Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
On my previous setup: kernel 2.4.25 and drbd 0.6.12 initial sync speed
was rather high: about 95Mb/sec on a GigE link and hardware raid0
below. I had sync-max=128M sync-min=32M.
Now I set up 2.6.5 kernel with today's CVS drbd 0.7 (on the same
hardware), and initial sync speed looks really strange. It started at
32Mb/sec and gradually slows down to a complete halt:
0: cs:SyncTarget st:Secondary/Primary ld:Inconsistent
ns:0 nr:3223924 dw:3223924 dr:0 al:0 bm:418 lo:0 pe:2019 ua:0
[=>..................] sync'ed: 5.2% (57646/60794)M
finish: 137:25:58 speed: 119 (3,195) K/sec
Here I have
syncer {
rate = 128M
al-extents = 257
}
CPU usage and iowait are near zero. This is 'ps' ouput on the primary:
# ps axl|grep drbd
1 0 134 1 15 0 0 0 drbd_get_ee DW ? 0:11 [drbd0_receiver]
1 0 540 1 15 0 0 0 schedule_timeout SW ? 0:06 [drbd0_asender]
1 0 541 1 15 0 0 0 __down_interruptible SW ? 0:09 [drbd0_worker]
4 0 595 200 16 0 1484 460 pipe_wait S pts/0 0:00 grep drbd
ans this is on the secondary:
# ps axl|grep drbd
1 0 133 1 15 0 0 0 schedule_timeout SW ? 0:20 [drbd0_receiver]
1 0 137 1 15 0 0 0 schedule_timeout SW ? 0:08 [drbd0_asender]
1 0 138 1 15 0 0 0 __down_interruptible SW ? 0:01 [drbd0_worker]
4 0 235 205 15 0 1488 464 pipe_wait S pts/0 0:00 grep drbd
I tried "drbdadm disconnect all" on the primary; secondary turned to
StandAlone, but on primary I get:
# drbdadm disconnect all
Child process does not terminate!
Exiting.
# ps axl|grep drbd
1 0 134 1 15 0 0 0 drbd_get_ee DW ? 0:11 [drbd0_receiver]
4 0 601 1 15 0 1360 264 __down D pts/0 0:00 /sbin/drbdsetup /dev/nb0 disconnect
4 0 603 200 15 0 1488 464 pipe_wait S pts/0 0:00 grep drbd
# cat /proc/drbd
version: 0.7-pre6 (api:72/proto:72)
0: cs:SyncSource st:Primary/Secondary ld:Consistent
ns:3223956 nr:0 dw:0 dr:3223924 al:0 bm:620 lo:0 pe:0 ua:0
[=>..................] sync'ed: 5.2% (57646/60794)M
finish: 235:27:36 speed: 69 (2,007) K/sec
Any thoughts/suggestions?
Eugene
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