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 Aug 6 07:26:00 2026 Auto Mode Machine = Linux oleg253-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-oleg253-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 1033 4330 608965 640954 64 8 2040 24023 799377 703068 64 16 4568 25560 743988 998622 64 32 1649 54100 1049372 801764 64 64 1662 30816 1204796 1690338 128 4 3202 1845 637004 589446 128 8 3874 5748 766076 735635 128 16 6784 46191 998261 358677 128 32 4586 28763 1306873 859260 128 64 3212 58104 1111981 334956 128 128 3898 39851 1067750 1911894 256 4 2581 5291 624339 428843 256 8 3612 4331 771473 653204 256 16 5704 20578 693718 1048775 256 32 4909 38912 1306564 1098113 256 64 5590 44661 1306564 1260547 256 128 9494 91267 1163562 1610276 256 256 11894 47258 1552085 2223962 512 4 5980 3811 157928 305135 512 8 3564 6020 147251 259364 512 16 14160 16796 1230786 930933 512 32 8724 23845 2032051 1565443 512 64 15009 25008 1531941 600223 512 128 9509 24194 705294 1312798 512 256 7319 26955 451549 59218 512 512 12496 28820 1635797 1821745 1024 4 2946 2067 268909 169114 1024 8 6920 8945 208041 482536 1024 16 9823 14386 955327 833196 1024 32 10207 22023 448757 544714 1024 64 8864 11413 1232130 903860 1024 128 9005 31833 1038734 327889 1024 256 11672 22634 292576 93883 1024 512 31817 62884 439841 253647 2048 4 6549 4038 697755 119899 2048 8 15660 19704 505682 358798 2048 16 10367 22897 639188 719617 2048 32 12346 18639 1352786 1117345 2048 64 17926 36815 640810 1301149 2048 128 18688 15766 436773 266347 2048 256 16600 33628 690964 701402 2048 512 11861 35766 1638423 1643438 4096 4 3453 5354 164894 206785 4096 8 8177 8259 407968 291699 4096 16 1142 16934 707403 437137 4096 32 13932 26965 1052636 183661 4096 64 18348 16443 389833 202822 4096 128 23284 25304 743369 620037 4096 256 38400 51688 268784 347652 4096 512 34751 37957 636343 471627 8192 4 3846 3861 171624 317508 8192 8 6975 7611 350217 389536 8192 16 16083 19569 182426 308339 8192 32 14060 18524 637462 544348 8192 64 27140 22009 503352 550136 8192 128 23465 24178 404280 449588 8192 256 15981 18203 425334 362655 8192 512 17267 30122 289274 235017 16384 4 4048 5532 225834 305119 16384 8 8356 6909 261712 199895 16384 16 11392 14500 359045 353682 16384 32 11815 17312 697010 597063 16384 64 16790 27288 864550 537148 16384 128 18200 22836 467419 238462 16384 256 24552 24331 553124 720996 16384 512 23423 43116 825550 799725 32768 4