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 Aug 11 16:29:33 2026 Auto Mode Machine = Linux oleg437-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-oleg437-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 5811 9499 177677 33609 64 8 2687 9835 842003 688639 64 16 6546 28355 1002351 939223 64 32 3131 53915 272300 1183548 64 64 2053 18928 913649 1526887 128 4 2822 4283 677178 95890 128 8 3298 6534 864797 726674 128 16 9474 13725 831319 877518 128 32 7798 44013 1391557 1142750 128 64 5021 101587 1391557 168413 128 128 6566 51366 786271 1579934 256 4 6989 8261 403237 50304 256 8 6786 7130 88309 675391 256 16 8820 24155 837026 552960 256 32 7908 46529 1347557 688381 256 64 9943 88302 1369908 547044 256 128 16406 11344 1361224 638445 256 256 11239 117108 1422540 2097948 512 4 4517 13385 496206 199232 512 8 11887 25260 525082 625212 512 16 22098 38932 807383 177041 512 32 13675 33666 1196499 301536 512 64 12491 74138 1556366 911184 512 128 29702 49873 1496706 1406520 512 256 40547 64574 1073309 1701913 512 512 18842 111570 878027 893740 1024 4 8061 7900 295780 348538 1024 8 14595 16354 196208 418988 1024 16 27150 38177 616932 549382 1024 32 26975 43316 1311117 281622 1024 64 36272 74831 442332 272129 1024 128 46066 72654 551428 963255 1024 256 49435 98027 345593 930088 1024 512 41546 98955 344871 816563 2048 4 8403 11231 233715 231885 2048 8 6214 11352 511220 442807 2048 16 11671 19143 1180454 445217 2048 32 22105 30362 360303 335023 2048 64 27529 19150 695439 653883 2048 128 13740 45926 733254 522317 2048 256 33947 49566 994573 526479 2048 512 16264 53407 443104 629954 4096 4 6465 6849 242083 262529 4096 8 8029 12195 395860 346908 4096 16 11324 18828 471071 615659 4096 32 17662 19637 355648 506873 4096 64 25643 39768 973098 434122 4096 128 27221 82553 490351 613089 4096 256 23069 37364 956786 749891 4096 512 30036 75834 1282002 993411 8192 4 7681 4779 354938 259709 8192 8 11830 10176 606004 357653 8192 16 21687 26381 720559 400781 8192 32 18944 20671 332792 398037 8192 64 23500 35148 635188 472624 8192 128 26113 40486 1014225 859965 8192 256 25477 39272 1336808 595223 8192 512 31299 44102 1101351 471153 16384 4 7878 6948 390607 243842 16384 8 12091 13927 527188 514992 16384 16 13488 18632 386106 707858 16384 32 21688 30947 919105 782505 16384 64 29180 34572 858394 603332 16384 128 29177 36284 858523 1045706 16384 256 36152 63604 639775 947661 16384 512 50632 44168 864452 764213 32768 4 7721 8256 299199 414601 32768 8 11761 13219 781694 550593 32768 16 11952 17445 768946 705996 32768 32 22885 28982 705963 853378 32768 64 27847 36807 921173 843381 32768 128