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: Fri Sep 11 03:20:55 2026 Auto Mode Machine = Linux oleg227-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-oleg227-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 2389 6458 205099 592827 64 8 3358 10423 720041 561808 64 16 3518 10171 852702 712397 64 32 3742 32338 901377 760859 64 64 3971 45747 998622 1722886 128 4 3406 3063 175573 186361 128 8 5405 19041 757430 207141 128 16 5104 24951 1133103 618653 128 32 5499 27675 990891 218791 128 64 4981 25044 1243315 1114289 128 128 4080 47231 359398 1755594 256 4 3318 5567 544823 208988 256 8 4041 5679 889002 782721 256 16 9604 28316 1089202 944525 256 32 11031 11169 566377 888266 256 64 8522 30914 1195962 1132871 256 128 7326 38717 362040 407676 256 256 8829 30181 1287760 1639786 512 4 5025 5065 567695 459964 512 8 3226 3414 887461 594079 512 16 7283 26717 914287 448719 512 32 11172 31414 1004057 653961 512 64 17468 31501 512060 831132 512 128 7932 36324 1110496 1168504 512 256 7982 69545 907717 735740 512 512 7768 64081 1209982 132537 1024 4 6855 4372 527325 516917 1024 8 9246 6016 805084 728231 1024 16 10020 17256 612446 146536 1024 32 8807 16221 1098792 993100 1024 64 20026 40023 1045053 540941 1024 128 27627 43298 679067 819837 1024 256 29945 46439 1422266 1556257 1024 512 8388 51356 1783768 1038734 2048 4 5222 5226 613356 404750 2048 8 8734 16244 972944 597111 2048 16 15050 16598 344316 463248 2048 32 7910 15608 266910 370211 2048 64 31755 19843 411064 1230155 2048 128 28594 65769 1382840 776891 2048 256 36350 49266 674365 1424106 2048 512 42099 71361 1582579 413319 4096 4 11952 5617 322615 241895 4096 8 6310 5558 209782 223790 4096 16 15272 16879 1241965 357483 4096 32 24464 47776 497378 539656 4096 64 19714 42313 489192 394678 4096 128 20664 32354 749924 866540 4096 256 29374 74091 1159328 585229 4096 512 40396 72726 847852 455508 8192 4 2368 6506 333684 269005 8192 8 7797 6765 358213 601243 8192 16 12017 11511 407217 315479 8192 32 18915 18977 271788 287267 8192 64 16966 24927 655672 526951 8192 128 20156 30728 466858 429331 8192 256 23346 20346 388448 293492 8192 512 19865 29427 412616 396535 16384 4 3130 7785 147958 179869 16384 8 5445 5810 165352 155175 16384 16 8889 12610 400860 381911 16384 32 13974 20922 389326 278303 16384 64 21714 21389 706817 484162 16384 128 19396 27553 848642 681079 16384 256 29769 30875 519057 366244 16384 512 18402 24444 609340 247167 32768 4