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looking to speed up file operations on mounted data - reduce retention policy?

jordanl
over 7 years ago

I've been posting about this same project for a few weeks, and getting great answers.   I've learned if I want to work with lots of data quickly I need fast drives in the repository.    but for now I'm stuck with my 7200rpm sata drives.

It takes about 10 min to take Ownership of a directory that has about 3.0gb /4,000files (I'm restoring from a different domain, fun), then it takes about 45min to drag and drop those files.    

If I make the retention policy 1 day, and that's it, will that speed things up a bit?   I'm doing it right now anyways.  we don't use the inbound replicated machines for anything other than this project of moving corp data to our home base.

  • 0 over 7 years ago
    Hi Jordanl:
    You raise two good points that are of interest for most users:
    1. Permissions
    2. File recovery efficiency

    1. There are various ways solving the permissions issue without actually changing them. As you noted, the recovery points are mounted keeping the same permissions structure as on the original volume. As such you have three possibilities when accessing that data:

    *Taking ownership (which you do),
    * Logging on the core server with credentials that would allow you accessing the data (which may be a big headache if you do it with cross domain credentials)

    or, if the System account is allowed to access the data you try to restore (and, as a good practice, it should be), by

    *impersonating the System Account.

    This latest is, in my opinion the best approach. It can be achieved with Sysinternals' PSEXEC.

    Details on how to use it may be found in the KB below:

    How to access files on a mounted Recovery Point without having specific permissions
    support.software.dell.com/.../179061

    2. Copying quickly large amounts of files is not a Windows stellar capability. To increase the speed of file recovery you need to use a third party application allowing you to use multiple streams of data. Additionally you may want to keep the permissions structure. (BTW, have you noticed the "Copy with Permissions feature in the mouse right-click context on the core?).

    Examples of this kind of applications are robocopy (command line, built into windows) and richcopy (still a free Microsoft application, using a GUI).

    For robocopy, please refer to:

    How to recover files and folders using Robocopy and Powershell Helper Scripts
    support.software.dell.com/.../121638

    Richcopy is nicely presented (and can be downloaded from) here:
    technet.microsoft.com/.../2009.04.utilityspotlight.aspx

    Please note that you have to combine PSExec with any of these utilities (as shown in the first referenced KB) to override the permissions issue.

    Please let us know how it goes.