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: Fri Sep 11 08:48:59 2026 Auto Mode Machine = Linux oleg246-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-oleg246-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 3833 10455 598110 778512 64 8 1211 5117 769584 615952 64 16 1671 16498 208444 926260 64 32 6150 37518 1119387 863676 64 64 2960 73487 1143223 82575 128 4 5511 6861 571865 154414 128 8 9389 20632 901083 753179 128 16 13806 34388 1346196 809997 128 32 6111 23222 692017 927549 128 64 8028 63341 1424795 1997245 128 128 9195 85450 1377278 947186 256 4 2587 2609 271709 76878 256 8 6305 18201 39421 699594 256 16 6950 50864 920240 789628 256 32 11810 68466 980760 1003679 256 64 10582 55160 1190657 1190657 256 128 15771 63117 304710 1237306 256 256 10530 88674 227931 1829808 512 4 8847 4116 564413 524056 512 8 3247 4940 266377 701378 512 16 20554 26748 898225 500484 512 32 28600 20404 1380303 220893 512 64 24292 75040 787834 993834 512 128 13627 69830 1130370 1075459 512 256 25024 100331 1484293 679195 512 512 29469 60305 1556366 545904 1024 4 6957 4443 363124 616490 1024 8 8662 32649 806293 169675 1024 16 25301 25079 848504 257479 1024 32 13944 15016 123760 649296 1024 64 29221 28959 784783 979064 1024 128 14206 89081 772225 1244266 1024 256 17186 56753 624740 214407 1024 512 14472 53093 529732 726752 2048 4 5725 4284 116305 180090 2048 8 5763 8643 232067 210678 2048 16 9706 12871 1031228 697302 2048 32 16626 28928 962047 238862 2048 64 19974 30814 189703 221528 2048 128 43138 35271 576900 1349174 2048 256 18141 36354 1674514 1296240 2048 512 46459 52351 1735759 921191 4096 4 6670 1376 358670 360211 4096 8 11231 8163 502514 369278 4096 16 8970 19305 593272 487970 4096 32 11751 29440 1154731 416049 4096 64 16810 35674 925649 346565 4096 128 21469 31455 461107 654002 4096 256 34069 40156 986736 469179 4096 512 29938 31256 1609535 298978 8192 4 6961 6757 319314 187190 8192 8 7882 7595 311283 451200 8192 16 13477 15640 667856 584639 8192 32 20958 28625 1004294 322851 8192 64 21819 28901 771456 576053 8192 128 29541 40900 1199384 573668 8192 256 22135 36050 711723 664022 8192 512 20882 46094 588766 964922 16384 4 4614 4854 400165 250473 16384 8 5452 8247 202900 145840 16384 16 14968 13442 549374 435943 16384 32 16538 18784 579017 457947 16384 64 22341 26107 563506 728208 16384 128 23077 36369 1054160 801881 16384 256 24149 35958 685756 493345 16384 512 26157 43635 1332914 514510 32768 4