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: Mon Jul 6 11:04:33 2026 Auto Mode Machine = Linux oleg348-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-oleg348-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 1539 5651 592827 74239 64 8 8109 9533 673098 674790 64 16 2642 14381 1013707 256923 64 32 10608 36592 1210227 901377 64 64 6570 83111 264519 763021 128 4 4560 12971 692017 483316 128 8 10775 15740 718889 549618 128 16 6033 4744 767171 901083 128 32 5826 49826 971174 1059322 128 64 4370 22460 1152564 1579934 128 128 5390 97936 1346196 1755594 256 4 6381 9425 272329 315638 256 8 5562 16139 917880 757326 256 16 7783 33893 1099237 398153 256 32 21726 19056 1132871 907792 256 64 12055 18289 1108314 654798 256 128 7261 45961 1369908 1479379 256 256 7899 45608 673696 1952947 512 4 11533 14306 602412 420678 512 8 17575 17022 850554 312779 512 16 18210 36109 978885 982917 512 32 9709 20434 1187895 1030064 512 64 27783 59053 696600 1155924 512 128 28738 36498 1450212 530006 512 256 33292 115289 1467055 1580419 512 512 31374 119127 1741948 1917728 1024 4 5557 9254 392923 358158 1024 8 10795 6947 349844 530583 1024 16 11602 23331 686776 279860 1024 32 18976 51161 240711 421041 1024 64 41877 49757 1090423 729344 1024 128 23083 41400 1054547 1270773 1024 256 51251 110094 238082 1113030 1024 512 56749 111511 1436056 1047091 2048 4 5114 6432 295778 83512 2048 8 6562 9497 384753 329371 2048 16 21974 31458 333113 899864 2048 32 14152 33221 1235996 1041228 2048 64 26661 34479 653435 349187 2048 128 21797 28001 958825 339230 2048 256 25703 28921 1317918 273871 2048 512 24666 63057 902227 1386635 4096 4 5667 5396 395668 333280 4096 8 13759 18498 300295 347708 4096 16 20810 23952 757396 516970 4096 32 15402 24440 486408 447802 4096 64 28081 28337 407561 417576 4096 128 29546 69984 1491721 838827 4096 256 27184 48022 357104 490842 4096 512 27458 72484 1156363 741348 8192 4 4930 5237 231308 253332 8192 8 7797 13058 550647 374098 8192 16 17118 16829 567509 392280 8192 32 27914 37718 620650 427244 8192 64 20898 40828 362816 340031 8192 128 33604 45241 881430 464849 8192 256 41444 50577 676575 394931 8192 512 27188 51086 943124 1017529 16384 4 5056 5403 243118 212607 16384 8 8412 9237 286097 254481 16384 16 15497 17600 652750 440606 16384 32 25198 30900 938805 817720 16384 64 27735 28013 1081093 803569 16384 128 31726 39373 760383 610135 16384 256 42705 46552 1293231 755683 16384 512 43166 58491 741591 450531 32768 4 4978 5082 261551 237680 32768 8 8737 9771 316565 226313 32768 16