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 16:00:44 2026 Auto Mode Machine = Linux oleg435-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-oleg435-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 4 964 4828 546928 591520 64 8 4049 9369 863676 763021 64 16 2629 7267 1017549 942521 64 32 1916 25248 1124074 789967 64 64 1441 18286 1143223 1232453 128 4 4046 9779 576780 439767 128 8 5163 14228 753179 472262 128 16 4848 29513 895074 847059 128 32 7443 41355 1076312 455822 128 64 9881 37612 1185654 1217930 128 128 5511 18815 1391557 84655 256 4 3744 4519 382685 512084 256 8 5996 16368 691930 699594 256 16 7694 25625 799625 516022 256 32 3728 33358 1413179 455592 256 64 5435 18281 1325925 701422 256 128 8801 18521 644578 412215 256 256 6128 35048 191165 1924938 512 4 5973 5236 386112 551796 512 8 15874 19103 927315 505908 512 16 7625 25556 337081 1123275 512 32 19885 35896 453936 602243 512 64 12677 37600 857345 863203 512 128 12014 45755 1547395 134876 512 256 22961 67340 147890 1528669 512 512 13970 44172 1471074 2187279 1024 4 5893 4140 565439 178363 1024 8 10283 5285 123643 362481 1024 16 18913 14693 136353 910181 1024 32 19813 15584 953630 1299612 1024 64 12493 21959 435913 1101328 1024 128 12436 40315 993100 782353 1024 256 30268 43413 1473500 421248 1024 512 18303 32089 1016847 752340 2048 4 3091 7569 105235 210983 2048 8 3917 6396 587313 823752 2048 16 8349 11185 536106 367943 2048 32 11943 11572 416001 386345 2048 64 19094 39486 508195 433992 2048 128 22008 56674 1381950 789530 2048 256 30999 30785 417782 1023975 2048 512 25720 44746 1032220 650368 4096 4 7057 9742 177024 141279 4096 8 19242 8907 356511 435376 4096 16 21603 19923 669811 537109 4096 32 17386 44883 579758 568196 4096 64 21935 20663 592413 288515 4096 128 31025 49340 654226 354196 4096 256 21351 23484 1027577 315100 4096 512 24682 32514 851888 695293 8192 4 1887 10191 188295 223593 8192 8 7172 7389 663586 346372 8192 16 9954 13833 593618 305181 8192 32 14234 18975 595305 501069 8192 64 33796 45337 900133 675404 8192 128 25471 52938 1653277 732541 8192 256 30420 44185 427137 783024 8192 512 24314 75883 1013358 879084 16384 4 8549 9786 116617 384365 16384 8 10525 9562 634571 449541 16384 16 12454 15543 876984 268428 16384 32 18727 22560 375919 364858 16384 64 29850 33074 1100483 369314 16384 128 17582 33554 732610 614231 16384 256 28025 51172 322602 217913 16384 512 27476 44790 429709 363499 32768 4 4959 3624 196959 152343 32768 8 8484 8311 431578 406944 32768 16