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 Aug 8 08:05:10 2026 Auto Mode Machine = Linux oleg244-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-oleg244-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 1772 5933 571375 538156 64 8 4901 13787 889431 435202 64 16 5806 32110 1163036 886494 64 32 1751 85657 1310683 1049372 64 64 3986 65844 1232453 1828508 128 4 5518 10465 600657 573699 128 8 8468 19848 748976 795593 128 16 4703 12254 876086 353482 128 32 5654 70568 1487977 805138 128 64 13767 30533 1319723 1391557 128 128 12654 74546 914904 513847 256 4 4546 9165 592309 556398 256 8 12327 7998 831194 556687 256 16 12218 31124 1163562 987979 256 32 21087 45277 1208072 850282 256 64 13257 69624 795478 1340826 256 128 15847 85218 1487577 1504249 256 256 22080 76576 1552085 2000242 512 4 6405 5923 559706 266410 512 8 5450 14336 684390 836636 512 16 6681 9265 355319 962218 512 32 13300 26224 660600 891884 512 64 15582 31326 344324 1032044 512 128 12280 41812 452310 149143 512 256 23175 114876 700463 1347393 512 512 28507 95076 321777 1089647 1024 4 6029 7217 341662 309752 1024 8 15326 18104 646851 168530 1024 16 24450 32164 590227 275057 1024 32 24031 32057 945651 710169 1024 64 32503 30615 1434138 837257 1024 128 26534 71719 208172 915809 1024 256 46090 63201 971534 1367473 1024 512 22784 73055 1056883 1497127 2048 4 4888 4425 308061 241250 2048 8 6712 11487 1021904 387216 2048 16 18042 16608 604507 605743 2048 32 16344 26316 517815 1224194 2048 64 30604 45124 1413328 428707 2048 128 38535 31318 1468162 1313685 2048 256 23463 36591 842827 458183 2048 512 26509 76839 1165557 1553669 4096 4 7265 7589 304446 365351 4096 8 10067 15002 532431 528045 4096 16 11450 12550 452544 166178 4096 32 19072 31349 543945 496545 4096 64 14427 31168 706211 581583 4096 128 27352 60950 1125603 1522659 4096 256 32496 23919 1532848 510336 4096 512 81389 115253 1570543 1807492 8192 4 5342 4136 287903 288471 8192 8 5066 5858 387786 334476 8192 16 22874 18585 217861 394057 8192 32 18675 18105 651606 589393 8192 64 14047 23683 1097691 469428 8192 128 34998 85672 2025234 1772783 8192 256 35850 34995 343752 913366 8192 512 56009 80735 1466246 559023 16384 4 8029 5433 160889 142170 16384 8 7907 14087 476653 467591 16384 16 16595 28241 328844 347271 16384 32 12907 21543 499513 645472 16384 64 14685 29136 720240 593474 16384 128 22062 29543 729089 372574 16384 256 21754 47057 949520 686701 16384 512 53831 90123 1479913 867157 32768 4 7138 4890 401751 276364 32768 8 9818 11183 666503 479816 32768 16