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 High Availability (2005)
 Cluster Queries

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sachinsamuel
Constraint Violating Yak Guru

383 Posts

Posted - 2007-10-26 : 01:37:45
Hi All,

I am deciding on high-availibitly for my database server box. My website can get large number of user hits for 4 days in every quater of year. We are also planning to launch some schemes which will help keep are business and servers busy :).

I am planning to have 2 node cluster. With configuration

Windows Server 2003 Standard Edition 64 bit
SQL Server 2005 Standard Edition 64 bit
4 GB RAM

8 x 300 GB Ultra 320 SCSI Hard Drives
Hardware RAID 0+1
Redundant Controllers
Fiber Attached

My Question are.

1) What type of clustering I should go for? (Active/active vs Active/Clustering) and why?

2) Will active/active means load balancing as there will be 2 servers as active and both of them can share the load?

3) What are the advantages and disadvantages of clustering type you recommend in question 1.

4) We are also planning to configure transactional replication on these servers as per disaster recovery plan.
Will it an overhead to the servers if they are in different geographical locations? (My network bandwidth is
100 mbps connection)

Please help. Thanks in advance.

regards

S


Don't sit back because of failure. It will come back to check if you still available. -- Binu

tkizer
Almighty SQL Goddess

38200 Posts

Posted - 2007-10-26 : 11:32:44
1. Depends on how many instances you will have, how many licenses you purchased, and can a single node support the instances.
2. Clustering does not give you load balancing.
3. You seem to be confused about clustering, so we need to get your understanding correct before we answer this.
4. Clustering is recommended across a LAN not a WAN. If you do clustering across a WAN, then you'll need to purchase some very, very expensive hardware to do the SAN mirroring. We're talking in the 7 figures.

Tara Kizer
Microsoft MVP for Windows Server System - SQL Server
http://weblogs.sqlteam.com/tarad/
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rmiao
Master Smack Fu Yak Hacker

7266 Posts

Posted - 2007-10-27 : 01:24:53
>> 4) We are also planning to configure transactional replication on these servers as per disaster recovery plan.
Will it an overhead to the servers if they are in different geographical locations? (My network bandwidth is
100 mbps connection)

Depend son transaction rate on source server, heavier traffic means longer latency.
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