Backup Central

I've been asked how Networker handles open files on our Linux server. In
paticular there is a Samba share that may have open FoxPro database files.

I've never seen any error messages in regards to files that cannot be
backed up for some reason.

Do open files get skipped? If so, is there a log somewhere that could
tell me what files did not get backed up?

TIA,
Diane

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Hello Diane,

Open files not backed on Windows because on the OS locking mechanism that is completly different on UNIX OSes.
The files on the Linux server can then be read and backed up while they are accessed by another process, the only thing to take care of : Is your backup consistant since, the file is backed up while it is accessed by another process. Which is particulary the case on databases ?
In your example you should use either a cold backup (stop the database, run the backup, restart the db) , or a backup to a flat file (preferably on another file system) that will be taken by an usual file system backup.

Regards,
Tarik



Diane Rolland <drolland < at > KDINET.COM> wrote:
I've been asked how Networker handles open files on our Linux server. In
paticular there is a Samba share that may have open FoxPro database files.

I've never seen any error messages in regards to files that cannot be
backed up for some reason.

Do open files get skipped? If so, is there a log somewhere that could
tell me what files did not get backed up?

TIA,
Diane

Note: To sign off this list, send a "signoff networker" command via email
should be sent to stan < at > temple.edu


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I've been asked how Networker handles open files on our Linux server. In
paticular there is a Samba share that may have open FoxPro database files.

I've never seen any error messages in regards to files that cannot be
backed up for some reason.

Do open files get skipped? If so, is there a log somewhere that could
tell me what files did not get backed up?

No. On UNIX, open files can still be read by other processes, so they
are not skipped. On Windows, this task is more difficult.

However even if the file can be read by another process, that does not
mean that the data is suitable for restoration. Because it takes time
to read the file, if the database is modifying the data, the copy on
tape may not be consistent.

I don't know FoxPro, but it may have some restrictions on how its data
can be backed up and restored. It may need to be quiesced before
running the backup.



Darren Dunham ddunham < at > taos.com
Senior Technical Consultant TAOS http://www.taos.com/
Got some Dr Pepper? San Francisco, CA bay area
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