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: Tue Apr 28 20:12:00 2026 Auto Mode Machine = Linux oleg327-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-oleg327-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 6103 11508 150569 100809 64 8 5386 34135 186568 213925 64 16 11836 31433 359444 432398 64 32 16289 64701 645579 610350 64 64 7096 105276 1033216 1562436 128 4 7053 11557 97350 63371 128 8 8096 25896 212638 130346 128 16 8490 48280 800337 472262 128 32 20546 70337 551878 592699 128 64 11000 90142 927549 809997 128 128 13521 107744 771581 1406136 256 4 11725 12394 132645 112518 256 8 14317 23458 107613 237458 256 16 22688 36560 386126 517016 256 32 29028 65979 639967 600928 256 64 27150 103018 721210 970126 256 128 33534 98800 1729594 847597 256 256 23605 156663 1506359 735537 512 4 15391 13800 76499 106825 512 8 19270 32751 246276 229903 512 16 32559 51874 180737 425935 512 32 45070 67484 678122 544658 512 64 46469 112035 932550 764281 512 128 46643 159311 1147892 1155924 512 256 47792 153022 1510391 991998 512 512 54300 173845 1821745 1523247 1024 4 13159 18028 112085 118492 1024 8 26174 31669 103551 153064 1024 16 33058 45492 402044 282809 1024 32 56017 74929 743613 555852 1024 64 67931 117699 1315938 837257 1024 128 53170 85233 1256277 1139005 1024 256 69456 156620 1514549 1379773 1024 512 86948 170870 1554004 1492963 2048 4 16307 17637 161821 135138 2048 8 27687 32282 236814 266836 2048 16 40839 54831 501227 500380 2048 32 56996 80964 746120 580840 2048 64 82308 101951 1052971 758238 2048 128 68384 134655 1633127 1224892 2048 256 85294 139528 1543340 1373553 2048 512 99897 137904 1617749 1538641 4096 4 16173 16778 161929 165795 4096 8 26763 30218 242209 272701 4096 16 42897 51756 392828 422620 4096 32 47591 81595 606274 612368 4096 64 58753 81859 958601 931319 4096 128 69711 117263 1278758 1177041 4096 256 79849 142425 1551537 1146103 4096 512 90186 99866 1927548 1521580 8192 4 16248 17875 167030 108165 8192 8 25709 31947 271915 242840 8192 16 42353 48893 513446 453924 8192 32 56787 76414 633571 589059 8192 64 74079 102822 1139860 854044 8192 128 93919 126259 1305470 979194 8192 256 102466 102641 1433459 1461817 8192 512 92674 148284 1666750 1364629 16384 4