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: Thu Aug 27 08:52:43 2026 Auto Mode Machine = Linux oleg612-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-oleg612-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 4 799 2864 615952 566551 64 8 4526 20401 760859 256923 64 16 4253 21686 952555 193843 64 32 3627 44540 86485 889431 64 64 2797 25177 592827 1143223 128 4 4895 7609 615109 526961 128 8 3336 4684 824932 267791 128 16 4992 17116 864797 703810 128 32 6648 17756 1254941 753179 128 64 5461 50021 707520 1206978 128 128 7304 50529 1421023 542400 256 4 4117 8940 392047 519266 256 8 5121 9592 853662 342195 256 16 8222 13689 1079348 1011241 256 32 12805 57694 1361224 265593 256 64 14661 56091 1190657 307679 256 128 9168 62167 1455317 1325925 256 256 9962 64112 270340 97340 512 4 5393 8536 302045 399992 512 8 6849 16024 444447 133609 512 16 11642 17723 1078159 963945 512 32 9211 15026 309712 710192 512 64 16025 81685 1205228 1066380 512 128 11846 49530 1127995 1339827 512 256 18489 39478 1276891 1652157 512 512 6634 52517 321440 2024389 1024 4 9339 12222 311708 377320 1024 8 5884 18039 628212 90835 1024 16 12311 33503 518540 697483 1024 32 23005 37780 1314327 619156 1024 64 24308 64954 386871 609491 1024 128 29260 68581 1034481 830457 1024 256 15479 48405 1652033 249507 1024 512 32817 84342 472503 1068717 2048 4 5101 4622 216628 232696 2048 8 8876 7167 717333 343737 2048 16 10824 10322 620399 506936 2048 32 24859 38966 1269610 491364 2048 64 28194 54145 215601 536978 2048 128 16649 56211 809774 756568 2048 256 17092 47676 846315 445910 2048 512 60990 90868 1627866 706943 4096 4 9333 9343 85056 265646 4096 8 13684 21585 548110 299897 4096 16 18502 17502 868380 429209 4096 32 24416 27797 235160 489611 4096 64 33925 46063 690847 372464 4096 128 25792 28635 479900 786486 4096 256 38797 65086 916318 666123 4096 512 39801 98758 785731 1540407 8192 4 6949 6775 451799 321344 8192 8 1995 22708 494478 322939 8192 16 16626 27804 438895 530981 8192 32 20642 22536 292665 398208 8192 64 24534 26084 435055 317913 8192 128 31517 49288 721194 537283 8192 256 38568 44182 540266 468513 8192 512 26925 59313 1057586 504342 16384 4 7086 7121 420254 431465 16384 8 12395 12259 470588 293467 16384 16 15382 19829 736031 382678 16384 32 20627 31569 568593 481738 16384 64 29963 29218 694677 354418 16384 128 19545 28604 537884 372016 16384 256 37575 39954 871258 465081 16384 512 22343 38471 1007368 505238 32768 4 6716 7396 438702 367033 32768 8 11273 12999 341867 380204 32768 16 17966 21766 430298 318240 32768 32 28415 26512 764872 416889 32768 64 25171 38434 519188 695668 32768 128 33455 41853 950596 648539 32768 256 38994 58095 828685 990838 32768 512 39249 59290 711032 648986 65536 4