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 Jun 1 14:08:22 2026 Auto Mode Machine = Linux oleg442-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-oleg442-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 2724 10147 78060 516414 64 8 3153 3232 693980 688639 64 16 4136 19156 763021 679917 64 32 4243 47095 508587 842003 64 64 2715 30161 1105556 1255511 128 4 4881 7171 268999 450846 128 8 8047 11435 56389 549056 128 16 6778 27153 881842 901083 128 32 8554 44414 962469 901083 128 64 3635 39592 1102844 1152564 128 128 3961 32878 1231904 1885042 256 4 2331 11235 368375 467290 256 8 3495 2793 789628 291239 256 16 7058 5900 327379 462260 256 32 12650 41565 473263 247816 256 64 6386 49951 1202660 433869 256 128 12963 47858 289902 1415041 256 256 11740 39012 541253 2081678 512 4 3527 5603 96278 486207 512 8 8781 13594 442524 536092 512 16 15256 26197 785241 525082 512 32 19574 14713 1316016 702295 512 64 6936 40563 628322 576535 512 128 21027 29298 824431 881269 512 256 12305 106756 1073309 1245780 512 512 35191 56177 1395552 1882427 1024 4 10370 4229 567006 326518 1024 8 14565 10220 378985 184842 1024 16 23055 21253 509437 289754 1024 32 16478 23692 593981 447774 1024 64 17274 21850 1210257 1101046 1024 128 17164 39999 1029275 219749 1024 256 24497 48689 430797 1251882 1024 512 18422 65792 1526390 1226500 2048 4 4874 5216 372490 306862 2048 8 9701 11035 784697 342654 2048 16 12482 8562 276463 496820 2048 32 19218 24822 617989 204698 2048 64 15257 34540 298938 462724 2048 128 23781 29125 484956 753251 2048 256 20882 29890 627057 282129 2048 512 33603 83639 943761 279440 4096 4 1204 4744 324333 254392 4096 8 10362 9475 187615 375361 4096 16 13742 22457 244930 297158 4096 32 14827 30346 813486 394569 4096 64 17884 26238 794121 655574 4096 128 36063 39160 554640 654950 4096 256 36764 50572 859259 1395171 4096 512 30427 36857 277920 339524 8192 4 5044 6121 168527 217328 8192 8 9636 8400 197235 319611 8192 16 14137 17449 191236 242417 8192 32 14606 21107 682203 606229 8192 64 20459 29174 499416 352270 8192 128 24362 33165 732276 477140 8192 256 31109 54333 682664 449148 8192 512 28846 43348 958917 573266 16384 4 4834 5631 206712 282331 16384 8 8099 9477 213652 238063 16384 16 16789 15858 722368 430094 16384 32 15948 28012 430037 308915 16384 64 17066 31068 230730 181735 16384 128 18460 28536 609886 573911 16384 256 29208 37275 699607 808723 16384 512 23569 45788 647357 431864 32768 4