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: Tue Sep 29 20:22:42 2026 Auto Mode Machine = Linux oleg128-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-oleg128-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 1512 12192 555990 821391 64 8 3099 18778 653436 418250 64 16 4922 15759 889431 603489 64 32 4818 31652 998622 863676 64 64 4193 61783 1138375 1518251 128 4 5047 8574 633247 509943 128 8 5604 13029 260136 32569 128 16 10337 33844 547377 871818 128 32 3159 42552 680612 1032829 128 64 2590 62962 955616 927549 128 128 12968 84709 1269781 188256 256 4 9694 18345 629094 458118 256 8 4814 18915 879535 445942 256 16 11406 29684 367366 364746 256 32 17439 41618 951219 937924 256 64 14340 44274 1213534 855703 256 128 31904 119227 664935 1437779 256 256 12395 61346 1384034 433169 512 4 9906 13974 464943 492790 512 8 16758 22710 406350 623578 512 16 21814 21359 425935 325681 512 32 15917 17808 371806 162641 512 64 34475 47980 549255 121499 512 128 8793 62576 713258 528441 512 256 31449 89274 1514652 444447 512 512 25764 104338 1579257 282422 1024 4 5363 10777 521689 114707 1024 8 15960 20795 599537 187513 1024 16 25691 43888 1067920 728849 1024 32 25982 51931 188303 792019 1024 64 31579 48452 673635 432054 1024 128 22643 37485 541486 493969 1024 256 25901 91460 587482 552066 1024 512 26739 39024 1723636 949834 2048 4 8581 7380 195604 292107 2048 8 6796 8415 886583 247257 2048 16 19223 23738 957436 222509 2048 32 21112 35797 913453 740651 2048 64 26080 39226 1292923 863413 2048 128 27569 64453 310164 944176 2048 256 32552 62524 1579088 1003871 2048 512 46018 65676 1009297 732754 4096 4 5686 10624 295167 334474 4096 8 12821 12503 479177 323210 4096 16 18563 23522 619567 641212 4096 32 27451 21963 804534 627350 4096 64 28163 36470 685090 547446 4096 128 18616 35780 1050833 381700 4096 256 37702 59949 1097558 651497 4096 512 34353 50191 869611 579347 8192 4 2099 5354 335764 191810 8192 8 9029 12726 276813 300523 8192 16 10848 15672 480832 407846 8192 32 14829 27442 746094 757125 8192 64 21293 57343 934938 699922 8192 128 28950 39092 483791 738556 8192 256 23675 35517 1055118 519101 8192 512 33384 49944 1195046 772097 16384 4 6027 6788 145497 345958 16384 8 8594 9040 258903 184547 16384 16 17141 16394 253194 626443 16384 32 17104 21960 267835 588735 16384 64 21040 32677 811531 555952 16384 128 25857 40991 460988 315052 16384 256 33967 39526 988658 714831 16384 512 31670 48208 946225 769278 32768 4 5088 5603 220320 166051 32768 8 7435 10804 618520 381671 32768 16