Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
>so this is not a bug in drbd, but web100 alters the timing "somehow" >that it takes several seconds to get one single data block through. Is that really the case (see below)? Do you have any guess about the "somehow"? The timing of what exactly? I gather that there are two separate lines of communication for each resource, the ping and the data stream and what's below is only the ping. The data stream is being ignored. Here's an excerpt from tcpdump taken from the acting primary (kennedy2), which lacks the web100 kernel, just after drbd has been brought up on the web100-based peer (kennedy1). There are two resources, one using port 7790 and the other using port 7791. 10:34:28.688257 IP (tos 0x0, ttl 64, id 15506, offset 0, flags [DF], proto: TCP (6), length: 84) kennedy1.aecom.yu.edu.7791 > kennedy2.aecom.yu.edu.55409: P 552:584(32) ack 9 win 1448 <nop,nop,timestamp 120929 102136654> 10:34:28.688412 IP (tos 0x0, ttl 64, id 12145, offset 0, flags [DF], proto: TCP (6), length: 52) kennedy2.aecom.yu.edu.55409 > kennedy1.aecom.yu.edu.7791: ., cksum 0xd602 (correct), ack 584 win 15974 <nop,nop,timestamp 102136655 120929> 10:34:28.695359 IP (tos 0x0, ttl 64, id 42373, offset 0, flags [DF], proto: TCP (6), length: 68) kennedy2.aecom.yu.edu.7791 > kennedy1.aecom.yu.edu.55735: P 66064:66080(16) ack 1 win 16022 <nop,nop,timestamp 102136656 120927> 10:34:28.695490 IP (tos 0x0, ttl 64, id 7974, offset 0, flags [DF], proto: TCP (6), length: 52) kennedy1.aecom.yu.edu.55735 > kennedy2.aecom.yu.edu.7791: ., cksum 0x2a0b (correct), ack 66080 win 16652 <nop,nop,timestamp 120930 102136656> 10:34:28.696493 IP (tos 0x0, ttl 64, id 15507, offset 0, flags [DF], proto: TCP (6), length: 84) kennedy1.aecom.yu.edu.7791 > kennedy2.aecom.yu.edu.55409: P 584:616(32) ack 9 win 1448 <nop,nop,timestamp 120931 102136655> 10:34:28.696636 IP (tos 0x0, ttl 64, id 12146, offset 0, flags [DF], proto: TCP (6), length: 52) kennedy2.aecom.yu.edu.55409 > kennedy1.aecom.yu.edu.7791: ., cksum 0xd5e6 (correct), ack 616 win 15966 <nop,nop,timestamp 102136657 120931> 10:34:28.696986 IP (tos 0x0, ttl 64, id 15508, offset 0, flags [DF], proto: TCP (6), length: 68) kennedy1.aecom.yu.edu.7791 > kennedy2.aecom.yu.edu.55409: P 616:632(16) ack 9 win 1448 <nop,nop,timestamp 120931 102136657> 10:34:28.697180 IP (tos 0x0, ttl 64, id 12147, offset 0, flags [DF], proto: TCP (6), length: 52) kennedy2.aecom.yu.edu.55409 > kennedy1.aecom.yu.edu.7791: ., cksum 0xd5d6 (correct), ack 632 win 15966 <nop,nop,timestamp 102136657 120931> 10:34:29.344913 IP (tos 0x0, ttl 64, id 3403, offset 0, flags [DF], proto: TCP (6), length: 60) kennedy1.aecom.yu.edu.7790 > kennedy2.aecom.yu.edu.54778: P 56:64(8) ack 57 win 1448 <nop,nop,timestamp 121093 102136069> 10:34:29.345381 IP (tos 0x0, ttl 64, id 52756, offset 0, flags [DF], proto: TCP (6), length: 60) kennedy2.aecom.yu.edu.54778 > kennedy1.aecom.yu.edu.7790: