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 Jul 16 03:34:56 2026 Auto Mode Machine = Linux oleg344-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-oleg344-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 1322 4554 496362 435202 64 8 1867 1624 727850 586352 64 16 1675 16398 889431 647135 64 32 2466 11229 1143223 1101022 64 64 1873 13083 1484662 769584 128 4 4447 6032 554157 526444 128 8 3516 6330 576161 688467 128 16 6556 29899 1206978 640042 128 32 4522 10601 1114289 853794 128 64 7540 67152 1306873 1209698 128 128 9215 24024 1121270 1521718 256 4 1475 3673 161299 142542 256 8 7046 13168 778183 748875 256 16 7746 21575 900936 603970 256 32 5588 19232 1180188 725106 256 64 10428 10770 941213 694167 256 128 13194 61039 439013 1407621 256 256 9908 36545 1652404 1802167 512 4 3386 4409 164889 454320 512 8 7427 5664 92353 510478 512 16 14995 10414 676201 893740 512 32 14607 37193 811349 689222 512 64 7370 21224 1365383 1179413 512 128 7904 37088 244370 1075459 512 256 11437 35834 516122 1329871 512 512 14308 72646 1417662 1975959 1024 4 7640 5156 132606 478504 1024 8 11585 15278 869989 916786 1024 16 20161 16959 550227 382665 1024 32 11064 35352 1095150 709114 1024 64 17907 32936 303321 1301187 1024 128 26132 57460 1387350 376196 1024 256 22271 44027 653445 266655 1024 512 25600 77864 1554004 907105 2048 4 5118 5615 336019 604337 2048 8 12042 11559 474613 173780 2048 16 10691 9627 464727 586311 2048 32 14545 25196 1386635 595497 2048 64 20048 42386 946360 371749 2048 128 26422 57021 777242 1399968 2048 256 33850 47002 539507 343503 2048 512 36053 36575 1804302 184555 4096 4 6590 5872 506246 377406 4096 8 8889 9146 407117 321914 4096 16 23104 18295 566996 513156 4096 32 17460 18156 395059 388906 4096 64 28166 21901 782581 751170 4096 128 31775 47351 340284 583717 4096 256 32753 36659 439486 600509 4096 512 34157 71300 804873 305583 8192 4 4784 1942 407725 253316 8192 8 14037 9385 339859 454020 8192 16 17620 13706 697960 471211 8192 32 25522 25245 785279 729989 8192 64 25761 26981 546131 533678 8192 128 36868 74826 655835 482107 8192 256 30654 37159 910509 676575 8192 512 28237 48934 930381 544176 16384 4 7077 7275 358519 264143 16384 8 17750 15810 292832 429553 16384 16 20667 14025 293788 950900 16384 32 30842 20146 376973 361733 16384 64 18471 28422 591456 938639 16384 128 25809 26470 544555 522717 16384 256 30538 38685 657597 433015 16384 512 20178 27892 367329 289843 32768 4 4914 5618 237667 178211 32768 8 8120 9741 339065 264875 32768 16 13885 14435 810085 403086 32768 32 17702 18772