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 Oct 24 01:48:23 2025 Auto Mode Machine = Linux oleg450-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-oleg450-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 5001 15440 336889 272300 64 8 7601 28624 426897 380864 64 16 5187 41859 679917 727850 64 32 6673 63432 1033216 842003 64 64 5639 30738 1143223 1049372 128 4 3917 15241 240124 275204 128 8 3575 10806 395104 295665 128 16 11332 40998 586868 586868 128 32 10478 52999 612303 462100 128 64 11687 84376 843068 876086 128 128 8774 46729 853794 1436229 256 4 5880 12615 270068 21342 256 8 8190 13534 348752 421107 256 16 9083 25533 498995 627623 256 32 7467 56140 802614 828628 256 64 14139 94363 1079348 449112 256 128 16347 99459 1347557 1361224 256 256 9184 37047 1552085 2131261 512 4 6400 14172 125798 140820 512 8 19519 27024 443621 385281 512 16 11912 25327 735740 668413 512 32 16340 21439 646480 788992 512 64 28256 86985 946109 984268 512 128 39822 104212 1227971 991998 512 256 35373 99962 1734911 1496706 512 512 24986 102978 1565443 2116152 1024 4 5143 8458 156357 326842 1024 8 22156 16913 262035 407964 1024 16 25300 18110 672791 465235 1024 32 28698 73399 878890 769320 1024 64 11810 71949 836604 810706 1024 128 16493 87618 1379773 1145383 1024 256 26213 47823 1446211 1328146 1024 512 42654 129734 1692394 1651398 2048 4 13191 8287 103376 94443 2048 8 23276 20139 426049 368337 2048 16 14586 11770 680185 248394 2048 32 44117 78284 1153196 241508 2048 64 18070 79432 1065510 1012748 2048 128 29434 72244 1146118 1120405 2048 256 39004 59183 1294482 958291 2048 512 39663 68017 370338 1524983 4096 4 9266 10789 263422 169973 4096 8 16167 15990 173706 201931 4096 16 29975 42830 517702 377647 4096 32 45200 43690 661608 508689 4096 64 34561 54083 421966 756262 4096 128 41279 63240 1456685 1134673 4096 256 58038 47214 1495487 1325524 4096 512 34242 92385 913055 1264545 8192 4 6592 9642 258969 133199 8192 8 15552 14729 318199 230937 8192 16 21074 23700 355956 587790 8192 32 21519 44398 230786 594749 8192 64 39301 33910 833371 2851 8192 128 41609 42081 837025 343639 8192 256 52049 54285 1429701 1136956 8192 512 44142 70048 654149 1256857 16384 4 7788 8923 172057 157251 16384 8 15924 15451 224758 234869 16384 16 29230 29880 615452 572524 16384 32 35830 47876 454494 478545 16384 64 51145 66271 1096865 943445 16384 128 47104 74110 1154293 1053498 16384 256 63341 64885 615888 739453 16384 512 65975 66558 1442389 1071752 32768 4 11709 12809 185984 139677 32768 8 17820 19185 330349 341091 32768 16 27728 29012 353766 288384 32768 32 29175 36035 712330 727514 32768 64 37172 46202 725325 727371 32768 128 40069 48022 1366249 1101593 32768 256 42930 46348 1119621 1075457 32768 512 42093 72398 1290424 599312 65536 4 11244 13947 236012 208408 65536 8 17261 21540 204261 355355 65536 16