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: Wed Sep 16 19:49:36 2026 Auto Mode Machine = Linux oleg607-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-oleg607-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 5720 7934 125978 565358 64 8 3111 23348 939223 809014 64 16 3922 11218 1029254 829001 64 32 4956 36468 520419 877797 64 64 4279 70256 842003 1526887 128 4 2661 9336 533241 544601 128 8 2963 6228 375222 695603 128 16 4202 49614 1111981 386848 128 32 9238 62530 1377278 1085013 128 64 13171 21195 253503 1421023 128 128 11164 135306 1598754 1421023 256 4 7075 7800 573946 317224 256 8 15340 19253 847597 707430 256 16 8556 14774 958864 955451 256 32 16930 65005 1093639 1158540 256 64 25708 110537 1062263 1058076 256 128 22397 88273 1718521 1619994 256 256 29374 152027 1292410 1907837 512 4 9362 10683 147717 469312 512 8 9507 19462 981121 168419 512 16 24644 32745 1053304 891884 512 32 30285 64119 1205228 1225169 512 64 17142 82835 1087440 668413 512 128 18096 25274 577155 1296159 512 256 16504 64460 1323315 1237168 512 512 42895 101407 1541840 2047551 1024 4 9392 4993 339850 386001 1024 8 8388 9544 496137 249986 1024 16 23737 32485 913471 934337 1024 32 39100 59193 1250425 954266 1024 64 41583 55871 1532928 1186518 1024 128 29431 75526 1689730 1298041 1024 256 52101 92954 1412443 1075676 1024 512 45799 100916 931702 955965 2048 4 9823 11679 223604 336453 2048 8 12498 17875 845565 156240 2048 16 19201 31459 586471 923370 2048 32 31729 30948 681751 1067761 2048 64 26425 54214 278380 1261036 2048 128 28576 48888 531134 540526 2048 256 32940 40457 1482862 296636 2048 512 38860 45999 1673209 1561009 4096 4 8371 8543 157188 369413 4096 8 9915 13436 511293 354722 4096 16 9827 20717 403228 438219 4096 32 22206 32041 386196 512070 4096 64 28528 40266 694113 473029 4096 128 18247 34685 945309 164616 4096 256 33747 41807 895726 360688 4096 512 39795 45082 370042 554944 8192 4 5608 2295 319736 462771 8192 8 11271 10889 328971 291654 8192 16 12228 17780 540223 649230 8192 32 24048 30178 629866 666987 8192 64 27119 39907 927318 773122 8192 128 34677 43665 1116852 726685 8192 256 36478 54140 1210582 811561 8192 512 41514 60321 626387 713215 16384 4 5327 7363 264697 138931 16384 8 10183 12209 563607 642635 16384 16 15110 20596 809685 587703 16384 32 26288 28737 996283 797008 16384 64 27479 48046 781713 875019 16384 128 36780 57830 568611 573490 16384 256 34743 58382 953446 724600 16384 512 47372 57976 1438946 1087991 32768 4 8556 8347 347900 256474 32768 8 12099 11690 342672 272123 32768 16 18190 20213 729572 450141 32768 32 24562 34753 844054 755770 32768 64 30504 52179 1177189 827472 32768 128 37514 45594 989133 589267 32768 256 36292 56638 646845 625368 32768 512 40315 59365 1131223 972862 65536 4