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MIS Systems Thread, new server in Technical; See if LEA can offer central hosted SIMS. If you've got a server, don't bother, sounds like you need to ...
  1. #16

    matt40k's Avatar
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    See if LEA can offer central hosted SIMS.

    If you've got a server, don't bother, sounds like you need to wait until the end of your rolling cycle David. Unless the clients needs upgrading

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    Quote Originally Posted by matt40k View Post
    See if LEA can offer central hosted SIMS.
    We're a private school, so we don't have an LEA.

    If you've got a server, don't bother, sounds like you need to wait until the end of your rolling cycle
    We don't have one of those, either. No, I was just wondering if it was a good idea to run the SIMS server on the same machine that would be doing terminal services, but looking at the machine it turns out it only actually has 2GB of RAM (cheap motherboard bought off eBay last year that can only take 2GB of RAM total, unless you buy more expensive fancy RAM). Think I'll definitely be moving the SIMS server to a VM, then I'll see if that spare server can do TS (with 2GB of RAM, might be pushing it a bit).

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  3. #18

    matt40k's Avatar
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    You don't have a replace\upgrade plan for computers?

    So do you do it on a per problem bases?

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    As stated above, the more cores the merrier, regards hard-drives, something SAS (Serial Attached SCSI) is what you should got for.

    Our Facility, ePortal server has SAS 15k RPM drives, and performs faultlessly, specially with everyone writing, reading to the server!

  5. #20

    dhicks's Avatar
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    Quote Originally Posted by matt40k View Post
    You don't have a replace\upgrade plan for computers? So do you do it on a per problem bases?
    I aim to simply have all our servers operate as virtual machines, all mirrored between one another, so if one server breaks then other servers can take over the running of server's VMs. Ideally all our server hardware would be managed as an abstracted "cloud" and I wouldn't know or care what exactly what hardware was installed, but realistically we only have enough money to buy bits and pieces of hardware here and there throughout the year. Hence I've been tending to buy those Dell £99 special offer machines - we now have about five of those, they're the mainstay of our highly sophisticated server computing architecture :-)

    Seriously, though, the kinds of systems you see in schools are annoyingly behind the cutting-edge stuff you hear about being done in other places. Web application developers are now getting to the stage where they're having to develop new software and techniques to manage the thousands of distributed VMs that make up modern web-based applications, and we're still plunking away at getting some crusty old database software so it can actually be accessed from where users want to be able to use it from!

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    matt40k's Avatar
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    How much does that cost?

    Wonder what the performance is compared to a hardware raid 4x SATA-2 10K RAID-10

    Still depends on Read\Write, I assume RAID-10 would be wasted as you would do more read then writes so RAID-5 would be better.

    I suppose you could look at hard drive with large caches. Solid state hard drives would be THE best for SIMS. Not that I could say, spend £1000+ on a RAID-1 Solid state drive array, only have like 32gb space too. Might as well look at running SIMS in your RAM!! Would take a while to load \ shutdown tho.

  7. #22

    dhicks's Avatar
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    Quote Originally Posted by matt40k View Post
    Might as well look at running SIMS in your RAM!!
    Ah ha! We agree!

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  8. #23

    matt40k's Avatar
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    Quote Originally Posted by dhicks View Post
    Ah ha! We agree!

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    NEVER!!! Lol

    Just looked up the price of a 32gb SSD hdd, it's £110 inc vat and p&p

    There was a program that DID allow you to create a drive in your RAM. The guy stopped dev when 2000 was released. No-one had enough ram to make it worth while. His idea was to load the ENTIRE OS and apps into it. Shame really, Linux can fit into 1gb of ram

  9. #24

    dhicks's Avatar
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    Quote Originally Posted by matt40k View Post
    His idea was to load the ENTIRE OS and apps into it.
    My idea exactly - just run Windows with SIMS as a VM under Linux, have Linux handle the RAM disk part of things.

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    hi,
    just a quick note if you are going Gb Lan then avoid Broadcom chipset like the plague.

    We have spent days in the past trying to trackdown performance issues on our network only to find it was being caused by the Broadcom TOE.

    This is well documented on the web.

    regards

    kim

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    Make sure you use Raid5 with hot spare rather than raid 1 - this will increase your database read speed considerably, and reads is probably at least 3/4 of all IO operations on the sims database, whilst still keeping lots of nice redundancy.

  12. #27

    dhicks's Avatar
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    Quote Originally Posted by Butuz View Post
    Raid5 with hot spare rather than raid 1 - this will increase your database read speed considerably
    Why?

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    recent experience recommends mirroring the OS drive as well as a separate RAID for the data. You should also have a separate drive for the transaction logs as this will improve performance.

    Just for comparison; we are currently running SIMS on a temporary server with a 2.5 dual core cpu and 2Gb RAM without any undue stress on the server and none of the users has noticed much loss of performance. This is in a school of 1300 pupils. We hope we don't have to stick with this for more than a few days but it is an interesting observation.
    Last edited by Hecate; 9th November 2008 at 05:21 PM.



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