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: Mon Mar 9 20:27:07 2026 Auto Mode Machine = Linux oleg450-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-oleg450-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 7568 14414 1138375 608965 64 8 9906 23944 866463 763021 64 16 8773 39946 1033216 889431 64 32 8802 56089 627470 998622 64 64 9660 81720 2662899 1518251 128 4 10040 16616 687585 522855 128 8 7809 29781 814915 767171 128 16 13602 40583 847059 569439 128 32 10684 80048 1363288 1130717 128 64 7732 99756 1206978 1196221 128 128 16349 111573 1543594 2058509 256 4 8079 16939 648079 762164 256 8 12347 26482 1016025 976301 256 16 15378 47813 1016025 1070737 256 32 14960 45592 1007446 1003679 256 64 24469 90911 1256123 1175022 256 128 20091 112377 1639786 1842366 256 256 31581 122018 842278 3052087 512 4 13347 14674 706221 856319 512 8 21296 29960 1132755 988345 512 16 32759 48558 673867 1007827 512 32 34415 65440 1365383 1187895 512 64 42823 109071 1753325 1091863 512 128 52303 62706 1730717 1418599 512 256 58433 106958 1619757 1809465 512 512 55962 152424 1759070 2381315 1024 4 14571 17394 676819 606650 1024 8 25678 33641 981750 1060013 1024 16 40351 55053 1232130 655539 1024 32 36682 75455 1622698 1326505 1024 64 47188 85891 1302766 1232484 1024 128 42219 96631 1488307 1582636 1024 256 52949 132060 1617808 1889720 1024 512 59328 110869 2085132 1802483 2048 4 15683 16720 794716 606299 2048 8 23585 31365 815308 1045410 2048 16 35275 52013 1467159 1102856 2048 32 50730 59505 1503627 1449336 2048 64 43892 85405 1464907 1444219 2048 128 75984 100510 1640927 1361578 2048 256 72730 119367 1660915 1278301 2048 512 71813 152061 1723915 1642181 4096 4 16413 16152 792436 592413 4096 8 27692 31531 1224875 901792 4096 16 45873 51610 1281237 1023475 4096 32 59980 72531 1693965 1317494 4096 64 61818 100192 2029804 1410984 4096 128 86982 119176 1834318 1678737 4096 256 77533 132908 2253155 1451394 4096 512 77286 115043 1486172 1487846 8192 4 16633 17171 786717 693830 8192 8 27698 30696 955238 1055410 8192 16 40063 49142 1250909 1196627 8192 32 52276 67885 1418780 1166128 8192 64 64803 92141 934201 1452732 8192 128 88119 104002 1310050 1207180 8192 256 74804 113224 1709541 1562459 8192 512 92101 129567 1951835 1613223 16384 4 15997 17132 719351 664959 16384 8 26576 28834 1104037 1005349 16384 16 43542 51718 1267610 1348371 16384 32 54682 69115 1581947 1341972 16384 64 74071 93138 1350040 1468120 16384 128 83049 114676 2027732 1593317 16384 256 91322 131432 1907083 1891701 16384 512 94994 118987 1736313 1789438 32768 4 16221 17878 783477 727398 32768 8 27181 28738 1054887 964363 32768 16 41411 48625 1264099 1227080 32768 32 53450 74307 1611491 1286727 32768 64 68061 90417 1642340 1255909 32768 128 76566 118032 1781732 1377850 32768 256