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 Jun 23 10:45:19 2026 Auto Mode Machine = Linux oleg436-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-oleg436-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 3403 6597 614542 537079 64 8 3772 15567 852702 752329 64 16 2787 14887 551422 149562 64 32 3093 45715 1392258 1279447 64 64 2707 47095 1143223 1648808 128 4 2754 8053 579270 75692 128 8 2800 13982 992724 731625 128 16 2643 34982 1032829 864797 128 32 4501 34307 1291158 1123617 128 64 9157 42609 1266785 1406136 128 128 6105 97936 1618028 1911894 256 4 5580 10918 558715 648079 256 8 2995 7545 775933 852984 256 16 13521 12061 910872 985259 256 32 9954 36534 1108314 502969 256 64 12613 23111 1266495 1248819 256 128 12579 46937 1598292 1619994 256 256 4779 62836 1168627 1790149 512 4 5739 9779 189559 411253 512 8 10439 16469 746222 358283 512 16 9300 16570 1127995 768658 512 32 23878 42765 1325766 63224 512 64 16048 64039 1565443 1258188 512 128 8367 21450 1506154 556515 512 256 13303 53211 1450212 863203 512 512 22302 68799 1571169 1442420 1024 4 2682 6724 345704 81977 1024 8 6630 12634 462679 191194 1024 16 10148 17043 945443 107248 1024 32 14817 24624 1262926 1019019 1024 64 17104 30336 267785 1072453 1024 128 31520 77717 1044799 1130014 1024 256 15812 51400 1580306 1486247 1024 512 31609 85355 1695065 1687075 2048 4 5851 6555 217528 341836 2048 8 10621 11590 230708 812686 2048 16 19907 12844 200705 674789 2048 32 14678 29372 960541 1088186 2048 64 19885 30322 239281 1131474 2048 128 29079 40630 496705 1394287 2048 256 24308 28808 336453 263917 2048 512 20475 61588 911901 461680 4096 4 4473 5617 196413 216822 4096 8 8099 10365 273087 272775 4096 16 10461 13859 697891 878235 4096 32 21085 29326 401175 360786 4096 64 20787 36822 615196 472158 4096 128 37667 45020 900799 530704 4096 256 25279 31812 514632 326323 4096 512 35917 72190 1456562 473642 8192 4 4774 8131 133994 198358 8192 8 2665 11499 544133 522249 8192 16 16316 15272 774150 237979 8192 32 17610 20990 521955 895582 8192 64 23266 39439 628702 763688 8192 128 30924 32122 571901 756708 8192 256 31047 55724 1324288 608893 8192 512 29231 43509 1215593 742098 16384 4 5344 6678 397776 409600 16384 8 8146 13208 428407 211386 16384 16 16294 19285 654890 427124 16384 32 21913 27958 549721 514268 16384 64 25231 27202 1096130 811569 16384 128 31979 31671 949520 714118 16384 256 40050 41659 893693 563973 16384 512 29006 62338 858791 582024 32768 4 4817 5416 303840 313668 32768 8 11521 11105 303736 272564 32768 16 14926 18523 410184 337619 32768 32 16755 19248 551286 535434 32768 64 23792 32696 798145 561518 32768 128