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: Mon Aug 31 14:45:59 2026 Auto Mode Machine = Linux oleg641-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-oleg641-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 4 807 3490 548044 226948 64 8 1849 4712 703068 503814 64 16 1197 20310 901377 929467 64 32 2082 27657 1143223 307907 64 64 3055 65046 1452528 1183548 128 4 3670 8494 265540 116059 128 8 2854 8680 479432 392505 128 16 6586 15853 1133103 652488 128 32 5020 24634 501839 637004 128 64 5047 40164 1827299 1217930 128 128 5027 80966 1508887 1526043 256 4 2901 3689 539892 238354 256 8 8603 24495 847597 850282 256 16 9842 29466 249776 870268 256 32 7131 28854 1147398 382685 256 64 11908 28773 1354356 1048775 256 128 4132 45037 1523457 1163562 256 256 11679 51518 1445521 1619994 512 4 4747 5789 548834 450697 512 8 3915 20628 297319 483035 512 16 7558 23365 1125630 997991 512 32 16152 50617 1108203 406966 512 64 6085 16412 1254513 36327 512 128 19097 21498 108772 903136 512 256 16659 57930 179019 1242177 512 512 14845 82580 1624659 1450212 1024 4 5644 13537 186731 155340 1024 8 5563 5835 935151 133087 1024 16 15338 16050 517977 74668 1024 32 13866 32433 408623 315370 1024 64 19104 32246 200935 215948 1024 128 20124 29626 1056883 1200447 1024 256 25600 39189 1040748 884137 1024 512 18863 46501 342124 343163 2048 4 3437 4737 321963 257092 2048 8 7294 22141 363829 268731 2048 16 10619 13674 509945 961078 2048 32 10436 21824 1318727 1020448 2048 64 22591 17569 650614 209256 2048 128 19660 25949 193939 937785 2048 256 14070 38942 387810 193480 2048 512 37994 34578 654082 453395 4096 4 3237 8458 202803 192012 4096 8 10105 7020 577633 363673 4096 16 9269 15077 353256 363219 4096 32 14762 44301 566304 293327 4096 64 22556 39413 294166 1177041 4096 128 34760 78288 485021 365033 4096 256 35480 55790 1079354 805817 4096 512 35443 1329 486106 1813215 8192 4 3682 5377 256519 286224 8192 8 7103 8055 355588 263061 8192 16 14373 17197 479765 468596 8192 32 21069 24317 595398 418425 8192 64 16219 25274 671091 485713 8192 128 18178 25200 407560 529745 8192 256 31862 26978 1324901 388523 8192 512 25306 37896 767544 874943 16384 4 4340 4063 388779 272318 16384 8 10423 11708 437233 413099 16384 16 13090 12561 521864 452432 16384 32 16685 25221 357541 702518 16384 64 28427 35793 429384 449455 16384 128 24023 34404 676660 814928 16384 256 41630 49073 1097688 878779 16384 512 30111 49883 1260103 313803 32768 4 5829 5632 295750 150725 32768 8 9090 8554 283453 377008 32768 16