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 Aug 22 06:11:34 2026 Auto Mode Machine = Linux oleg452-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-oleg452-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 3021 7583 213415 538156 64 8 3631 13018 769584 818885 64 16 5324 25078 1163036 929467 64 32 4082 16776 1304314 1255511 64 64 2610 52802 1029254 1204796 128 4 3913 3811 116995 483316 128 8 6402 12086 421139 549056 128 16 6312 23875 1217930 1022989 128 32 6898 35844 1152564 947186 128 64 6074 61239 1471662 1391557 128 128 9294 60981 1487977 1755594 256 4 3599 7746 588414 356038 256 8 3121 9034 163162 773697 256 16 11544 31142 1076103 889002 256 32 12382 42489 1126926 1019886 256 64 14982 75003 1405778 1286217 256 128 17569 54898 410168 1453348 256 256 10409 51822 1591186 823544 512 4 3600 4680 616772 540681 512 8 7619 6297 549818 581059 512 16 14367 12212 1030064 899731 512 32 17084 39631 1394645 978885 512 64 17649 23910 1380303 1008300 512 128 20757 45935 700463 1135750 512 256 19201 78418 962218 1700565 512 512 24429 71111 1574625 942786 1024 4 4748 6980 644038 284608 1024 8 8533 9932 189098 468177 1024 16 6077 13077 957030 956817 1024 32 8082 14766 616136 563584 1024 64 16893 39399 643266 1113030 1024 128 22689 53120 1002137 772781 1024 256 19322 28472 400619 809484 1024 512 27044 69101 941918 1756054 2048 4 7141 5165 243431 159032 2048 8 9809 5902 403400 288739 2048 16 14788 24880 238028 472550 2048 32 20345 35626 727540 571108 2048 64 23411 21879 657033 602683 2048 128 22845 19438 487377 1201926 2048 256 24648 26086 334905 472212 2048 512 29196 67443 1556202 318254 4096 4 4455 6312 401888 176157 4096 8 7255 10688 566528 341420 4096 16 23634 28809 675686 438308 4096 32 14952 25088 799703 479686 4096 64 23620 22322 374510 281513 4096 128 20833 33986 492544 368842 4096 256 31137 46963 1605624 415959 4096 512 27548 50183 520463 324848 8192 4 3990 2067 472950 481709 8192 8 9700 16072 257440 334626 8192 16 15545 19670 498778 215181 8192 32 28670 22457 590710 689099 8192 64 18812 26762 410300 292267 8192 128 22698 38792 938257 457521 8192 256 23059 37002 605108 758513 8192 512 33658 46057 706208 790282 16384 4 6545 8212 223057 260680 16384 8 11573 14226 340185 472283 16384 16 15927 17441 620935 643592 16384 32 23873 33218 832349 648769 16384 64 25942 28254 375892 360897 16384 128 28627 38889 960093 867518 16384 256 28084 47351 973325 754605 16384 512 36506 42656 551875 430465 32768 4 5172 6651 435796 510605 32768 8 7723 7457 282555 316760 32768 16 11221 15521 273009 353908 32768 32 21581 20211 391321 363939 32768 64