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 Oct 23 13:09:43 2025 Auto Mode Machine = Linux oleg636-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-oleg636-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 6830 21835 488236 488236 64 8 9717 36384 780776 712397 64 16 6873 57867 842003 866463 64 32 10464 85548 586352 1357066 64 64 6199 38185 1226821 587635 128 4 10553 16771 571257 566435 128 8 19476 43300 876086 695603 128 16 18594 71833 1015251 919605 128 32 17832 85847 1266785 1032829 128 64 25467 84376 1349580 1377278 128 128 29445 142830 1142750 1858934 256 4 6295 10423 740100 536654 256 8 21996 42865 870268 778183 256 16 29236 69038 1080434 941213 256 32 36883 101624 1280084 1158540 256 64 27029 110777 1479379 999940 256 128 37372 144790 1619994 1312954 256 256 18330 170224 1422540 2242541 512 4 16626 22174 703215 503418 512 8 27741 40232 895230 775599 512 16 19398 44329 1145443 904658 512 32 22116 53878 509993 1276891 512 64 54983 110083 1479181 1216149 512 128 56952 153657 736497 1387437 512 256 64613 176011 761841 1471074 512 512 32060 182193 1772135 2304647 1024 4 14606 21248 648903 589902 1024 8 19982 32038 849679 786507 1024 16 39363 64253 1023877 878890 1024 32 25014 51074 728354 534212 1024 64 21573 51088 1164956 1226500 1024 128 33828 120513 1535119 684478 1024 256 63807 70958 1548960 1428415 1024 512 54645 181078 1793451 1450607 2048 4 13445 19094 609526 429608 2048 8 16375 29206 1028142 301445 2048 16 42292 23950 1029621 721127 2048 32 27284 49795 1233688 1032840 2048 64 80804 72281 1361794 620220 2048 128 49741 139442 819509 1322992 2048 256 44267 95180 1135813 1615011 2048 512 61481 87682 1705432 1324624 4096 4 17820 16377 527770 469834 4096 8 26699 33877 565819 377614 4096 16 34388 55523 1007924 939005 4096 32 39318 97488 1392683 1239009 4096 64 66561 79157 1271659 906216 4096 128 67152 114127 1574285 1387509 4096 256 72675 86501 776357 1277997 4096 512 83569 154619 446615 444305 8192 4 13675 14696 426422 369993 8192 8 29002 24788 289674 471891 8192 16 35856 36517 316048 568495 8192 32 56678 69941 1309900 1100927 8192 64 46655 61884 524185 624338 8192 128 58264 102345 1683244 978385 8192 256 64997 52216 863140 622258 8192 512 40008 99067 1762145 1502274 16384 4 12749 13387 404482 323003 16384 8 19989 23001 465920 724607 16384 16 26652 28692 825599 970794 16384 32 29305 48328 1128142 755476 16384 64 33724 69900 674959 850238 16384 128 41071 67753 1603729 1374944 16384 256 66968 59664 587432 793181 16384 512 64103 88759 1185619 1011222 32768 4 9971 10727 429636 272340 32768 8 14539 20862 496085 401859 32768 16 29468 31331 617739 423786 32768 32 42123 47756 1185781 1027083 32768 64 45048 70317 936980 770450 32768 128 55019 82405 517016 1359277 32768 256 48223 62344 1100446 716003 32768 512 46885 97282 907344 1107514 65536 4 12097 12470 356998 314660 65536 8 13373 17264 241470 324474 65536 16