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: Thu Aug 6 20:41:08 2026 Auto Mode Machine = Linux oleg201-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-oleg201-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 1881 6883 176392 571375 64 8 2044 10559 603489 639427 64 16 5557 26892 969761 983980 64 32 1924 20867 942521 1210227 64 64 2724 17837 1363961 1066042 128 4 3140 4503 240124 476031 128 8 2124 9930 615109 699227 128 16 4745 11472 221865 556454 128 32 1983 9162 1152564 985435 128 64 2686 70763 1306873 1319723 128 128 6239 28445 1406136 201542 256 4 4375 5912 279780 264741 256 8 4450 11029 284073 677095 256 16 13182 13246 930608 981656 256 32 13126 33049 544547 1152323 256 64 17240 21115 984356 1142514 256 128 7508 28942 29885 455592 256 256 10454 49164 446870 2000242 512 4 3741 3838 558396 539595 512 8 3173 6831 778128 78588 512 16 9138 7917 988345 263113 512 32 6783 10947 990625 912345 512 64 12695 46448 1410215 1160923 512 128 16271 70534 1038532 1024169 512 256 8035 81001 2116152 1550747 512 512 21582 48264 1605228 2073249 1024 4 8216 7163 535278 693317 1024 8 16028 11854 222654 396441 1024 16 8764 16697 1098511 1646334 1024 32 19837 9733 676713 392169 1024 64 10162 18487 405843 317327 1024 128 22475 86078 1264413 1070048 1024 256 33753 69310 1565902 1127641 1024 512 25140 97209 2216407 1416169 2048 4 7222 4343 265968 487045 2048 8 5832 14237 238942 636819 2048 16 20568 14801 389958 273105 2048 32 21653 31408 280169 663222 2048 64 32492 32792 1348116 403874 2048 128 38442 46011 390171 1223496 2048 256 15462 39624 581469 289517 2048 512 33217 48096 1056208 670156 4096 4 6533 5300 181479 324437 4096 8 9674 9896 251532 214472 4096 16 9381 13338 519142 274843 4096 32 10861 14461 510913 492065 4096 64 25301 32398 344985 341217 4096 128 20162 37977 954765 526073 4096 256 39455 41434 714850 238431 4096 512 1522 27002 1514204 877831 8192 4 4419 5041 194736 272014 8192 8 8975 8873 203694 287157 8192 16 14218 14200 731761 436326 8192 32 21709 20268 456785 651236 8192 64 15917 27389 994671 552355 8192 128 32749 39168 746013 737494 8192 256 33430 30921 690553 240729 8192 512 26191 32251 783846 478702 16384 4 4556 5848 200452 238931 16384 8 9143 10007 556767 300701 16384 16 12111 16806 401235 512114 16384 32 15311 20937 727792 627593 16384 64 23929 30581 868352 423481 16384 128 26069 29503 575141 364177 16384 256 27533 35948 488328 869032 16384 512 27973 60079 915761 818792 32768 4 4975 6680 439495 239241 32768 8 9317 9659 624924 554637 32768 16