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 Sep 25 23:16:30 2026 Auto Mode Machine = Linux oleg350-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-oleg350-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 3607 8080 400168 344233 64 8 3573 30432 829001 801764 64 16 3819 25580 1049372 695778 64 32 5192 26489 1083249 1083249 64 64 6304 69330 1336792 2689580 128 4 5795 18792 669577 537512 128 8 11615 21962 609522 435487 128 16 4487 54329 715059 475609 128 32 7555 51180 90598 780556 128 64 10362 82585 1294270 1294270 128 128 9801 48393 1521718 1778862 256 4 9522 11865 694167 432297 256 8 8232 15513 886067 470566 256 16 13394 23967 630572 947860 256 32 14949 25842 1040643 1142514 256 64 23802 55485 931416 455398 256 128 16509 34348 1422540 973645 256 256 18851 129556 1600674 1985448 512 4 7218 8307 589837 513530 512 8 10621 12789 878386 241839 512 16 17901 36137 478089 231265 512 32 28759 53195 1267097 184764 512 64 23736 33303 107768 1293037 512 128 26213 57123 768658 684390 512 256 38421 93345 1426135 1160923 512 512 26708 71437 161055 1977778 1024 4 11718 8086 397064 267569 1024 8 20184 20273 311708 269533 1024 16 26661 33996 429161 935151 1024 32 28827 34447 1031252 308063 1024 64 28444 52133 642016 953418 1024 128 24131 109214 384103 895941 1024 256 39726 64512 180728 718005 1024 512 27850 100618 908640 1296083 2048 4 12185 8862 294006 332571 2048 8 11846 21427 683324 747158 2048 16 20200 25776 494191 535972 2048 32 35435 38154 902986 399907 2048 64 28792 69039 1266427 836915 2048 128 34303 32663 1544450 1225591 2048 256 37871 61081 1347481 512654 2048 512 44519 62149 1398828 1441069 4096 4 8147 8554 355891 204698 4096 8 11741 15182 638898 411693 4096 16 17451 33751 461516 859775 4096 32 22320 35142 443056 817746 4096 64 36356 34443 968545 703291 4096 128 26964 63420 1451516 412315 4096 256 37410 104590 1075637 583044 4096 512 42534 55935 563259 1196635 8192 4 8008 9914 394699 335135 8192 8 12445 13757 588837 325608 8192 16 20213 23227 889070 624191 8192 32 28231 33548 1191358 652646 8192 64 26932 42028 877177 590243 8192 128 39377 49722 587538 662039 8192 256 44668 55410 693004 873542 8192 512 38653 62749 987099 1407043 16384 4 9089 11331 490010 305649 16384 8 17399 18570 544046 376263 16384 16 23979 21444 426567 504493 16384 32 25104 31074 772286 624076 16384 64 28594 34016 710529 1089871 16384 128 36278 47473 971014 845457 16384 256 43789 59280 612900 412321 16384 512 44190 52893 602000 963188 32768 4 7913 7296 238543 207990 32768 8 9586 12548 304009 444746 32768 16 17780 19542 341606 307146 32768 32 23831 32200 793564 399887 32768 64 36140 40953 571776 683236 32768 128 33213 46539 577929 585654 32768 256 39115 52957 670693 725934 32768 512 57175 69718 849175 522689 65536 4