Basic Clustering And Failovers
Apr 25, 2007
I'm thinking of setting up clustering and have a basic failover question that I can't seem to find and an answer.
I want to setup two sql 2005 std ed servers and have them clustered. When the servers are running are they both taking requests (load balanced) or is only one server taking requests and the other being updated, waiting for the first server to fail. If this is true, if/when the first server fails does the second one step up automatically?
I couldn't find any resources that answered these seemingly beginner questions. I'm more than happy to read so if you know of any articles/books I'd appreciate that as well.
thanks in advance,
Scott
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Oct 18, 2004
Im studying sql server clustering at the moment and have come across many points which confuses me. Can any SQL Clustering Guru clarify some of them for me or point me in the right direction. thanks.
1) Single Instance clustering now replaces Active/Passive clustering? If so, doesn't this mean the you cant run an 'Active/Active Cluster' by installing 2 instances of sql server on each node?
2) Multiple Instance clustering now replaces Active/Active clustering?
3) You can only have 1 instance of SQLSERVER on each node in a single instance cluster (2 nodes). However u have more than 1 sqlserver in a multiple instance cluster?
And last but not least, do u know where i can get the latest resources on sql server clustering? apart from microsoft.com. thanks.
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Nov 28, 2006
So is there something I'm supposed to configure to allow activation to fire after a cluster failover. We have had three where I have noticed that activation does not automatically fire back up. i have to alter the queue to get it going. None of the values on sys.service_queues imply that is disabled, but messages just keep stacking up into the queue and are not being dealt with. Once I alter the queue to turn activation on; everything takes off and starts working normaly.
Obviously, this is less than desireable for an environment that requires High availability.
Regards
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Mar 22, 2007
We have a number of databases in our company and we recently had to buy a second SQL server. What I would like to do is have both SQL Servers act as failovers for each other. They both are the exact same hardware configuration (dell blades poweredge 1855) and we have a RAID array with Melio clustered file system for our web servers. I haven€™t found any documentation on if this is even possible. Am I completely wrong in thinking this can be done or is there a better solution to spread the load but provide failover support with out buying 2 new machines?
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Jan 29, 2004
I've been asked to write a script to monitor whether a clustered server is up and alive and if so which node it's actually running on. Apparently there's been some problems of failover to the passive server without anyone knowing that it happened and they want to know. Any suggestions?
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Nov 13, 2007
We have 2 env. : Testing and Production, both are running Windows 2003 Enterprise Server with SQL Server 2005. The difference is Testing is NOT running Windows cluster but Production do so, what is the best way to transfer a database from testing to production?
We have another systems that both testing and production are running on NON-cluster and we use backup/restore to transfer the database, can it apply in this case.
And I found that there are a tools called DTC, which can transfer all DB objects from one DB to another, is it a best way to transfer between non-cluster and cluster env.?
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Dec 4, 2000
What is clustering?Why is it done?
Any suggestion appreciated.
Cheers!
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Sep 14, 1999
I need to cluster two NT Enterrpise Servers with SQL 7 running on them. I have been looking all over the Net for info but not much luck. I need to have some specifics. Can you help me with some good sites or books or both? I have tried Microsoft and they had some info but not much.
Please help!
thanks
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Nov 20, 2001
We are in the process of consolidating all our SQL6.5 and SQL7 databases to a single SQL 7 server - once completed we want to setup a 2 node SQL7/2000 cluster on either NT4 Enterprise or W2k Advanced Server. I would therefore appreciate any advice in choosing between the two platforms based on cost, ease of setup & configuration and ongoing reliabilty & uptime etc - we currently have no NT4 Enterprise Servers so would have to purchase these licenses anyway. Correct me if I am wrong but I also understand that setting up a cluster on NT4 Enterprise is considerabely more complicated and time consuming than on W2K Advanced Server? Any advice would be greatly appreciated..
regards
Marcfw
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Oct 13, 2005
I have a job interview and I need to know what type of questions can be asked about working in a cluster environment, I don't have much experience in clustering, can someone please give me an idea?
