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 Feb 9 20:00:07 2026 Auto Mode Machine = Linux oleg358-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-oleg358-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 2373 3950 67858 215471 64 8 2831 12005 420873 112466 64 16 5893 29616 627470 245190 64 32 1557 87075 842003 831569 64 64 2445 18762 1013707 1279447 128 4 4261 9176 265015 257516 128 8 6763 19358 465304 413039 128 16 3648 11056 703810 604036 128 32 6488 32365 969421 780556 128 64 5853 22327 907174 731625 128 128 13268 55053 1111981 1406136 256 4 5932 5312 273787 285432 256 8 11864 26498 137117 297039 256 16 12836 19577 425277 277323 256 32 14863 28290 836374 733527 256 64 22149 60181 672010 606700 256 128 15603 64598 958864 1375171 256 256 17865 75293 1591186 833776 512 4 9893 12107 170208 276601 512 8 10279 20601 455090 101244 512 16 16246 22865 617659 328220 512 32 25250 25159 1216149 793951 512 64 20025 102193 767559 1064266 512 128 16065 71151 801357 775879 512 256 23076 48406 757274 1677976 512 512 23846 152057 1650887 1992458 1024 4 5457 10387 97691 124000 1024 8 13639 11930 118247 186051 1024 16 15123 27889 441559 706780 1024 32 20875 28747 910953 302530 1024 64 13026 25926 888894 919140 1024 128 11575 62086 696578 703769 1024 256 32136 44071 1239598 1385560 1024 512 16145 42098 1137798 1592612 2048 4 7771 6278 124970 121803 2048 8 17212 9217 188388 132377 2048 16 14080 13934 819900 773115 2048 32 27399 23962 443584 409106 2048 64 20347 37024 299678 260729 2048 128 17639 50014 1122162 549235 2048 256 22597 43434 317665 432615 2048 512 39136 56710 1074036 1432179 4096 4 7434 4874 110309 125256 4096 8 13180 12477 185692 174082 4096 16 14302 22828 318707 361454 4096 32 16819 24696 533622 370816 4096 64 23267 50768 250169 450456 4096 128 26579 30599 746502 345269 4096 256 23676 61115 742437 1406133 4096 512 53743 97093 272265 629880 8192 4 6183 6571 141207 63396 8192 8 8725 10735 303735 260303 8192 16 13925 20863 3210 544642 8192 32 20512 23982 328770 362284 8192 64 21535 20539 316464 280346 8192 128 25823 43277 634495 653888 8192 256 23546 34381 507748 303408 8192 512 26079 38334 624861 477970 16384 4 6667 6108 93839 91177 16384 8 10705 15450 162208 138290 16384 16 19570 21038 363330 370250 16384 32 19171 22159 620464 256440 16384 64 29258 31712 299798 508675 16384 128 32326 37405 395424 712157 16384 256 33421 54810 932930 575950 16384 512 33058 47641 822694 564612 32768 4 6740 6997 153191 112211 32768 8 9370 12355 201189 147964 32768 16 15970 16306 281282 233578 32768 32 20994 19648 327084 410266 32768 64 29639 26609 580663 511064 32768 128 22422 36883 727110 532639 32768 256 28986 47613 1034730 714741 32768 512