Fastest disk in the west or bad iozone numbers?
Nikolas Britton
nikolas.britton at gmail.com
Thu Aug 3 06:28:02 UTC 2006
Anyone have a clue why iozone reports disk read rates of
688MegaBytes/s on a 1GB test file? Am I doing something stupid, like
not converting the numbers correctly?
I've attached the iozone report, It's from a single 400GB Seagate SATA drive.
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infomatic# iozone -az -g 1g -b ~/seagate.xls
Iozone: Performance Test of File I/O
Version $Revision: 3.263 $
Compiled for 32 bit mode.
Build: freebsd
Contributors:William Norcott, Don Capps, Isom Crawford, Kirby Collins
Al Slater, Scott Rhine, Mike Wisner, Ken Goss
Steve Landherr, Brad Smith, Mark Kelly, Dr. Alain CYR,
Randy Dunlap, Mark Montague, Dan Million,
Jean-Marc Zucconi, Jeff Blomberg,
Erik Habbinga, Kris Strecker, Walter Wong.
Run began: Wed Aug 2 13:22:54 2006
Auto Mode
Cross over of record size disabled.
Using maximum file size of 1048576 kilobytes.
Command line used: iozone -az -g 1g -b /root/seagate.xls
Output is in Kbytes/sec
Time Resolution = 0.000002 seconds.
Processor cache size set to 1024 Kbytes.
Processor cache line size set to 32 bytes.
File stride size set to 17 * record size.
iozone test complete.
Excel output is below:
"Writer report"
"4" "8" "16" "32" "64" "128" "256" "512" "1024" "2048" "4096" "8192" "16384"
"64" 117858 208475 293496 467159 279442
"128" 13911 14740 32152 25182 67120 84273
"256" 27914 63615 235955 248516 27902 41006 71708
"512" 36384 64875 45791 275720 23293 50131 337516 82223
"1024" 28623 6571 97246 251659 71809 85375 125828 325509 278322
"2048" 47798 52503 41486 83218 79279 66456 47005 113475 74461 101551
"4096" 28189 12285 27437 51167 47354 53293 60537 50633 43507 44217 59572
"8192" 30163 42406 66024 43097 26781 34145 33147 56543 32099 70854 46321 66291
"16384" 28205 48073 39713 44404 48775 55348 67135 64065 61474 47064 45921 45291 67852
"32768" 32041 58188 66444 69155 64704 69603 61746 64296 65845 57059 54606 55612 64872
"65536" 35468 51383 58800 60465 61065 60876 60873 57916 57607 59288 58676 56887 59718
"131072" 36040 53350 56741 56059 56369 57402 56329 55548 53857 54671 53841 58136 56973
"262144" 41989 54045 56191 56397 56645 56980 54622 56138 55409 57708 56486 55746 55302
"524288" 43288 53420 55245 55694 56406 56120 55809 55519 54507 55516 55370 55267 56061
"1048576" 46697 52919 54481 54439 55033 54735 54715 54120 55171 54381 54624 54375 54315
"Re-writer report"
"4" "8" "16" "32" "64" "128" "256" "512" "1024" "2048" "4096" "8192" "16384"
"64" 653745 829499 943164 926881 633683
"128" 18127 67542 124981 202546 191015 469042
"256" 266396 325611 368399 133756 275911 349683 527997
"512" 23810 581247 111862 158560 14502 291555 581877 528987
"1024" 54540 62530 122578 385696 290659 370491 369535 466509 552932
"2048" 54979 64220 31940 70530 81616 35326 48416 79781 108400 71254
"4096" 50653 38137 55127 38932 82662 49606 86061 60064 47201 26341 63558
"8192" 30646 27428 66534 81869 46981 42537 62341 60307 52390 36061 46217 69476
"16384" 43660 54881 35682 48482 32834 41479 73412 61000 59474 62223 56970 53378 71564
"32768" 53460 70274 70062 66694 63557 68102 70000 57039 69162 61680 64322 72151 52286
"65536" 53877 45904 56165 59962 59226 59401 57805 57885 57730 60035 59937 59053 60268
"131072" 51140 56017 56050 56288 56041 55215 56123 55062 56726 56384 57301 55848 57552
"262144" 48664 55599 56843 57017 56667 57204 55478 57366 57193 56061 57085 56457 56565
"524288" 48505 55655 55984 55376 55646 56182 55536 56360 56130 56665 56682 56507 55632
"1048576" 50267 52582 53160 53615 53812 53592 53757 53218 53713 53887 54246 54344 54261
