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 Dec 29 14:05:15 2025 Auto Mode Machine = Linux oleg435-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-oleg435-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 6225 12600 254971 226183 64 8 4620 27563 338589 304761 64 16 5770 42468 863676 610350 64 32 10083 74075 866463 852702 64 64 11414 81620 1163036 1648808 128 4 9463 16987 212975 219596 128 8 10432 34982 412721 362553 128 16 11858 47777 695603 561107 128 32 12544 85723 566435 1266785 128 64 15373 73344 1152564 1015251 128 128 17586 99240 1162547 1543594 256 4 14291 18082 288345 254452 256 8 16311 34744 398153 413485 256 16 21116 49381 748353 567575 256 32 21545 72831 584570 897923 256 64 29304 78548 937924 1045710 256 128 24416 100276 897923 1262029 256 256 31407 132302 1437779 1286217 512 4 13499 18379 221760 229387 512 8 17023 27941 398730 377559 512 16 25463 52245 624303 662230 512 32 29026 72172 856319 855978 512 64 27436 86778 1510391 934173 512 128 21496 91165 1391032 996139 512 256 39412 72727 1527582 1547395 512 512 16486 133784 1467055 2073249 1024 4 12936 17642 267236 196244 1024 8 21313 33091 385551 424370 1024 16 27829 49878 718605 714065 1024 32 43918 68199 842182 752340 1024 64 48050 95450 369148 1009913 1024 128 37267 85675 1334750 1085737 1024 256 38152 118642 1454537 1888889 1024 512 45446 123136 1732676 1594978 2048 4 15450 17682 284606 276757 2048 8 24496 28917 430512 288206 2048 16 35986 51239 734257 652839 2048 32 33419 62011 1152577 754309 2048 64 46631 95299 1105695 916767 2048 128 57214 102981 1244231 1198237 2048 256 49429 113720 1045919 1403628 2048 512 75840 122094 1410543 1549185 4096 4 16712 18342 277319 265028 4096 8 24904 33528 467303 368779 4096 16 39157 54292 675473 650166 4096 32 50584 76097 735099 694590 4096 64 62713 96786 1220178 919210 4096 128 63856 109322 1270061 1228554 4096 256 69539 95500 1301524 1223828 4096 512 62220 85749 1698823 675792 8192 4 15820 15891 267197 233503 8192 8 25266 28683 482162 432432 8192 16 42232 48386 669274 629716 8192 32 44831 61832 907503 801883 8192 64 68383 91192 1213661 1202238 8192 128 76121 102463 1105354 1113341 8192 256 78707 72338 1263234 898251 8192 512 60030 88513 1124969 1023256 16384 4 14254 16489 208804 249577 16384 8 25266 28893 473047 406155 16384 16 40034 45001 775354 634055 16384 32 49637 71629 656592 679410 16384 64