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Full Discussion: Advice on a backup script, maybe one is out there already?
Top Forums UNIX for Advanced & Expert Users Advice on a backup script, maybe one is out there already? Post 302987534 by rbatte1 on Monday 12th of December 2016 08:19:26 AM
Old 12-12-2016
If the content is a database, then backing up in this way may also not give you a consistent restore in any case, especially if you are unable to read some of them!

You might be better getting the database tools to make a backup. Another alternate (but I'm guaranteeing it) might be to use LVM snapshots if you OS supports it. This way, you can be sure that the files are idle and although the database might go into crash-recovery (as though you've had a power loss) it should give you a point-in-time restore from when you split off the copy.

What OS are you using?

One worries that this is not a good plan though. If you cannot read all the data, how would you plan to restore it?


On your point about getting it to run faster, it will always depend on a number of factors, such as volume of data, if there is I/O contention etc. I/O contention can occur for various reasons, such as sharing physical media/access path (shared controllers, fibre etc.) or other users even.

Is the device SAN based? There may be a way to use SAN tools to copy a LUN that would give a suitable restore point. Of course it would revert everything on that LUN, so that might not be what you want, but perhaps you could mount the copy LUN as another filesystem and back that up away from the live database.


Can you explain a bit more about your server setup?


Kind regards,
Robin
 

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LEARN ABOUT SUSE

vgcfgrestore

VGCFGRESTORE(8) 					      System Manager's Manual						   VGCFGRESTORE(8)

NAME

       vgcfgrestore - restore volume group descriptor area

SYNOPSIS

       vgcfgrestore [-d|--debug] [-f|--file filename] [-l[l]|--list] [-h|--help] [-M|--Metadatatype1|2] [-t|--test] [-v|--verbose] VolumeGroupName

DESCRIPTION

       vgcfgrestore  allows  you  to  restore  the metadata of VolumeGroupName from a text backup file produced by vgcfgbackup.  You can specify a
       backup file with --file.  If no backup file is specified, the most recent one is used.  Use --list for a list of the available  backup  and
       archive files of VolumeGroupName.

OPTIONS

       -l | --list -- List files pertaining to VolumeGroupName
	      List  metadata  backup  and  archive  files  pertaining  to VolumeGroupName.  May be used with the -f option.  Does not restore Vol-
	      umeGroupName.

       -f | --file filename -- Name of LVM metadata backup file
	      Specifies a metadata backup or archive file to be used for restoring VolumeGroupName.  Often this file has been created with  vgcfg-
	      backup.

       See lvm for common options.

REPLACING PHYSICAL VOLUMES

       vgdisplay  --partial  --verbose will show you the UUIDs and sizes of any PVs that are no longer present.  If a PV in the VG is lost and you
       wish to substitute another of the same size, use pvcreate --restorefile filename --uuid uuid (plus additional arguments as appropriate)	to
       initialise  it with the same UUID as the missing PV.  Repeat for all other missing PVs in the VG.  Then use vgcfgrestore --file filename to
       restore the volume group's metadata.

SEE ALSO

       lvm(8), vgcreate(8)

Sistina Software UK					 LVM TOOLS 2.02.67(2) (2010-06-04)					   VGCFGRESTORE(8)
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