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 Jun 26 10:54:43 2026 Auto Mode Machine = Linux oleg201-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-oleg201-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 1923 10374 546928 488236 64 8 3118 9025 270108 666414 64 16 3762 18528 587635 306501 64 32 3332 14922 503814 603489 64 64 1257 2389 831569 1638743 128 4 691 1036 592046 573699 128 8 5374 2246 718889 703810 128 16 8044 32965 1024942 761728 128 32 5064 54028 1022989 853794 128 64 1399 19799 1114289 1278855 128 128 1544 34510 1359835 1885042 256 4 964 1126 509895 973645 256 8 4196 11418 261263 326483 256 16 4464 8726 1008392 867455 256 32 2958 7059 1089202 1093639 256 64 4478 11112 1103757 1280084 256 128 2165 14269 1066483 1579483 256 256 5118 35383 1147398 1911233 512 4 1424 1988 572844 459668 512 8 9070 8566 733478 639930 512 16 6948 6799 603767 406658 512 32 5039 11256 1086890 894857 512 64 6989 8135 168366 1153441 512 128 15142 48610 804962 334404 512 256 13425 28420 712076 1407442 512 512 8662 31378 255628 101144 1024 4 4198 5644 262772 142100 1024 8 6693 6951 344539 479198 1024 16 8226 10139 1070048 98007 1024 32 13720 16056 930088 649296 1024 64 21562 26384 986485 554131 1024 128 39462 66060 625103 735086 1024 256 23669 30347 367160 444991 1024 512 13334 17386 520614 378151 2048 4 4864 16708 457354 539236 2048 8 19608 13702 870412 393315 2048 16 16038 22438 611000 267784 2048 32 20460 8291 1454489 259900 2048 64 12556 29868 1261777 193716 2048 128 14231 36396 1309480 630555 2048 256 12520 30459 1318727 146503 2048 512 16064 12048 370003 373722 4096 4 663 1553 554568 483928 4096 8 4001 14616 347237 590194 4096 16 10523 15263 277507 170525 4096 32 5904 45757 378696 491839 4096 64 11309 21956 250337 655574 4096 128 11271 14346 479793 279212 4096 256 6228 17886 245269 293578 4096 512 25768 15758 583816 274435 8192 4 2097 1287 281395 729803 8192 8 9992 11879 184259 286374 8192 16 12248 14201 490805 395786 8192 32 18539 32021 489128 1062919 8192 64 7860 13838 466224 262370 8192 128 14161 21490 240234 327716 8192 256 22816 30953 606807 249756 8192 512 13945 40932 954787 574195 16384 4 5035 3909 426699 328567 16384 8 7799 7575 452310 224749 16384 16 12037 10287 404263 224802 16384 32 23712 18039 291296 465772 16384 64 19104 25585 722489 323737 16384 128