Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
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://seligman@nevis.columbia.edu
PO Box 137 |
Irvington NY 10533 USA | http://www.nevis.columbia.edu/~seligman/
-------------- next part --------------
A non-text attachment was scrubbed...
Name: smime.p7s
Type: application/pkcs7-signature
Size: 5894 bytes
Desc: S/MIME Cryptographic Signature
URL: <http://lists.linbit.com/pipermail/drbd-user/attachments/20110309/3dfc0d05/attachment.bin>