"Reader report"
"4" "8" "16" "32" "64" "128" "256" "512" "1024" "2048" "4096" "8192" "16384"
"64" 943164 1144170 1365309 1256653 1280633
"128" 636395 1153045 1468419 1488779 1307491 1346852
"256" 885478 1163807 1361560 1407980 1375513 1422906 1319723
"512" 873453 1069138 1330031 1330031 1414110 1422540 1295529 980760
"1024" 920953 1143004 1245780 1426135 1426135 1190859 1326585 889667 865465
"2048" 881234 1228430 1436297 1471229 1476539 1519371 1353467 837257 799687 842512
"4096" 927107 1229979 1448358 1494862 1506925 1531235 1355348 820840 822963 780774 824148
"8192" 879832 1244800 1471785 1506701 1528892 1553009 1348254 799535 777007 758717 767907 778186
"16384" 895302 1142931 1481929 1518440 1530207 1416206 1242720 765569 788939 781013 780454 778447 806892
"32768" 919105 1218542 864316 1469689 1488713 1485736 668693 787238 779372 786841 785425 509760 784094
"65536" 761380 1235825 1459208 1484433 1461458 1530606 1283914 794974 797157 800008 615938 793068 621046
"131072" 633657 765388 989238 1000846 1005277 1021447 736023 563563 575147 563714 624497 619541 623292
"262144" 658390 841343 936489 1011584 953216 963832 813197 574896 575783 553644 588020 590345 591741
"524288" 686819 794963 925677 948728 935700 1011334 801743 591357 579748 579211 566809 582985 583995
"1048576" 679776 832252 941298 938521 928695 916677 737492 571229 549857 554969 566850 385615 555466
"Re-Reader report"
"4" "8" "16" "32" "64" "128" "256" "512" "1024" "2048" "4096" "8192" "16384"
"64" 1084099 1601534 1950677 1681806 1454056
"128" 1057641 1232453 1969363 1940885 1488779 1562436
"256" 1088312 1618028 1957199 2015994 1705404 1775920 1496271
"512" 912808 1280084 1533247 1547611 1505303 1561112 1354356 957154
"1024" 945692 1196499 1441936 1512519 1523788 1542393 1358044 885813 883445
"2048" 927477 1193442 1486247 1521524 1543117 1536492 1341210 844500 840781 837012
"4096" 931733 1246127 1459184 1514764 1533559 1556202 1361254 744342 821350 740524 826646
"8192" 907988 1163963 1459966 1390879 1376834 1334016 1104935 809901 799759 803292 801400 798829
"16384" 929852 1230680 1422716 1511294 1510198 1548586 1330519 798714 795496 380078 797046 787772 803289
"32768" 926328 1254902 1482787 1513668 1525715 730873 1298313 796670 795435 796034 512696 805386 793877
"65536" 949630 1248017 1459340 1499855 1506332 1548620 1298102 794597 679347 803185 808139 806726 806984
"131072" 723319 890392 888088 908266 1017198 866780 831717 617536 578916 580702 556670 559976 566193
"262144" 689494 839441 907880 1007420 1016042 934449 814025 591753 595362 580618 555263 554385 561362
"524288" 684363 840981 948154 959585 948690 979267 797484 579514 577248 572631 584040 576773 580530
"1048576" 672020 822023 913461 933458 970749 969651 794629 574864 573996 576962 595680 583550 578118
"Random read report"
"4" "8" "16" "32" "64" "128" "256" "512" "1024" "2048" "4096" "8192" "16384"
"64" 939862 1305547 1736194 1528576 1386465
"128" 895364 1279447 1803932 1780008 1388657 1664141
"256" 948023 1415404 1908496 2078432 1620469 1591644 1319723
"512" 855022 1261288 1802167 1019886 1487577 1537638 1463250 958864
"1024" 824431 1162495 1575203 1605228 1605228 1510391 1333173 881993 864246
"2048" 798721 1141578 1434138 1509227 1540902 1588783 1355389 819915 817885 824163
"4096" 763054 1094634 1381394 1435170 1510901 1558602 1309480 789965 754045 814149 806467
"8192" 728306 1068346 1228906 1423198 1463386 1517079 1237626 791432 806782 743578 805515 748128
"16384" 678257 968035 1316424 1387414 1359903 1472593 1268996 756867 767330 770902 764785 775539 747823
"32768" 663063 964506 1227356 1325407 1387815 1422828 1220783 765034 773103 777595 780953 779726 784260
