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: Sun Nov 16 17:50:37 2025 Auto Mode Machine = Linux oleg221-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-oleg221-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 1858 18238 208606 36158 64 8 3109 29879 334788 388021 64 16 8706 46403 615952 598110 64 32 9787 72319 1124074 831569 64 64 3609 90785 695778 1255511 128 4 2107 17334 255433 215800 128 8 7851 22783 328199 336848 128 16 6302 54214 669577 584313 128 32 7153 67583 901083 684081 128 64 4669 96597 1196221 1067750 128 128 18362 138055 414314 1579934 256 4 10334 13221 299776 124149 256 8 15396 26742 275261 382004 256 16 18592 59895 608074 323630 256 32 10039 73328 792543 733527 256 64 17017 113373 1028679 684432 256 128 10439 149717 870974 1280084 256 256 18143 156275 927393 1881098 512 4 14562 14874 152111 240700 512 8 8920 20687 466661 387576 512 16 22895 38168 302045 599553 512 32 17754 89371 819085 839580 512 64 20113 44479 969603 542320 512 128 41180 87685 1337324 1289930 512 256 18006 152154 705294 1391032 512 512 48512 169255 1630828 2081286 1024 4 8373 8952 60090 116153 1024 8 10668 19073 275357 168888 1024 16 30990 17323 693317 272838 1024 32 21830 36768 865605 782353 1024 64 38723 56973 1013727 956817 1024 128 21720 110142 890553 1115342 1024 256 14347 83435 1000969 231887 1024 512 29057 143114 1643814 1597351 2048 4 8375 11597 123180 87735 2048 8 17184 20422 178819 279558 2048 16 29309 44704 627057 388161 2048 32 23626 18987 443012 488652 2048 64 37487 32480 1209542 1075111 2048 128 36626 60938 416505 1211077 2048 256 14871 51078 392112 1232980 2048 512 22005 139065 1761024 1564421 4096 4 8010 7743 156646 164294 4096 8 20516 18011 395787 350926 4096 16 25564 16969 365678 631803 4096 32 17023 22595 883883 351558 4096 64 28157 80181 832850 284798 4096 128 39118 55744 689102 487153 4096 256 43143 70404 1542205 1356290 4096 512 33731 31559 1246923 1270061 8192 4 2153 8866 206774 236032 8192 8 15442 18863 199202 247575 8192 16 23389 26262 400352 437370 8192 32 28634 35502 642913 557210 8192 64 34289 51922 580451 446718 8192 128 40624 45275 1066416 597292 8192 256 43393 43367 451722 1001951 8192 512 38368 47977 1015004 171498 16384 4 7529 8334 188321 97317 16384 8 12946 17700 196594 227960 16384 16 24624 27549 303378 370116 16384 32 29296 39552 629185 562560 16384 64 39413 43335 523869 668680 16384 128 41565 53077 534603 1057567 16384 256 50806 86427 1338548 821052 16384 512 48821 53223 1301953 887827 32768 4 7422 10456 268223 191398 32768 8 16436 16954 265302 203365 32768 16 25503 27424 321402 408313 32768 32 30127 44805 655426 577399 32768 64 36588 61622 982459 748403 32768 128 44402 70721 1284310 977977 32768 256 52428 70199 1091722 1007441 32768 512 51353 67769 543308 647488 65536 4