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 Apr 9 15:44:36 2026 Auto Mode Machine = Linux oleg650-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-oleg650-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 1620 8023 653436 477808 64 8 2192 6111 752329 581273 64 16 1807 8389 688639 771797 64 32 4549 19993 1105556 1017549 64 64 2597 60488 460591 1638743 128 4 2596 2079 202837 305421 128 8 4570 5285 307696 455822 128 16 3088 19738 1067750 790905 128 32 4134 20901 1254941 1007629 128 64 3284 30717 366763 1391557 128 128 7610 29205 1579934 1975201 256 4 3531 5943 577962 579209 256 8 3358 10593 787312 639967 256 16 6781 14936 996229 641497 256 32 11197 18116 106980 1071806 256 64 8567 16039 1213534 1312954 256 128 4726 28754 1391207 583299 256 256 7568 48511 1445521 1842366 512 4 4769 4014 101791 41474 512 8 5529 6191 384109 722133 512 16 6298 18795 912733 565751 512 32 12704 16232 240592 181240 512 64 13158 37669 1130370 944444 512 128 17068 35818 873740 474497 512 256 15291 54771 875164 173789 512 512 24439 46419 1506154 131684 1024 4 6248 2906 122707 66385 1024 8 5768 8169 585799 340659 1024 16 15666 15593 248295 793189 1024 32 19387 11077 430408 172220 1024 64 18480 35760 309841 809484 1024 128 23948 48650 364790 1130312 1024 256 25256 47385 1537317 1304348 1024 512 25070 53388 1546729 490696 2048 4 3792 5109 349485 229182 2048 8 8279 11655 242881 259038 2048 16 10984 16368 430253 263949 2048 32 17153 12111 1120405 397980 2048 64 16987 25059 519663 699175 2048 128 15464 37999 503312 400466 2048 256 29312 43917 849747 872978 2048 512 41317 43418 735892 806960 4096 4 3940 4342 117569 178661 4096 8 5430 5727 498056 236325 4096 16 7746 11146 530426 416382 4096 32 12240 16747 388142 299307 4096 64 26106 23078 498172 260459 4096 128 23171 20321 627167 754204 4096 256 22609 58998 1546230 335709 4096 512 20419 65320 638115 698147 8192 4 3648 4513 328890 147094 8192 8 8441 6788 171866 174249 8192 16 12814 11949 293904 275435 8192 32 12344 21262 486841 421029 8192 64 12569 19803 204238 281250 8192 128 16473 25233 459012 809821 8192 256 22927 32943 724968 411534 8192 512 25960 37415 523450 351751 16384 4 3683 5466 190871 187384 16384 8 5706 7039 232453 175194 16384 16 11886 10975 365731 451410 16384 32 13919 21586 761166 510216 16384 64 18986 21088 590161 413144 16384 128 17176 23997 561847 420694 16384 256 24933 31689 549501 261934 16384 512 27082 25448 495780 551813 32768 4