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: Thu Jul 30 01:53:06 2026 Auto Mode Machine = Linux oleg414-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-oleg414-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 2420 5843 727850 130068 64 8 2513 7595 592827 206360 64 16 3809 39143 653436 418250 64 32 4167 41911 546928 361380 64 64 3623 48186 1124074 1947927 128 4 3887 3357 124137 439767 128 8 1765 3677 702889 684081 128 16 6324 36614 1007629 78388 128 32 7883 10243 1278855 393945 128 64 3432 83875 1206978 1022989 128 128 16786 24558 1040839 1885042 256 4 9972 10326 524593 494172 256 8 9129 15288 744204 389629 256 16 15114 21197 577962 364746 256 32 7006 27592 1293967 1122215 256 64 15576 82129 703260 1066483 256 128 21951 59759 1099237 810490 256 256 25826 31211 559005 2114473 512 4 3726 3569 226150 607353 512 8 13024 19788 904658 330341 512 16 5326 10544 1110496 723105 512 32 9626 23327 1236455 971357 512 64 10006 34238 1145443 305092 512 128 14502 43061 1551867 312779 512 256 25202 65024 1712772 1293037 512 512 16182 54180 505432 2287463 1024 4 3597 5496 540941 482320 1024 8 2236 3777 168749 158809 1024 16 5565 7197 328416 321195 1024 32 10557 9104 397211 1096268 1024 64 9825 19823 330641 203054 1024 128 15170 18456 1021928 1074331 1024 256 4423 27958 128708 486472 1024 512 13960 107259 1076755 1560781 2048 4 6143 3182 151178 125983 2048 8 5069 4474 134312 87394 2048 16 11619 17080 1135963 1019963 2048 32 19512 12101 1264935 149237 2048 64 13835 70341 1434331 417700 2048 128 47002 61573 1518244 988848 2048 256 19811 58739 1180291 1047577 2048 512 32024 62040 415076 811994 4096 4 5774 7975 172310 160376 4096 8 9034 13881 380348 493549 4096 16 22048 16727 644531 361675 4096 32 22806 21660 417749 264734 4096 64 20080 23749 607367 280933 4096 128 20927 30048 700652 269400 4096 256 17694 20647 1713735 775586 4096 512 15251 36951 552624 969912 8192 4 4050 3657 188751 155632 8192 8 5691 9172 151093 169638 8192 16 17368 8081 216421 274788 8192 32 6008 8705 166952 198449 8192 64 7271 18837 690900 678928 8192 128 29802 30735 316341 259495 8192 256 19470 24597 303754 379909 8192 512 17176 22633 538521 423051 16384 4 3249 3885 184531 127293 16384 8 9053 7583 274940 195205 16384 16 9839 13376 863355 727407 16384 32 16704 16817 402200 373193 16384 64