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: Sat Sep 5 15:35:59 2026 Auto Mode Machine = Linux oleg440-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-oleg440-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 2188 1792 35931 500060 64 8 1993 21482 771797 712397 64 16 3377 17062 926260 752329 64 32 2548 21249 1124074 969761 64 64 3487 63613 1357066 164906 128 4 6799 5558 556454 476031 128 8 4518 5703 795593 640042 128 16 6720 10146 340264 819893 128 32 5738 28861 1172704 334331 128 64 6916 23050 895074 359638 128 128 4004 59396 554157 1755594 256 4 7205 3366 572416 355566 256 8 3180 5834 266119 270068 256 16 9837 12691 1031644 423933 256 32 7110 28255 534517 952062 256 64 5888 31260 1230218 365242 256 128 8685 33956 1126926 1168627 256 256 14690 120702 438475 1911233 512 4 6140 10306 531055 412200 512 8 4636 4763 339963 567545 512 16 21197 38007 558977 498047 512 32 9792 28234 1080328 888930 512 64 10502 37242 1017858 120612 512 128 26701 37152 1187895 717069 512 256 11886 24845 498047 738777 512 512 7999 94015 1255246 91840 1024 4 3493 3041 543198 89998 1024 8 7079 20950 266804 467769 1024 16 7755 5593 640389 810706 1024 32 7410 29900 546447 354932 1024 64 22186 85525 895754 931702 1024 128 26963 48969 417481 562993 1024 256 37840 43568 1264413 413581 1024 512 25143 85000 795098 240536 2048 4 4233 5191 266422 102775 2048 8 7878 11813 860559 234033 2048 16 13896 21338 551846 751538 2048 32 19658 21312 347702 1176412 2048 64 15176 26347 649139 336124 2048 128 18859 23728 551988 713579 2048 256 28300 31383 658494 1201926 2048 512 35961 43194 826447 867424 4096 4 4357 5725 276644 249755 4096 8 9279 11615 141407 308386 4096 16 8367 12321 268520 390986 4096 32 14355 20218 436804 402954 4096 64 33406 26214 710622 442713 4096 128 15014 25941 227883 351615 4096 256 17721 31383 751827 642699 4096 512 37479 43026 779882 700053 8192 4 4419 6420 212183 148161 8192 8 9474 6416 190684 322721 8192 16 13036 18148 481972 233624 8192 32 13606 19079 204461 345085 8192 64 15301 28230 382196 341179 8192 128 30059 27827 482134 473034 8192 256 32085 38828 611396 483845 8192 512 34929 50104 805265 662627 16384 4 4687 4316 207628 156501 16384 8 8196 8714 202463 403717 16384 16 14129 13293 202321 304671 16384 32 18066 26815 479078 236903 16384 64 21226 38047 577961 263353 16384 128 22873 29855 389326 274715 16384 256 19900 37250 642203 833834 16384 512 31445 39679 355393 456226 32768 4