Solved

Exchange redundancy

Posted on 2001-08-29
7
495 Views
Last Modified: 2012-08-14
I have exchange 5.5 running, and I want to create redundancy incase the server crashes.   What is the recommended way to create redundancy for Exchange 5.5.  I heard from someone that I should put exchange 5.5 on 2 servers and then balance mailboxes between the two and move mailboxes when one crashes.  Is this the best way for someone one Exchange 5.5 and NT 4.0?

thanks
0
Comment
Question by:ptran2000
7 Comments
 
LVL 1

Expert Comment

by:robinsonbpc
ID: 6436982
It depends on your budget and whether you are looking for uptime, data backup or a combination.  The overall idea would be to eliminate any Single Point Of Failure (SPOF's).  The best way but probably the most expensive is to cluster your server.  If you split mailboxes between 2 servers then you really don't have redundancy what you have is reduced the number of users affected when a server crashes.  But when that server crashes you still have to recover data from it and restore user mailboxes.
0
 
LVL 4

Expert Comment

by:darrenburke
ID: 6438177
Exchange 5.5 clustering is not great.  It works in an Active/Passive mode which means that the second server in only used when the first crashes.  You should maybe consider moving to Exchange 2000 as this support Active/Active clustering.  This means that all you hardware and investments are always utilized.  Connections are split between the two but with automatic failover if one fails.

0
 

Author Comment

by:ptran2000
ID: 6438339
robinsonbpc, the redundancy is mainly for uptime,  if for some reason the primary Exchange server crashes, then I want the other server to kick in (failover support).  My company is very dependent on email, so I want to have something up in about 1-2 hours if the primary Exchange server crashes.

Darren,  Active/Passive is fine with me as long as the Passive Exchange server can kick in within an hour or so.  I have no experience with clustering servers, do you need enterprise version of NT for this or just the standard version on NT server?  

thanks
0
Free book by J.Peter Bruzzese, Microsoft MVP

Are you using Office 365? Trying to set up email signatures but you’re struggling with transport rules and connectors? Let renowned Microsoft MVP J.Peter Bruzzese show you how in this exclusive e-book on Office 365 email signatures. Better yet, it’s free!

 
LVL 3

Expert Comment

by:Beluga
ID: 6439876
Exchange 5.5 on NT clusters can be a pain. Plus, there seem to be precious few consultants and support people who know NT clustering. When you have cluster questions, you can't always get answers.

If you need high-availability (ie. "always-on"), I would suggest looking at Exchange 2000 and Windows 2000. Alternatively (particularly if you don't want to upgrade) you could look at standby servers and 3rd party clustering options. Here are two examples - I can't vouch for their compatibility with Exchange, but they're worth a look:

Legato Co-Standby Server:
http://www.vinca.com/products/availability/costandbyserver/

NSI DoubleTake:
http://www.nsisw.com/main/pages/Products/DTspec.html

0
 
LVL 1

Accepted Solution

by:
robinsonbpc earned 50 total points
ID: 6440157
To answer your question about 5.5 and clustering: Exchange 5.5 and NT 4 in a clustered environment requires the Enterprise edition of NT.  In this configuration the passive node can take over operation within minutes if not quicker depending on how you set it up.

Again as I mentioned originally you will have to weigh your needs against your budget.  Typically it is better to have the latest software out (Exch 2k, Win 2k) as mentioned above however this is another cost you incur.  Exch 2k on Win 2k does handle clustering better than Exch 5.5 on NT 4.

Another idea that gives a good trade off between cost & redundancy is to invest in a good server and ensure you have a proven backup/restore plan.  In this method you would put your redundancy in your server.  Ensure it has multiple power supplies, a hardware RAID controller, a RAID array on quality high speed disks, etc.  With as much of this as possible being hot swappable.
0
 
LVL 44

Expert Comment

by:bruintje
ID: 7270516
Hello ptran2000

this question is open for more then 2 months
time to clean up
if not stated otherwise

my recom will be
-PAQ
-points to robinsonbpc
-this will be finalized by an EE Moderator
-with no further update (15.09.2002)

PLEASE DO NOT ACCEPT THIS COMMENT AS ANSWER

HAGD:O)Bruintje
posted by ToolzEE v1.0
0
 

Expert Comment

by:Jgould
ID: 7297244
Question has been closed as per recommendation

JGould-EE Moderator
0

Featured Post

PRTG Network Monitor: Intuitive Network Monitoring

Network Monitoring is essential to ensure that computer systems and network devices are running. Use PRTG to monitor LANs, servers, websites, applications and devices, bandwidth, virtual environments, remote systems, IoT, and many more. PRTG is easy to set up & use.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

ADCs have gained traction within the last decade, largely due to increased demand for legacy load balancing appliances to handle more advanced application delivery requirements and improve application performance.
This article aims to explain the working of CircularLogArchiver. This tool was designed to solve the buildup of log file in cases where systems do not support circular logging or where circular logging is not enabled
To show how to generate a certificate request in Exchange 2013. We show this process by using the Exchange Admin Center. Log into Exchange Admin Center.:  First we need to log into the Exchange Admin Center. Navigate to the Servers >> Certificates…
In this Micro Video tutorial you will learn the basics about Database Availability Groups and How to configure one using a live Exchange Server Environment. The video tutorial explains the basics of the Exchange server Database Availability grou…

867 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

16 Experts available now in Live!

Get 1:1 Help Now