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: Sun Aug 23 01:08:01 2026 Auto Mode Machine = Linux oleg232-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-oleg232-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 2390 6393 581273 190541 64 8 3761 14469 140043 194545 64 16 4634 16846 1163036 952555 64 32 4532 55032 2067979 1879725 64 64 5482 68604 246089 1255511 128 4 5934 11331 637004 561694 128 8 3889 5462 805138 243832 128 16 7995 46905 1040839 335794 128 32 14233 64911 1332828 1858934 128 64 6412 31881 1451764 1561553 128 128 4618 71670 1603529 1684006 256 4 2233 4256 446870 245718 256 8 3911 5532 930608 718796 256 16 5496 11105 494400 907792 256 32 6743 24305 120134 168965 256 64 9112 29018 211416 937924 256 128 5126 13463 130343 1453348 256 256 7218 38077 1881098 2097948 512 4 4498 5782 464541 570865 512 8 10403 9432 984720 774480 512 16 19651 17368 929322 975328 512 32 19404 33431 1293037 867738 512 64 16552 36563 934173 51343 512 128 12270 45832 827289 1410215 512 256 19301 50472 144506 1614885 512 512 21562 46869 1661103 2032051 1024 4 11271 4687 221884 587803 1024 8 15190 9428 707595 410577 1024 16 11047 23872 879070 270042 1024 32 14774 30737 463578 1126458 1024 64 17797 43448 1349428 1636299 1024 128 25377 74598 1495042 670585 1024 256 26075 72562 1333507 876022 1024 512 38198 63397 1759651 1244266 2048 4 5611 7207 190245 243839 2048 8 12365 20147 1144133 153373 2048 16 21561 32928 1178995 209424 2048 32 29597 25588 374618 242449 2048 64 26950 47312 748264 1276781 2048 128 52553 67121 974378 626325 2048 256 28663 39226 726003 647866 2048 512 38708 87547 1231389 1476490 4096 4 6219 6706 258080 251473 4096 8 8808 10515 415285 294232 4096 16 13456 11532 572055 254125 4096 32 23239 32523 345596 587169 4096 64 25947 32833 531262 432886 4096 128 30049 28669 642699 1327265 4096 256 17416 72036 922715 595452 4096 512 28154 112341 846974 464662 8192 4 6914 7278 203019 402217 8192 8 10855 11290 332383 333713 8192 16 16454 10746 342430 329527 8192 32 13334 26832 1228546 491268 8192 64 44629 43706 978385 1011478 8192 128 28970 27096 1076641 664600 8192 256 26128 63285 567978 750314 8192 512 46681 50031 670488 752466 16384 4 5400 6908 184255 209959 16384 8 10923 13722 429486 234300 16384 16 20353 14617 457587 636492 16384 32 29805 34518 787355 546973 16384 64 28810 42357 701972 673853 16384 128 38562 40598 1231227 1144203 16384 256 45418 43898 905600 908053 16384 512 37514 39940 1111897 1042850 32768 4 4416 4647 312374 335614 32768 8 9658 10079 398962 413147 32768 16 14515 16142 521135 502431 32768 32