"65536" 640952 945030 1205014 1332143 1379385 1440700 1217800 780673 785303 787181 786395 791745 787305
"131072" 467218 686970 1052930 1152067 1050871 1269398 895171 652119 718931 729101 646011 631301 724491
"262144" 318401 531819 776325 876753 940663 949366 836638 612331 620968 573660 621029 609173 602468
"524288" 269055 441973 694269 776272 869791 884580 740950 562209 568158 563129 573242 566312 574998
"1048576" 248604 410498 648478 745748 795160 856404 702773 543486 550697 543243 563310 551004 569213
"Random write report"
"4" "8" "16" "32" "64" "128" "256" "512" "1024" "2048" "4096" "8192" "16384"
"64" 660176 11301 1084099 1189813 1256653
"128" 20237 76015 128143 248021 316064 452440
"256" 509943 379198 1230492 1202921 300128 517064 483970
"512" 23257 553387 1174379 1289306 240167 365989 1118125 482622
"1024" 474497 179708 1081416 189810 321008 451312 495633 726285 546460
"2048" 113112 214049 182875 200551 324006 298504 439099 580494 620767 81903
"4096" 335927 141602 842951 296252 441135 502958 306446 543449 139566 616415 56287
"8192" 214276 95964 316978 326230 564341 802898 696307 158560 573593 160190 632140 78164
"16384" 76772 114710 259671 406026 253590 427044 412777 497557 202336 628604 120199 668792 70230
"32768" 25826 48242 275592 404302 283782 421991 419457 508559 561624 241459 435715 112419 676117
"65536" 3712 8608 28418 37414 60571 67982 114477 152406 140826 154935 125931 74179 85667
"131072" 1643 3673 8364 15026 21872 30313 38728 40281 50509 65172 68836 67993 64320
"262144" 1114 2169 4603 8415 13822 19978 26690 32989 42054 52142 54453 59280 56858
"524288" 910 1705 3517 6148 10601 16058 22029 27196 37376 44607 51683 52913 53263
"1048576" 798 1529 2961 5329 8956 14073 19504 24811 34062 41747 46940 48185 52688
"Backward read report"
"4" "8" "16" "32" "64" "128" "256" "512" "1024" "2048" "4096" "8192" "16384"
"64" 901966 1030021 1205847 1164016 1046077
"128" 753385 1094289 1330167 1392258 1279447 1363961
"256" 812448 311445 1445900 1241877 1319723 1332828 1230492
"512" 791374 1073413 547044 1023775 1376052 1379588 1252460 951640
"1024" 818617 1109348 1350783 1393288 1444360 1469564 1270470 739286 872143
"2048" 827816 1152607 1379109 1447430 1474259 1510288 1119704 797238 820228 822821
"4096" 839696 1156690 1403743 1458069 1506396 1522685 1237064 803751 817753 805031 816432
"8192" 843854 1145912 1414352 1477926 1503405 1515339 1332257 805987 751975 776568 729279 761626
"16384" 829568 1170378 1413875 1461040 1503129 1533074 1230592 754813 770288 756417 766294 754813 771231
"32768" 831423 1142738 1328199 1436374 1458429 1436870 1266991 509460 774877 779019 494671 767688 575381
"65536" 831802 1132962 1368357 1453637 1476602 1512798 916780 799111 783838 645942 753555 792512 666225
"131072" 731775 951064 1205634 819625 1277006 1340558 925252 727200 719661 669465 726019 631775 602361
"262144" 616403 763446 870921 936138 1014018 948302 805279 593230 558512 556562 604738 594180 569668
"524288" 629279 760065 873868 924733 920140 966199 778618 567960 572007 570904 575487 573989 567140
"1048576" 609478 765300 863218 892598 912228 945475 729335 555739 564369 556397 570014 569149 569702
"Record rewrite report"
"4" "8" "16" "32" "64" "128" "256" "512" "1024" "2048" "4096" "8192" "16384"
"64" 477973 726264 718488 570397 345649
"128" 34840 70560 134297 215126 263480 277078
"256" 570347 1048974 1334484 433903 306992 59883 274711
"512" 70127 169766 2007723 1225305 254483 77365 32991 322609
"1024" 769347 74101 2421594 1882427 431888 33774 96149 29172 292401
"2048" 309462 112559 364728 959703 421827 87107 50261 97485 98932 40118
"4096" 259865 179396 176171 308227 395670 77230 97907 97296 62774 47332 64081
