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Re: using fsck in a lowmem environment

To: Arthur Chance <freebsd@qeng-ho.org>
Subject: Re: using fsck in a lowmem environment
From: Colin Percival <cperciva@tarsnap.com>
Date: Sat, 19 Nov 2011 23:08:31 -0800
Cc: tarsnap-users@tarsnap.com
In-reply-to: <4EC633DD.7020902@qeng-ho.org>
References: <CAAicRrHTyO=TMyfWkbjdWd61eqoiT7THh7NP7dRbCf-qFf0raA@mail.gmail.com> <4EC61F3D.4030104@tarsnap.com> <4EC633DD.7020902@qeng-ho.org>

On 11/18/11 02:30, Arthur Chance wrote:
> On 11/18/11 09:02, Colin Percival wrote:
> [big snip]
>> and most
>> people have more than enough RAM based on the amount of data they're
>> storing.
> 
> Is there a formula for how much RAM is needed for a given amount of backed up data?

It's approximately a 1000:1 ratio of total (deduplicated) data stored to RAM
needed.  It will vary a bit based on the average file size and how efficient
your platform's malloc is.

-- 
Colin Percival
Security Officer, FreeBSD | freebsd.org | The power to serve
Founder / author, Tarsnap | tarsnap.com | Online backups for the truly paranoid

References:
- using fsck in a lowmem environment
  - From: Mark Smith <mark@bumptechnologies.com>
- Re: using fsck in a lowmem environment
  - From: Colin Percival <cperciva@tarsnap.com>
- Re: using fsck in a lowmem environment
  - From: Arthur Chance <freebsd@qeng-ho.org>

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