On Wed, 9 Mar 2011 21:46:09 +0100, Lars Ellenberg wrote:
> On Wed, Mar 09, 2011 at 10:49:08AM -0500, William Seligman wrote:
>> > On 3/4/11 4:58 PM, William Seligman wrote:
>>> > > On 3/4/11 12:38 PM, William Seligman wrote:
>>>> > >> I've RTFM'ed and google'd on this problem. Now I ask the experts.
>> >
>> > I just did a little archeology. I haven't always experienced these regular
>> > DRBD
>> > sync error messages. They began when I made two changes to my
>> > configuration file:
>> >
>> > - I switched from "Protocol C" to "Protocol A".
>> > - I added "net { ping-timeout 100; }"
>> >
>> > Are either of these changes likely to cause problems?
>> >
>> > My next step would normally be to reverse those changes, but these are
>> > production systems and it's hard for me to perform tests.
> d'oh.
> :-)
>
> you set ping-timeout to 10 seconds,
> (Why would you do that? That does not make sense...)It make perfect sense if you assume I'm a doofus, I'm a cosmologist, or I'm a physicist (at least one of these is true, perhaps more). The drbd.conf man page clearly states that the units of ping-timeout are tenths of a second, but somehow I read that as centiseconds. Hence the error of an order of magnitude. > which happens to be the default for ping-int[erval]. > There is some code branch in the module code that relies on > these two timeouts to be different. We will fix that. > > Meanwhile, just reduce ping-timeout to something sane, > or set ping-int to 11 [actually anything != (ping-timeout/10) should do], > and do a > drbdadm disconnect all; drbdadm connect all; > That should do the trick, > and can safely be done during production in you case, > as you have frequent disconnects anyways. I used "drbdadm adjust all" instead, which I (perhaps in error) thought was safer. It worked, and the error messages have stopped. Please elevate Lars Ellenberg's status to that of hero. -- Bill Seligman | Phone: (914) 591-2823 Nevis Labs, Columbia Univ | mailto://[email protected] PO Box 137 | Irvington NY 10533 USA | http://www.nevis.columbia.edu/~seligman/
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