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: Tue Aug 18 01:59:30 2026 Auto Mode Machine = Linux oleg214-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-oleg214-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 1171 2431 645579 512471 64 8 2593 13176 752329 712397 64 16 4052 15410 1049372 926260 64 32 4411 33937 603489 780776 64 64 3096 21665 1599680 1204796 128 4 3042 4470 633247 727658 128 8 4352 10634 748976 699227 128 16 3734 26550 1076312 1030846 128 32 4155 9475 908709 814915 128 64 10680 83341 1172704 1346196 128 128 10147 37702 747933 1911894 256 4 3819 7406 1044693 183897 256 8 5155 8265 826078 755195 256 16 3970 33024 755195 742146 256 32 11860 33702 656399 853662 256 64 4609 26942 616807 65420 256 128 7962 33241 1147398 1325925 256 256 13652 55663 1132871 2015259 512 4 5825 5680 597385 278142 512 8 8314 15357 507342 320624 512 16 13199 20999 583744 249046 512 32 25474 10469 1024169 358283 512 64 12867 25202 162432 678122 512 128 17895 27203 1492545 1179413 512 256 13568 25519 1302447 259238 512 512 15738 57541 957072 1171691 1024 4 3477 3267 408274 181691 1024 8 11941 9797 325998 228021 1024 16 18588 23419 984450 606650 1024 32 11052 25020 1090423 814550 1024 64 9118 42035 288295 533880 1024 128 8558 17634 1430318 1159609 1024 256 27698 42361 1420384 1279861 1024 512 26802 42918 1488307 517665 2048 4 3748 3362 164855 200587 2048 8 10170 11740 573664 341333 2048 16 12540 12724 383020 670836 2048 32 20078 24658 430620 509189 2048 64 24394 31594 311955 427640 2048 128 31318 59493 906225 309270 2048 256 19089 67792 552769 833828 2048 512 32968 60180 1112425 1288849 4096 4 5496 7061 361644 271383 4096 8 9589 11192 560338 511354 4096 16 22344 29749 544393 263746 4096 32 26981 21416 599797 696364 4096 64 18883 38886 469026 956999 4096 128 26159 27279 491473 856389 4096 256 18621 22174 225351 454448 4096 512 33192 72683 375058 430974 8192 4 1727 3729 252217 378066 8192 8 7812 6748 525934 561563 8192 16 14016 18891 225364 348982 8192 32 18201 24694 477133 636517 8192 64 24492 32214 392728 567078 8192 128 18869 45805 975912 555014 8192 256 31716 35558 526039 336883 8192 512 24449 43977 872876 1033039 16384 4 4542 4984 298749 217490 16384 8 10094 8339 359944 263044 16384 16 14727 12216 239728 282132 16384 32 17772 25387 766857 665745 16384 64 22037 28913 758586 540333 16384 128 21145 28480 600585 637585 16384 256 25183 27858 283872 262799 16384 512 26475 69127 1283521 993144 32768 4 4242 5341 206045 312979 32768 8