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: Thu Jan 22 04:24:15 2026 Auto Mode Machine = Linux oleg234-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-oleg234-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 1294 11007 265565 240575 64 8 1550 12553 435202 385790 64 16 4328 27837 488236 456673 64 32 2397 33124 863676 811459 64 64 1340 30435 1188789 1033216 128 4 2198 4747 256042 254464 128 8 2379 7732 423798 367768 128 16 4209 7383 662962 518312 128 32 5942 48086 727658 359638 128 64 8046 44136 1183041 1336145 128 128 7764 54285 1504659 1911894 256 4 5500 5155 77955 160097 256 8 6232 9570 322754 364622 256 16 7852 25963 152828 272329 256 32 10764 44467 439732 400678 256 64 11349 24460 680960 491458 256 128 12097 44437 1413179 1219045 256 256 7167 69828 1479379 1479379 512 4 7289 4923 279773 106443 512 8 9236 18095 353332 443712 512 16 14322 24087 745186 425682 512 32 18522 47949 909640 489420 512 64 8699 59403 1110496 685482 512 128 9344 23613 1005938 1233614 512 256 15285 68505 1174254 1422357 512 512 12010 58554 1551867 1723770 1024 4 8817 11750 158932 84578 1024 8 13495 15944 446146 172420 1024 16 17186 27906 666733 610184 1024 32 19532 32302 345843 765208 1024 64 28653 48847 867003 593243 1024 128 22052 42386 844168 536414 1024 256 22686 57434 1582636 360563 1024 512 22028 61380 1026078 1484193 2048 4 8926 9527 142666 135981 2048 8 12819 11502 113733 165055 2048 16 18179 16569 256578 655529 2048 32 20300 28558 425880 824148 2048 64 26044 70081 1224892 369542 2048 128 17249 54440 1410543 746314 2048 256 29497 32804 259312 634655 2048 512 25916 40633 734822 560049 4096 4 5853 5562 86792 115797 4096 8 11779 15188 148550 174231 4096 16 12975 12145 164426 325002 4096 32 29813 50949 383986 192012 4096 64 30578 45518 577633 629672 4096 128 43190 49968 432113 525542 4096 256 34531 67705 651398 686788 4096 512 28980 28089 493379 1297004 8192 4 4067 1633 100438 124967 8192 8 6675 9013 137095 157332 8192 16 10853 17179 225073 182348 8192 32 21318 21664 271980 282366 8192 64 17126 28855 379926 286455 8192 128 23308 34605 417170 570865 8192 256 25964 28773 1008361 395690 8192 512 23880 24986 904994 505953 16384 4 4100 4429 67543 94352 16384 8 6667 8163 163745 121185 16384 16 11925 10727 427448 242076 16384 32 27332 26425 545168 445037 16384 64 16319 28851 568790 529406 16384 128 27996 46309 491894 279666 16384 256 19107 32764 792147 380880 16384 512 22433 28898 360055 504745 32768 4 3920 4264 79215 59895 32768 8