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 Aug 22 02:51:23 2026 Auto Mode Machine = Linux oleg431-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-oleg431-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 4522 2587 581273 471099 64 8 4051 3514 387461 532815 64 16 1677 12257 866463 688639 64 32 2425 28035 1210227 955947 64 64 5292 41554 1124074 207798 128 4 3345 2592 584313 505620 128 8 3808 5053 490380 119522 128 16 7603 27426 753179 864797 128 32 8974 74206 731625 313811 128 64 13500 44691 1048974 400110 128 128 9895 58204 1040839 1663139 256 4 3321 7341 658008 349661 256 8 6708 4469 496917 390195 256 16 5299 8623 403085 762164 256 32 14851 37000 598249 927393 256 64 14263 24958 359495 375328 256 128 8529 34056 69983 1280084 256 256 9331 70193 1497953 894929 512 4 3966 9538 449094 208133 512 8 10560 9338 709019 259520 512 16 10896 16023 1082507 917412 512 32 16210 46715 532767 441341 512 64 12700 44333 215940 958781 512 128 17243 47926 1279935 1196499 512 256 33201 75988 701378 615359 512 512 23293 46968 1150968 1753325 1024 4 8743 7598 543473 244799 1024 8 4979 8787 817963 169114 1024 16 11481 15366 491369 780504 1024 32 7081 13042 1084640 428092 1024 64 15583 27030 666216 224177 1024 128 27860 41011 338058 1236742 1024 256 26053 84626 1088213 510224 1024 512 21691 89205 289266 786507 2048 4 6942 6077 205890 198469 2048 8 8284 19659 252253 386276 2048 16 20092 21093 149066 803112 2048 32 24499 25961 348761 545087 2048 64 23246 30138 288613 167963 2048 128 22645 30389 697982 617634 2048 256 32405 39235 864891 571602 2048 512 34365 43455 698039 590543 4096 4 7626 5416 235509 142633 4096 8 8023 9118 322391 170121 4096 16 15250 15046 697070 350840 4096 32 16062 19099 420664 321378 4096 64 14206 37800 877293 493025 4096 128 25185 38687 289122 380137 4096 256 28465 42519 1033014 682341 4096 512 41916 29968 413148 324357 8192 4 5433 5609 144002 140872 8192 8 5982 9476 315270 296424 8192 16 13199 11010 364637 378979 8192 32 12756 19738 389593 943254 8192 64 23286 24122 673960 510183 8192 128 20278 33267 430116 546643 8192 256 24863 35266 620281 578818 8192 512 25269 81916 502674 1305718 16384 4 4867 5258 172674 260887 16384 8 8753 10095 610227 304717 16384 16 11958 19242 491317 231346 16384 32 19517 28513 659471 584807 16384 64 22918 33390 866742 970274 16384 128 33219 48714 598461 662191 16384 256 35481 57628 1261467 612741 16384 512 52581 50236 496948 491008 32768 4 5147 4985 278083 327443 32768 8