What about doing forest backups instead? Would I need to stagger them so they
are not overlapping?

-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Wayne Feick
Sent: Saturday, May 31, 2014 2:43 PM
To: [email protected]
Subject: Re: [MarkLogic Dev General] Backup question

If you are doing a database backup, changing the number of forests shouldn't
change anything.

The size of a backup is the size of the database itself; our storage format is
already very compressed, so no additional compression can be done as part of the
backup. The one difference is that we don't backup up the journal files
themselves, so there is a little bit of space saving there.

You don't mention whether you're doing a one off backup, or a scheduled backup.
For a scheduled backup, you configure the number of backups you want to retain,
and need space for N+1 backups because we won't remove the oldest one until the
current one completes.

Wayne.


On 05/31/2014 07:26 AM, Tim wrote:
> Hi Folks,
>
> I have question about backups. We have a fairly large database (which 
> is currently using only one forest) and are running out of space when 
> performing backups.  I do not understand the backup process very well 
> and I don't know if it is just a matter of running out of space or if 
> it has to do with performing concurrent backups and the size of any given
forest that is being backed up.
> Could splitting the database up into multiple smaller forests fix the problem?
>
> The error log merely tells me that there is insufficient space 
> available, but I don't know how to measure that - in other words is 
> there a rule for calculate the necessary disk space based on the 
> database size and any degree of compression? Is it impacted by concurrent
backups?
>
> Thanks for any help with this!
>
> Tim Meagher
>
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--
Wayne Feick
Principal Engineer
MarkLogic Corporation
[email protected]
Phone: +1 650 655 2378
www.marklogic.com

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