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: Wed Feb 18 02:33:44 2026 Auto Mode Machine = Linux oleg158-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-oleg158-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 1959 2717 15960 130892 64 8 1497 5023 207798 179699 64 16 5704 16481 253766 320021 64 32 3413 31221 365812 512471 64 64 3357 14218 423529 799377 128 4 2858 3549 18675 117972 128 8 5250 6415 82155 136302 128 16 2388 30828 122021 201618 128 32 21727 52114 574312 528517 128 64 20040 121882 170934 826202 128 128 14209 131850 1085013 1105114 256 4 3749 6258 47110 100436 256 8 3341 6493 233991 91790 256 16 3584 13184 218071 104624 256 32 6468 44840 651223 270340 256 64 19214 48284 825443 659625 256 128 18340 86544 1053922 354978 256 256 10634 78941 1224606 782721 512 4 8388 9388 17189 41274 512 8 6458 11593 137713 55834 512 16 6682 8386 147757 149184 512 32 5177 11030 585176 527273 512 64 27943 62715 478515 130818 512 128 26383 80073 302215 437921 512 256 13876 36972 1110496 513530 512 512 27448 55566 137150 665720 1024 4 12908 7162 125503 117029 1024 8 4784 8563 71319 84266 1024 16 5558 10104 62488 162930 1024 32 9783 14827 583174 324545 1024 64 16150 17619 168616 682628 1024 128 28113 41732 210663 312957 1024 256 9417 36814 290911 385412 1024 512 16246 18976 1253344 278481 2048 4 4445 3470 46680 45361 2048 8 6580 9776 73153 32862 2048 16 12259 17522 180822 72711 2048 32 17884 13093 196927 93035 2048 64 23488 35111 373316 357232 2048 128 37232 72835 1314489 467153 2048 256 46990 72039 683813 950760 2048 512 24863 41072 1431225 177654 4096 4 6595 4588 50095 36024 4096 8 6053 5241 53129 38966 4096 16 9624 10567 219908 227013 4096 32 20078 15694 210007 255824 4096 64 18971 18947 285096 253417 4096 128 16782 25905 326894 271259 4096 256 23164 22724 681529 136999 4096 512 18711 41921 783009 592086 8192 4 3836 3955 24771 39417 8192 8 4827 6358 102012 125484 8192 16 12155 12418 86590 107174 8192 32 12523 29954 362942 257641 8192 64 18592 22985 296973 376228 8192 128 24029 30683 253992 346103 8192 256 25312 26614 384063 516029 8192 512 29242 34826 270596 432383 16384 4 4333 4609 58993 48217 16384 8 7587 7516 110186 115213 16384 16 13017 15777 319524 264560 16384 32 17224 19921 198550 153158 16384 64 20725 30262 370082 357566 16384 128 24284 36572 476085 246002 16384 256 22794 54354 659611 370813 16384 512 27848 40447 850932 474762 32768 4