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 07:53:15 2026 Auto Mode Machine = Linux oleg424-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-oleg424-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 1567 12698 627470 457452 64 8 2369 11631 889431 801764 64 16 3466 11823 1033216 866463 64 32 3565 30826 392561 877797 64 64 2313 27948 929467 51693 128 4 1752 4378 319222 301985 128 8 3053 9406 805138 663782 128 16 1741 5408 1007629 948860 128 32 5113 63967 400110 1732927 128 64 8414 54467 1266785 1359835 128 128 5686 29962 847059 1852520 256 4 3547 5328 147983 195126 256 8 2099 11549 595264 413485 256 16 11750 37020 1202660 83495 256 32 6327 14069 80353 1118707 256 64 6498 62576 1455317 1117543 256 128 7623 26556 1312954 1168627 256 256 12875 49277 1202660 2148318 512 4 2794 5241 443621 276637 512 8 7359 13453 895230 52539 512 16 8015 8714 1218910 821907 512 32 13974 21953 1009722 184907 512 64 12346 20548 237927 1174254 512 128 8476 19607 1158418 583110 512 256 9384 73657 898601 1479181 512 512 13836 41863 221829 688338 1024 4 5726 5140 111001 174444 1024 8 6393 6910 233894 260225 1024 16 10923 8915 191621 342916 1024 32 11918 20228 359056 749714 1024 64 10121 21448 1157109 247579 1024 128 7616 10032 1374474 272630 1024 256 17807 32538 134101 728849 1024 512 23888 101902 637632 697030 2048 4 8064 4089 125806 135556 2048 8 4961 12821 533741 478286 2048 16 13603 15097 888876 613006 2048 32 7872 20340 179065 74603 2048 64 21173 46002 162978 680616 2048 128 21235 41968 1332432 337338 2048 256 29292 40123 1350023 761329 2048 512 62294 62795 568087 310018 4096 4 11625 7223 242120 166591 4096 8 11989 6219 140446 282988 4096 16 23699 10573 296747 315100 4096 32 10452 33607 324382 198545 4096 64 15934 17211 593436 636626 4096 128 26679 41558 371755 387258 4096 256 15844 29677 276569 332544 4096 512 22119 33051 493195 550322 8192 4 3658 3795 357650 178634 8192 8 7446 9274 521354 366121 8192 16 12885 20437 320197 321420 8192 32 39036 35368 529468 277019 8192 64 26220 27672 873719 165180 8192 128 36668 44977 484589 874921 8192 256 27899 42473 257935 1010229 8192 512 28139 32903 825542 640946 16384 4 5264 4111 360865 205300 16384 8 7737 7566 310467 252271 16384 16 7544 19638 213533 244763 16384 32 13175 12498 199943 243032 16384 64 13196 30409 301769 313174 16384 128 43820 54175 880242 748840 16384 256 27622 53583 469537 690233 16384 512 29305 35645 1175499 726338 32768 4 6362 6335 129842 141760 32768 8