"8192" 258121 360737 1356504 347146 347385 77333 95896 32178 78258 42857 50897 62144
"16384" 246732 101531 365607 320965 163576 268523 117348 100064 70129 61023 66156 58049 74306
"32768" 131375 140063 338354 85771 347508 294612 84424 89033 90721 51286 49826 43575 57765
"65536" 126416 488976 193487 82650 85657 169882 92452 89785 77151 69106 49108 66628 52727
"131072" 191943 144233 178192 88862 95251 170831 91173 89356 69393 68980 51235 65540 53317
"262144" 163350 242786 251025 93041 98151 180403 99772 94125 83690 69605 53478 68477 56235
"524288" 151482 297311 344191 91228 99417 174183 98548 95621 84040 76768 73712 49187 56802
"1048576" 196920 307090 436009 93860 174948 88782 96597 98885 93376 70959 73826 50380 59386
"Stride read report"
"4" "8" "16" "32" "64" "128" "256" "512" "1024" "2048" "4096" "8192" "16384"
"64" 939862 1494534 1331449 1250797 956609
"128" 766289 1092063 1388657 1774126 1346852 1207505
"256" 744304 1048974 1967960 2082463 1570690 1570690 1201575
"512" 798733 928998 1325925 2358287 2000242 1595916 1372534 946190
"1024" 803757 1111933 1302843 1397368 1741241 1592727 1498796 885813 872852
"2048" 799315 1128975 1357102 1433181 1197602 1787108 1583803 845581 827737 823847
"4096" 788153 1079028 1356739 1429200 1486712 1508115 1630492 818532 819821 815579 735766
"8192" 750186 1056747 1344508 1422432 1471785 1519024 1313866 755647 812294 805987 760699 751498
"16384" 729896 519352 1236170 1281204 1395585 1400106 1281085 779445 778932 762900 775977 728372 777003
"32768" 725728 1015811 1243098 1329819 1410764 824599 1236244 771445 783455 784900 756715 576596 574614
"65536" 728233 1009349 869617 1358571 1412624 1093085 1210800 654429 794262 788165 789038 798245 798586
"131072" 551494 814110 1006241 974599 1152736 993609 1004036 621436 702114 658904 671589 706226 688414
"262144" 488433 614594 766588 816345 831546 889347 782008 578050 591085 592887 598537 592411 740908
"524288" 330601 631103 764731 806114 853014 900728 738405 554011 572236 580331 573633 569780 588542
"1048576" 323987 535670 756703 813541 841270 875343 722706 548594 565146 550327 561512 572093 575892
"Fwrite report"
"4" "8" "16" "32" "64" "128" "256" "512" "1024" "2048" "4096" "8192" "16384"
"64" 120341 160392 444715 309395 323178
"128" 29795 61690 102718 163699 189599 274107
"256" 173558 182714 229402 168097 173111 221636 248114
"512" 32064 303848 196016 242664 42133 206040 306931 252241
"1024" 71032 7488 202291 154098 208933 208386 269977 282626 269960
"2048" 28574 57905 46074 84628 111322 21929 35575 10923 39396 40532
"4096" 32313 36343 20428 40400 43504 37371 25185 48052 42285 53984 22575
"8192" 29297 27645 21547 46385 30177 60747 37799 44092 56211 36807 49991 31320
"16384" 51985 74634 64751 48399 49246 34965 46793 38706 51431 47810 60384 42587 64084
"32768" 23588 61511 46536 68839 51658 57271 45208 42511 48835 41917 50324 42838 38891
"65536" 33284 47077 47355 60183 39840 53654 57066 51313 45609 50968 54428 47874 44928
"131072" 42362 52639 54173 54817 54704 52446 52672 51318 53377 53239 53844 53811 50267
"262144" 44195 53956 55794 55221 53830 54816 54802 52673 54190 55702 53748 55104 52647
"524288" 46571 54812 55441 55896 55066 55386 54572 54817 53906 54706 54420 54042 54456
"1048576" 47164 53860 54978 54688 55351 54201 54682 54373 53553 54209 55514 55200 53918
"Re-Fwrite report"
"4" "8" "16" "32" "64" "128" "256" "512" "1024" "2048" "4096" "8192" "16384"
"64" 712765 1120295 1033989 1184562 1227911
"128" 27807 72436 69717 211232 303898 446050
"256" 243334 335480 373136 346523 172057 322870 281998
"512" 45559 583141 337251 335512 265297 291753 556543 172855
