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 03:16:28 2026 Auto Mode Machine = Linux oleg101-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-oleg101-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 4337 6625 633392 463774 64 8 2779 11924 735831 778512 64 16 4148 9881 939223 852702 64 32 6674 41369 1392258 1105556 64 64 3663 95808 1336792 1492919 128 4 4206 10873 574312 512376 128 8 3157 17188 362553 439767 128 16 5415 25922 1206978 969421 128 32 5472 35663 1421023 711270 128 64 6979 39774 913347 1206978 128 128 7096 69445 1377278 241963 256 4 5809 2836 593947 357103 256 8 6211 21542 755195 802614 256 16 5031 21498 1040643 1027695 256 32 17765 34575 1163562 750445 256 64 11193 54945 1306564 286651 256 128 15747 60363 1600674 1391207 256 256 27330 137328 1514860 2061693 512 4 3637 4730 294385 391390 512 8 6224 11402 821592 242302 512 16 10626 12756 767559 1391032 512 32 26216 53645 853257 80742 512 64 15192 20170 906185 949875 512 128 19128 46575 617659 1264113 512 256 19546 61420 637650 1047141 512 512 34447 55876 1736314 1999881 1024 4 7284 6693 363124 536414 1024 8 9120 7480 299492 291563 1024 16 13863 12107 858340 636781 1024 32 19270 32097 1264413 1090423 1024 64 33043 48487 916786 872995 1024 128 14554 51102 1034232 1271902 1024 256 35195 80599 1400469 1103308 1024 512 38183 80681 511439 1329791 2048 4 3567 6508 178942 147934 2048 8 12049 12378 879683 572707 2048 16 9646 12223 591194 299636 2048 32 10871 19099 1309280 204552 2048 64 16831 35574 665380 417538 2048 128 45724 47942 1127168 555594 2048 256 28085 29905 1337619 975263 2048 512 43288 73919 1663811 696115 4096 4 4763 5679 345972 340621 4096 8 8328 15777 467520 287520 4096 16 10910 17219 659703 855664 4096 32 10852 27826 727411 956094 4096 64 30121 36218 1035880 563185 4096 128 28391 39219 405665 372529 4096 256 35986 31951 814798 472496 4096 512 44913 48831 825129 975474 8192 4 4472 5830 328650 193568 8192 8 7467 9656 416512 366075 8192 16 12287 15161 398795 298835 8192 32 20297 27766 704687 988064 8192 64 19876 34181 640850 742691 8192 128 26239 28524 1283813 495405 8192 256 35025 52525 1753423 1320674 8192 512 41459 66002 1793043 712712 16384 4 5047 6804 434969 269066 16384 8 9886 9613 348446 252349 16384 16 10923 17624 530792 367419 16384 32 15894 28069 841327 718283 16384 64 22223 27551 378839 818305 16384 128 20046 39597 869725 884616 16384 256 30298 39738 505164 630593 16384 512 36509 54614 1152841 933817 32768 4 5880 5818 457060 242673 32768 8 9550 12890 605559 505764 32768 16