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 Apr 23 00:49:28 2026 Auto Mode Machine = Linux oleg347-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-oleg347-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 4265 14340 429630 718114 64 8 7688 20310 926260 659861 64 16 7997 46718 831569 312204 64 32 10566 76372 1232453 1421755 64 64 6324 83447 942521 1879725 128 4 6940 13187 581781 304727 128 8 9815 28526 927549 785122 128 16 18815 45325 1162547 581781 128 32 8662 72610 1121270 1162547 128 64 12520 67303 2066432 934004 128 128 12939 56591 753179 1975201 256 4 11384 11968 425277 567575 256 8 13363 31589 1312954 332447 256 16 18323 56006 1683493 988889 256 32 22607 80053 567575 1219045 256 64 14190 70465 1610276 1894373 256 128 34650 94712 1561112 340351 256 256 23253 97006 1718521 947860 512 4 10722 12397 563229 828566 512 8 15880 21070 836636 553502 512 16 23258 43155 1051242 790153 512 32 28717 75129 1347393 1012101 512 64 33659 111304 1340664 745186 512 128 24498 118515 1022219 1550747 512 256 40031 56618 819085 1193838 512 512 46439 97916 1245780 2081286 1024 4 13157 15153 609577 593243 1024 8 24513 19015 574285 827099 1024 16 33396 37972 992182 519795 1024 32 37054 49932 1565902 1041758 1024 64 43419 57501 576598 1284839 1024 128 43005 127266 1484193 1537317 1024 256 61999 103120 624376 1232130 1024 512 54567 127376 1131503 1199106 2048 4 13995 13969 421223 425690 2048 8 19658 17351 720160 827482 2048 16 33569 43980 1234397 1124660 2048 32 56523 74310 1348116 1249480 2048 64 68200 106922 1739978 1571864 2048 128 73281 147043 1665101 1043378 2048 256 76198 151210 1503627 1526066 2048 512 84033 102754 1051939 1375312 4096 4 15549 14350 653480 575620 4096 8 23632 23403 835564 613264 4096 16 39207 39316 910249 908804 4096 32 46705 65641 960369 858358 4096 64 59308 70398 779174 506126 4096 128 59982 121166 1409941 1043303 4096 256 66886 111444 1582114 1580803 4096 512 82660 75749 1499795 1444195 8192 4