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: Fri Jul 3 23:44:55 2026 Auto Mode Machine = Linux oleg460-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-oleg460-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 1235 6392 170672 307554 64 8 5185 10608 735831 603489 64 16 4241 19494 409946 966270 64 32 5822 36823 438043 727850 64 64 2169 50111 1638743 1484662 128 4 2159 6059 659704 537512 128 8 3358 12701 667081 304037 128 16 7706 12351 955616 955616 128 32 2949 9291 1076312 942199 128 64 7372 51341 1373754 540217 128 128 9801 54055 353482 460514 256 4 3983 6347 649647 423766 256 8 5412 10323 377041 295243 256 16 8311 29723 1382252 443730 256 32 13480 28218 823544 1152323 256 64 8951 17591 1439707 2081678 256 128 12674 78600 1368162 1084800 256 256 13318 60107 1752173 2131261 512 4 5100 8868 649020 309578 512 8 9057 14510 544106 768658 512 16 7680 20684 770866 450697 512 32 23013 38055 1350783 607353 512 64 18985 44739 1510391 513039 512 128 15750 48306 720921 691887 512 256 21465 48301 816594 1500891 512 512 9696 73426 1399189 1772135 1024 4 10576 7542 296720 361839 1024 8 14708 12820 334634 536347 1024 16 13543 10893 469713 806899 1024 32 11712 17494 454936 270399 1024 64 20904 37917 228106 1090423 1024 128 19283 35184 582778 109529 1024 256 26268 39091 497574 1074331 1024 512 16806 47350 825827 1643814 2048 4 5070 5637 346357 181621 2048 8 10246 7765 555630 799375 2048 16 12299 23408 638808 489599 2048 32 12699 15135 595497 904222 2048 64 17186 42186 481881 246159 2048 128 33333 67357 413558 338295 2048 256 30169 33905 298025 236710 2048 512 26604 42865 432332 451204 4096 4 7562 6530 263592 196169 4096 8 8646 11216 485529 606723 4096 16 8220 16553 357729 722912 4096 32 16246 20042 255330 441950 4096 64 16407 37586 576644 844850 4096 128 37976 55655 1542205 359555 4096 256 35334 69238 614932 829152 4096 512 53730 47562 1723881 1096087 8192 4 6343 8192 230701 174774 8192 8 12057 2786 508289 375467 8192 16 21022 25056 833796 639741 8192 32 19014 28588 474458 859599 8192 64 34983 48394 996980 1190367 8192 128 32281 45933 875500 550462 8192 256 29809 48107 649021 402811 8192 512 39498 60425 1138576 882856 16384 4 7431 6375 325932 380527 16384 8 10230 13355 434406 331800 16384 16 16879 19125 725441 416197 16384 32 20803 27647 650778 674237 16384 64 27103 34045 648432 867332 16384 128 36946 40986 972512 684008 16384 256 35771 61976 952719 766498 16384 512 37062 48380 959302 651450 32768 4 7215 7964 218370 414900 32768 8 11609 12602 459045 305360 32768 16 14282 19946 320212 408874 32768 32 20974 24694 581590 432986 32768 64 23842 39303 590095 402337 32768 128 34406 47303 734874 916480 32768 256 35761 39408 895794 742869 32768 512 42726 45337 803709 897708 65536 4