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From Robert Newson <robert.new...@gmail.com>
Subject Re: [jira] Commented: (COUCHDB-583) storing attachments in compressed form and serving them in compressed form if accepted by the client
Date Tue, 26 Jan 2010 17:14:52 GMT
ah, no, I meant the strictly append-only header stuff. Back when there
was a discussion on how to be sure a discovered header was a real
header and not a carefully crafted attachment.

B.

On Tue, Jan 26, 2010 at 5:13 PM, Robert Newson <robert.newson@gmail.com> wrote:
> I vaguely recall this came out when Damien added deterministic revisions?
>
> On Tue, Jan 26, 2010 at 3:28 PM, Filipe David Manana <fdmanana@gmail.com> wrote:
>> Yep, it makes sense.
>>
>> For text files, with a level 8 compression, I've been seeing attachments
>> being reduced to 30-40% of their original size, which is fairly positive :)
>>
>> On Tue, Jan 26, 2010 at 4:25 PM, Paul Davis <paul.joseph.davis@gmail.com>wrote:
>>
>>> > How did you do the tests? Some tool to measure the speed?
>>> > It would be interesting to do the same for the attachments.
>>> > Personally I think that for text mime types, it's generally worth doing
>>> the
>>> > compression.
>>>
>>> They weren't very scientific. Generate a view with and without and
>>> measure the time and file size for each.
>>>
>>> Not at all saying we shouldn't be using it for the attachments. I was
>>> thinking that now that we are doing attachment encoding proper that it
>>> would've been better to turn of the attempt to compress each
>>> compressed chunk because that's just wasted effort. For attachments it
>>> makes much more sense to do it like your patch because of the gzip
>>> dictionaries will run over the stream and not just each chunk written
>>> to disk. If that makes sense?
>>>
>>> Paul
>>>
>>
>>
>>
>> --
>> Filipe David Manana,
>> fdmanana@gmail.com
>> PGP key - http://pgp.mit.edu:11371/pks/lookup?op=get&search=0xC569452B
>>
>> "Reasonable men adapt themselves to the world.
>> Unreasonable men adapt the world to themselves.
>> That's why all progress depends on unreasonable men."
>>
>

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