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 22 04:17:15 2026 Auto Mode Machine = Linux oleg134-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-oleg134-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 3094 7554 647135 621657 64 8 5212 16753 842003 727850 64 16 10472 15522 1143223 913649 64 32 4009 32736 415659 18620 64 64 6091 81944 2278628 1599680 128 4 4408 8488 329004 556454 128 8 10046 18760 955616 722760 128 16 8521 47144 1111981 947186 128 32 12030 48687 1196221 902598 128 64 12324 77719 450846 1421023 128 128 12372 74942 1220700 1911894 256 4 4802 5743 508929 595264 256 8 11233 17809 941213 842278 256 16 13651 40718 941213 1044693 256 32 11096 95521 1292410 1128110 256 64 12848 79851 1254656 1132871 256 128 10361 35054 255239 596919 256 256 33208 78773 2000242 1213534 512 4 6479 6975 173606 250003 512 8 10368 18364 338837 465447 512 16 14744 15508 599553 655558 512 32 26893 38844 1488408 477557 512 64 17192 37508 839252 675350 512 128 6199 36657 930933 629796 512 256 22634 86718 1411141 1373241 512 512 29345 112753 1736314 990168 1024 4 3191 4608 792019 326320 1024 8 9841 5784 77487 183015 1024 16 6882 11490 337076 859026 1024 32 8172 40226 340092 247465 1024 64 10451 32027 1211622 95701 1024 128 15670 56608 686337 495393 1024 256 38961 32548 546725 381103 1024 512 27762 74907 605538 740408 2048 4 2763 6188 351645 449315 2048 8 8247 14293 886583 626691 2048 16 20656 26273 1170162 382304 2048 32 23528 44809 1111705 443104 2048 64 41832 51122 1411470 841424 2048 128 45830 50927 1368084 1312882 2048 256 36116 24104 1098063 1483118 2048 512 44049 64124 729828 1546675 4096 4 5465 6262 367186 225763 4096 8 10850 9696 337948 407271 4096 16 9444 14932 1004682 450751 4096 32 21253 25900 558952 486808 4096 64 17538 41260 1309460 914513 4096 128 23231 26116 150134 572475 4096 256 20746 39863 1736251 405263 4096 512 30767 46933 1070810 875594 8192 4 4578 7489 369858 656875 8192 8 6878 7727 625589 181940 8192 16 12129 8711 291044 185857 8192 32 14829 42334 679330 684541 8192 64 25633 30353 1370562 406187 8192 128 16246 29033 412651 795883 8192 256 37153 52215 564460 1749672 8192 512 70011 72253 1333747 734311 16384 4 4230 7285 695472 506901 16384 8 8280 7211 323129 227054 16384 16 9418 15686 281638 402910 16384 32 17310 20955 564418 376539 16384 64 17097 16895 1071835 412175 16384 128 25291 42888 621497 332095 16384 256 20846 23662 1001394 527816 16384 512 26035 28982 704051 272830 32768 4 4473 7772 154362 219614 32768 8