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: Tue Jun 16 06:45:33 2026 Auto Mode Machine = Linux oleg621-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-oleg621-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 2367 8399 225423 542506 64 8 3263 14956 725882 639427 64 16 2990 25838 598110 77207 64 32 4358 46379 1163036 1143223 64 64 6543 20440 1460430 102895 128 4 3136 5705 318465 251956 128 8 4523 15617 643108 423798 128 16 10257 19777 503723 350711 128 32 5982 67085 1111981 1040839 128 64 9777 70448 908709 1152564 128 128 7056 37187 1598754 581781 256 4 7714 7292 598249 506050 256 8 12167 20453 984356 402481 256 16 5720 13228 1185399 941213 256 32 7431 40795 1208072 1112909 256 64 7537 16915 175711 1398455 256 128 9810 67438 782721 1447470 256 256 17586 68265 1369908 2097948 512 4 4500 6751 436497 365727 512 8 12664 19927 570713 493696 512 16 12524 12366 213238 133402 512 32 14217 18731 1113374 911184 512 64 10585 25719 1350783 714207 512 128 12027 54180 1222379 1248678 512 256 14251 94466 1138158 1527582 512 512 18351 42755 1679288 2065273 1024 4 6754 12463 411876 508171 1024 8 10137 12676 790125 530517 1024 16 12197 34573 263449 569865 1024 32 11706 16252 1157109 352254 1024 64 18785 37054 1113030 1145383 1024 128 26380 34418 265435 823136 1024 256 25154 42604 753000 1126458 1024 512 29298 53800 512782 940269 2048 4 6889 6790 236404 325391 2048 8 8908 18948 522730 271114 2048 16 12517 19317 676116 884665 2048 32 12319 20788 612831 288982 2048 64 25682 32560 617811 924165 2048 128 24368 38717 780491 515206 2048 256 21212 52059 1576480 609180 2048 512 39571 59993 1125839 1113146 4096 4 7283 8682 324694 283165 4096 8 9073 10647 317958 274900 4096 16 28306 22289 708161 457083 4096 32 23816 40814 953917 734314 4096 64 19905 32721 571903 674996 4096 128 47728 70872 1129897 511750 4096 256 35625 51952 745013 861413 4096 512 54898 74782 463283 310656 8192 4 5975 5868 276624 297307 8192 8 11403 24587 449641 578448 8192 16 20575 23479 617749 370612 8192 32 29730 46544 505395 472650 8192 64 28918 46113 956994 845844 8192 128 42004 34609 653888 1503655 8192 256 27999 62102 736372 483784 8192 512 38259 54112 1092560 918272 16384 4 8684 8581 238510 189047 16384 8 17652 15570 428586 440795 16384 16 29772 30932 563159 752242 16384 32 27621 52707 532276 787085 16384 64 29763 38443 1075290 879442 16384 128 36720 48306 1414627 1033052 16384 256 56105 73388 986274 556316 16384 512 41056 58506 1162081 539836 32768 4 8529 7525 336783 364339 32768 8 16621 13267 350936 334972 32768 16 17040 21593 780057 666869 32768 32 23205 26199 629464 326370 32768 64 29069 41519 851712 502185 32768 128 33915 38684 1137186 677764 32768 256 39738 44531 813706 708251 32768 512 32541 46381 720904 849921 65536 4