Thanks in advance!!
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Mar 19, 2001
Can I implement failover clustering between SQL Server 2000 & SQL Server 7.0? Or do they both need to be the same version of SQL Server.
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Feb 14, 2005
I have a question relating more to documentation and support. I'm trying to find documentation on clustering.
I remember quite some time ago I found a white paper that literally walked you through every step involved in setting up a SQL Server failover cluster. I had also found a white paper that walked you through setting up an Active/Active cluster.
I've been going through Microsoft's site, but all I've found are little bits and pieces.
If anyone can point me in the right direction, or even provide a link, etc. as to where to find some good solid documentation, that would be awesome.
Thanks!!
Anthony
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Sep 21, 2005
If i have an activepassive cluster for SQL Server, under what circumstances would it prompt to automatic changeover to the passive cluster ? Failure of the SQL Server, or let's say 1 user database out of 25 becomes suspect?
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Sep 21, 2007
Is this possible with Express Edition.
We have two servers both running SQL 2005 express. Is there anyway that any changes on one could be replicated on the other?
Thanks
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Jun 6, 2007
HiI would like to know if it's possible to make a basic SQL cluster withwindows 2003 server and SQL 2000 standard edtition. It has to be abasic cluster, I dont need it to be very quick, I can have minutes ofservers down and it's ok.In case the answer is Yes, can you recommend some links to build itup, please?Thanks in advance!!Ignacio
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Jan 7, 2008
what is clustering tell me in detail
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Mar 4, 2008
We currently have a cluster configuration that is running as failover with one shared SAN storage solution. Two servers running Windows Server 2003 Enterprise and SQL 2005 Enterprise. We have two nodes right now running in failover and we will be purchasing a third.
Everything is working now, but we would like to move to an N+1 configuration with two active nodes hosting a separate SQL instance each with one failover node. I've seen N+1 mentioned on about a dozen Microsoft websites, but I cant find any documentation on how to setup or configure this clustering method. Has anyone ever set up a configuration like this or seen any documentation on how to do it? Is it possible to run failover with three nodes, two of them being active?
Any insight would be greatly appreciated.
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Jul 20, 2006
Hi,
Where can I post issues with SQL 2005 clustering. Is there any prereq that needs to be followed before installing SQL 2005 on a windows cluster?
Thanks
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Dec 4, 2006
Hi All,
Is anyone can tell me the difference between log shipping and clustering? I look at it and I think that this is the same thing as they use two different servers.
TIA
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Jul 24, 2000
Does anyone know the answers to either of these, given that we are talking about an active/passive cluster using MSCS, and we use Groupwise for mail (don't ask!)?
1) How do I configure Agent Mail on the cluster under this setup?
2) How do I set up linked servers from this setup to other (non-clustered) SQL servers - I can set up the cluster virtual server as a linked server from the others OK, but the other way around doesn't work - perhaps not surprisingly, but is there a way around it?
Thanks
Martin
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Aug 11, 2000
I need some documentation on how to trouble shoot clustering SQL7EE. I have setup the cluster and looks like it is working but I missed somthing. When I test a failover by pulling the Network cable to the main network not the heartbeat network both boxes lock up. I can failover by powering down one box and using the MSCluster Admin. I am using NT40 6a on Dell PowerEdge 2400 and PowerValut 211s
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May 1, 2000
Is any doing any using Microsoft's Clustering technology as a failover
system with NT/SQL Server ?
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May 1, 2000
Those of you who are using MS Clustering, what are some advantages vs. a third party product such as "Double-Take" ? If you have used "Doube-Take" I would be extremely interested in your thought of the product.
Is it relatively easy to setup and configure with and environment
that's using all the standard products of BACKOFFICE (SQL Server 7.0 Standard Edition, NT 4.0 Standard Edition etc...)
