[DRBD-user] Drbd : PingAsk timeout, about 10 mins.

simon litao5 at hisense.com
Tue Aug 21 09:40:34 CEST 2012

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Hi Pascal,


I can’t reproduce the error because the condition that it issues is very especially.  The Master host is in the   “not real dead” status. ( I doubt it is Linux’s panic). The TCP stack maybe is bad in Master host. Now I don’t want to avoid it because I can’t reproduce it. I only want to succeed to  switch form Master to Slave so that my service can be supplied normally. But I can’t right to switch because of the 10 minutes delay  of Drbd.


I run “drbdsetup 0 show” on my host, it shows as following,


disk {

        size                    0s _is_default; # bytes

        on-io-error             detach;

        fencing                 dont-care _is_default;

        max-bio-bvecs           0 _is_default;


net {

        timeout                 60 _is_default; # 1/10 seconds

        max-epoch-size          2048 _is_default;

        max-buffers             2048 _is_default;

        unplug-watermark        128 _is_default;

        connect-int             10 _is_default; # seconds

        ping-int                10 _is_default; # seconds

        sndbuf-size             0 _is_default; # bytes

        rcvbuf-size             0 _is_default; # bytes

        ko-count                0 _is_default;


        after-sb-0pri           discard-least-changes;

        after-sb-1pri           discard-secondary;

        after-sb-2pri           disconnect _is_default;

        rr-conflict             disconnect _is_default;

        ping-timeout            5 _is_default; # 1/10 seconds


syncer {

        rate                    102400k; # bytes/second

        after                   -1 _is_default;

        al-extents              257;


protocol C;

_this_host {

        device                  minor 0;

        disk                    "/dev/cciss/c0d0p7";

        meta-disk               internal;

        address                 ipv4;


_remote_host {

        address                 ipv4;




In the list ,  there is  “timeout                 60 _is_default; # 1/10 seconds”.







发件人: Pascal BERTON [mailto:pascal.berton3 at free.fr] 
发送时间: 2012年8月21日 星期二 4:58
收件人: 'simon'; drbd-user at lists.linbit.com
主题: RE: [DRBD-user] Drbd : PingAsk timeout, about 10 mins.


Hi Simon !


Sorry for the delay, return day to work, busy day...

Eeh yup, if the former master is down, that’s effectively a fairly good reason for having a down replication network… J Just to better understand your specific context, could you please let me know what “cat /proc/drbd” does report, especially during this blackout period of 10 minutes if you may reproduce it, and also “drbdsetup 0 show” and “crm configure show”, just to have the big picture of your configuration.






De : simon [mailto:litao5 at hisense.com] 
Envoyé : lundi 20 août 2012 03:05
À : 'Pascal BERTON'; drbd-user at lists.linbit.com
Objet : RE: [DRBD-user] Drbd : PingAsk timeout, about 10 mins.


Hi Pasical,


Thanks your reply. 


Yes, the network was bad.  Master host was dead so that Slave host took over its work and mount the drbd partition on Slave host. When mounting , the timeout issued.  But the default timeout of network of drdb is 6 senconds (it can be set in drbd.conf).  But it failed to take effect.  why?


Do you have a good idea to make it switch from Master to Slave immediately in the network anomaly?  






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