P 57:65(8) ack 64 win 1460 <nop,nop,timestamp 102136819 121093> 10:34:29.345765 IP (tos 0x0, ttl 64, id 3404, offset 0, flags [DF], proto: TCP (6), length: 52) kennedy1.aecom.yu.edu.7790 > kennedy2.aecom.yu.edu.54778: ., cksum 0x555b (correct), ack 65 win 1448 <nop,nop,timestamp 121093 102136819> 10:34:32.345066 IP (tos 0x0, ttl 64, id 3405, offset 0, flags [DF], proto: TCP (6), length: 60) kennedy1.aecom.yu.edu.7790 > kennedy2.aecom.yu.edu.54778: P 64:72(8) ack 65 win 1448 <nop,nop,timestamp 121843 102136819> 10:34:32.345526 IP (tos 0x0, ttl 64, id 52757, offset 0, flags [DF], proto: TCP (6), length: 60) kennedy2.aecom.yu.edu.54778 > kennedy1.aecom.yu.edu.7790: P 65:73(8) ack 72 win 1460 <nop,nop,timestamp 102137569 121843> 10:34:32.345843 IP (tos 0x0, ttl 64, id 3406, offset 0, flags [DF], proto: TCP (6), length: 52) kennedy1.aecom.yu.edu.7790 > kennedy2.aecom.yu.edu.54778: ., cksum 0x4f6f (correct), ack 73 win 1448 <nop,nop,timestamp 121843 102137569> 10:34:35.345206 IP (tos 0x0, ttl 64, id 3407, offset 0, flags [DF], proto: TCP (6), length: 60) kennedy1.aecom.yu.edu.7790 > kennedy2.aecom.yu.edu.54778: P 72:80(8) ack 73 win 1448 <nop,nop,timestamp 122593 102137569> 10:34:35.345488 IP (tos 0x0, ttl 64, id 52758, offset 0, flags [DF], proto: TCP (6), length: 60) kennedy2.aecom.yu.edu.54778 > kennedy1.aecom.yu.edu.7790: P 73:81(8) ack 80 win 1460 <nop,nop,timestamp 102138319 122593> 10:34:35.345874 IP (tos 0x0, ttl 64, id 3408, offset 0, flags [DF], proto: TCP (6), length: 52) kennedy1.aecom.yu.edu.7790 > kennedy2.aecom.yu.edu.54778: ., cksum 0x4983 (correct), ack 81 win 1448 <nop,nop,timestamp 122593 102138319> 10:34:36.720318 IP (tos 0x0, ttl 64, id 42374, offset 0, flags [DF], proto: TCP (6), length: 1500) kennedy2.aecom.yu.edu.7791 > kennedy1.aecom.yu.edu.55735: . 66080:67528(1448) ack 1 win 16022 <nop,nop,timestamp 102138662 120930> 10:34:36.720352 IP (tos 0x0, ttl 64, id 42375, offset 0, flags [DF], proto: TCP (6), length: 1500) kennedy2.aecom.yu.edu.7791 > kennedy1.aecom.yu.edu.55735: . 67528:68976(1448) ack 1 win 16022 <nop,nop,timestamp 102138662 120930> 10:34:36.720371 IP (tos 0x0, ttl 64, id 42376, offset 0, flags [DF], proto: TCP (6), length: 1276) kennedy2.aecom.yu.edu.7791 > kennedy1.aecom.yu.edu.55735: P 68976:70200(1224) ack 1 win 16022 <nop,nop,timestamp 102138662 120930> 10:34:36.720805 IP (tos 0x0, ttl 64, id 7975, offset 0, flags [DF], proto: TCP (6), length: 52) kennedy1.aecom.yu.edu.55735 > kennedy2.aecom.yu.edu.7791: ., cksum 0x14b6 (correct), ack 67528 win 16652 <nop,nop,timestamp 122937 102138662> 10:34:36.721297 IP (tos 0x0, ttl 64, id 42377, offset 0, flags [DF], proto: TCP (6), length: 1500) kennedy2.aecom.yu.edu.7791 > kennedy1.aecom.yu.edu.55735: . 70200:71648(1448) ack 1 win 16022 <nop,nop,timestamp 102138663 122937> 10:34:36.721315 IP (tos 0x0, ttl 64, id 42378, offset 0, flags [DF], proto: TCP (6), length: 1500) kennedy2.aecom.yu.edu.7791 > kennedy1.aecom.yu.edu.55735: . 