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 27 06:06:48 2026 Auto Mode Machine = Linux oleg342-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-oleg342-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 1928 7988 627470 586352 64 8 2050 15052 225234 695778 64 16 3183 37755 249057 249985 64 32 1845 46379 1124074 528618 64 64 3331 10860 1101022 1599680 128 4 3449 9179 481150 373136 128 8 2082 5920 780556 201845 128 16 1556 7362 976473 481582 128 32 2668 12277 748976 339403 128 64 2890 25256 1306873 1093856 128 128 8266 20898 1319723 1231904 256 4 3746 4009 214928 61227 256 8 2629 12462 773140 308475 256 16 10463 17589 633548 467900 256 32 8801 32044 1298662 620012 256 64 14614 88309 1552085 1280084 256 128 11182 49164 1694118 1266495 256 256 5196 58620 1169901 2030503 512 4 7979 13503 411963 384041 512 8 4006 19097 893740 524056 512 16 12917 19490 490987 969603 512 32 10912 14059 128064 355319 512 64 9773 50813 1171052 579804 512 128 11241 24380 1329871 1254513 512 256 14032 86634 1361920 1589779 512 512 12381 56724 891884 659788 1024 4 2554 4749 207408 493742 1024 8 20935 22032 215170 682195 1024 16 9952 12444 950885 842843 1024 32 15780 13945 1186518 612795 1024 64 8687 35385 1188159 500240 1024 128 28473 25659 479145 327489 1024 256 19471 79306 1414304 854752 1024 512 35132 93934 312661 420712 2048 4 2980 8289 149128 89792 2048 8 5890 13317 883937 302241 2048 16 12984 21229 275346 533343 2048 32 11814 13591 374880 570160 2048 64 16079 41550 1257160 1158327 2048 128 17365 40014 442442 1398828 2048 256 26558 15448 1767183 552912 2048 512 47223 71411 1516904 1403628 4096 4 5312 8759 159657 189875 4096 8 7996 11289 384777 224891 4096 16 10006 12820 711741 578937 4096 32 17238 24739 475504 385321 4096 64 20114 38416 994159 683672 4096 128 16343 34507 992493 779882 4096 256 39327 40894 689544 843647 4096 512 35050 44023 706443 926298 8192 4 4007 4797 198117 293062 8192 8 9349 10070 233112 352162 8192 16 14765 18387 431044 591137 8192 32 21101 21200 650471 368296 8192 64 26011 32788 910317 361693 8192 128 29534 30649 517264 369527 8192 256 31340 40555 646980 660334 8192 512 25129 42776 706499 748190 16384 4 5417 5849 167686 284197 16384 8 9017 8599 340921 417608 16384 16 10875 10613 301513 332967 16384 32 17562 21294 448555 415025 16384 64 27755 26930 401448 249566 16384 128 22848 33642 799149 591182 16384 256 33704 41916 587241 659237 16384 512 28292 39915 860814 616103 32768 4 5736 6884 285966 287534 32768 8 9814 9183 294038 300315 32768 16