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: Fri Jul 3 23:25:38 2026 Auto Mode Machine = Linux oleg448-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-oleg448-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 3986 8042 390278 420873 64 8 1975 6299 176392 576282 64 16 3376 40126 942521 831569 64 32 2821 18368 1210227 771797 64 64 6295 32502 1363961 1648808 128 4 3526 5677 544601 227025 128 8 4704 11514 332467 482881 128 16 6235 11562 881842 189318 128 32 11759 31202 969421 914904 128 64 6548 87855 1121270 887675 128 128 5714 41910 1024942 1802755 256 4 4084 8747 309542 297616 256 8 14206 14904 781013 339597 256 16 13884 35063 390763 729045 256 32 11380 38422 1122215 910872 256 64 6232 22344 1420658 1023775 256 128 20956 60547 1400278 520272 256 256 6691 118243 1260547 1814348 512 4 2935 4263 166991 251349 512 8 5490 6924 861818 259520 512 16 12503 12814 246389 870552 512 32 14644 27615 501888 1005938 512 64 16678 53719 994294 748563 512 128 37547 65490 724081 755144 512 256 27624 30029 1022219 1514652 512 512 29006 42974 1753325 2169601 1024 4 3310 5456 218242 173290 1024 8 5469 4340 861957 142719 1024 16 8951 32562 386557 499019 1024 32 17418 40399 312957 242999 1024 64 13850 38987 393103 179677 1024 128 23164 52424 188237 604175 1024 256 19655 76429 1061060 682303 1024 512 39454 78963 900637 1464956 2048 4 5285 4665 284559 206281 2048 8 6094 7685 325909 401796 2048 16 15661 21084 546579 483945 2048 32 10904 16023 721612 598651 2048 64 24702 17733 318714 641384 2048 128 25633 28744 565916 365578 2048 256 27379 49900 846982 275939 2048 512 46543 52527 488430 1499166 4096 4 5241 5093 237988 286676 4096 8 6042 10652 552464 163833 4096 16 10074 13264 273814 538253 4096 32 18549 21580 473642 448480 4096 64 20476 25970 455556 649355 4096 128 22197 40951 874658 731406 4096 256 28473 46093 524723 611692 4096 512 22586 50849 519927 443056 8192 4 4246 4682 177055 125363 8192 8 10076 8395 282141 419995 8192 16 11814 20299 631035 477445 8192 32 17085 22809 645292 550091 8192 64 21768 26376 778941 277666 8192 128 22476 30083 800221 301053 8192 256 34388 40202 454230 705773 8192 512 33205 48575 1043170 754118 16384 4 4160 4896 276089 204894 16384 8 7395 9433 265573 198861 16384 16 11958 16856 590648 551393 16384 32 21710 23185 334709 483545 16384 64 21099 35739 1104924 600564 16384 128 30578 35670 1050261 854573 16384 256 27112 53599 792074 819202 16384 512 34087 54546 844667 632142 32768 4