Re: [Pacemaker] time synchronisation

2012-12-19 Thread Nikita Michalko
Am Mittwoch, 19. Dezember 2012 13:28:40 schrieb Lars Marowsky-Bree: > On 2012-12-19T13:22:54, Nikita Michalko wrote: > > > They should all read Lamport ;-) > > > > Interesting - what/who is Lamport though? > > LMGTFY: > http://en.wikipedia.org/wiki/Lamport_timestamps#Lamport.27s_logical_clock_i

Re: [Pacemaker] time synchronisation

2012-12-19 Thread Lars Marowsky-Bree
On 2012-12-19T13:22:54, Nikita Michalko wrote: > > They should all read Lamport ;-) > Interesting - what/who is Lamport though? LMGTFY: http://en.wikipedia.org/wiki/Lamport_timestamps#Lamport.27s_logical_clock_in_distributed_systems -- Architect Storage/HA SUSE LINUX Products GmbH, GF: Jeff

Re: [Pacemaker] time synchronisation

2012-12-19 Thread Nikita Michalko
Hi Lars! | v Am Mittwoch, 19. Dezember 2012 13:06:25 schrieb Lars Marowsky-Bree: > On 2012-12-19T10:06:25, James Harper wrote: > > What is the behaviour of a cluster when the nodes are up to 10 minutes > > out of sync with each other, because they've just been booted up after > > a crash and th

Re: [Pacemaker] time synchronisation

2012-12-19 Thread Lars Marowsky-Bree
On 2012-12-19T10:06:25, James Harper wrote: > What is the behaviour of a cluster when the nodes are up to 10 minutes > out of sync with each other, because they've just been booted up after > a crash and the hwclocks are out of date and there is no ntp time > source reachable? Could it cause lots

Re: [Pacemaker] time synchronisation

2012-12-19 Thread David Coulson
On 12/19/12 5:06 AM, James Harper wrote: What is the best way on bootup in the above situation to ensure time synchronisation? Is it as simple as having a cron job to reset the hardware clock every so often so that on reboot things are reasonable? At least RHEL and SuSE can do an explicit ntp

Re: [Pacemaker] time synchronisation

2012-12-19 Thread James Harper
> > What is the behaviour of a cluster when the nodes are up to 10 minutes out > of sync with each other, because they've just been booted up after a crash > and the hwclocks are out of date and there is no ntp time source reachable? > Could it cause lots of sig11's and constant re-elections becau