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: Mon Aug 17 02:27:22 2026 Auto Mode Machine = Linux oleg133-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-oleg133-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 1748 2979 532815 421534 64 8 2391 12350 674790 703068 64 16 1775 4570 842003 653436 64 32 2343 49492 1002351 561808 64 64 2353 25038 1330167 1304314 128 4 3586 6867 83380 259633 128 8 2162 6388 744820 538051 128 16 1819 7164 757430 692017 128 32 4131 21415 1048974 927549 128 64 4053 41940 630273 847059 128 128 6952 14939 1377278 1206978 256 4 3227 5825 277037 211083 256 8 3715 11366 864661 785584 256 16 7196 10277 1175022 838988 256 32 13155 44322 1180188 1024752 256 64 11291 20610 1455317 1312954 256 128 4838 21665 934659 1463250 256 256 7354 53668 1224606 1897721 512 4 3616 4416 231764 61288 512 8 2618 6756 595397 402466 512 16 8709 6946 361358 537838 512 32 12803 23572 879825 124061 512 64 15404 41396 814117 382945 512 128 8285 43588 1213400 260307 512 256 15440 44936 1827947 511451 512 512 9128 22728 1176828 262150 1024 4 4350 3296 206699 143295 1024 8 9834 8229 689533 279405 1024 16 7352 20409 425969 592588 1024 32 14244 11243 428263 986485 1024 64 13379 29648 300477 1037480 1024 128 29441 13890 342807 696126 1024 256 28717 50907 1296083 729840 1024 512 31524 38881 700326 678102 2048 4 5186 3552 125604 289918 2048 8 5524 5527 159914 245119 2048 16 9715 11054 394688 225452 2048 32 22354 19899 350626 456746 2048 64 18061 40458 610262 462924 2048 128 29119 48880 542814 444066 2048 256 23417 24767 461357 309226 2048 512 23219 28284 488319 206534 4096 4 4410 5042 291116 254061 4096 8 5109 6603 227455 317711 4096 16 13304 9411 220015 178607 4096 32 8360 1213 211218 287376 4096 64 14040 29625 266144 745272 4096 128 16447 23896 1625372 878055 4096 256 43007 60846 524787 504506 4096 512 20643 31355 375813 254694 8192 4 5071 6038 287044 323999 8192 8 7078 8119 313690 482792 8192 16 9134 12446 392656 152775 8192 32 12911 18520 406408 182848 8192 64 14382 18360 728380 265111 8192 128 26849 32821 562676 489017 8192 256 23306 43894 610115 456075 8192 512 36985 33047 312444 156860 16384 4 3971 5522 330969 334990 16384 8 7191 10327 416459 237666 16384 16 10154 9577 267458 259108 16384 32 12394 11994 462070 266372 16384 64 15727 17722 549005 448681 16384 128 18986 24327 278019 472611 16384 256 25213 26846 823196 770183 16384 512 33864 37262 919732 653166 32768 4