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: Wed Apr 15 11:08:40 2026 Auto Mode Machine = Linux oleg457-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-oleg457-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 3879 8269 492717 481234 64 8 3989 8724 194545 603489 64 16 6159 29976 942521 799377 64 32 3464 7002 1049372 463774 64 64 7892 44815 1526887 1452528 128 4 3977 7040 165813 462100 128 8 15609 26396 800337 1243315 128 16 1593 48159 624409 630273 128 32 7453 14606 711270 1007629 128 64 11940 43956 1294270 1406136 128 128 16509 56812 1254941 1294270 256 4 4726 13297 294595 526652 256 8 10754 9168 738065 690151 256 16 10398 23798 133403 864661 256 32 18288 67088 1023775 746272 256 64 40398 119960 1437779 876662 256 128 7206 141751 731030 272329 256 256 19011 48139 172743 1514860 512 4 12908 6873 517739 450318 512 8 7935 21124 633699 657163 512 16 19123 14428 347163 840566 512 32 10646 18109 566348 725303 512 64 13834 31892 133968 108361 512 128 17715 52097 618371 1042566 512 256 41104 155820 1026126 1625889 512 512 24760 77611 1112797 2124526 1024 4 8395 9994 250803 455322 1024 8 15642 13303 235614 418988 1024 16 20140 38173 395055 377984 1024 32 34978 48347 393968 833196 1024 64 51358 83858 929082 702273 1024 128 30921 72116 1276817 878171 1024 256 16220 68102 1374474 625103 1024 512 45828 57784 1030263 620587 2048 4 13745 7430 337127 214722 2048 8 8644 14370 531693 336348 2048 16 6275 15937 1127760 373657 2048 32 19497 30978 839368 432419 2048 64 25846 23871 777524 218196 2048 128 44854 80702 475190 1209712 2048 256 18287 35915 565618 877795 2048 512 27617 37317 1538641 1340333 4096 4 1109 7206 347441 276533 4096 8 7325 11764 333552 353409 4096 16 11565 31539 541084 607259 4096 32 32048 43813 948597 1000935 4096 64 26539 27078 523987 539504 4096 128 16513 34243 1049164 782118 4096 256 26021 43656 766896 788472 4096 512 38649 39946 596403 327811 8192 4 6334 10852 646408 310008 8192 8 24707 29002 563063 589990 8192 16 18330 16211 454627 693592 8192 32 28640 97349 276113 648103 8192 64 22350 21352 1408774 856449 8192 128 35238 116652 1303242 741681 8192 256 32636 41582 997443 933338 8192 512 81754 91414 1841278 1652005 16384 4 13625 10007 224484 420447 16384 8 13758 22800 637018 426546 16384 16 20796 25469 350002 337167 16384 32 21206 22042 711574 294888 16384 64 22899 42956 535353 412737 16384 128 28867 50810 1054047 724798 16384 256 45997 44803 981078 993934 16384 512 39384 44190 702424 509452 32768 4 5802 7929 186817 178967 32768 8 11511 14292 279853 269962 32768 16 14093 15405 524152 385942 32768 32