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 22:39:50 2026 Auto Mode Machine = Linux oleg160-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-oleg160-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 4014 8187 516414 557144 64 8 3517 17396 688639 645579 64 16 3763 40180 901377 929467 64 32 3078 27777 1143223 771797 64 64 4642 36717 1562436 1690338 128 4 4359 4424 650117 615109 128 8 2381 10620 871818 149180 128 16 4661 20323 1162547 1017175 128 32 9276 62168 1421023 1105114 128 64 10766 108836 1217930 1406136 128 128 9054 46905 1349580 1997245 256 4 6849 5362 579209 219767 256 8 11611 7637 782721 423098 256 16 11983 20784 1201314 520272 256 32 5397 14009 1080434 1122215 256 64 6555 23916 1455317 1237306 256 128 10090 19358 858440 1696795 256 256 11599 113577 1117543 1384034 512 4 3635 4237 584539 567545 512 8 4706 12108 482493 421421 512 16 7249 9928 1096322 405353 512 32 4779 38838 1060063 1152822 512 64 23964 32822 1344020 541909 512 128 27280 32657 1580419 1339827 512 256 14418 22159 1610042 1407442 512 512 17566 52849 1479181 1821745 1024 4 5656 7120 662823 336601 1024 8 8769 7824 558309 472763 1024 16 10688 11437 166505 313048 1024 32 14445 28922 354932 139149 1024 64 8104 17608 480754 134880 1024 128 16832 36451 987392 510952 1024 256 9693 45707 1556257 295008 1024 512 19919 74576 1765437 992182 2048 4 6837 6295 717333 205231 2048 8 10465 13529 616702 708401 2048 16 10933 26498 1219848 466620 2048 32 11600 20787 1351935 1128353 2048 64 12179 16061 498174 1244953 2048 128 22868 38048 1569280 374275 2048 256 31545 40809 1681397 1450315 2048 512 21422 32072 247222 301625 4096 4 3424 5807 153460 107917 4096 8 6103 12237 290805 288718 4096 16 20871 18827 390764 144795 4096 32 13209 13597 192401 262697 4096 64 26940 18676 1428227 312288 4096 128 11387 17761 1248373 421749 4096 256 19324 34793 305964 477991 4096 512 1165 33753 1007864 948807 8192 4 8679 4861 267380 215834 8192 8 7450 6889 302913 283735 8192 16 9785 11924 205256 163457 8192 32 14097 19926 319539 255011 8192 64 16599 27739 662678 589009 8192 128 27449 31970 309773 361119 8192 256 22057 28345 541509 754267 8192 512 24417 31250 1266727 1194713 16384 4 5118 4555 239332 219609 16384 8 9497 8062 359699 271370 16384 16 8922 11347 526833 304433 16384 32 43310 59858 1006822 603640 16384 64 27073 24352 236595 274319 16384 128 19688 24306 1052965 929586 16384 256 24209 23730 497222 280264 16384 512 21994 38647 390922 236142 32768 4 4995 5618 228175 287476 32768 8