71648:73096(1448) ack 1 win 16022 <nop,nop,timestamp 102138663 122937> 10:34:36.720982 IP (tos 0x0, ttl 64, id 7976, offset 0, flags [DF], proto: TCP (6), length: 52) kennedy1.aecom.yu.edu.55735 > kennedy2.aecom.yu.edu.7791: ., cksum 0x0f0e (correct), ack 68976 win 16652 <nop,nop,timestamp 122937 102138662> 10:34:36.721188 IP (tos 0x0, ttl 64, id 7977, offset 0, flags [DF], proto: TCP (6), length: 52) kennedy1.aecom.yu.edu.55735 > kennedy2.aecom.yu.edu.7791: ., cksum 0x0a46 (correct), ack 70200 win 16652 <nop,nop,timestamp 122937 102138662> 10:34:36.721678 IP (tos 0x0, ttl 64, id 42379, offset 0, flags [DF], proto: TCP (6), length: 1284) kennedy2.aecom.yu.edu.7791 > kennedy1.aecom.yu.edu.55735: P 73096:74328(1232) ack 1 win 16022 <nop,nop,timestamp 102138663 122937> 10:34:36.721795 IP (tos 0x0, ttl 64, id 7978, offset 0, flags [DF], proto: TCP (6), length: 52) kennedy1.aecom.yu.edu.55735 > kennedy2.aecom.yu.edu.7791: ., cksum 0x049d (correct), ack 71648 win 16652 <nop,nop,timestamp 122937 102138663> 10:34:36.721916 IP (tos 0x0, ttl 64, id 7979, offset 0, flags [DF], proto: TCP (6), length: 52) kennedy1.aecom.yu.edu.55735 > kennedy2.aecom.yu.edu.7791: ., cksum 0xfef4 (correct), ack 73096 win 16652 <nop,nop,timestamp 122937 102138663> 10:34:36.722159 IP (tos 0x0, ttl 64, id 7980, offset 0, flags [DF], proto: TCP (6), length: 52) kennedy1.aecom.yu.edu.55735 > kennedy2.aecom.yu.edu.7791: ., cksum 0xfa24 (correct), ack 74328 win 16652 <nop,nop,timestamp 122937 102138663> 10:34:36.736392 IP (tos 0x0, ttl 64, id 15509, offset 0, flags [DF], proto: TCP (6), length: 84) kennedy1.aecom.yu.edu.7791 > kennedy2.aecom.yu.edu.55409: P 632:664(32) ack 9 win 1448 <nop,nop,timestamp 122941 102136657> 10:34:36.736567 IP (tos 0x0, ttl 64, id 12148, offset 0, flags [DF], proto: TCP (6), length: 52) kennedy2.aecom.yu.edu.55409 > kennedy1.aecom.yu.edu.7791: ., cksum 0xc602 (correct), ack 664 win 15966 <nop,nop,timestamp 102138667 122941> 10:34:36.736883 IP (tos 0x0, ttl 64, id 42380, offset 0, flags [DF], proto: TCP (6), length: 68) kennedy2.aecom.yu.edu.7791 > kennedy1.aecom.yu.edu.55735: P 74328:74344(16) ack 1 win 16022 <nop,nop,timestamp 102138667 122937> 10:34:36.736975 IP (tos 0x0, ttl 64, id 15510, offset 0, flags [DF], proto: TCP (6), length: 84) kennedy1.aecom.yu.edu.7791 > kennedy2.aecom.yu.edu.55409: P 664:696(32) ack 9 win 1448 <nop,nop,timestamp 122941 102138667> 10:34:36.737095 IP (tos 0x0, ttl 64, id 7981, offset 0, flags [DF], proto: TCP (6), length: 52) kennedy1.aecom.yu.edu.55735 > kennedy2.aecom.yu.edu.7791: ., cksum 0xfa0c (correct), ack 74344 win 16652 <nop,nop,timestamp 122941 102138667> 10:34:36.737383 IP (tos 0x0, ttl 64, id 12149, offset 0, flags [DF], proto: TCP (6), length: 52) kennedy2.aecom.yu.edu.55409 > kennedy1.aecom.yu.edu.7791: ., cksum 0xc5e2 (correct), ack 696 win 15966 <nop,nop,timestamp 102138667 122941> 10:34:36.737716 IP (tos 0x0, ttl 64, id 15511, offset 0, flags [DF], proto: TCP (6), length: 68) kennedy1.aecom.yu.edu.7791 > kennedy2.aecom.yu.edu.55409: P 696:712(16) ack 9 win 1448 <nop,nop,timestamp 122941 102138667> 10:34:36.737930 IP (tos 0x0, ttl 64, id 42381, offset 0, flags [DF], proto: TCP (6), length: 1500) kennedy2.aecom.yu.edu.7791 > kennedy1.aecom.yu.edu.55735: . 