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 Mar 16 09:45:18 2026 Auto Mode Machine = Linux oleg135-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-oleg135-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 1474 5635 444572 145745 64 8 2684 16173 581273 666414 64 16 3041 12052 901377 926260 64 32 3199 20612 1124074 852702 64 64 2528 23659 191629 1638743 128 4 4001 5090 537512 603357 128 8 6359 12860 935631 128505 128 16 5681 41250 942199 29236 128 32 5117 17211 1038825 161815 128 64 5604 40467 262939 1319723 128 128 5457 34830 633247 1802755 256 4 7305 5254 363634 511109 256 8 6906 9665 635047 619655 256 16 7612 38449 1619994 876662 256 32 9884 28014 1142514 549564 256 64 10342 38214 431082 138765 256 128 16004 102272 592636 1274008 256 256 12143 68671 2102055 1814348 512 4 6206 8067 212710 421421 512 8 6022 16403 800163 771143 512 16 8837 22875 742096 239920 512 32 12489 20632 949875 1108203 512 64 15103 63435 388206 68522 512 128 24634 24119 960496 795127 512 256 22073 104278 2073249 1684557 512 512 11523 61969 912733 2256220 1024 4 6965 8671 352977 466955 1024 8 11752 15121 406804 334530 1024 16 18965 23910 818587 805688 1024 32 21669 59376 378018 962391 1024 64 14307 43611 819211 876022 1024 128 8793 25468 1251882 441015 1024 256 14963 47852 1005892 501701 1024 512 19374 47607 1207534 217182 2048 4 7672 7081 229979 385029 2048 8 8040 8433 864891 147593 2048 16 21826 23070 773951 429179 2048 32 24542 40982 972503 800343 2048 64 14839 44686 626279 1024464 2048 128 34333 54495 998968 261953 2048 256 49625 36476 705492 577715 2048 512 44231 61381 1218291 1129688 4096 4 7544 9473 420530 388651 4096 8 14229 12061 275381 353991 4096 16 16318 20045 512773 352524 4096 32 25123 36099 789668 661379 4096 64 35953 40688 623253 693777 4096 128 24517 42949 594730 519927 4096 256 49029 61522 700167 1505315 4096 512 32315 49166 526669 309225 8192 4 6852 11203 382374 364556 8192 8 15205 11848 480328 511619 8192 16 24410 25962 424808 415731 8192 32 29078 37043 560446 566881 8192 64 27119 51390 508311 455996 8192 128 37243 38279 524425 784759 8192 256 31433 39302 689735 323182 8192 512 37877 62978 514669 874364 16384 4 8245 9008 427847 342232 16384 8 12719 18547 675715 481118 16384 16 21402 26094 797618 757566 16384 32 31584 39883 599067 622917 16384 64 38749 36506 956565 965706 16384 128 34653 51305 805868 556465 16384 256 38153 59206 1217873 999951 16384 512 41351 62704 816060 1034794 32768 4 7909 8848 492366 278438 32768 8 16195 18525 579246 655033 32768 16 19718 24562 647564 715318 32768 32 32073 35953 880528 946146 32768 64 29337 33885 1075449 721287 32768 128 29033 36168 733114 512056 32768 256 39167 42608 900791 782330 32768 512 26435 36117 960575 915126 65536 4