>Server 1, running IMAIL ( C:\IMAIL ), all domains in External DB, all IMAIL
>services running.
>
>Server 2, with IMAIL, with same directory ( C:\IMAIL ) as Server 1. All
>IMAIL services stopped.
>
>Server 3, MS SQL Server, having all domains tables from 1.
>
>Server 4, MS SQL Server, replicated from Server 3.
>
>Situation:
>All subdir under Server 1 ( IMAIL ), is replicated to Server 2 ( IMAIL )
>from time to time.
This isn't enough to tell server2 about the users on server 1. Even
with an external database, Imail keeps an internal list of domains +
users. Why? So that it can quickly verify incoming mail as acceptable
WITHOUT having to do an external database access to see if the user exists.
>All IMAIL Databases in Server 3 are replicated to Server 4 ( By SQL
>itself ).
>
>CRASH!!! Server 1 died.
>a. Starting all mail serviced in 2.
>b. Changing MX records from MX 1 to MX 2.
>c. Is everyone happy ?
>
>CRASH !!!! Server 3 died.
>a. Point DSN to Server 4.
>b. Is everyone happy ?
>
>What do you think ? Is this config reliable ? Is failover ( with human
>'touch' )
>I mean......should work ???
No, because server 2 doesn't know about the domains and users defined
on server 1. Server 2 looking in the external database is not
sufficient to discover the domains and users of server 1.
You must also create/delete all the domains and users of 1 also on
server 2. Then it may have a chance of working. However, keeping
server1 and server2 in perfect or even workable sync will be
impossible "human touchly" so you've got some serious programming and
testing to do before you can sleep soundly.
Len
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