74344:75792(1448) ack 1 win 16022 <nop,nop,timestamp 102138667 122941> 10:34:36.737953 IP (tos 0x0, ttl 64, id 42382, offset 0, flags [DF], proto: TCP (6), length: 1500) kennedy2.aecom.yu.edu.7791 > kennedy1.aecom.yu.edu.55735: . 75792:77240(1448) ack 1 win 16022 <nop,nop,timestamp 102138667 122941> 10:34:36.737973 IP (tos 0x0, ttl 64, id 42383, offset 0, flags [DF], proto: TCP (6), length: 1276) kennedy2.aecom.yu.edu.7791 > kennedy1.aecom.yu.edu.55735: P 77240:78464(1224) ack 1 win 16022 <nop,nop,timestamp 102138667 122941> 10:34:36.738076 IP (tos 0x0, ttl 64, id 12150, offset 0, flags [DF], proto: TCP (6), length: 52) kennedy2.aecom.yu.edu.55409 > kennedy1.aecom.yu.edu.7791: ., cksum 0xc5d2 (correct), ack 712 win 15966 <nop,nop,timestamp 102138667 122941> 10:34:36.738225 IP (tos 0x0, ttl 64, id 42384, offset 0, flags [DF], proto: TCP (6), length: 60) kennedy2.aecom.yu.edu.7791 > kennedy1.aecom.yu.edu.55735: P 78464:78472(8) ack 1 win 16022 <nop,nop,timestamp 102138667 122941> 10:34:36.738381 IP (tos 0x0, ttl 64, id 7982, offset 0, flags [DF], proto: TCP (6), length: 52) kennedy1.aecom.yu.edu.55735 > kennedy2.aecom.yu.edu.7791: ., cksum 0xf464 (correct), ack 75792 win 16652 <nop,nop,timestamp 122941 102138667> 10:34:36.738527 IP (tos 0x0, ttl 64, id 7983, offset 0, flags [DF], proto: TCP (6), length: 52) kennedy1.aecom.yu.edu.55735 > kennedy2.aecom.yu.edu.7791: ., cksum 0xeebc (correct), ack 77240 win 16652 <nop,nop,timestamp 122941 102138667> 10:34:36.738751 IP (tos 0x0, ttl 64, id 7984, offset 0, flags [DF], proto: TCP (6), length: 52) kennedy1.aecom.yu.edu.55735 > kennedy2.aecom.yu.edu.7791: ., cksum 0xe9f4 (correct), ack 78464 win 16652 <nop,nop,timestamp 122941 102138667> 10:34:36.738855 IP (tos 0x0, ttl 64, id 7985, offset 0, flags [DF], proto: TCP (6), length: 52) kennedy1.aecom.yu.edu.55735 > kennedy2.aecom.yu.edu.7791: ., cksum 0xe9ec (correct), ack 78472 win 16652 <nop,nop,timestamp 122941 102138667> 10:34:36.740591 IP (tos 0x0, ttl 64, id 15512, offset 0, flags [DF], proto: TCP (6), length: 84) kennedy1.aecom.yu.edu.7791 > kennedy2.aecom.yu.edu.55409: P 712:744(32) ack 9 win 1448 <nop,nop,timestamp 122942 102138667> 10:34:36.740827 IP (tos 0x0, ttl 64, id 12151, offset 0, flags [DF], proto: TCP (6), length: 52) kennedy2.aecom.yu.edu.55409 > kennedy1.aecom.yu.edu.7791: ., cksum 0xc5b0 (correct), ack 744 win 15966 <nop,nop,timestamp 102138668 122942> 10:34:36.746821 IP (tos 0x0, ttl 64, id 42385, offset 0, flags [DF], proto: TCP (6), length: 68) kennedy2.aecom.yu.edu.7791 > kennedy1.aecom.yu.edu.55735: