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 Sep 5 09:09:28 2026 Auto Mode Machine = Linux oleg638-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-oleg638-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 2758 6611 763021 633392 64 8 4058 13579 955947 801764 64 16 3474 15463 1124074 955947 64 32 2903 44540 1336792 939223 64 64 2752 16129 1066042 1780008 128 4 1371 13719 649331 533771 128 8 6020 12018 434078 841746 128 16 4384 21383 1059322 1015251 128 32 8646 17832 985435 864797 128 64 6375 21910 1319723 1440082 128 128 6103 51302 1543594 1802755 256 4 7085 9285 624339 580461 256 8 6737 21401 249023 241735 256 16 11179 35669 602276 973645 256 32 3661 12023 992545 1019886 256 64 12353 27182 1206714 369388 256 128 7002 61420 644965 1347557 256 256 11670 64989 581719 2061693 512 4 5159 5646 435435 335083 512 8 9696 9598 772252 713970 512 16 11130 10989 514637 472825 512 32 19112 18558 787545 537299 512 64 17239 23452 1580419 302257 512 128 7293 28109 1595686 1454140 512 256 15680 55676 1667552 1171691 512 512 25705 83850 1783912 1347393 1024 4 4521 8109 364017 362725 1024 8 14306 23282 890369 589821 1024 16 20785 18313 1090423 321099 1024 32 28423 42368 1035229 863517 1024 64 17401 47539 1000969 787084 1024 128 26883 60796 1587315 763033 1024 256 33967 77067 1013967 1186518 1024 512 31150 24538 1070048 1633188 2048 4 9091 7585 276534 306675 2048 8 11821 10314 504554 376886 2048 16 20121 15122 392041 189665 2048 32 20687 19966 254344 256931 2048 64 15642 31741 1538916 544949 2048 128 16519 27925 761599 317912 2048 256 34241 44135 1023975 1443248 2048 512 30622 77282 1734007 814303 4096 4 6656 6264 265770 341902 4096 8 10696 10295 248049 308947 4096 16 16426 19287 486698 379541 4096 32 11924 24561 502882 764609 4096 64 24095 31821 315975 593949 4096 128 35747 26949 1185243 996349 4096 256 37396 45672 1684828 491839 4096 512 48111 36962 371016 1116387 8192 4 6209 8247 184945 250673 8192 8 5759 8552 339550 268299 8192 16 9830 15230 329353 244982 8192 32 9276 19177 852349 492162 8192 64 23140 23849 589474 598343 8192 128 23272 39253 864226 448362 8192 256 25498 30435 406832 706513 8192 512 26823 33033 704630 365436 16384 4 4639 5612 305837 247451 16384 8 6931 6763 207562 172258 16384 16 9137 12191 386971 505398 16384 32 16982 22308 612922 486128 16384 64 27631 27762 756415 612370 16384 128 21432 33588 551371 493657 16384 256 26773 38561 1019413 831091 16384 512 31607 51206 464054 737089 32768 4 6130 6412 328323 271044 32768 8 7890 10178 486692 362678 32768 16