Windows Vista Forums

windows events

  1. #1


    arno Guest

    windows events



    Hi,

    I am about to develop a WSH script that will compare files (office
    templates) in a central storage location to local files, and copy them
    to the local system if necessary. Lots of users, heterogenous setup OS-
    wise.

    There are quite a lot of files to compare (>300). and some of them are
    rather big (>3MB). Copying them over a VPN connection will take a bit of
    time.

    The script will be started from VBA code using a timer.

    The idea is to have local user templates be updated without user-
    intervention and without disruption of the users normal routines.

    The script will essentially be a recursive algorhythm that will compare
    files on the server to files on the local system, and copy them if the
    files on the server are newer (in essence, a one-way syncing mechanism).

    Since it can potentially involve heavy copying, I am worried about what
    happens if a user shuts the system down.

    1. What happens if a FileCopy operation is in progress?
    2. what happens if the scripts routine (compare/(copy)/recurse) is still
    in progress?

    As to 1., will the operation be aborted, potentially leaving the user
    with a corrupted new copy of a file?
    As to 2., is there a way to do something like 'windows is shutting down
    event so exit'? Is it needed?

    Any thoughts are much appreciated,

    TIA,
    arno

      My System SpecsSystem Spec

  2. #2


    Paul Randall Guest

    Re: windows events


    "arno" <noreplyAThighiqDOTnl@xxxxxx> wrote in message
    news:MPG.23ca2692e78a0396989682@xxxxxx

    >
    >
    > Hi,
    >
    > I am about to develop a WSH script that will compare files (office
    > templates) in a central storage location to local files, and copy them
    > to the local system if necessary. Lots of users, heterogenous setup OS-
    > wise.
    >
    > There are quite a lot of files to compare (>300). and some of them are
    > rather big (>3MB). Copying them over a VPN connection will take a bit of
    > time.
    >
    > The script will be started from VBA code using a timer.
    >
    > The idea is to have local user templates be updated without user-
    > intervention and without disruption of the users normal routines.
    >
    > The script will essentially be a recursive algorhythm that will compare
    > files on the server to files on the local system, and copy them if the
    > files on the server are newer (in essence, a one-way syncing mechanism).
    >
    > Since it can potentially involve heavy copying, I am worried about what
    > happens if a user shuts the system down.
    >
    > 1. What happens if a FileCopy operation is in progress?
    > 2. what happens if the scripts routine (compare/(copy)/recurse) is still
    > in progress?
    >
    > As to 1., will the operation be aborted, potentially leaving the user
    > with a corrupted new copy of a file?
    > As to 2., is there a way to do something like 'windows is shutting down
    > event so exit'? Is it needed?
    >
    > Any thoughts are much appreciated,
    >
    > TIA,
    > arno
    I have a comment about the comparison problem:

    Why not set up a script on all of the machines that will create a table of
    checksums for all these files of interest on the system; they might update
    the checksums on a regular basis or on demand from a central location. This
    would require minimal bandwidth and would spread the bulk of the CPU
    requirements to minimize the impact on any one system. Then your script
    would only have to compare the table entries for the files in question and
    only copy those files that are out of date. I think Microsoft's Capicom
    object is scriptable and will create CRC32 and MD5 checksums, and is freely
    downloadable to those machines on which it does not already reside.
    http://www.microsoft.com/downloads/r...DisplayLang=en

    -Paul Randall



      My System SpecsSystem Spec

  3. #3


    Chip Orange Guest

    Re: windows events

    You don't really need to reinvent the wheel; MS has both XCopy and Robocopy
    utilities, which will copy based on newer dates, to do this kind of thing
    for you.

    I believe they handle the situation where the copy was not allowed to
    complete properly; however, if you must do this yourself, copy the file to a
    temporary directory on the same drive as your destination file, and when the
    copy is complete, delete the destination file and rename the copy in the
    temp directory to the name of the destination file.

    hth,

    Chip


    "arno" <noreplyAThighiqDOTnl@xxxxxx> wrote in message
    news:MPG.23ca2692e78a0396989682@xxxxxx

    >
    >
    > Hi,
    >
    > I am about to develop a WSH script that will compare files (office
    > templates) in a central storage location to local files, and copy them
    > to the local system if necessary. Lots of users, heterogenous setup OS-
    > wise.
    >
    > There are quite a lot of files to compare (>300). and some of them are
    > rather big (>3MB). Copying them over a VPN connection will take a bit of
    > time.
    >
    > The script will be started from VBA code using a timer.
    >
    > The idea is to have local user templates be updated without user-
    > intervention and without disruption of the users normal routines.
    >
    > The script will essentially be a recursive algorhythm that will compare
    > files on the server to files on the local system, and copy them if the
    > files on the server are newer (in essence, a one-way syncing mechanism).
    >
    > Since it can potentially involve heavy copying, I am worried about what
    > happens if a user shuts the system down.
    >
    > 1. What happens if a FileCopy operation is in progress?
    > 2. what happens if the scripts routine (compare/(copy)/recurse) is still
    > in progress?
    >
    > As to 1., will the operation be aborted, potentially leaving the user
    > with a corrupted new copy of a file?
    > As to 2., is there a way to do something like 'windows is shutting down
    > event so exit'? Is it needed?
    >
    > Any thoughts are much appreciated,
    >
    > TIA,
    > arno


