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: Thu Sep 10 10:22:32 2026 Auto Mode Machine = Linux oleg402-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-oleg402-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 1826 6974 515423 477808 64 8 2895 22947 799377 679917 64 16 5562 38619 1049372 913649 64 32 3774 30216 1210227 983980 64 64 3763 71282 1183548 735831 128 4 5293 11437 462100 501839 128 8 4807 17062 419822 761728 128 16 7165 58452 330828 971174 128 32 8575 56088 1281909 955616 128 64 9493 65203 1336145 1359835 128 128 5945 94191 1332828 1802755 256 4 6462 8908 643033 286728 256 8 6044 29987 405062 530031 256 16 10714 21804 1062263 821025 256 32 9410 42467 1453348 408297 256 64 14051 63147 917096 934659 256 128 12228 68742 1093639 1471270 256 256 13971 50534 408297 785010 512 4 8252 4969 308599 526756 512 8 12270 13417 589837 496550 512 16 11149 23884 771143 723105 512 32 20426 47380 598050 740816 512 64 21737 26252 1538526 1218910 512 128 16447 45944 867738 1227971 512 256 22827 46297 1347393 896725 512 512 31267 42433 1312798 2237414 1024 4 7853 7741 443474 274459 1024 8 9357 21826 369275 803127 1024 16 19772 13123 634055 657647 1024 32 20593 35353 441741 1083546 1024 64 19317 51527 1399100 251229 1024 128 17766 86985 206451 1248607 1024 256 33786 33349 612097 818587 1024 512 22260 103192 1510288 1602118 2048 4 5241 4344 112551 186063 2048 8 11618 20186 864456 303726 2048 16 10710 26618 521778 623823 2048 32 31248 48631 616481 1157703 2048 64 18262 35493 349841 611914 2048 128 26717 40111 792297 1122162 2048 256 18990 58238 1226291 306085 2048 512 47172 85124 749374 1459680 4096 4 6962 11791 476440 254411 4096 8 14192 13733 472639 455979 4096 16 16598 17714 462772 260958 4096 32 15608 30232 561088 451000 4096 64 17940 29656 431245 390462 4096 128 27806 31963 1585179 316045 4096 256 52162 69778 1653690 949016 4096 512 53284 60809 1067815 829993 8192 4 6490 8800 421965 350957 8192 8 14494 13058 486345 469101 8192 16 19836 18411 378979 288004 8192 32 25993 24183 521686 519211 8192 64 27183 32861 967885 862036 8192 128 32767 27908 993233 805020 8192 256 27582 56215 742226 696418 8192 512 25213 33177 339590 374029 16384 4 5826 6146 250132 197633 16384 8 8369 11795 500532 631028 16384 16 13574 21098 787193 412871 16384 32 16091 19176 370351 281919 16384 64 24054 28969 557680 558078 16384 128 27392 44355 973145 630154 16384 256 35125 35993 955554 480089 16384 512 29866 40555 808532 775721 32768 4 5314 5936 285728 375780 32768 8 7966 8869 318170 277647 32768 16 12588 16052 443277 251193 32768 32 15577 22145 684178 382558 32768 64 19516 27861 386351 287071 32768 128