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: Sat Sep 5 04:58:28 2026 Auto Mode Machine = Linux oleg605-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-oleg605-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 2403 5828 615952 528618 64 8 4096 5212 852702 913649 64 16 3095 19565 998622 863676 64 32 3302 28433 1143223 983980 64 64 3209 36717 1204796 1828508 128 4 2944 4207 604036 501839 128 8 4740 15776 218791 640042 128 16 5958 8827 495814 77439 128 32 2784 15884 1175271 1162547 128 64 3532 15466 1332828 77573 128 128 4743 46378 1471662 1684006 256 4 4561 4710 505812 422432 256 8 5496 10054 148147 742146 256 16 9576 27465 1040643 451378 256 32 13437 43359 735537 74164 256 64 13821 53166 691930 560172 256 128 13260 75536 917880 1422540 256 256 5241 55302 1694118 2187712 512 4 4806 6136 681782 284932 512 8 7439 16158 401864 339479 512 16 14460 37293 784094 606667 512 32 14766 32118 1071167 182209 512 64 24563 46184 939486 1248678 512 128 10355 61612 939486 904658 512 256 19068 54351 1657257 1571169 512 512 12696 47002 1442420 2132967 1024 4 5855 6675 252662 345010 1024 8 7668 13215 727244 365317 1024 16 20982 22788 1144163 1000969 1024 32 19492 20850 844168 1084914 1024 64 12672 56292 1261072 215223 1024 128 20515 24213 893517 602649 1024 256 32528 72387 911146 298618 1024 512 29669 57098 205492 1524224 2048 4 3221 7299 128120 180822 2048 8 13034 10559 921686 225033 2048 16 9911 17417 185084 110720 2048 32 19563 29871 518221 487958 2048 64 16318 42144 282909 484272 2048 128 22690 52392 958291 778722 2048 256 19601 56052 463674 580016 2048 512 18780 54302 411320 1288076 4096 4 5178 7285 270933 194004 4096 8 8242 10711 308786 222100 4096 16 12959 12662 451095 352647 4096 32 16601 29600 652859 460218 4096 64 20706 30406 423485 873546 4096 128 16514 44670 339833 288917 4096 256 27893 44058 295568 273796 4096 512 48370 52968 980597 526073 8192 4 6101 7302 222282 275807 8192 8 2465 11262 432939 568965 8192 16 12108 10850 237884 383321 8192 32 17048 21370 434818 405746 8192 64 24066 24307 317250 306918 8192 128 30364 40519 762553 466275 8192 256 29402 37032 981908 922835 8192 512 25081 56072 684841 514599 16384 4 6093 6665 231844 313941 16384 8 10172 8416 427110 477056 16384 16 13251 17009 262744 342382 16384 32 15653 23146 419083 481431 16384 64 24523 30196 850806 691073 16384 128 24623 25682 655802 768624 16384 256 34767 37587 623199 819652 16384 512 25918 92909 951558 755933 32768 4 8050 8287 296938 367230 32768 8 12575 9463 611639 723036 32768 16 13014 15399 689882 429641 32768 32 16846 24908 572266 375263 32768 64 26623 34776 629717 657518 32768 128 29457 37105 459103 851601 32768 256