[DRBD-user] State 'stalled'

Lars Ellenberg lars.ellenberg at linbit.com
Tue May 15 15:05:06 CEST 2007

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.

On Tue, May 15, 2007 at 01:46:44PM +0100, Ben Clewett wrote:
> Lars,
> Lars Ellenberg wrote:
> >On Tue, May 15, 2007 at 12:37:54PM +0100, Ben Clewett wrote:
> >>The kernel is (SUSE)
> >>
> >>I don't know what sort of io subsystem.  I have 2x 10MBit/s NICs, one 
> >>dedicated for DRBD.  In order to test I have throttled the bandwidth at 
> >>some value way larger than the speed of the card.
> >
> >so you have not throttled it, but you request a much higher sync rate
> >than your hardware can handle. don't do that.
> There is good reason.  Our production servers will be linked by fibre. 
> On error, like physical damage to a fibre or terminator, these have a 
> habit of jumping down the Ethernet protocol a couple of stops.  So a 
> 1000baseF might become a 10baseF.  The upshot is that I need to test 
> with this sync rate set much higher than my NIC's.
> I have now given this a value 1/10 of the ability of the NIC.  But this 
> has not helped.  Under protocol B they still jump to 'stalled' when I 
> write data under a resync operation.

well. then use protocol C for now.

if we could reproduce the behaviour you describe here,
we can debug and fix it. but so far, it did not occur.

: Lars Ellenberg                            Tel +43-1-8178292-0  :
: LINBIT Information Technologies GmbH      Fax +43-1-8178292-82 :
: Vivenotgasse 48, A-1120 Vienna/Europe    http://www.linbit.com :
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