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: Fri May 8 20:40:05 2026 Auto Mode Machine = Linux oleg154-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-oleg154-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 1096 4138 587635 512471 64 8 2279 14184 117900 673098 64 16 4244 19435 913649 306151 64 32 2720 47554 821391 998622 64 64 3992 53063 592827 237804 128 4 3556 6484 592699 443033 128 8 2995 9138 357483 670413 128 16 3651 10234 366763 790905 128 32 5421 31698 389091 128628 128 64 3905 64159 1220700 1266785 128 128 10354 38811 1266785 1618028 256 4 2502 2346 349320 149800 256 8 5360 6006 128379 621448 256 16 5104 41510 883152 773697 256 32 9879 34431 1219045 299025 256 64 4811 18074 1224606 693718 256 128 10675 37214 391475 651223 256 256 6200 51949 1514860 2000242 512 4 2830 4865 60808 395353 512 8 4717 8047 192326 678122 512 16 9425 9217 1096322 600895 512 32 11400 22545 1276891 407971 512 64 17859 15648 1442420 1130370 512 128 14262 37443 714207 369376 512 256 16420 57168 478408 1105920 512 512 18082 64079 1672748 1895721 1024 4 3239 2350 161308 382938 1024 8 8660 10422 799241 189516 1024 16 16742 23248 571762 327990 1024 32 18678 21781 1262555 311256 1024 64 8607 27691 1349004 291821 1024 128 17938 30936 264928 620946 1024 256 40609 50891 1341839 1521524 1024 512 36776 41963 1765437 1475525 2048 4 4659 3904 219788 292614 2048 8 6065 9996 529758 461159 2048 16 21106 19608 217203 499856 2048 32 15056 25295 131348 890812 2048 64 21032 26492 519537 1210394 2048 128 15948 27915 1501525 534738 2048 256 18984 54398 1695335 1718053 2048 512 23005 36179 1194239 1508115 4096 4 4005 5537 276515 173905 4096 8 8145 6783 241040 226361 4096 16 9487 13039 324977 429262 4096 32 17049 16668 482501 609435 4096 64 43187 17288 899808 949646 4096 128 27779 30686 800933 1028130 4096 256 20899 26854 452544 295253 4096 512 33375 22526 727011 751006 8192 4 3561 6978 266884 268115 8192 8 9311 6494 398971 291718 8192 16 8478 15996 434796 469428 8192 32 20082 31091 634941 359156 8192 64 14215 19587 486256 368560 8192 128 20165 32113 365845 773192 8192 256 28462 55951 625008 378316 8192 512 25471 46287 544538 608893 16384 4 5502 4554 337015 173489 16384 8 11433 11145 703172 469171 16384 16 13445 12558 815411 411980 16384 32 15234 29307 965747 589078 16384 64 23784 29730 978090 854721 16384 128 29571 41151 331097 355270 16384 256 40292 62696 1397112 474733 16384 512 42094 46228 1050791 848956 32768 4 5023 4073 230405 227704 32768 8