BackupExec Slows Backup Speed as job progresses - Veritas Backup Exec

This is a discussion on BackupExec Slows Backup Speed as job progresses - Veritas Backup Exec ; Windows NT Server At the beginning of the backup I am running at about 100 m/s, but about 1/10 of the way through it bogs down to 10 m/s and stays there. We have noticed this is about the time ...

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Thread: BackupExec Slows Backup Speed as job progresses

  1. BackupExec Slows Backup Speed as job progresses


    Windows NT Server
    At the beginning of the backup I am running at about 100 m/s, but about 1/10
    of the way through it bogs down to 10 m/s and stays there. We have noticed
    this is about the time BackupExec starts backing up it's own files, but more
    specifically it's catalogs. Any idea how to fix this, or is it just simply
    a matter of, don't backup the catalog files? Thank you for any help you
    can give.

  2. Re: BackupExec Slows Backup Speed as job progresses

    We get this on restores using V8 build 3314. It seems OK if we restore a
    full disk, but if we start selecting Folders and Sub-Folders, you can see
    the throughput clocking down.

    Ken McNulty

    Gordon Smith wrote in message <392eb3ac@hronntp01.>...
    >
    >Windows NT Server
    >At the beginning of the backup I am running at about 100 m/s, but about

    1/10
    >of the way through it bogs down to 10 m/s and stays there. We have noticed
    >this is about the time BackupExec starts backing up it's own files, but

    more
    >specifically it's catalogs. Any idea how to fix this, or is it just simply
    >a matter of, don't backup the catalog files? Thank you for any help you
    >can give.




  3. Re: BackupExec Slows Backup Speed as job progresses

    I have seen this too. I can get a backup at about 384MB/m (DLT7000). The job
    takes 32 minutes to get 9GB. Doing a restore takes closer to 2.5 hours, and
    tape throughput starts at about 80, peaks at 200, then by the time the job
    has finished, it is back to about 85 or 90.

    I actually believe it is more a problem with the NT4.0 I/O Kernel, as large
    FTP transfers from one server to another (I moved 24.9GB via FTP about a
    week ago) start out around 400MB/m, and ended at about 115MB/m. Using pure
    IP, no NetBIOS, no RPC, no windows interface. It all happened through a VDM
    in a CLI FTP session.

    I believe Windows 2000 has largely remedied this problem.

    T
    "Ken McNulty" wrote in message
    news:39620f63@hronntp01....
    > We get this on restores using V8 build 3314. It seems OK if we restore a
    > full disk, but if we start selecting Folders and Sub-Folders, you can see
    > the throughput clocking down.
    >
    > Ken McNulty
    >
    > Gordon Smith wrote in message <392eb3ac@hronntp01.>...
    > >
    > >Windows NT Server
    > >At the beginning of the backup I am running at about 100 m/s, but about

    > 1/10
    > >of the way through it bogs down to 10 m/s and stays there. We have

    noticed
    > >this is about the time BackupExec starts backing up it's own files, but

    > more
    > >specifically it's catalogs. Any idea how to fix this, or is it just

    simply
    > >a matter of, don't backup the catalog files? Thank you for any help you
    > >can give.

    >
    >




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