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 Sep 30 08:34:32 2026 Auto Mode Machine = Linux oleg255-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-oleg255-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 3403 11920 627470 555990 64 8 1346 5334 720041 674790 64 16 4113 22238 1143223 1033216 64 32 2844 42951 1204796 1033216 64 64 2948 52502 1330167 1204796 128 4 4375 9378 633995 492178 128 8 2557 7255 895074 739689 128 16 3890 18097 1048974 44180 128 32 6791 35496 1349580 731625 128 64 2246 21614 1440082 1598754 128 128 10128 77911 1642783 1705404 256 4 8159 11845 1226004 764334 256 8 11571 10580 873809 316010 256 16 6775 8446 965763 937924 256 32 4252 34033 1368162 1147398 256 64 8771 33433 999940 1080434 256 128 9135 68157 1003679 977189 256 256 16998 109545 1610276 2061693 512 4 3558 2467 612550 80061 512 8 5923 15229 560144 764281 512 16 6954 13119 643960 876593 512 32 6707 26766 1113374 1034530 512 64 17274 43933 1357615 806171 512 128 16999 22228 653762 87610 512 256 17215 71981 1296159 744153 512 512 28835 77541 1496706 619978 1024 4 2764 3693 271819 263110 1024 8 14720 17519 877454 212403 1024 16 13657 20294 379957 460003 1024 32 10266 18676 697483 688096 1024 64 21570 18041 417806 441378 1024 128 30267 51895 1372717 239316 1024 256 10607 31767 157585 942745 1024 512 20041 79725 785213 678530 2048 4 8130 10581 154565 230863 2048 8 9790 15773 752657 649532 2048 16 25798 27743 322108 397060 2048 32 25084 33707 959682 354519 2048 64 44664 74138 1587551 972503 2048 128 37697 88804 1097642 993767 2048 256 18785 27926 1488257 201099 2048 512 50921 92193 1105837 812686 4096 4 9706 5395 228992 374233 4096 8 14192 13769 201179 417070 4096 16 30366 38795 784082 645864 4096 32 39389 54781 1049485 921676 4096 64 40497 34821 1456685 532646 4096 128 17875 22795 412810 657481 4096 256 40006 65774 849445 1405558 4096 512 50128 30531 1304885 962845 8192 4 11025 9248 183467 196010 8192 8 7542 10035 265146 307877 8192 16 2671 24827 316820 351935 8192 32 26523 36443 624145 494991 8192 64 30172 58255 1262445 552506 8192 128 28818 41058 452621 770003 8192 256 20492 46384 587619 684841 8192 512 37878 54414 1049030 780126 16384 4 5617 5172 265495 230416 16384 8 8952 11252 240421 181090 16384 16 18327 14741 532623 218759 16384 32 32043 32214 830790 674071 16384 64 26667 36996 341397 523366 16384 128 23494 31954 759643 452507 16384 256 26245 39540 561558 569384 16384 512 33009 42273 1008684 1042233 32768 4 7023 4599 131189 428177 32768 8 8168 6677 274346 430206 32768 16 19696 26247 496770 310759 32768 32 34053 42937 336527 419784 32768 64 26669 25458 751316 370532 32768 128