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: Sun Nov 16 22:16:34 2025 Auto Mode Machine = Linux oleg219-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-oleg219-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 3530 17255 186051 185025 64 8 1861 25994 145745 278227 64 16 4510 37915 621657 615952 64 32 5324 22229 789967 703068 64 64 2694 17791 939223 1562436 128 4 3820 15381 231929 240662 128 8 7500 25927 421139 394814 128 16 6832 44852 646205 426492 128 32 8070 59587 895074 609522 128 64 6887 80553 233137 1133103 128 128 5478 31754 1526043 1579934 256 4 9165 5862 306975 262541 256 8 5317 28246 476624 416856 256 16 14451 44467 624339 686620 256 32 11419 33697 666586 247816 256 64 10358 15096 987979 1036624 256 128 10975 26706 1208072 178903 256 256 17600 113722 1561112 2030503 512 4 5613 8258 171116 243677 512 8 8619 19645 337081 455090 512 16 15717 43166 693899 474497 512 32 11228 69330 680918 531186 512 64 21799 76144 1113374 978885 512 128 14201 56073 1326585 1073309 512 256 10780 95465 1747618 1422357 512 512 13350 111183 1488408 1897396 1024 4 5595 8998 125489 173409 1024 8 17970 27956 276990 375506 1024 16 13550 18823 449320 418947 1024 32 29381 65373 1009913 808113 1024 64 23824 91070 1044799 979064 1024 128 18451 80344 1294520 1164956 1024 256 29244 52854 1452570 1213334 1024 512 23565 83811 1416636 1087111 2048 4 7220 6860 130930 195102 2048 8 9385 18572 133645 164590 2048 16 13164 29645 218474 191886 2048 32 24023 26808 484272 778440 2048 64 34004 47306 326951 250422 2048 128 36874 104129 1192747 1132070 2048 256 49803 72534 1079028 780774 2048 512 27247 91702 1484913 388108 4096 4 8354 10024 208587 170696 4096 8 8169 15222 149369 255201 4096 16 18072 16130 402359 428855 4096 32 25710 33681 335545 141789 4096 64 46244 68365 1159407 931117 4096 128 54117 87163 1122808 731967 4096 256 55607 90282 1742237 636225 4096 512 24976 94687 897270 1287961 8192 4 9429 7967 260443 209958 8192 8 15609 11936 281192 336745 8192 16 28259 22681 223775 213577 8192 32 30752 25891 742691 357992 8192 64 21557 36808 898932 406250 8192 128 39528 47201 316135 244881 8192 256 28445 64615 686908 1180552 8192 512 38051 42786 1416849 760713 16384 4 8069 9938 150871 129062 16384 8 14802 17568 375297 360673 16384 16 15962 23427 474608 516797 16384 32 29348 45536 601442 408760 16384 64 34066 47860 442655 854360 16384 128 26903 54069 530141 684206 16384 256 44533 62198 708807 948969 16384 512 48992 56155 797618 463516 32768 4 10177 10413 131216 165218 32768 8 14139 19334 223277 225283 32768 16 25545 34554 470203 509071 32768 32 37954 45842 826681 601370 32768 64 43719 63972 1130516 716836 32768 128 49341 65993 1103335 1023518 32768 256 49129 60483 622812 1022879 32768 512 46991 70492 1299858 1327504 65536 4 11791 11396 157864 234578 65536 8