1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Server Clustering

Discussion in 'Hardware' started by Fergal1982, Mar 27, 2008.

  1. Fergal1982

    Fergal1982 Petabyte Poster

    4,196
    171
    211
    After a PSU failure on our server, we're considering some sort of clustering setup between two servers, to reduce the chances of it happening again.

    Server is an IIS server, running SQL Server 2005. That pretty much sums up the setup at present.

    I need to set two servers up so that they are live mirrors of each other, with (preferably automatic) failover processes so that if one fails, it switches over to the next one.

    I have no idea about how to go about doing this, so if anyone has links to good sites documenting what to do/how to do it, I would be greatful.
     
    Certifications: ITIL Foundation; MCTS: Visual Studio Team Foundation Server 2010, Administration
    WIP: None at present
  2. Phoenix
    Honorary Member

    Phoenix 53656e696f7220 4d6f64

    5,726
    175
    221
    It's been a while since I set up any MCSC systems
    I'm not sure IIS is a cluster aware app, my understanding was IIS clusters were generally preferred in NLB farms

    again I am not sure on that, someone like Zeb may know a bit better

    the SQL is cluster aware, there are a lot of factors that come in to play though
    personally I would back the SQL server off to its own cluster, then have IIS as an NLB front end or something, thats how most web farms operate
    you can then scale the web front end easier


    this is probably a tad expensive and complex for your needs though, if IIS is cluster aware you could just cluster the system into a MSCS system but you will need shared storage for that as well (either direct attached or preferably SAN
     
    Certifications: MCSE, MCITP, VCP
    WIP: > 0
  3. Fergal1982

    Fergal1982 Petabyte Poster

    4,196
    171
    211
    Just found this site. Seems to think it can be done.

    Question: If I did this, and added a site to IIS on one machine, how does it handle mirroring it onto the second server? Is it handled automatically, or would I have to manually publish to both?

    Will the clustering keep both servers current as regards data, etc? I have application files that would need to be available to both.

    Also, someone mentioned that you need to use identical servers to do this, is that true? Is could we set up a vmware server on another machine and use it as a the second server inthe cluster?
     
    Certifications: ITIL Foundation; MCTS: Visual Studio Team Foundation Server 2010, Administration
    WIP: None at present
  4. neutralhills

    neutralhills Kilobyte Poster

    366
    28
    64
    This is generally done by having both systems store the site on a fault-tolerant external hard drive unit. That or you can use disk mirroring software that duplicates changes from the first system to the next.

    I used the former setup years ago and it works, but I've been out of that game for a while. It can be done, however. I did it using W2K Server.
     
    Certifications: Lots.
    WIP: Upgrading MS certs
  5. Sparky
    Highly Decorated Member Award

    Sparky Zettabyte Poster Moderator

    10,189
    296
    319
    Perhaps migrate to a higher spec server with 2 PSUs?
     
    Certifications: MSc MCSE MCSA:M MCSA:S MCITP:EA MCTS(x5) Security+ Network+ A+
    WIP: Exchange 2007\2010
  6. Fergal1982

    Fergal1982 Petabyte Poster

    4,196
    171
    211
    it had them. fried them both - and its not the first time we've had one of these servers do this apparently.
     
    Certifications: ITIL Foundation; MCTS: Visual Studio Team Foundation Server 2010, Administration
    WIP: None at present
  7. Sparky
    Highly Decorated Member Award

    Sparky Zettabyte Poster Moderator

    10,189
    296
    319
    Weird,is the server on a UPS?
     
    Certifications: MSc MCSE MCSA:M MCSA:S MCITP:EA MCTS(x5) Security+ Network+ A+
    WIP: Exchange 2007\2010
  8. Fergal1982

    Fergal1982 Petabyte Poster

    4,196
    171
    211
    yeppers.
     
    Certifications: ITIL Foundation; MCTS: Visual Studio Team Foundation Server 2010, Administration
    WIP: None at present
  9. Sparky
    Highly Decorated Member Award

    Sparky Zettabyte Poster Moderator

    10,189
    296
    319
    Email alerting working ok? Might be an issue with the UPS which is damaging the server.
     
    Certifications: MSc MCSE MCSA:M MCSA:S MCITP:EA MCTS(x5) Security+ Network+ A+
    WIP: Exchange 2007\2010
  10. Fergal1982

    Fergal1982 Petabyte Poster

    4,196
    171
    211
    that server doesnt have any email alerting set up on it.
     
    Certifications: ITIL Foundation; MCTS: Visual Studio Team Foundation Server 2010, Administration
    WIP: None at present
  11. Sparky
    Highly Decorated Member Award

    Sparky Zettabyte Poster Moderator

    10,189
    296
    319
    Alerts are good :biggrin
     
    Certifications: MSc MCSE MCSA:M MCSA:S MCITP:EA MCTS(x5) Security+ Network+ A+
    WIP: Exchange 2007\2010
  12. Fergal1982

    Fergal1982 Petabyte Poster

    4,196
    171
    211
    Got any links for how to set it up, and what you can set up with it?
     
    Certifications: ITIL Foundation; MCTS: Visual Studio Team Foundation Server 2010, Administration
    WIP: None at present
  13. dmarsh

    dmarsh Terabyte Poster

    3,782
    302
    184
    Well you can do round robin DNS or you get get a hardware load balancer or CSS.

    http://www.dealtime.co.uk/xPF-Cisco...ices-Switch-Load-balancing-device-CSS11503-AC

    Since this does not involve IIS being cluster aware you need to manually ensure the servers have identical config.

    You can use a NFS share or some other storage technology to minimise this.

    You won't get session replication either if you don't configure IIS.

    You could use the cluster services but this is not normally that great.

    http://forums.iis.net/t/1091387.aspx
    http://news.zdnet.co.uk/hardware/0,1000000091,2124314-2,00.htm
     
    Certifications: CITP, BSc, HND, SCJP, SCJD, SCWCD, SCBCD, SCEA, N+, Sec+, Proj+, Server+, Linux+, MCTS, MCPD, MCSA, MCITP, CCDH
  14. Sparky
    Highly Decorated Member Award

    Sparky Zettabyte Poster Moderator

    10,189
    296
    319
    What kinda UPS is it? APC?
     
    Certifications: MSc MCSE MCSA:M MCSA:S MCITP:EA MCTS(x5) Security+ Network+ A+
    WIP: Exchange 2007\2010
  15. BrizoH

    BrizoH Byte Poster

    243
    6
    25
    If you don't have the hardware for a proper clustering solution it might be worth looking at this

    We use it for SQL replication/failover but I understand it can also be used for IIS - it does the job and is a lot cheaper than alternatives like XOSoft etc
     
    Certifications: CCNA, CCNA Security
    WIP: CCNP

Share This Page

Loading...