P 78472:78488(16) ack 1 win 16022 <nop,nop,timestamp 102138669 122941> 10:34:36.746953 IP (tos 0x0, ttl 64, id 7986, offset 0, flags [DF], proto: TCP (6), length: 52) kennedy1.aecom.yu.edu.55735 > kennedy2.aecom.yu.edu.7791: ., cksum 0xe9d8 (correct), ack 78488 win 16652 <nop,nop,timestamp 122943 102138669> 10:34:36.747078 IP (tos 0x0, ttl 64, id 15513, offset 0, flags [DF], proto: TCP (6), length: 68) kennedy1.aecom.yu.edu.7791 > kennedy2.aecom.yu.edu.55409: P 744:760(16) ack 9 win 1448 <nop,nop,timestamp 122943 102138668> 10:34:36.747485 IP (tos 0x0, ttl 64, id 12152, offset 0, flags [DF], proto: TCP (6), length: 52) kennedy2.aecom.yu.edu.55409 > kennedy1.aecom.yu.edu.7791: ., cksum 0xc59e (correct), ack 760 win 15966 <nop,nop,timestamp 102138669 122943> 10:34:38.345473 IP (tos 0x0, ttl 64, id 3409, offset 0, flags [DF], proto: TCP (6), length: 60) kennedy1.aecom.yu.edu.7790 > kennedy2.aecom.yu.edu.54778: P 80:88(8) ack 81 win 1448 <nop,nop,timestamp 123343 102138319> 10:34:38.345820 IP (tos 0x0, ttl 64, id 52759, offset 0, flags [DF], proto: TCP (6), length: 60) kennedy2.aecom.yu.edu.54778 > kennedy1.aecom.yu.edu.7790: P 81:89(8) ack 88 win 1460 <nop,nop,timestamp 102139069 123343> 10:34:38.346138 IP (tos 0x0, ttl 64, id 3410, offset 0, flags [DF], proto: TCP (6), length: 52) kennedy1.aecom.yu.edu.7790 > kennedy2.aecom.yu.edu.54778: ., cksum 0x4397 (correct), ack 89 win 1448 <nop,nop,timestamp 123343 102139069> 10:34:41.345512 IP (tos 0x0, ttl 64, id 3411, offset 0, flags [DF], proto: TCP (6), length: 60) kennedy1.aecom.yu.edu.7790 > kennedy2.aecom.yu.edu.54778: P 88:96(8) ack 89 win 1448 <nop,nop,timestamp 124093 102139069> 10:34:41.345868 IP (tos 0x0, ttl 64, id 52760, offset 0, flags [DF], proto: TCP (6), length: 60) kennedy2.aecom.yu.edu.54778 > kennedy1.aecom.yu.edu.7790: P 89:97(8) ack 96 win 1460 <nop,nop,timestamp 102139819 124093> 10:34:41.346186 IP (tos 0x0, ttl 64, id 3412, offset 0, flags [DF], proto: TCP (6), length: 52) kennedy1.aecom.yu.edu.7790 > kennedy2.aecom.yu.edu.54778: ., cksum 0x3dab (correct), ack 97 win 1448 <nop,nop,timestamp 124093 102139819> 10:34:44.345662 IP (tos 0x0, ttl 64, id 3413, offset 0, flags [DF], proto: TCP (6), length: 60) kennedy1.aecom.yu.edu.7790 > kennedy2.aecom.yu.edu.54778: P 96:104(8) ack 97 win 1448 <nop,nop,timestamp 124843 102139819> 10:34:44.346017 IP (tos 0x0, ttl 64, id 52761, offset 0, flags [DF], proto: TCP (6), length: 60) kennedy2.aecom.yu.edu.54778 > kennedy1.aecom.yu.edu.7790: P 97:105(8) ack 104 win 1460 <nop,nop,timestamp 102140569 124843> 10:34:44.346340 IP (tos 0x0, ttl 64, id 3414, offset 0, flags [DF], proto: TCP (6), length: 52) kennedy1.aecom.yu.edu.7790 > kennedy2.aecom.yu.edu.54778: ., cksum 0x37bf (correct), ack 105 win 1448 <nop,nop,timestamp 124843 102140569> -- Maurice Volaski, mvolaski at aecom.yu.edu Computing Support, Rose F. Kennedy Center Albert Einstein College of Medicine of Yeshiva University