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Hardware Thread, SSD server storage migration in Technical; Originally Posted by zag Yeh Dell do the same, ridiculous really. Intel are the most reliable SSD on the market, ...
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    Quote Originally Posted by zag View Post
    Yeh Dell do the same, ridiculous really. Intel are the most reliable SSD on the market, I see no reason to go with anyone else.
    There is a reason why those drives are expensive, basically write endurance and consistent performance over a number of years, many use SLC flash vs MLC found in most consumer grade SSDs.

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    Quote Originally Posted by Tallwood_6 View Post
    There is a reason why those drives are expensive, basically write endurance and consistent performance over a number of years, many use SLC flash vs MLC found in most consumer grade SSDs.
    The write endurance is totally irrelevant in most real world situations. I proved it in another thread somewhere that our Sims server (on ssd) could run for something stupid like 200 years before the wear levelling ran out.

    I could maybe understand if it was a caching server in a data center but other than that its a pointless statistic
    Last edited by zag; 24th January 2013 at 09:59 AM.

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    Yes untimately they are aimed at those intending to run heavy workload databases which can burn through program/erase cycles.

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    Quote Originally Posted by zag View Post
    I proved it in another thread somewhere that our Sims server (on ssd) could run for something stupid like 200 years before the wear levelling ran out.
    I'd like to see how quickly I could wear out an SSD under 'normal' usage. What tool did you use to measure the IO on your existing server?

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    I guess only time will tell on how well the Intels stand up vs "Enterprise" SSDs, depends if you're willing to run the risk of a bunch of them dying in a year or two time if the worst happens vs the speed increase you get right now

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    Quote Originally Posted by Arthur View Post
    If you take your SSDs apart you'll find six 470µF capacitors inside that enable the controller to write data safely back to the drive in the event of sudden power loss.
    Mine look a bit different:
    Samsung-SSD-SM825-PCB-Bottom.jpg

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    zag
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    Quote Originally Posted by Ric_ View Post
    I'd like to see how quickly I could wear out an SSD under 'normal' usage. What tool did you use to measure the IO on your existing server?
    I think it was this one SsdReady: Life measurement and monitoring tool for solid-state drives but the trial ran out so I uninstalled it.

    The data was something like 400mb writes a day (yes seriously that low) for a 1000 pupil school who use Sims extensively.

    We've run Sims on an SSD for 2 and a half years now and the tool reported 97% lifespan. Not sure how accurate it is but its nice to know.
    Last edited by zag; 24th January 2013 at 12:38 PM.

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    Quote Originally Posted by zag View Post
    I think it was this one SsdReady: Life measurement and monitoring tool for solid-state drives but the trial ran out so I uninstalled it.

    The data was something like 400mb writes a day (yes seriously that low) for a 1000 pupil school who use Sims extensively.

    We've run Sims on an SSD for 2 and a half years now and the tool reported 97% lifespan. Not sure how accurate it is but its nice to know.
    That is very low... do you store the database in RAM and write back once or twice a day?

    I'm not entirely sure that I am running that tool correctly because my desktop thinks it will be writing 38GB per day :-\

    Out of interest, how long does the Intel tool say you have left on your database logfile drive and backup servers? (see http://downloadcenter.intel.com/Deta...&DwnldID=18455)

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    zag
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    99% lol

    Image1.jpg

    From my experience with MS SQL server it uses very little disk writes, I was suprised. I guess it does it all in RAM most of the time.
    Last edited by zag; 24th January 2013 at 12:55 PM.

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    @zag: That is very low utilisation... What about the backup server?

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    sims credentials.txt ... really?

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    Quote Originally Posted by nicklec View Post
    sims credentials.txt ... really?
    Good spot!

    I hope there are not passwords in there!!!

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    Quote Originally Posted by Rawns View Post
    Good spot!

    I hope there are not passwords in there!!!
    Haha no its the database strings you need to connect to DBbackup, Discover and DBattach. Always forget those

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    zag
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    Quote Originally Posted by Ric_ View Post
    @zag: That is very low utilisation... What about the backup server?
    Sadly our SSD Backup server is virtualized and that tool doesn't appear to work on virtual machines.

    Shame really as it would have interesting to see how long it has left writing 120GB+ a week to the drives.

    Its 6 months old and no problems so far.

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