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: Sat Aug 15 16:41:22 2026 Auto Mode Machine = Linux oleg235-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-oleg235-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 2995 5376 598110 520419 64 8 7838 26026 688639 681644 64 16 7106 16356 444572 789967 64 32 6108 45139 1279447 983980 64 64 8883 81324 1392258 769584 128 4 4284 10484 606767 522855 128 8 5596 16846 848397 637004 128 16 12796 29589 934004 847059 128 32 6968 40339 1093856 805138 128 64 7172 48577 1508887 1206978 128 128 17337 73304 322482 1663139 256 4 12070 13489 389064 495999 256 8 10535 9622 636930 768712 256 16 9681 23427 870974 937924 256 32 19948 57257 1084800 478536 256 64 18768 63381 1019886 1153561 256 128 13148 37355 1455317 1108314 256 256 22537 51209 1579483 1952947 512 4 8479 8609 621953 178781 512 8 10689 15967 553502 199361 512 16 13608 35400 1248678 1110496 512 32 26177 42171 504956 471890 512 64 18333 77636 882718 680918 512 128 23948 45522 778128 1413929 512 256 46293 201569 1142396 1630828 512 512 13102 119545 836636 1484293 1024 4 5623 13210 439301 226506 1024 8 11575 9538 876737 428263 1024 16 15594 20676 836604 413900 1024 32 27562 51181 868581 782781 1024 64 34669 78036 1066859 1190795 1024 128 14222 58053 492553 1321200 1024 256 48866 90102 1605111 1061060 1024 512 30475 104211 1120580 468432 2048 4 8094 6841 334644 277993 2048 8 12488 15122 433335 1127760 2048 16 22788 27404 1362658 932188 2048 32 26652 27764 638001 363183 2048 64 30148 32688 1111130 587997 2048 128 41283 68017 1856558 1044393 2048 256 24746 98000 1807720 288332 2048 512 26733 39783 566214 911031 4096 4 7679 9031 381268 508568 4096 8 9746 10396 371924 698260 4096 16 19962 17839 906598 342188 4096 32 12861 25758 826320 415245 4096 64 24244 78027 389948 479914 4096 128 37203 47325 1884004 504373 4096 256 33165 44327 459443 303135 4096 512 42413 52070 1608781 828152 8192 4 4211 2154 419027 407642 8192 8 12795 9655 382268 448755 8192 16 15675 18466 517109 348282 8192 32 25684 25838 462117 663151 8192 64 25441 35660 741681 450679 8192 128 24363 36251 814080 510782 8192 256 30609 62285 1579626 610668 8192 512 39835 71821 843229 898838 16384 4 6078 5416 143515 186226 16384 8 7610 8769 279991 349712 16384 16 16942 16617 614714 625172 16384 32 25151 24211 786670 521187 16384 64 28247 36294 526530 542067 16384 128 30949 34379 920558 650002 16384 256 38746 49655 911945 886339 16384 512 52421 69484 1183373 912757 32768 4 9938 6259 367378 310100 32768 8 8833 8144 384948 388767 32768 16 15911 24480 993509 477738 32768 32 36185 22777 705293 533342 32768 64 25312 24371 659673 394328 32768 128