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 Aug 22 19:20:33 2026 Auto Mode Machine = Linux oleg235-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-oleg235-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 2848 8117 598110 193843 64 8 2869 11072 484710 463774 64 16 3828 28167 916769 863676 64 32 4483 32129 1421755 666414 64 64 3161 39846 1279447 1163036 128 4 4343 9433 618653 475609 128 8 6115 13104 681476 678033 128 16 2738 23773 1048974 780556 128 32 5141 20269 1057236 992724 128 64 4902 19854 1165070 1294270 128 128 7038 55291 1471662 2166499 256 4 3483 4365 115161 182212 256 8 10983 20080 474937 713067 256 16 10279 32148 847597 937106 256 32 10712 40170 1334162 1090308 256 64 6188 62620 1180188 1292410 256 128 16384 41045 224359 1254656 256 256 5509 30721 911645 2247235 512 4 3790 4766 136176 367291 512 8 7838 16971 217603 141014 512 16 8839 23812 1115688 468391 512 32 7455 17500 1139970 544106 512 64 6414 9532 727268 613776 512 128 18487 74074 1537424 1329871 512 256 12472 77929 958781 1565443 512 512 23904 65364 1729323 1827947 1024 4 6433 6035 383657 245149 1024 8 7613 16739 230011 261158 1024 16 17014 19873 190795 197571 1024 32 8266 21599 202136 191801 1024 64 21191 73086 971534 826462 1024 128 25396 39560 995171 275410 1024 256 34475 62332 2343383 342015 1024 512 43278 74946 174799 1444266 2048 4 9116 6757 717573 211899 2048 8 12167 5082 306774 251352 2048 16 11676 11073 1162246 152767 2048 32 11148 16191 691409 578688 2048 64 33176 30555 409438 257377 2048 128 21425 48042 1331606 905843 2048 256 19779 37697 565581 670365 2048 512 58221 77137 1563567 831165 4096 4 4475 6530 140596 222655 4096 8 8954 10079 335028 425646 4096 16 14243 12569 724833 984869 4096 32 12853 26353 427872 277525 4096 64 22769 36219 653356 236501 4096 128 47706 20082 401841 393620 4096 256 21867 31798 1279139 229288 4096 512 23599 44402 741348 531607 8192 4 1583 3901 239770 164125 8192 8 7383 5524 192466 153831 8192 16 11057 8003 334229 137900 8192 32 11538 22480 223665 554414 8192 64 15033 18328 281792 262555 8192 128 29912 25762 615988 775688 8192 256 27820 37353 707240 911742 8192 512 28831 28166 668076 527557 16384 4 4700 4256 114361 146322 16384 8 8489 6604 277920 210876 16384 16 9185 10065 561999 577693 16384 32 11919 17993 483957 294554 16384 64 13501 21748 535161 268497 16384 128 18595 26807 478378 289597 16384 256 17301 26496 418814 397707 16384 512 30152 29589 1133763 418075 32768 4