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 12:37:55 2026 Auto Mode Machine = Linux oleg453-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-oleg453-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 1048 5838 520419 621657 64 8 1823 5681 735831 264519 64 16 1271 10004 939223 831569 64 32 2768 29642 1066042 1087638 64 64 1446 35835 1087638 1421755 128 4 4098 11761 617941 288205 128 8 4387 17579 278777 477725 128 16 6628 27274 1024942 653282 128 32 6171 34934 1155043 253983 128 64 3163 15541 1133103 1175271 128 128 8986 55320 1436229 1346196 256 4 5298 4235 540164 201876 256 8 5292 13138 405062 348752 256 16 12863 22497 78819 545931 256 32 4680 15025 496917 124264 256 64 13547 40176 999940 937924 256 128 9591 28002 1128110 1306564 256 256 9051 55100 868157 1175022 512 4 2569 9455 259113 280981 512 8 7094 17234 503418 568899 512 16 11550 25028 528311 696600 512 32 11061 23883 848872 189978 512 64 11233 51354 885631 1049187 512 128 17367 65498 1140576 799865 512 256 20025 64016 1376763 1398278 512 512 13229 39131 1075459 1249404 1024 4 5628 4993 357532 344899 1024 8 7876 8308 907872 848337 1024 16 8280 17729 993100 171552 1024 32 15944 31185 1129123 544369 1024 64 13985 37209 823136 852716 1024 128 32912 69381 1203137 775712 1024 256 26208 66021 658151 946485 1024 512 22145 68858 507691 1147832 2048 4 7719 5825 247165 183022 2048 8 6056 15600 402512 223848 2048 16 13330 22003 1132220 434168 2048 32 9565 36547 653684 703815 2048 64 27385 56338 553232 588158 2048 128 38765 68469 1549185 659961 2048 256 24299 83076 624231 1438174 2048 512 17654 34917 1065510 1566989 4096 4 10783 7572 242739 204471 4096 8 11962 9179 449231 512651 4096 16 16737 12348 723947 248984 4096 32 15050 42933 191733 334858 4096 64 32459 29137 783045 550252 4096 128 29963 41729 681637 488830 4096 256 27049 49745 792253 554031 4096 512 41652 34949 318211 812870 8192 4 6590 5605 158685 161349 8192 8 2217 9382 519430 315754 8192 16 18578 14821 494329 250603 8192 32 21667 29671 1283621 515093 8192 64 16147 25183 630155 604044 8192 128 24339 28268 473987 411825 8192 256 27950 43442 680919 703173 8192 512 23883 35119 590974 620740 16384 4 6984 7592 164610 192725 16384 8 9224 10101 440109 244223 16384 16 14311 16195 718591 643972 16384 32 16864 22150 440230 619340 16384 64 24938 29968 585520 389827 16384 128 23479 25347 548527 816060 16384 256 24265 37762 315253 206607 16384 512 23692 38002 1088283 413674 32768 4 5733 8298 330672 207353 32768 8 13105 12947 603941 536257 32768 16 18320 19045 793665 540734 32768 32 25133 33255 657754 503904 32768 64 42685 47523 1198709 611092 32768 128 31339 41288 1141104 975638 32768 256 35735 43621 1041813 950484 32768 512