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 Nov 14 15:43:12 2025 Auto Mode Machine = Linux oleg329-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-oleg329-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 8982 15667 306151 236339 64 8 10645 28998 460591 246314 64 16 13462 53115 703068 123316 64 32 3211 64453 801764 666414 64 64 5668 75662 703068 123090 128 4 3897 4800 253383 242839 128 8 13676 8375 450468 355589 128 16 10607 29017 670413 646983 128 32 21537 38003 836500 643108 128 64 14988 88697 1243315 955616 128 128 27807 112297 1373754 1705404 256 4 14300 6102 262798 253431 256 8 10288 25271 338207 392764 256 16 28600 55245 686620 583299 256 32 32799 74504 910872 787890 256 64 15513 101874 1053922 1003679 256 128 44872 114951 1190657 1208072 256 256 36056 144401 1814348 970126 512 4 15885 18731 297319 197074 512 8 25005 24114 458002 436852 512 16 15623 42300 641651 104771 512 32 27244 25889 121300 260686 512 64 52416 39167 973118 1024169 512 128 30873 61702 1261144 1132755 512 256 23770 107246 1662389 1541840 512 512 32860 159512 1747618 2141475 1024 4 8172 10872 100432 199684 1024 8 14115 10257 285402 123508 1024 16 31164 14494 321291 581437 1024 32 37525 32157 811319 819211 1024 64 22874 29075 986485 989440 1024 128 40298 85705 299513 1114185 1024 256 32852 36363 177318 1050164 1024 512 62884 124046 1374474 964986 2048 4 8253 11049 100308 106174 2048 8 9712 17647 421761 194255 2048 16 13993 18281 618345 239555 2048 32 19988 44260 904222 704739 2048 64 43498 38076 1028142 423132 2048 128 35478 30339 1280778 1054522 2048 256 25293 80464 1016824 1482862 2048 512 34649 73650 1587551 957009 4096 4 6808 8056 207089 186326 4096 8 13086 9703 277543 234243 4096 16 11970 23042 452544 389506 4096 32 24410 42712 826638 813371 4096 64 30907 60137 1084737 283011 4096 128 30262 60696 1307368 981998 4096 256 36201 43331 394333 1255213 4096 512 38075 51903 1546230 390542 8192 4 8278 9239 152998 186759 8192 8 14537 20438 353147 339356 8192 16 16622 29031 774150 187164 8192 32 39413 29815 624009 620135 8192 64 31587 46043 908199 744590 8192 128 37467 53065 615944 400296 8192 256 47457 57740 1275237 913487 8192 512 50253 48010 1010497 1052694 16384 4 9149 11108 126342 165364 16384 8 18182 17211 270568 387731 16384 16 23203 25944 199182 343127 16384 32 29441 42814 679578 339479 16384 64 43962 68128 756874 749387 16384 128 51221 65860 996471 888355 16384 256 50970 65348 983029 815208 16384 512 61613 72175 835283 1304771 32768 4 9122 9635 247470 195155 32768 8 14291 18151 279543 291205 32768 16 21705 22039 324731 228459 32768 32 26639 33226 790234 290074 32768 64 30764 35141 799901 281662 32768 128 31602 40007 275132 675309 32768 256 31025 56562 703963 270697 32768 512 38547 67053 1566348 1030896 65536 4