[SunHELP] query about ufsdump

[Gil Young]

Although technically you should make sure the state of the file system is
unused or offline, I have done backups live like you speak without an issue
for the past, oh, 13 years, on file and print server type systems, as long
as the backups are run at 2-3 AM or so it is pretty safe to assume noone
will be there to mess with their files during the backup.  But if you are
running a database you will probably want to make sure that the database is
in a down or offiline state before backups.  It is never good to backup a
live database while it is being used, and it is better stillto get backup
software that is savvy to your particular database and can automatically
handle a "live" backup if that is a major goal.

This is all IMHO.

Gil Young
Call Sign: W1GJY
----- Original Message -----
From: "TAG DBA" <dbatag at tatainfotech.com>
To: <sunhelp at sunhelp.org>
Sent: Friday, November 30, 2001 12:27 AM
Subject: [SunHELP] query about ufsdump


> Hello,
> A number of books give the following kind of examples for using ufsdump
> $ ufsdump 0ucf /dev/rmt/0  /s3104/home1
>
> Note that they are referring to the mount point - meaning that the file
system
> is mounted. However Sun manuals say that one should preferably unmount the
> filesyste, before taking a ufsdump. Which means my example would look
like:
> $ ufsdump 0ucf /dev/rmt/0 /dev/rdsk/c0t1d30s4
>
> This confuses me - is it allright to take a ufsdump while the file system
> being backed up is mounted (and perhaps potentially in use). Will I be
able to
> restore and recover from such a dump ?
>
> Thanks and Regards,
> ~aslam
> _______________________________________________
> SunHELP maillist  -  SunHELP at sunhelp.org
> http://www.sunhelp.org/mailman/listinfo/sunhelp
>