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: Sat Sep 5 19:44:52 2026 Auto Mode Machine = Linux oleg130-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-oleg130-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 2674 10129 566551 57767 64 8 4666 12009 863676 889431 64 16 4001 30404 1638743 1734015 64 32 4025 66595 1083249 1002351 64 64 4655 48666 1638743 1330167 128 4 3569 11134 542400 477725 128 8 3557 7830 368779 285144 128 16 7208 21404 178789 962469 128 32 6753 14687 1278855 535368 128 64 6893 37036 1243315 1093856 128 128 8600 50591 261785 1852520 256 4 5771 3686 422432 254754 256 8 7853 18349 718796 768712 256 16 6030 25048 608074 755195 256 32 9187 22143 1163562 1089202 256 64 18279 89412 1339154 1300235 256 128 17696 50682 1778290 1610276 256 256 12096 41639 1718521 1570244 512 4 2685 9095 514021 466357 512 8 11551 20821 592604 620694 512 16 9715 19635 1091863 545904 512 32 14893 26187 589837 1049187 512 64 19966 79442 1155924 1171691 512 128 20993 74560 1195832 1005938 512 256 11310 44618 2256220 1614885 512 512 22807 87045 1705969 2065273 1024 4 8608 6683 432054 166073 1024 8 21943 27684 1289855 535278 1024 16 24177 28791 1317957 1470977 1024 32 39654 97699 1374474 1028043 1024 64 49557 27599 1211964 482103 1024 128 18617 48549 573671 1323236 1024 256 9803 88335 717645 956817 1024 512 37129 108623 1479591 2443368 2048 4 9906 14267 705202 218196 2048 8 9834 20546 482098 298668 2048 16 29733 16197 946048 1027528 2048 32 38751 21459 351818 1089428 2048 64 15505 33009 1481072 665793 2048 128 50215 45858 1222626 1384846 2048 256 46334 48543 1576480 737472 2048 512 30171 45664 359053 1536439 4096 4 10584 6200 275028 114502 4096 8 10341 14846 301576 176468 4096 16 12146 17861 445307 515481 4096 32 6870 26785 1665070 424626 4096 64 28976 39603 845765 1207909 4096 128 18744 36362 609154 888730 4096 256 33879 46645 729078 338367 4096 512 44681 73944 1042480 740422 8192 4 6319 5597 155824 121314 8192 8 7320 8447 461732 434818 8192 16 16148 2418 510820 421184 8192 32 16224 22283 378946 204467 8192 64 25455 26342 569286 269243 8192 128 22052 33802 478222 366649 8192 256 25606 29873 547741 374714 8192 512 24062 52462 1125891 821005 16384 4 5063 5903 464396 393515 16384 8 13298 12561 370535 366580 16384 16 21920 21829 761697 590628 16384 32 35541 27321 391054 439167 16384 64 27453 24748 712378 459616 16384 128 23591 36243 388698 273248 16384 256 24229 34025 735268 360271 16384 512 28526 49394 904991 609070 32768 4 4885 7606 191059 203239 32768 8 9740 12350 610715 415599 32768 16 16901 23049 507724 589194 32768 32 20683 18413 914334 957623 32768 64 27137 22284 976019 859961 32768 128 30656 28784 667196 318448 32768 256