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 Aug 26 19:50:31 2026 Auto Mode Machine = Linux oleg154-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-oleg154-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 2289 2806 659861 410573 64 8 2790 14655 901377 877797 64 16 3246 21249 831569 297664 64 32 2227 17763 1336792 1232453 64 64 2886 42549 1163036 1518251 128 4 2741 6922 633995 549056 128 8 7742 20112 556454 848397 128 16 3457 21936 711270 780556 128 32 8926 53156 955616 992724 128 64 3832 80048 1209698 743788 128 128 4350 8918 1421023 1471662 256 4 3050 9748 566377 583299 256 8 7620 24279 413644 423766 256 16 10412 33894 1089202 927393 256 32 6235 24515 357579 121274 256 64 5170 5567 1224606 1080434 256 128 4636 64629 378237 484801 256 256 18053 54408 2097948 2783115 512 4 6701 9049 127079 227951 512 8 9857 14833 436852 688338 512 16 19950 23422 969603 944444 512 32 16036 52904 1025636 1251589 512 64 41344 46055 734482 666546 512 128 13860 17663 438011 564561 512 256 9362 19465 1098566 102889 512 512 5631 33773 107064 307142 1024 4 3814 4513 419151 207618 1024 8 6552 6233 338058 109975 1024 16 10459 9972 507931 812086 1024 32 13359 13804 500706 899883 1024 64 21861 23291 425758 678209 1024 128 21878 23879 123238 141106 1024 256 13619 44733 1602715 1279861 1024 512 32342 80188 157084 361322 2048 4 10453 7921 204047 113094 2048 8 7629 6938 306085 432986 2048 16 15640 35183 374210 691186 2048 32 6825 14801 871472 351343 2048 64 18983 18930 699175 1088738 2048 128 34430 45595 644415 566999 2048 256 15699 24472 599361 105813 2048 512 15896 17953 795304 370946 4096 4 3123 3444 281550 240743 4096 8 7140 5732 359262 175937 4096 16 10867 17320 210881 152097 4096 32 15799 13202 509081 796699 4096 64 17721 27058 295527 926298 4096 128 16880 56683 363058 352980 4096 256 28198 31680 431429 386014 4096 512 27771 52174 601561 460021 8192 4 5332 5975 279218 335889 8192 8 8904 6880 245665 219606 8192 16 9563 10755 1385875 348596 8192 32 17738 38721 770936 632487 8192 64 17727 24291 628990 503315 8192 128 18778 31303 970619 740163 8192 256 26292 17747 324461 361214 8192 512 18714 30028 877939 725918 16384 4 4117 4111 219583 155201 16384 8 6126 7990 180984 224525 16384 16 18167 11995 561384 402813 16384 32 22216 11436 467057 285724 16384 64 25073 24540 823482 287463 16384 128 15913 15053 633442 341997 16384 256 19774 52945 1181684 838432 16384 512 33576 48942 858791 598284 32768 4