Re: [Networker] How much browse time for three months?

2004-12-01 21:01:27
Subject: Re: [Networker] How much browse time for three months?
From: Darren Dunham <ddunham AT TAOS DOT COM>
Date: Wed, 1 Dec 2004 18:00:55 -0800
> For certain groups, I have a schedule that calls for running a level
> full at the end of the first week of each quarter: Jan, Apr, Jul, Oct
> and incrementals and level backups at all other times, typically three
> weeks of incrementals, followed by a lower level backup at the end of
> the third week like 5, 4, 3, etc. each month until hitting the full
> again. I never schedule a level backup the week before a full, though,
> so there might be a strech where there's 4 contiguous weeks of
> incrementals, followed by the full.

Okay.  So that full is necessary for restoration of data within that
entire time period (3 months).  Depending on the rate of change in your
environment, you might consider cloning the full to prevent a bad day if
a tape fails.

> Can I get by with a 2month browse policy on the clients since I thought
> it went one cycle beyond that to previous full?

Take the last incremental before a full.  You're specifying that it
needs to be recoverable 2 months after it was made.  If you do that,
then not only does it have to be around, but the Full that supports that
cycle has to be around.  So you'll have about 3 months (total cycle)
plus 2 months (browse) for a total of 5 months in the indexes.

> At what point does information in the index get truncated? I thought, in
> this case, it would be at least anything older than 2 months plus one
> cycle. I want to make sure that fulls are not forced because NetWorker
> can't figure out how to do an incremental or level since it deleted the
> previous full info?

It won't delete the previous full until everything that depends on it
also expires.

Darren Dunham                                           ddunham AT taos DOT com
Senior Technical Consultant         TAOS  
Got some Dr Pepper?                           San Francisco, CA bay area
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