Adding a 2.3.x replica [Documentation Bug]

[Simpson, John R]

> -----Original Message-----
> From: info-cyrus-bounces+john_simpson=reyrey.com at lists.andrew.cmu.edu [mailto:info-
> cyrus-bounces+john_simpson=reyrey.com at lists.andrew.cmu.edu] On Behalf Of Michael
> Menge
> Sent: Tuesday, February 15, 2011 7:29 AM
> To: awilliam at whitemice.org
> Cc: cyrus-users
> Subject: Re: Adding a 2.3.x replica [Documentation Bug]
> 
> Quoting Adam Tauno Williams <awilliam at whitemice.org>:
> 
> > On Mon, 2011-02-14 at 16:37 -0500, Adam Tauno Williams wrote:
> >> Looking at
> >> <http://www.cyrusimap.org/docs/cyrus-imapd/2.3.16/install-replication.php>
> >
> > Documentation Bug:
> >
> > "Add a line similar to the following in the STARTUP section of
> > cyrus.conf"
> >
> > There is no "STARTUP" section, it is the "START" section.
> >
> > START {
> >   # do not delete this entry!
> >   recover       cmd="ctl_cyrusdb -r"
> >   # this is only necessary if using idled for IMAP IDLE
> >   idled         cmd="idled"
> >   # Start the replication client (this is the master)
> >   syncclient       cmd="sync_client -r"
> > }
> >
> 
> If this method is used the master will wait till the syncclient can
> reach the replica. This can cause unnessesary delays it the replica
> is not running or can't be reached.
> 
> 

You can avoid the delays with "sync_client -r -o" (-o == try once
and exit).  You'll need an external method to make sure that 
sync_client is running and to process any abandoned replication 
logs in configdirectory/sync (usually /var/lib/imap/sync).  You 
should be able to find an old version of Brom's monitorsync.pl for
inspiration.

John

> 
> >> Reading the quote -
> >> "Rolling" replication means that the "master" server continuously
> >> synchonizes itself with the replica.
> >> - I take this to mean that the master continuously *pushes* changes to
> >> the replica [secondary]?
> >
> > Yep.
> >
> >> Is there a recommended/suggested value for sync_repeat_interval other
> >> than the default of "1"?
> >
> > ?
> 
> >> Is there a recommended Method for bringing up a new replica for an
> >> active master (with 1.4 million messages in its mailstore)
> >
> 
> If the replica is running, you have to run the following command
> to initialise the replica:
> 
> sync_client -u -f userlist.txt
> 
> userlist.txt is a file containing all users.
> This can be done while the master and rolling replication
> is running.
> 
> 
> 
> 
> --------------------------------------------------------------------------------
> M.Menge                                Tel.: (49) 7071/29-70316
> Universität Tübingen                   Fax.: (49) 7071/29-5912
> Zentrum für Datenverarbeitung          mail:
> michael.menge at zdv.uni-tuebingen.de
> Wächterstraße 76
> 72074 Tübingen



John Simpson 
Senior Software Engineer, I. T. Engineering and Operations

Reynolds and Reynolds 
One Reynolds Way | Kettering, Ohio 45430 
office 937.485.8304 
John_Simpson at reyrey.com 

MAKING BUSINESS BETTER. 

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