      My System SpecsSystem Spec

  4. #4


    arno Guest

    Re: windows events

    Tx. Didn't know abt robocopy. Seems like that would be the tool of
    choice for this, but it seems it is Vista-specific (would require
    additional install on XP?) By now I've already written a util :-) It
    does indeed use a temporary filename.

    arno


    In article <uPplj8adJHA.1916@xxxxxx>,
    Chip.Orange@xxxxxx says...>

    > You don't really need to reinvent the wheel; MS has both XCopy and Robocopy
    > utilities, which will copy based on newer dates, to do this kind of thing
    > for you.
    >
    > I believe they handle the situation where the copy was not allowed to
    > complete properly; however, if you must do this yourself, copy the file to a
    > temporary directory on the same drive as your destination file, and when the
    > copy is complete, delete the destination file and rename the copy in the
    > temp directory to the name of the destination file.
    >
    > hth,
    >
    > Chip
    >
    >
    > "arno" <noreplyAThighiqDOTnl@xxxxxx> wrote in message
    > news:MPG.23ca2692e78a0396989682@xxxxxx

    > >
    > >
    > > Hi,
    > >
    > > I am about to develop a WSH script that will compare files (office
    > > templates) in a central storage location to local files, and copy them
    > > to the local system if necessary. Lots of users, heterogenous setup OS-
    > > wise.
    > >
    > > There are quite a lot of files to compare (>300). and some of them are
    > > rather big (>3MB). Copying them over a VPN connection will take a bit of
    > > time.
    > >
    > > The script will be started from VBA code using a timer.
    > >
    > > The idea is to have local user templates be updated without user-
    > > intervention and without disruption of the users normal routines.
    > >
    > > The script will essentially be a recursive algorhythm that will compare
    > > files on the server to files on the local system, and copy them if the
    > > files on the server are newer (in essence, a one-way syncing mechanism).
    > >
    > > Since it can potentially involve heavy copying, I am worried about what
    > > happens if a user shuts the system down.
    > >
    > > 1. What happens if a FileCopy operation is in progress?
    > > 2. what happens if the scripts routine (compare/(copy)/recurse) is still
    > > in progress?
    > >
    > > As to 1., will the operation be aborted, potentially leaving the user
    > > with a corrupted new copy of a file?
    > > As to 2., is there a way to do something like 'windows is shutting down


      My System SpecsSystem Spec

  5. #5


    Chip Orange Guest

    Re: windows events

    I believe robocopy is available for xp, but it is a separate download as you
    say (I think it's in the xp resource kit).

    still, it does so much it's worth pushing out (there's no installation, just
    copy it to some directory on the path, that's it). So you add one line to
    copy it to your script, then from then on you can use robocopy to copy the
    templates.


    "arno" <noreplyAThighiqDOTnl@xxxxxx> wrote in message
    news:MPG.23d7043ec2f481a2989688@xxxxxx

    > Tx. Didn't know abt robocopy. Seems like that would be the tool of
    > choice for this, but it seems it is Vista-specific (would require
    > additional install on XP?) By now I've already written a util :-) It
    > does indeed use a temporary filename.
    >
    > arno
    >
    >
    > In article <uPplj8adJHA.1916@xxxxxx>,
    > Chip.Orange@xxxxxx says...>

    >> You don't really need to reinvent the wheel; MS has both XCopy and
    >> Robocopy
    >> utilities, which will copy based on newer dates, to do this kind of thing
    >> for you.
    >>
    >> I believe they handle the situation where the copy was not allowed to
    >> complete properly; however, if you must do this yourself, copy the file
    >> to a
    >> temporary directory on the same drive as your destination file, and when
    >> the
    >> copy is complete, delete the destination file and rename the copy in the
    >> temp directory to the name of the destination file.
    >>
    >> hth,
    >>
    >> Chip
    >>
    >>
    >> "arno" <noreplyAThighiqDOTnl@xxxxxx> wrote in message
    >> news:MPG.23ca2692e78a0396989682@xxxxxx

    >> >
    >> >
    >> > Hi,
    >> >
    >> > I am about to develop a WSH script that will compare files (office
    >> > templates) in a central storage location to local files, and copy them
    >> > to the local system if necessary. Lots of users, heterogenous setup OS-
    >> > wise.
    >> >
    >> > There are quite a lot of files to compare (>300). and some of them are
    >> > rather big (>3MB). Copying them over a VPN connection will take a bit
    >> > of
    >> > time.
    >> >
    >> > The script will be started from VBA code using a timer.
    >> >
    >> > The idea is to have local user templates be updated without user-
    >> > intervention and without disruption of the users normal routines.
    >> >
    >> > The script will essentially be a recursive algorhythm that will compare
    >> > files on the server to files on the local system, and copy them if the
    >> > files on the server are newer (in essence, a one-way syncing
    >> > mechanism).
    >> >
    >> > Since it can potentially involve heavy copying, I am worried about what
    >> > happens if a user shuts the system down.
    >> >
    >> > 1. What happens if a FileCopy operation is in progress?
    >> > 2. what happens if the scripts routine (compare/(copy)/recurse) is
    >> > still
    >> > in progress?
    >> >
    >> > As to 1., will the operation be aborted, potentially leaving the user
    >> > with a corrupted new copy of a file?
    >> > As to 2., is there a way to do something like 'windows is shutting down
    >
    >


      My System SpecsSystem Spec


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