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 Jun 11 21:31:47 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 6102 11980 560635 551422 64 8 7759 27948 340738 627470 64 16 6040 41184 292475 809014 64 32 4209 67790 1279447 1049372 64 64 6642 68534 1049372 3203069 128 4 8491 18076 643108 58656 128 8 11101 36078 913347 584950 128 16 13632 43433 1065630 766076 128 32 17824 80252 1243315 1175271 128 64 20192 99998 1406136 630273 128 128 16182 100560 1377278 1858934 256 4 10007 13993 1153561 572721 256 8 15522 23703 1102624 746272 256 16 16539 53465 1123389 690151 256 32 20587 86958 1956506 764334 256 64 24171 131621 1523457 1243036 256 128 28709 151941 1376935 1075025 256 256 26427 202868 1540948 2170027 512 4 10329 14231 332695 485328 512 8 21288 25817 572081 827289 512 16 30600 50131 1137555 966113 512 32 24807 89617 1399189 1017858 512 64 49659 100374 1326585 1218910 512 128 36602 124363 1286067 1153441 512 256 34583 159904 1518938 1222379 512 512 53095 159004 1968713 2081286 1024 4 15901 17793 640007 575285 1024 8 25535 31700 637159 716567 1024 16 37726 52832 1024121 1037480 1024 32 47836 70577 1104727 1186846 1024 64 44307 108822 1057663 1087111 1024 128 55543 64036 1351126 1267024 1024 256 55372 130115 1241031 560495 1024 512 45261 149443 1457004 533085 2048 4 11750 16007 612787 709923 2048 8 24247 29041 521113 593276 2048 16 23507 35013 790765 955200 2048 32 38003 84488 1257897 556674 2048 64 56983 64367 1407538 1399968 2048 128 63997 72655 1064981 1289623 2048 256 53611 68787 1059595 1460673 2048 512 58796 111238 1922629 1507057 4096 4 14554 15515 601203 271959 4096 8 27458 27202 969967 816269 4096 16 37589 40764 1140927 686431 4096 32 49894 65750 1345983 1199392 4096 64 67579 110798 1445288 1204353 4096 128 61950 125590 1531209 1578334 4096 256 76763 99567 1562259 1402231 4096 512 73411 148696 2188015 1374520 8192 4