"1024" 115809 61801 262022 202091 270760 317519 358672 441750 552363
"2048" 42500 69911 36281 70081 99505 62425 94178 89891 95082 48607
"4096" 51114 35905 30470 33740 63009 50357 37852 72050 36513 38836 44165
"8192" 44656 41598 45656 47240 62032 65263 49777 59739 47799 63765 23567 50673
"16384" 60628 66609 66472 75819 66063 34847 57597 38156 59057 39094 60363 39802 58925
"32768" 44115 69240 42242 65800 42032 63513 50184 41694 41155 41023 45039 41748 45634
"65536" 44568 49348 49612 57112 61749 58788 61536 47601 50430 48983 46541 48376 43014
"131072" 50916 55543 57524 55636 57064 58508 55440 50419 50598 51150 50815 52241 49048
"262144" 48468 56062 55454 56313 55966 57111 56091 52938 53908 53634 53475 53913 52325
"524288" 51261 55661 55685 55267 55800 55497 55703 54610 54373 54256 54705 54448 54135
"1048576" 48862 53733 54585 56135 55240 55372 55081 55541 55096 55009 54908 55036 54462
"Fread report"
"4" "8" "16" "32" "64" "128" "256" "512" "1024" "2048" "4096" "8192" "16384"
"64" 576522 839880 696129 587886 470434
"128" 743988 1015624 1057641 913649 761939 431009
"256" 759573 898069 1058278 901083 802730 581781 449149
"512" 772028 890476 1103757 944525 870620 682691 505455 224853
"1024" 831132 1009010 1126515 1005703 924919 803757 549677 377991 341667
"2048" 826144 1043403 1198437 1023999 899506 800283 542101 397211 377801 338618
"4096" 837119 1045728 1158015 883710 971513 927958 584138 408125 394879 357760 305101
"8192" 826062 1030165 1190540 1052539 976639 953123 583311 392787 381111 202361 362224 329341
"16384" 809372 1021325 1167951 1004045 965586 930016 571388 402969 401322 397931 388826 366860 331311
"32768" 794359 1041278 1191778 1021003 953976 946917 573018 409804 410590 409727 400894 389478 367185
"65536" 827099 815255 1213542 1026596 914985 893056 546958 395775 397510 352099 398296 354392 345787
"131072" 582314 760892 719610 691613 711110 649356 446313 337110 338693 338013 330626 337190 329130
"262144" 619134 671207 783824 696191 627023 636897 425565 330437 338622 333954 336003 326043 319446
"524288" 614594 723424 787378 723347 672277 640674 458238 328487 339240 333926 331306 332332 330905
"1048576" 604730 597288 772834 699401 681707 669003 445134 332838 332274 336662 334814 332609 327555
"Re-Fread report"
"4" "8" "16" "32" "64" "128" "256" "512" "1024" "2048" "4096" "8192" "16384"
"64" 939862 1164016 1365309 1033989 887063
"128" 978599 1317114 1576197 1229631 1041231 1023368
"256" 1007629 1339479 1579934 1196221 1027886 918032 503015
"512" 853323 1091971 1236594 1080434 995767 940801 536118 395950
"1024" 689111 1049187 1203203 1060063 982917 951769 579569 424210 438145
"2048" 838319 1068318 1226325 1056753 860920 946381 570622 425863 428007 385915
"4096" 836426 1073365 1205722 1055948 974102 965344 519349 410749 423278 420625 406348
"8192" 797031 958574 1068911 993210 917958 896100 560174 419135 194436 421811 420402 401865
"16384" 746767 1061622 1176409 423447 940800 957567 578365 414398 389650 419446 409977 418386 418825
"32768" 532951 1070325 1210802 1058161 980050 957598 588324 319915 412539 350688 415341 419699 417166
"65536" 842918 1056675 1106862 1040370 918950 901645 476532 340958 351848 401308 368109 403214 407417
"131072" 585265 699719 719847 755514 661211 705503 451483 337377 335498 340657 334430 343000 336564
"262144" 608585 713580 781784 706159 658825 627410 411438 343220 339432 324079 338199 341555 335563
"524288" 587381 704281 779733 715400 694322 668137 461308 329293 331211 323208 329167 341647 333979
"1048576" 614423 721647 768456 706908 659344 654870 444793 329020 331836 325319 331992 329256 331524
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