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: Wed Mar 11 09:25:18 2026 Auto Mode Machine = Linux oleg419-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-oleg419-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 3711 12470 57189 249985 64 8 6679 31250 385237 481234 64 16 12492 44569 139461 983980 64 32 8145 36261 969761 1279447 64 64 7472 76634 1255511 1285575 128 4 7919 10128 171370 139890 128 8 11355 19753 615814 444501 128 16 8865 45025 1133103 1040839 128 32 11611 64552 1642783 744820 128 64 19628 85505 1111981 1133103 128 128 28834 150560 1440082 2202044 256 4 12767 16486 300111 267779 256 8 13438 27717 456172 533455 256 16 14010 32850 423933 984356 256 32 23117 46294 996229 901693 256 64 23104 86308 1190657 1027695 256 128 39493 108702 1445521 1375171 256 256 33813 92049 2223962 2849590 512 4 12321 10275 210975 216506 512 8 26107 35699 332232 318390 512 16 37090 60044 701378 677267 512 32 43955 37125 1030064 439085 512 64 34562 102135 1312798 1402845 512 128 40337 81996 996139 1286838 512 256 48388 146577 1589779 1258188 512 512 37594 129227 2381315 1707325 1024 4 18329 20737 223082 300540 1024 8 22955 30348 525905 525712 1024 16 25190 53724 825192 342233 1024 32 37353 85027 1208894 734081 1024 64 53200 82235 578539 575593 1024 128 70688 116854 1128826 1116792 1024 256 70880 137158 1508167 1338494 1024 512 70200 80263 1363133 1732676 2048 4 17620 21710 312283 271542 2048 8 20079 35911 499885 339579 2048 16 40659 58404 361973 597610 2048 32 63165 77239 933403 1010841 2048 64 51444 94622 1478778 1011794 2048 128 64620 115955 1807720 1057378 2048 256 49611 112311 1074977 655779 2048 512 84338 75394 1621719 1334917 4096 4 13548 17375 207214 267171 4096 8 30775 34118 561951 437650 4096 16 46491 50130 696957 755996 4096 32 56754 87275 481029 579015 4096 64 48628 64081 872437 876130 4096 128 42983 94258 1516476 650880 4096 256 66303 111382 456792 1019649 4096 512 46996 117165 1399376 1373092 8192 4 16327 19478 316464 254892 8192 8 24006 28401 483444 457064 8192 16 44376 48708 869188 512313 8192 32 58007 81327 1188967 853238 8192 64 75837 109602 1516798 1122507 8192 128 87395 113044 1317080 1335769 8192 256 88096 129431 1430713 1566305 8192 512 75172 127868 1232998 1665377 16384 4 18240 19706 374320 311963 16384 8 31670 33441 521337 433794 16384 16