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database on a Ramdisk

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  • database on a Ramdisk

    a5 guru,

    pls. i need your suggestion on this

    i have a windows 2003 server, 4gb ram, i set the 3gb to a ramdisk using a QSOFTRAMDISK ENTERPRISE.

    so far my database size is only 1.5gb
    my database in the ramdisk is sync (write mode) in to an image file in the local drive. i've notice the overall performance of my database in the LAN is very fast (ratio is some what 25x to 50x speed).

    is this a good or bad setup?
    is there a possible problem will arise on this setup.

    tnx.
    "Knowledge without application is useless."

  • #2
    Re: database on a Ramdisk

    You could have problems.

    When operating in a ram disk, everything you do is in memory. You have to make sure to save all back to the hard drive before you shut down. Also, A power failure???

    writing data to a dbf in ram disk is probably unmeasureably fast compared to a regular disk. The tables have to be saved back to disk as well as .fpt and cdx files. The rest is no problem.

    Hope i helped.

    When we used a ram disk in the 80's and later it was mostly for compiling exe's(large ones). In those days it could take an hour(or more) to compile and it took 10 minutes in a ram disk. We would sometimes load the whole program in a ram disk and write the data back to disk on every save to avoid loss. We also had to work out our own memory spaces for the loading of the programs without the ram disk. It was a lot harder then! Alpha does most of this for us now and windows makes it real easy with their memory alottment system.

    It takes some planning with a ram disk, but could possibly be beneficial if used right.

    I do NOT plan using a ram disk anymore.

    .


    .
    Last edited by DaveM; 08-29-2009, 09:21 AM.
    Dave Mason
    [email protected]
    Skype is dave.mason46

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    • #3
      Re: database on a Ramdisk

      I don't see RAM disks used anymore. I suspect part of the reason is the OS caches disk reads and writes much better than in the 80's.

      Overall, the push is to use SQL (not just by Alpha) and SQL doesn't use RAM disks.

      Comment


      • #4
        Re: database on a Ramdisk

        tnx to all.

        now i know.

        it is better to use local drive for safety data recording and use sql to give more speed to alpha.

        and i'll upgrade my LAN100 to LAN1gb for more speed (10x)

        tnx.
        "Knowledge without application is useless."

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