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: Sun Nov 16 19:27:39 2025 Auto Mode Machine = Linux oleg227-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-oleg227-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 2207 7178 217743 172537 64 8 2344 27574 312204 407457 64 16 3758 45646 627470 275939 64 32 3571 54002 929467 939223 64 64 5192 59535 1049372 1638743 128 4 4341 15479 25281 280086 128 8 7342 29719 462100 535903 128 16 3446 28711 508012 540217 128 32 4021 56993 841746 399812 128 64 6047 72074 1057236 976473 128 128 3704 23104 1266785 1504659 256 4 7567 9718 27871 160504 256 8 2578 6275 392047 350689 256 16 7771 22358 646518 537729 256 32 8886 60691 740100 721210 256 64 5148 43280 980760 844929 256 128 9387 77859 1132871 1138879 256 256 10084 107333 1495866 1855098 512 4 4469 6468 244398 75181 512 8 11003 20997 282719 501888 512 16 7525 13082 269757 546460 512 32 19489 60708 839252 805264 512 64 24518 68393 707152 1047141 512 128 18925 87165 1528669 738777 512 256 24287 122399 1705969 1372364 512 512 21095 105544 1471074 2097550 1024 4 9571 5321 275127 247095 1024 8 14797 21486 204719 425969 1024 16 25812 45319 714659 629778 1024 32 30428 35203 659870 818587 1024 64 39448 94186 1171629 820620 1024 128 32371 106668 1468964 1363565 1024 256 21858 44764 563880 1560781 1024 512 36368 118462 1720874 1244266 2048 4 14174 7497 258750 161474 2048 8 15141 12410 241223 448822 2048 16 22699 52870 799078 419577 2048 32 47632 36146 950339 494333 2048 64 47704 71608 1216221 855076 2048 128 34323 39709 544397 753515 2048 256 17832 64834 1380173 705723 2048 512 55474 74695 1610168 1482094 4096 4 7159 10794 329104 234164 4096 8 12817 11663 204401 257350 4096 16 15173 30888 426449 483997 4096 32 32265 46293 744077 301730 4096 64 42480 68977 447254 736833 4096 128 53891 86426 1178656 591210 4096 256 58935 109340 1512604 1360263 4096 512 24539 57634 1744537 851550 8192 4 9484 9267 273304 227245 8192 8 14018 14461 462827 240368 8192 16 18449 18162 258748 217964 8192 32 22709 50723 742306 724509 8192 64 42516 89220 513768 392150 8192 128 3010 64093 1298465 1253144 8192 256 33910 43232 325232 449318 8192 512 18680 48220 651038 732682 16384 4 6329 12463 118086 74893 16384 8 16097 17490 250826 344381 16384 16 22294 24390 467912 668244 16384 32 16441 29926 268321 578735 16384 64 19961 33637 305621 179483 16384 128 19926 35311 437746 834725 16384 256 37338 44050 493806 716366 16384 512 38332 56794 1046566 1312697 32768 4 8077 7031 131198 118426 32768 8 17500 9081 169629 178927 32768 16 14472 22879 259275 388031 32768 32 28046 38429 295358 406974 32768 64 25781 38275 1161039 852732 32768 128 37218 51762 1175698 957010 32768 256 33804 40951 1192437 651441 32768 512 36225 40157 796033 499199 65536 4