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: Wed Sep 2 10:25:28 2026 Auto Mode Machine = Linux oleg329-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-oleg329-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 2513 5438 621657 137320 64 8 3726 16011 457452 529661 64 16 2535 17424 780776 231050 64 32 3242 20113 1255511 300665 64 64 2244 61191 1163036 1679761 128 4 6795 3831 509943 390222 128 8 6961 19729 789741 753179 128 16 9369 31302 901083 800337 128 32 13035 46975 1391557 1065630 128 64 5742 51633 1424795 1487977 128 128 12140 51039 1436229 452366 256 4 4398 3580 620012 528727 256 8 9871 23666 864661 83573 256 16 12070 31204 941213 910872 256 32 7009 27035 1224606 94855 256 64 9049 94704 595594 1190657 256 128 11593 38507 1292410 1453348 256 256 9636 98311 1629830 2152625 512 4 5069 6140 404742 170100 512 8 9400 11538 844865 368869 512 16 15721 13235 319385 297155 512 32 14631 29464 824431 820650 512 64 22998 44959 324648 593259 512 128 29061 44514 1213400 1380303 512 256 12848 59522 722133 1252318 512 512 25376 55447 1171691 2244430 1024 4 5673 7352 604175 490415 1024 8 15587 14466 611400 331611 1024 16 11191 33220 1023145 929283 1024 32 23417 47136 781072 1050164 1024 64 12821 46370 189140 719568 1024 128 40391 40153 1062110 1319577 1024 256 33472 88943 692870 608800 1024 512 32096 116414 1175799 924283 2048 4 5248 6646 266802 161423 2048 8 7357 16446 932188 264217 2048 16 13306 24215 857980 510855 2048 32 15831 21625 304081 422176 2048 64 24999 39694 1491617 1175607 2048 128 21202 32234 371475 1306095 2048 256 21987 89624 546127 979936 2048 512 24032 71037 1137015 1523901 4096 4 5809 5640 264803 257030 4096 8 8615 14477 483710 259386 4096 16 15769 12648 144367 246554 4096 32 22775 22271 769369 737751 4096 64 23677 1386 862321 615108 4096 128 30490 29217 1049998 411732 4096 256 23647 66074 777376 461777 4096 512 28140 51806 488789 1252194 8192 4 5465 4912 210311 204758 8192 8 8733 7297 208119 207303 8192 16 15891 23739 190338 293157 8192 32 17478 27250 698982 831938 8192 64 22672 34018 835661 439322 8192 128 30981 44025 827710 1004265 8192 256 33193 57603 613076 476089 8192 512 33133 47058 718540 409557 16384 4 4903 6572 303705 230721 16384 8 10694 13429 414522 338638 16384 16 14863 18753 487618 362061 16384 32 23730 22161 412168 482093 16384 64 23607 29369 1008063 695620 16384 128 32367 45684 890427 849575 16384 256 37227 42641 1068054 851301 16384 512 36995 60556 927703 1030048 32768 4 6223 6715 328781 310311 32768 8 10538 11421 392935 631392 32768 16 14467 20460 643899 418766 32768 32