[Fedora-directory-users] Replication: How long does it take until replicated servers are in sync after one of them came up....

[Reinhard Nappert]

Hi, 

Consider the following scenario:
You have a replicated environment, let's say a MMR setup. Now, one of
the masters (M2) is down for a period of time and updates were performed
against the other master (M1). How long does it take until both boxes
are in sync, after M2 is back online. I assume that M1 tries to update
M2 throughout the downtime in an interval setting. If this is right,
what is this interval and secondly, can this be configured.

Thanks,
-Reinhard

[Rich Megginson]

Reinhard Nappert wrote:
>  Hi,
>
>  Consider the following scenario:
>  You have a replicated environment, let's say a MMR setup. Now, one of 
>  the masters (M2) is down for a period of time and updates were 
>  performed against the other master (M1). How long does it take until 
>  both boxes are in sync, after M2 is back online. I assume that M1 
>  tries to update M2 throughout the downtime in an interval setting. If 
>  this is right, what is this interval and secondly, can this be configured.
>  
The interval uses a backoff strategy - it first tries after 1 second, 
then after 2 seconds, then after 4 seconds, etc. doubling every time 
until it hits a maximum of every 5 minutes.  This is not configurable, 
but there is a way to send updates now which will break it out of the 
wait/backoff.
>  Thanks,
>  -Reinhard
>
>  ------------------------------------------------------------------------
>
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>  Fedora-directory-users(a)redhat.com
>  https://www.redhat.com/mailman/listinfo/fedora-directory-users
>

[Reinhard Nappert]

Yes,

I know that you can set nsds5ReplicaUpdateSchedule to "0000-2359
0123456", which forces the update, but this would mean that I know that
the other box was down.

Is there are different way to do it?

Thanks,
-Reinhard



-----Original Message-----
From: fedora-directory-users-bounces(a)redhat.com
[mailto:[e-mail]] On Behalf Of Rich
Megginson
Sent: Monday, February 09, 2009 3:52 PM
To: General discussion list for the Fedora Directory server project.
Subject: Re: [Fedora-directory-users] Replication: How long does it take
untilreplicated servers are in sync after one of them came up....

Reinhard Nappert wrote:
>  Hi,
>
>  Consider the following scenario:
>  You have a replicated environment, let's say a MMR setup. Now, one of 
>  the masters (M2) is down for a period of time and updates were 
>  performed against the other master (M1). How long does it take until 
>  both boxes are in sync, after M2 is back online. I assume that M1 
>  tries to update M2 throughout the downtime in an interval setting. If 
>  this is right, what is this interval and secondly, can this be 
configured.
>  
The interval uses a backoff strategy - it first tries after 1
second,
then after 2 seconds, then after 4 seconds, etc. doubling every time
until it hits a maximum of every 5 minutes.  This is not configurable,
but there is a way to send updates now which will break it out of the
wait/backoff.
>  
> Thanks,
> -Reinhard
>  
>
----------------------------------------------------------------------
> --
>  
> --
> Fedora-directory-users mailing list
> Fedora-directory-users(a)redhat.com
> https://www.redhat.com/mailman/listinfo/fedora-directory-users
>

[Rich Megginson]

Reinhard Nappert wrote:
>  Yes,
>
>  I know that you can set nsds5ReplicaUpdateSchedule to "0000-2359
>  0123456", which forces the update, but this would mean that I know that
>  the other box was down.
>
>  Is there are different way to do it?
>     
No.  You would have to have some external agent notice the machine was 
up and tell replication to begin immediate updates.
>  Thanks,
>  -Reinhard
>
>
>
>  -----Original Message-----
>  From: fedora-directory-users-bounces(a)redhat.com
>  [mailto:[e-mail]] On Behalf Of Rich
>  Megginson
>  Sent: Monday, February 09, 2009 3:52 PM
>  To: General discussion list for the Fedora Directory server project.
>  Subject: Re: [Fedora-directory-users] Replication: How long does it take
>  untilreplicated servers are in sync after one of them came up....
>
>  Reinhard Nappert wrote:
>    
> > Hi,
> >
> > Consider the following scenario:
> > You have a replicated environment, let's say a MMR setup. Now, one of 
> > the masters (M2) is down for a period of time and updates were 
> > performed against the other master (M1). How long does it take until 
> > both boxes are in sync, after M2 is back online. I assume that M1 
> > tries to update M2 throughout the downtime in an interval setting. If 
> > this is right, what is this interval and secondly, can this be
> >     
>  configured.
>    
>  The interval uses a backoff strategy - it first tries after 1 second,
>  then after 2 seconds, then after 4 seconds, etc. doubling every time
>  until it hits a maximum of every 5 minutes.  This is not configurable,
>  but there is a way to send updates now which will break it out of the
>  wait/backoff.
>    
> > Thanks,
> > -Reinhard
> >
> > ----------------------------------------------------------------------
> > --
> >
> > --
> > Fedora-directory-users mailing list
> > Fedora-directory-users(a)redhat.com
> > https://www.redhat.com/mailman/listinfo/fedora-directory-users
> >   
> >     
>
>
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>  https://www.redhat.com/mailman/listinfo/fedora-directory-users
>