RE: Exchange Server Redundancy

  • From: "Mulnick, Al" <Al.Mulnick@xxxxxxxxxx>
  • To: "'[ExchangeList]'" <exchangelist@xxxxxxxxxxxxx>
  • Date: Tue, 9 Mar 2004 08:51:19 -0500

So, really, it's not much different than the MCS solution from Microsoft
except that a) it's replicating data on the bit level? and b) it's software
vs. hardware solution?  I'm missing where it saves the time?  It has to
ensure that the database is consistent right?  Or does it?


From: Tiago de Aviz [mailto:Tiago@xxxxxxxxxxxxxxx] 
Sent: Monday, March 08, 2004 6:06 PM
To: [ExchangeList]
Subject: [exchangelist] RE: Exchange Server Redundancy

Sure, i'm using it right now. I also have many customers using it for
replication of SQL Server databases, Oracle databases, IIS web servers, file
servers... It's an outstanding product. It's based on the ARCserve
technology, but it basically does replication tasks from one server to the
another in real-time, and runs scripts that are built-in in the application
in the case of a failure.


It requires a special communication link between the two server (get
yourself two nics and a crossover cable), and it detects failures when the
service on the two machines can't talk to each other anymore. When it
detects this failure, it starts pinging addresses that you specify to ensure
it is online, or it can verify if the primary server is still alive via the
COM port. 


Primary server dead? It starts the Brightstor service, and the secondary
server starts answering as the primary, and noone notices what happened.


Well, it can scale to as much users as you want, it basically depends on
your hardware. All it does is database replication, Al. It doesn't know how
many users you have when it's replicating. It's just replicating the .edb
file and that's it. When the primary server crashes, it'll bring the
exchange server up. We always recommend having the same hardware on the
primary and secondary servers, to simplify things. But yes, you can have
totally different machines for this service.


Tiago de Aviz


(41) 340-2363 <> 


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From: Mulnick, Al [mailto:Al.Mulnick@xxxxxxxxxx] 
Sent: segunda-feira, 8 de março de 2004 19:53
To: [ExchangeList]
Subject: [exchangelist] RE: Exchange Server Redundancy

Tiago, is that something that you use and have seen?  How many users does
that scale to?  



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