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: Wed Sep 9 04:07:16 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 1623 2943 598110 113898 64 8 927 7660 818885 712397 64 16 2820 9979 126453 939223 64 32 857 12079 1101022 901377 64 64 2755 65571 1210227 1013707 128 4 1569 3586 300464 339618 128 8 4678 9018 826202 684954 128 16 2908 21588 1175271 821147 128 32 5911 15599 1196221 1093856 128 64 10922 42626 1093856 814915 128 128 4998 40278 1663139 971174 256 4 4242 2554 653204 411583 256 8 4075 5340 703260 787890 256 16 10926 12349 1639786 952062 256 32 6463 43432 1267990 1031644 256 64 9041 44160 839644 790209 256 128 19817 59812 609455 847597 256 256 17513 75899 1683493 1911233 512 4 5751 13954 552932 288453 512 8 8223 15155 503536 241621 512 16 19270 25912 596721 960496 512 32 19002 28371 982467 684390 512 64 6527 16513 1306409 591951 512 128 7945 22998 1410215 1446306 512 256 27163 46554 1556366 760762 512 512 27111 58148 1589779 919375 1024 4 5061 3975 166563 257726 1024 8 6268 7641 820463 112764 1024 16 9392 14544 596042 500999 1024 32 9101 21561 567006 1015645 1024 64 21395 34052 1076755 1115342 1024 128 20398 53744 1424152 1068983 1024 256 28447 60299 1380217 747496 1024 512 13746 22993 332252 940269 2048 4 3176 5601 251323 129595 2048 8 11520 21426 329219 134729 2048 16 11150 17172 1147343 602176 2048 32 16486 39221 1362658 609699 2048 64 38602 27852 554410 536978 2048 128 14041 29454 1588726 1238134 2048 256 33814 55293 1099327 256800 2048 512 79943 86254 416425 1532875 4096 4 8276 6478 174773 397711 4096 8 12768 9495 503619 476837 4096 16 17189 20731 574485 508689 4096 32 27414 20142 1320025 636413 4096 64 37350 45646 389912 495156 4096 128 19190 36459 435785 779740 4096 256 22637 27313 664603 1418322 4096 512 25873 47812 833213 748943 8192 4 1445 4075 81441 109296 8192 8 6124 5775 211160 357650 8192 16 8733 8212 240446 326843 8192 32 13325 23580 709988 136367 8192 64 31704 41517 792268 557735 8192 128 29768 19780 393772 358493 8192 256 18194 22753 689445 503381 8192 512 21675 21191 458963 424698 16384 4 3769 4910 132190 118243 16384 8 6584 14702 207845 217035 16384 16 13903 11157 384266 312385 16384 32 25409 55052 730026 543074 16384 64 42930 34941 770390 729763 16384 128 55963 76455 1040387 965014 16384 256 20465 29596 382474 532553 16384 512 17595 27033 368635 841245 32768 4 5046 6605 344432 319354 32768 8 12748 12317 261842 551538 32768 16