Any hints, tips, etc... would be also GREATLY appreciated.
Thanks in advance.
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Jan 28, 2000
I have a question about database clustering. I am loking for the solution for the databse scalability, performance and zero downtime especially for MS SQL Server. As my understanding (correct if I am wrong), only Oracle provides 2 DB Servers (parallel server) or NT clustering for two sql servers. The drawback for these solution is only one server is working and another one is standing by. It is not efficent (which only 50%). Is any way that I could built the DB server farm which every DB server is working, if one failed, throw it away, rest of them still working; if I need more power, just add another db server box.How to solve the data sync problem ? Replication is not good for more than 4 or 5 db servers in the farm. Disk mirror is not good since if the server is down, there is no way to access the disks. DO you have any good idea ?
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Jan 24, 2001
Hi Guys,
I am installing sqlserver 7.0 in cluster server.
When I start with Installing the MSDTC and give the IP Address
of the Virtual server, It is giving message:
IP Address is in use.
I couldn't able to continue the installation further
Kindly advice me asap.
Thanks in advance,
Anu
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Sep 7, 1999
2 Clustering Questions for you.
1. If I cluster 2 SQL servers in an active/active configuration and want to have a seperate disk array to house the data, do I need to have 2 disk arrays, one per server, or can I have one disk array?
2. When installing an application's database on the first(primary) sql server in an active/active configuration, do I need to install it on the second(secondary) server also? The second server will pick up the processes if the first fails.
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Aug 24, 2000
Hello,
How do i can configure sql server Cluster in mode Failover Active-Active?
Is possible?
Please help me
Thanks
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Jun 17, 2005
For SQL 2000, what are the licensing requirements for a clustered environment? I thought you needed datacenter for the OS, is there a clustered version of sql server, or do you need 2 copies of enterprise edition. Also, if you cluster can you license sql cals for clients, or do you have to do by processor?
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Mar 12, 2002
We are going to implement a SQL 2000 cluster in an active/passive setup. We are going to use multiple instances. What I am confused about is the naming of the virtual server and instances. In the microsoft documentation it states that all instance/virtual names must be unique across all nodes in the cluster. But the client always specifies the same virtual server name when connecting so how can the names be unique across all nodes??
I would have thought that if there was an instance created called inst1 on node A then during the installation that instance name would be replicated to the failover node B. When installing another instance on Node A do you have to specify a different virtual server and instance name on the failover node B??
Please help!!!!!!!
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May 29, 2002
Hello,
I've clustering set up for my production server, My question is when Active sever goes down the Passive server comes up. But what happens when one database gets corrupted does the clustering take place or I've to work with restore.
Thanks for your help
Rea
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Jul 26, 2001
Should SQL Server 2000 (Enterprise edition) running on a Win2K Advanced Server (Active / Passive) cluster fail-over seamlessly?
We have been assured by our suppliers that current client connections (ODBC using TCP/IP) cannot be maintained during a fail-over. The result is that during a fail-over the client applications crash and users have to restart.
Do we have to modify the client application so that during a fail-over it will attempt to re-establish a connection?
Pointers to any resources for SQL 2000 clustering would be gratefully received (especially any which support the view that fail-over should be seamless).
Many Thanks
Mark
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Nov 8, 2006
In a clustered sql server environment having two Nodes, configured as Active/Active or Active/Passive, do I need to create the databases on both the Nodes?
I am not too sure about how to create databases in the clustered environment. Can somebody help..
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Jan 11, 2004
Howdy,
I have had questions from management about whether SQL 2000 clustering on windows 2000 is any good.
We are looking at spending *quite* a bit of money to implement it, but I want a "from the trenches" opinion of what its like , from the people that actually use it & look after it.
e.g.
DOES IT WORK LIKE IT SHOULD????????
Is it reliable?
Is it resource hungry?
Can I trust it to do what its supposed to do?
All repsonses very welcome. No response too small.
Thanks for your help.
Cheers,
SG.
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