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 Apr 23 00:51:06 2026 Auto Mode Machine = Linux oleg428-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-oleg428-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 4734 13039 418903 450541 64 8 4999 18917 703068 538156 64 16 4662 19584 913649 598110 64 32 6729 42923 1066042 524487 64 64 6656 63492 2278628 1392258 128 4 6866 11204 484625 453896 128 8 7354 31264 653282 447464 128 16 6215 40430 731625 847059 128 32 7585 46889 612303 962469 128 64 9391 69943 718889 1229084 128 128 7844 61653 1196221 1421023 256 4 9217 11883 344943 691930 256 8 10876 21887 707430 575175 256 16 11970 27792 984356 378637 256 32 9545 49220 876662 977189 256 64 19399 84521 1241598 1148625 256 128 19629 87077 1185399 1405778 256 256 17478 56314 1398455 1694118 512 4 10290 15168 464239 643189 512 8 12942 18920 888930 806171 512 16 15634 45113 713258 759416 512 32 18319 52239 1218910 980673 512 64 31100 86676 635951 930933 512 128 29357 88860 1741948 735488 512 256 30475 109706 1255246 1357615 512 512 28367 100609 1882427 1672748 1024 4 12486 14123 635650 703308 1024 8 17079 22872 1015885 846164 1024 16 31888 47736 986485 872286 1024 32 32683 65679 1924436 916786 1024 64 36876 77458 1098792 1424152 1024 128 51161 106835 1454537 1000037 1024 256 39776 71378 1732676 1283303 1024 512 39178 159203 1587315 988301 2048 4 14573 17062 589530 253623 2048 8 21540 27410 946882 634280 2048 16 32090 48164 1092894 1101159 2048 32 41102 72201 1219675 1263447 2048 64 56726 87274 1568134 952975 2048 128 65235 128885 2078978 1120990 2048 256 65721 119007 1613798 1453505 2048 512 59187 146957 1906837 942002 4096 4 15243 14181 655149 464197 4096 8 24373 27297 955881 820832 4096 16 36064 44758 875594 1223741 4096 32 47290 59684 1286033 1069743 4096 64 62918 87665 1442255 1027331 4096 128 59749 99265 1398464 983685 4096 256 62502 91306 1127746 1355862 4096 512 68247 137274 1611951 1432156 8192 4 14984 14842 513799 452418 8192 8 22671 24383 657517 585476 8192 16 30822 42315 1075327 566638 8192 32 38402 47732