk2e
> Brick5: fs-disk2:/storage/disk2f
> Brick6: fs-disk2:/storage/disk2g
> Brick7: fs-disk2:/storage/disk2h
> Brick8: fs-disk2:/storage/disk2i
> Brick9: fs-disk2:/storage/disk2j
> Brick10: fs-disk2:/storage/disk2k
> Brick11: fs-disk2:/storage/disk2l
> Brick12: fs-disk2:/storage/disk2m
> Brick13: fs-disk2:/storage/disk2n
> Brick14: fs-disk2:/storage/disk2o
> Brick15: fs-disk2:/storage/disk2p
> Brick16: fs-disk2:/storage/disk2q
> Brick17: fs-disk2:/storage/disk2r
> Brick18: fs-disk2:/storage/disk2s
> Brick19: fs-disk2:/storage/disk2t
> Brick20: fs-disk2:/storage/disk2u
> Brick21: fs-disk2:/storage/disk2v
> Brick22: fs-disk2:/storage/disk2w
> Brick23: fs-disk2:/storage/disk2x
> Brick24: fs-disk3:/storage/disk3a
> Brick25: fs-disk3:/storage/disk3b
> Brick26: fs-disk3:/storage/disk3c
> Options Reconfigured:
> performance.write-behind: on
> performance.read-ahead: on
> performance.io-cache: on
> performance.stat-prefetch: on
> performance.quick-read: on
> cluster.min-free-disk: 500GB
> nfs.disable: off
>
>
> sysctl.conf settings for 10GBe
> # increase TCP max buffer size settable using setsockopt()
> net.core.rmem_max = 67108864
> net.core.wmem_max = 67108864
> # increase Linux autotuning TCP buffer limit
> net.ipv4.tcp_rmem = 4096 87380 67108864
> net.ipv4.tcp_wmem = 4096 65536 67108864
> # increase the length of the processor input queue
> net.core.netdev_max_backlog = 250000
> # recommended default congestion control is htcp
> net.ipv4.tcp_congestion_control=htcp
> # recommended for hosts with jumbo frames enabled
> net.ipv4.tcp_mtu_probing=1
>
>
>
>
>
>
> Thomas W.
> Sr. Systems Administrator COLA/IGES
> twake at cola.iges.org
> Affiliate Computer Scientist GMU
>
>
> _______________________________________________
> Gluster-users mailing list
> Gluster-users at gluster.org
> http://supercolony.gluster.org/mailman/listinfo/gluster-users
>
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