Iozone: Performance Test of File I/O Version $Revision: 3.483 $ Compiled for 64 bit mode. Build: linux-AMD64 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, Gavin Brebner, Jean-Marc Zucconi, Jeff Blomberg, Benny Halevy, Dave Boone, Erik Habbinga, Kris Strecker, Walter Wong, Joshua Root, Fabrice Bacchella, Zhenghua Xue, Qin Li, Darren Sawyer, Vangel Bojaxhi, Ben England, Vikentsi Lapa, Alexey Skidanov, Sudhir Kumar. Run began: Tue Sep 29 23:45:35 2026 Auto Mode Machine = Linux oleg655-client.virtnet 4.18.0rh8.10-debug #2 SMP Mon Jul 14 01 Excel chart generation enabled Excel chart generation enabled Verify Mode. Pattern dbdbdbdb Performance measurements are invalid in this mode. Using maximum file size of 102400 kilobytes. Using Maximum Record Size 512 kB Command line used: iozone -a -M -R -V 0xab -g 100M -q 512k -i0 -i1 -f /mnt/lustre/d4.lustre-rsync-test/d0.iozone-oleg655-client.virtnet/iozone-file Output is in kBytes/sec Time Resolution = 0.000001 seconds. Processor cache size set to 1024 kBytes. Processor cache line size set to 32 bytes. File stride size set to 17 * record size. random random bkwd record stride kB reclen write rewrite read reread read write read rewrite read fwrite frewrite fread freread 64 4 5340 3886 621657 610350 64 8 3325 14368 913649 771797 64 16 7875 17753 1188789 1033216 64 32 7643 69492 1336792 789967 64 64 1990 11460 1526887 1460430 128 4 2656 6607 345965 472262 128 8 6603 21974 624409 656477 128 16 9074 27879 1196221 1040839 128 32 7301 67762 1306873 1172704 128 64 6895 82471 707520 1455701 128 128 13210 45375 1561553 124022 256 4 9318 9768 686182 308475 256 8 13895 24383 952062 572721 256 16 14331 39119 969251 622890 256 32 20404 56890 1122215 941213 256 64 18743 79626 1479379 999940 256 128 14666 96500 1523457 1600674 256 256 21467 95065 1332507 2247235 512 4 10114 8417 398434 357270 512 8 15027 12247 711133 188296 512 16 16445 12778 613250 548134 512 32 21489 55459 1434711 1218910 512 64 19410 63640 1011625 1336492 512 128 12936 59190 230001 706221 512 256 22060 68920 1809465 1747618 512 512 27270 61501 1889050 1705969 1024 4 6368 12048 110821 150300 1024 8 6813 7947 904621 835140 1024 16 15725 20603 592180 987392 1024 32 12316 26797 1322828 666216 1024 64 22210 53087 1304348 295882 1024 128 45026 84488 915223 898189 1024 256 43773 66261 944612 523788 1024 512 51284 95478 1646334 1032244 2048 4 4837 5950 236762 447956 2048 8 14222 13585 428536 822805 2048 16 14512 25836 683106 613356 2048 32 24473 27182 1286533 406993 2048 64 17564 31925 256356 237089 2048 128 15368 60629 372103 1381728 2048 256 31110 75784 1706788 1512364 2048 512 34682 53653 1735759 858666 4096 4 10777 13582 479057 458780 4096 8 25036 17180 438074 855281 4096 16 22714 25942 735477 668404 4096 32 24693 37661 876309 733154 4096 64 21231 37677 410052 939879 4096 128 44787 50018 502838 489485 4096 256 53908 49568 752091 1036192 4096 512 23640 81910 649748 622689 8192 4 10248 2552 244129 183689 8192 8 10216 12649 639598 432797 8192 16 20449 25457 512130 443627 8192 32 24390 27651 747783 362143 8192 64 28086 43368 920757 803458 8192 128 41295 67675 383450 508213 8192 256 38841 49281 1066383 746353 8192 512 30957 79293 1447590 903518 16384 4 7872 7038 351000 338967 16384 8 12462 14220 444916 475877 16384 16 16106 23308 611710 456468 16384 32 27733 40180 749494 547043 16384 64 37788 48887 1060178 611618 16384 128 40268 54594 852093 613655 16384 256 36302 60363 1487988 1114855 16384 512 49463 49951 772860 947112 32768 4 8338 8676 416519 306802 32768 8 12780 15687 646006 473369 32768 16 22949 21242 493352 493040 32768 32 21757 40777 913520 718485 32768 64 33351 45456 639426 1105527 32768 128 33607 51970 758096 643302 32768 256 44619 73252 930113 836045 32768 512 53269 65011 1374502 509673 65536 4