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 04:22:15 2026 Auto Mode Machine = Linux oleg251-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-oleg251-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 7489 6297 250919 266620 64 8 6556 31250 323491 222250 64 16 8099 30873 294723 780776 64 32 4023 63809 939223 735831 64 64 8608 86374 1066042 1421755 128 4 5773 12868 136754 254464 128 8 2721 8234 440128 444501 128 16 5514 35009 423798 370050 128 32 11102 40970 985435 395104 128 64 10122 105005 1102844 1076312 128 128 3367 47794 1067750 1705404 256 4 8075 9109 235531 113830 256 8 6514 10390 72560 107926 256 16 17911 43551 343618 309899 256 32 16420 45189 661250 170197 256 64 11100 108471 1112909 354042 256 128 22696 76104 1361224 1280084 256 256 23073 34196 660030 2065659 512 4 3635 5052 60851 254356 512 8 3702 17522 163011 90524 512 16 32957 11760 285084 265849 512 32 23967 58433 965679 578554 512 64 19961 153153 625212 1073309 512 128 35997 69480 1224470 876951 512 256 15553 59390 1580419 1610042 512 512 22540 25115 1476130 2057359 1024 4 5507 5170 29833 91396 1024 8 4030 6337 110260 185979 1024 16 11796 7825 667458 612097 1024 32 24656 33427 354317 628212 1024 64 30938 19166 585479 986712 1024 128 15041 37624 885048 1178380 1024 256 69363 88958 1105865 166886 1024 512 31412 38502 1448162 1473500 2048 4 5979 3836 124506 81118 2048 8 7908 14348 128603 120434 2048 16 16543 11666 638618 163173 2048 32 22761 23776 950339 369605 2048 64 16282 47851 1187799 558920 2048 128 43512 54648 942932 390774 2048 256 38204 50600 1562145 1346425 2048 512 19769 35701 2027934 1437211 4096 4 8248 5635 43662 94944 4096 8 11207 11959 227771 132785 4096 16 10325 11386 278736 183224 4096 32 14313 17920 289000 393430 4096 64 20137 28869 736549 671382 4096 128 29685 46614 717328 415838 4096 256 29569 27526 331147 242942 4096 512 30043 33298 1009819 700995 8192 4 6771 4262 94110 67464 8192 8 6542 6723 160257 178230 8192 16 8590 12110 330481 196516 8192 32 17927 29197 506147 321116 8192 64 19228 40321 699380 502667 8192 128 25966 30407 763400 415943 8192 256 31877 23751 307357 318828 8192 512 25920 34752 419456 1763592 16384 4 4749 4293 108884 71449 16384 8 6787 8249 165316 119394 16384 16 11805 16555 244060 223519 16384 32 21207 34247 494474 554221 16384 64 27094 32040 580701 285306 16384 128 22451 33885 830077 682236 16384 256 30264 43555 676247 722588 16384 512 37898 57435 644051 747716 32768 4