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 Apr 30 15:04:04 2026 Auto Mode Machine = Linux oleg330-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-oleg330-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 1075 4653 571375 224480 64 8 4169 19572 842003 831569 64 16 2579 4638 1143223 329852 64 32 3689 54840 1143223 659861 64 64 3060 28343 1255511 1526887 128 4 2326 5687 346859 387966 128 8 3145 15815 947186 673778 128 16 1842 6453 385460 921183 128 32 2851 24261 391646 1217930 128 64 7464 14131 1471662 1561553 128 128 7420 41489 1057236 1858934 256 4 4454 7029 322463 270613 256 8 9266 10257 970126 648079 256 16 6566 17933 727070 1003679 256 32 7429 32282 1407621 1084800 256 64 14553 76034 1304976 600928 256 128 18497 42758 1487577 744204 256 256 8262 48356 1805197 1740810 512 4 4468 5051 513530 102028 512 8 8184 6731 707152 416598 512 16 12611 14983 542320 494720 512 32 7082 24026 247582 1182661 512 64 16126 66589 636894 1257451 512 128 22101 48480 1640796 1026126 512 256 10494 37617 1528669 1652157 512 512 9737 73787 537165 288958 1024 4 3662 5533 665803 143982 1024 8 7245 12435 624376 82982 1024 16 18215 31558 1235319 409910 1024 32 31572 17167 78066 610965 1024 64 18391 47964 325085 833196 1024 128 21692 56605 460398 960669 1024 256 23735 66567 709582 1542286 1024 512 30805 64305 550297 1718120 2048 4 5943 5866 174642 225749 2048 8 9055 9251 937683 849159 2048 16 20459 11885 252743 291779 2048 32 17821 38716 1307088 457865 2048 64 22085 22921 1443248 77631 2048 128 17687 37841 487737 522031 2048 256 25139 58789 1695335 401327 2048 512 25925 35396 1192085 1576769 4096 4 5291 7302 359134 383986 4096 8 11264 10602 443147 236530 4096 16 19960 15498 437037 197254 4096 32 14851 18710 469179 660845 4096 64 32300 35016 1520368 384089 4096 128 33055 37500 1671225 1106108 4096 256 45908 58728 1266876 389170 4096 512 28495 25469 1196219 468808 8192 4 4252 4683 295461 212957 8192 8 7943 8144 381661 374420 8192 16 12755 17030 625350 493583 8192 32 16051 20352 577874 327707 8192 64 17397 23086 526813 405966 8192 128 21366 29100 530465 377128 8192 256 21320 36612 429798 414828 8192 512 19538 35272 418853 549098 16384 4 5214 5316 285246 251396 16384 8 8095 9232 431089 397786 16384 16 13349 14064 410535 299431 16384 32 17453 22858 820180 278053 16384 64 21059 23899 1102779 408121 16384 128 25245 33564 786859 667018 16384 256 25548 43632 698796 668101 16384 512 29619 50215 555731 319002 32768 4 4713 5020 247128 224341 32768 8 7518 7485 309403 290802 32768 16