Hello, maybe a beginners question from me. I setup bacula and I'm very impressed about it. I have a LTO-5 drive and use data spooling to a 6x1TB RAID0 array before streaming to disk. But thoughput is maybe low. The drive writes while reading at 140MB from disk for 7-8 seconds, stops for 4-5 seconds and starts again. Is this normal behaviour? Or is this already shoe shining? The data is almost non compressable. This is what a disk stat looks like:
----total-cpu-usage---- -dsk/total- -net/total- ---paging-- ---system-- usr sys idl wai hiq siq| read writ| recv send| in out | int csw 0 0 100 0 0 0| 0 0 | 945B 374B| 0 0 | 55 80 0 0 100 0 0 0| 0 0 |1722B 2950B| 0 0 | 182 269 0 0 100 0 0 0| 0 0 | 262B 358B| 0 0 | 43 68 0 0 100 0 0 0| 0 0 | 666B 358B| 0 0 | 44 70 0 0 99 1 0 0|6504k 40k|3728B 1622B| 0 0 | 320 594 4 1 96 0 0 0| 142M 0 | 993B 925B| 0 0 |3851 7111 2 1 98 0 0 0| 137M 0 | 972B 1038B| 0 0 |3749 6931 3 1 96 0 0 0| 141M 0 | 818B 849B| 0 0 |3898 7089 2 1 97 0 0 0| 137M 0 | 224B 358B| 0 0 |3695 6853 3 1 97 0 0 0| 142M 0 | 445B 422B| 0 0 |3854 7082 3 1 96 0 0 0| 125M 0 |1095B 358B| 0 0 |3402 6248 0 0 98 2 0 0| 12M 272k| 913B 915B| 0 0 | 513 886 2 1 96 0 0 0| 107M 0 | 289B 374B| 0 0 |2857 5306 0 0 100 0 0 0| 0 0 | 461B 358B| 0 0 | 42 70 0 0 100 0 0 0| 0 0 | 606B 358B| 0 0 | 63 109 0 0 100 0 0 0| 0 0 | 745B 542B| 0 0 | 95 178 0 0 100 0 0 0| 0 0 | 543B 819B| 0 0 | 78 130 1 1 98 0 0 0| 60M 40k| 797B 879B| 0 0 |1646 3032 3 1 96 0 0 0| 137M 0 | 224B 374B| 0 0 |3751 6832 2 1 97 0 0 0| 137M 0 | 930B 839B| 0 0 |3783 6925 1 1 98 0 0 0| 142M 0 |1665B 1042B| 0 0 |3866 7192 2 1 97 0 0 0| 136M 0 | 574B 358B| 0 0 |3725 6876 2 1 97 0 0 0| 140M 0 |3883B 5597B| 0 0 |4146 7534 2 0 98 0 0 0| 77M 0 | 545B 1149B| 0 0 |2091 3872 3 0 95 2 0 0| 101M 272k| 326B 358B| 0 0 |2859 5217 1 0 99 0 0 0| 17M 0 | 512B 374B| 0 0 | 491 913 0 0 100 0 0 0| 0 0 | 198B 358B| 0 0 | 41 64 0 0 100 0 0 0| 0 0 |2663B 1581B| 0 0 | 134 258 0 0 100 0 0 0| 0 0 | 288B 422B| 0 0 | 51 80 0 0 100 0 0 0| 0 40k| 224B 358B| 0 0 | 45 77 1 1 98 0 0 0| 105M 0 | 852B 358B| 0 0 |2794 5209 3 1 96 0 0 0| 144M 0 | 377B 358B| 0 0 |3888 7145 2 0 98 0 0 0| 135M 0 | 355B 422B| 0 0 |3621 6730 2 1 97 0 0 0| 140M 0 | 282B 358B| 0 0 |3771 7001 2 1 97 0 0 0| 137M 32k|1097B 358B| 0 0 |3730 6815 1 1 98 0 0 0| 140M 0 |2658B 374B| 0 0 |3734 7002 1 0 99 0 0 0| 30M 0 |1008B 358B| 0 0 | 883 1619 2 0 96 2 0 0| 118M 288k|5056B 5649B| 0 0 |3614 6517 0 0 100 0 0 0| 0 0 |2737B 2592B| 0 0 | 173 334 0 0 100 0 0 0| 0 0 | 503B 721B| 0 0 | 46 66 0 0 100 0 0 0| 0 0 |1063B 358B| 0 0 | 53 80 0 0 100 0 0 0| 0 0 |1114B 358B| 0 0 | 148 296 0 0 99 1 0 0| 19M 40k|1914B 2190B| 0 0 | 567 1031 3 0 97 0 0 0| 137M 0 |1252B 993B| 0 0 |3740 6908 2 1 97 0 0 0| 137M 0 | 198B 358B| 0 0 |3665 6849 2 1 98 0 0 0| 142M 0 | 640B 358B| 0 0 |3821 7059 3 1 96 0 0 0| 139M 0 | 313B 358B| 0 0 |3760 6889 3 1 96 0 0 0| 140M 0 | 436B 422B| 0 0 |3784 6973 2 1 98 0 0 0| 116M 0 | 224B 358B| 0 0 |3153 5809 1 0 97 2 0 0| 24M 272k| 467B 358B| 0 0 | 841 1449 2 1 98 0 0 0| 94M 0 |1102B 896B| 0 0 |2553 4742 0 0 100 0 0 0| 0 0 | 574B 358B| 0 0 | 49 80 0 0 100 0 0 0| 0 0 | 441B 358B| 0 0 | 70 88 0 0 100 0 0 0| 0 0 | 282B 358B| 0 0 | 47 78 0 0 100 0 0 0| 0 0 | 262B 358B| 0 0 | 37 56 1 1 97 0 0 0| 70M 40k| 755B 422B| 0 0 |1977 3590 3 1 96 0 0 0| 136M 0 |1201B 1705B| 0 0 |3669 6828 2 1 98 0 0 0| 142M 0 | 750B 358B| 0 0 |3755 7050 2 1 97 0 0 0| 140M 0 | 224B 358B| 0 0 |3759 6967 From the same array, when I do a "cat testfile > /dev/zero" the array performs much better: ----total-cpu-usage---- -dsk/total- -net/total- ---paging-- ---system-- usr sys idl wai hiq siq| read writ| recv send| in out | int csw 0 13 88 0 0 0| 0 0 | 526B 422B| 0 0 | 439 84 0 13 87 0 0 0| 0 0 |1693B 1843B| 0 0 | 495 158 0 13 87 0 0 0| 200k 0 | 762B 760B| 0 0 | 465 103 0 12 86 1 0 0|1108k 0 |2007B 1156B| 0 0 | 546 181 0 13 88 0 0 0| 0 1536B| 258B 476B| 0 0 | 448 117 0 13 87 0 0 0| 92k 8192B|1904B 1547B| 0 0 | 612 220 0 13 87 0 0 0| 0 0 |1162B 910B| 0 0 | 588 91 0 13 88 0 0 0| 0 0 | 698B 712B| 0 0 | 553 104 0 13 88 0 0 0| 0 0 |1264B 830B| 0 0 | 493 155 0 13 87 0 0 0| 0 0 |2211B 1933B| 0 0 | 489 166 0 13 82 5 0 0| 150M 0 |1284B 862B| 0 0 |1747 1538 0 14 75 11 0 0| 388M 28k| 352B 358B| 0 0 |3770 2703 0 14 75 12 0 0| 316M 0 | 70B 374B| 0 0 |3139 2257 0 18 75 7 0 0| 214M 0 | 788B 358B| 0 0 |2382 1560 0 14 75 11 0 0| 385M 0 | 134B 422B| 0 0 |3699 2666 0 14 69 17 0 0| 366M 3200k| 224B 358B| 0 0 |3538 2793 0 14 76 11 0 0| 307M 7188k| 474B 374B| 0 0 |3129 3072 0 14 75 12 0 0| 316M 1024k| 134B 374B| 0 0 |3126 3366 0 14 75 11 0 0| 350M 512k| 640B 374B| 0 0 |3405 3778 0 15 68 18 0 0| 315M 26M| 134B 374B| 0 0 |3411 3391 0 15 74 11 0 0| 189M 55M|1385B 1286B| 0 0 |2507 1786 0 14 75 12 0 0| 264M 13M| 555B 865B| 0 0 |2794 2578 0 14 75 12 0 0| 281M 6784k| 70B 374B| 0 0 |2898 2562 0 14 75 11 0 0| 393M 0 |2944B 1675B| 0 0 |4024 4162 0 14 75 12 0 0| 304M 3456k| 349B 730B| 0 0 |3088 2573 0 14 75 12 0 0| 319M 6272k| 352B 502B| 0 0 |3218 2484 0 14 75 11 0 0| 331M 6656k| 346B 374B| 0 0 |3344 3646 0 14 73 13 0 0| 274M 9984k|2394B 2187B| 0 0 |3029 2513 0 14 75 11 0 0| 19M 262M|1258B 1560B| 0 0 |2629 531 0 13 88 0 0 0| 0 0 | 134B 374B| 0 0 | 421 68 0 13 88 0 0 0| 0 0 | 590B 358B| 0 0 | 423 58 0 13 87 0 0 0| 0 0 | 288B 358B| 0 0 | 430 66 Is there anything wrong here? If I'm right about 140MB/s for an LTO5 are quite ok since the data cannot be compressed. Thanks for any input :-) Frank. ------------------------------------------------------------------------------ Master Java SE, Java EE, Eclipse, Spring, Hibernate, JavaScript, jQuery and much more. Keep your Java skills current with LearnJavaNow - 200+ hours of step-by-step video tutorials by Java experts. SALE $49.99 this month only -- learn more at: http://p.sf.net/sfu/learnmore_122612 _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
