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 12:05:10 2026 Auto Mode Machine = Linux oleg354-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-oleg354-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 2140 5693 571375 500060 64 8 2310 30563 799377 614542 64 16 3514 47979 901377 576282 64 32 5562 9976 1232453 651849 64 64 8111 55601 1183548 1392258 128 4 3136 5596 522346 15976 128 8 3595 15238 819893 684081 128 16 3190 31620 731625 767171 128 32 3070 23752 1152564 962469 128 64 6194 85970 1266785 1172704 128 128 8683 111689 1332828 1642783 256 4 2527 4170 283473 65123 256 8 3676 6940 746272 633922 256 16 6192 23880 795478 757326 256 32 11771 55185 1098113 260439 256 64 18254 45077 591005 1048775 256 128 19323 20023 1369908 1254656 256 256 10211 139450 1398455 1790149 512 4 8952 6665 528962 268643 512 8 8020 13774 737762 714207 512 16 7145 11639 798675 588544 512 32 13113 37152 1361920 1038532 512 64 35817 63879 130985 1319250 512 128 15801 30345 966113 1329871 512 256 10857 53912 280064 597385 512 512 33620 86006 1696534 2107844 1024 4 4967 5685 613145 196729 1024 8 10278 17869 1090700 199804 1024 16 10231 56611 1137496 881958 1024 32 21564 89731 1275301 1097669 1024 64 23205 96549 1279861 1281389 1024 128 23801 59201 716567 537488 1024 256 26392 28208 189733 254158 1024 512 23359 119680 1756054 1544504 2048 4 6590 5430 233709 233018 2048 8 9901 8023 825811 610783 2048 16 8686 13879 597943 582968 2048 32 22209 42459 615377 1144896 2048 64 24228 76586 849411 379266 2048 128 35848 34747 589368 503696 2048 256 33942 54224 1512630 909873 2048 512 50344 57217 1298592 490550 4096 4 10558 11575 629949 247328 4096 8 17639 21570 494259 449219 4096 16 1652 18053 969912 529265 4096 32 18388 22959 509322 197943 4096 64 14369 27464 1048908 452056 4096 128 22775 41018 676244 409270 4096 256 37913 44182 1293781 458168 4096 512 49380 62018 1790165 956786 8192 4 7284 8032 221950 131286 8192 8 8603 12994 580824 488433 8192 16 22281 14483 257351 357449 8192 32 14166 27122 379050 304443 8192 64 13645 40914 552133 374751 8192 128 19054 28567 494293 445924 8192 256 49676 40362 1044502 557472 8192 512 22445 42275 316208 640206 16384 4 5761 6306 194279 399462 16384 8 12114 13190 391915 239822 16384 16 23258 20793 504682 418226 16384 32 19528 35721 662223 476197 16384 64 26735 58224 427434 316171 16384 128 25759 41986 1125740 624485 16384 256 49325 76588 1067224 837503 16384 512 37005 46901 442752 430002 32768 4 7321 7729 681633 164165 32768 8 13438 10321 363080 213021 32768 16