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Message from discussion MogileFS::Server 2.60 going up (checksum support!)
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dormando  
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 More options Mar 30 2012, 6:38 pm
From: dormando <dorma...@rydia.net>
Date: Fri, 30 Mar 2012 15:38:53 -0700 (PDT)
Local: Fri, Mar 30 2012 6:38 pm
Subject: Re: MogileFS::Server 2.60 going up (checksum support!)
Looks like he posted some preliminary documentation:

http://code.google.com/p/mogilefs/wiki/Checksums

I hope he doesn't mind me linking it here :P May be slightly inaccurate or
otherwise missing data.

On Fri, 30 Mar 2012, dormando wrote:
> Yo,

> MogileFS::Client 1.16, MogileFS::Utils 2.23, and ::Server 2.60 are going
> up to CPAN right now.

> 2.60 is the "checksums" release, which Eric Wong has gracefully
> contributed to the project. Tirelessly prodding at it since... november I
> think :)

> I've spent some time hacking at it as well, but please be wary as with all
> new batches of code.

> For the next few releases, we reserve the right to make significant
> changes to the checksums code, or how it operates. We want to hear your
> feedback on its functionality and if it is flexible enough for your uses.

> There is some preliminary documentation in docs/checksums.txt. Eric will
> be posting a wiki page when he gets back (I hope!).

> The one thing worth noting that's not in the file is the "fsck_checksum"
> option:

> $ mogadm settings set fsck_checksum [off|class|MD5]

> If set to "off", it will force fsck to not test checksums even if they are
> specified in a class.

> If set to "MD5', FSCK will compare checksums on all files even if you
> store none in your database. If you wish to evluate the checksums feature,
> this is a great way to take a look. It will log errors about any
> inconsistencies with the checksums of your stored files. If you find
> enough, maybe consider enabling it via the class.

> Checksums adds a new table, so will store one extra row of information per
> fid stored in the database. This may be too difficult for many users, so
> the feature is by all means optional. If not enabled, it does not store
> any extra data.

> have fun,
> -Dormando


 
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