Re: Cross country networks, and data replication... Questions... :-)

[Jared Mauch <jared () puck Nether net>]

On Thu, Jan 16, 2003 at 03:45:30PM -0800, Gabriel wrote:
> Hello all.
>
> --- Where we are ---
>
> Currently, I've got a single site, colocated on the East Coast. 
> Currently, I've got two NetApps at that site, one serving as a 
> mailspool, the other serving as a location for web documents.  This 
> system works via NFS to a fair number of mail and web servers, and it's 
> running happily.
>
> --- Where I'm going ---
>
> What I seek is some help on implementing a second site, and the link 
> between the two.  The sites will be more or less the same in terms of 
> the equipment in them, or so I hope.
>
> I want to be able to have the changes made at one site replicated to the 
> other site transparently.  That is, if I update a file at site A, I want 
> to be able to see the changes at Site B in a reasonable period of time 
> (i.e., short), and without having to manually move data around.   I 
> specifically want to do this for allow both sites to offer the same 
> mailspool, so that customers can check their mail at either site.
>
> I am in the planning phase of bringing up a second site, and at this
> site, there will be more web servers, and more mail servers.  There will
> also be an additional netapp for each of mail and www.
>
> Between the pair of mail netapps (and to a lesser degree, the www
> netapps), I want them to replicate changes to the other one.  That is,
> if a file is removed on Mail.NetApp A, it should also disappear on
> Mail.NetApp B.  And if a file is created on netapp B, it should also
> come into existance on netapp A.  Bidirectional updates.
>
> My current setup consists of Linux and FreeBSD systems, and F740 NetApps.
>
> And yes, there is a lot of pressure to stay with the NetApps.
>
> Any hints, or advice will be much appreciated.

        You probally want something like snapmirror, but when a file is
changed/deleted in the mailbox, you hack your pop/imap server to delete
the file on the 'master' fileserver.

        this isn't really on-topic though, imho.

        - jared


-- 
Jared Mauch  | pgp key available via finger from jared () puck nether net
clue++;      | http://puck.nether.net/~jared/  My statements are only mine.