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: Sat Sep 5 00:00:01 2026 Auto Mode Machine = Linux oleg619-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-oleg619-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 1639 6304 571375 496362 64 8 2707 11706 1210227 581273 64 16 4574 12643 1033216 718114 64 32 5180 35219 1204796 913649 64 64 4395 41554 1421755 1526887 128 4 2706 5243 65108 531131 128 8 3859 9545 895074 587511 128 16 5176 30124 1175271 448961 128 32 6441 60148 1074159 1032829 128 64 6774 40113 1243315 1306873 128 128 7777 43098 1436229 1858934 256 4 3068 3675 273230 114951 256 8 5424 18029 178783 757326 256 16 8218 21608 941213 230624 256 32 8423 63792 339061 359977 256 64 8451 42167 1579483 1049800 256 128 11592 33741 969251 980760 256 256 9020 66252 1622442 612235 512 4 4087 4767 183313 156330 512 8 7128 16821 305135 382672 512 16 16399 18777 977103 662434 512 32 15213 17136 490426 220984 512 64 16023 34459 1091863 994294 512 128 12310 55754 489979 1296159 512 256 24667 34222 435700 850554 512 512 19169 28005 1026126 1042566 1024 4 4815 6073 369402 235834 1024 8 8017 12866 382529 718605 1024 16 16299 26812 643266 394475 1024 32 26254 30629 486031 373579 1024 64 26948 36371 694326 1149368 1024 128 30421 84718 679496 285307 1024 256 28153 81652 1244266 1014925 1024 512 20396 51779 467158 966071 2048 4 8322 8434 380038 346818 2048 8 11021 12584 383225 409692 2048 16 17028 17691 580840 355620 2048 32 29187 25316 451204 490298 2048 64 15953 38252 311107 681534 2048 128 28684 71932 1318727 323333 2048 256 28996 75128 1330781 1407538 2048 512 32885 59659 1325646 859353 4096 4 8979 6246 340932 272576 4096 8 7944 11493 478390 405828 4096 16 21273 35832 611714 415757 4096 32 29992 49169 1020739 725323 4096 64 25917 47456 850117 549565 4096 128 27829 40644 1079625 773247 4096 256 50646 40343 364994 412028 4096 512 38176 86072 1238920 350711 8192 4 9697 12615 459448 338820 8192 8 17642 25986 533852 418384 8192 16 30373 28867 622540 650779 8192 32 30604 46995 1182298 504460 8192 64 36542 38558 497990 580206 8192 128 30785 69333 311506 713897 8192 256 2695 47081 1176187 1001834 8192 512 38658 49200 368992 408967 16384 4 7212 8414 295388 338770 16384 8 15378 14479 469376 388467 16384 16 20266 22756 633956 541854 16384 32 22023 39052 548637 509566 16384 64 33238 43488 991168 505603 16384 128 37115 42774 675742 679920 16384 256 34587 54403 545064 560175 16384 512 34149 38248 873806 814281 32768 4 6578 5701 323340 243189 32768 8 11247 10884 486064 436098 32768 16 11101 15943 433840 325024 32768 32 19700 24882 516088 435849 32768 64 21753 30135 416954 552812 32768 128 27998 41402 780340 568484 32768 256 37264 42498 599542 522190 32768 512 29909 42903 620243 324483 65536 4