Mailing-List: contact user-help@couchdb.apache.org; run by ezmlm
Precedence: bulk
Reply-To: user@couchdb.apache.org
Received-SPF: neutral (athena.apache.org: local policy)
MIME-Version: 1.0
In-Reply-To: 
 <CAHdjip+Uo4C4TJnaxpH4TyKgU-4jv3qauch4jGgCXBX8X_d4EA@mail.gmail.com>
References: 
 <CAAOi-OFMhQ0X3iEUC6T0fSdwJLV20Huj4tnJZBSfZ5Q5TtEx7g@mail.gmail.com>
 <CAN-3CBK4OQ5jJDa3ojfxkt=nN0OVpX8JnFUp21-AkgJzLTtN5g@mail.gmail.com>
 <CAAOi-OFWeYtZbLfLbsUV9Egk3j6kFtVa2t9urZu95KH3buLJdw@mail.gmail.com>
 <CAMiZLn07ru9fUgxsmtCsT2rG8ShfRrD=1bpLRN-f1YGG8athTA@mail.gmail.com>
 <CAAOi-OGEvWZrEkDyrxr1W0FKmA=Feso=smesQYU9_joARtSiqQ@mail.gmail.com>
 <CAN-3CBK3SCx7Y5K1oEC+XfzgY2B+-9_0c90m6npM9GkE_myu0g@mail.gmail.com>
 <003240CB-2132-439B-AD7D-6AFBB00DA352@apache.org>
 <CAAOi-OHiVWDuAM4DUjd1q7R7voNmC5Y7uCPziC8=1DHsAU27TA@mail.gmail.com>
 <CABvT1DH440h0CAmdpHd-o0bgpjiojGvQMnROfjChpSVb=47dTQ@mail.gmail.com>
 <CAAOi-OFZ2uXhfKyL9ROwki+43ccO_MGFA9Z5TTPPYuAoAcU5CQ@mail.gmail.com>
 <CABvT1DG4G32p9fc164OdLyCDh37-E8jXzkaF5GdNXECh3tENtw@mail.gmail.com>
 <CAHdjipJZtAvY5kO6ot_-FnFG3NxKVgUoeiUCsnbAbVEr3zhnVA@mail.gmail.com>
 <CABvT1DEEbepPVf_OqnWiC4aSTBNZF4K++1GYGPhUC7RbqpS1Tw@mail.gmail.com>
 <CAAOi-OFME8=EQ1hng+S2ypqtKeWS6D-vV-1YZ_LSs052tKBPLA@mail.gmail.com>
 <CAHdjip+Uo4C4TJnaxpH4TyKgU-4jv3qauch4jGgCXBX8X_d4EA@mail.gmail.com>
From: Daniel Gonzalez <gonvaled@gonvaled.com>
Date: Fri, 16 Mar 2012 17:19:29 +0100
Message-ID: 
 <CAAOi-OHN6PpcLHJ-+Wvhev_sKMZNGW20iuK2LxJ22tCQwtqB=g@mail.gmail.com>
Subject: Re: Size of couchdb documents
To: user@couchdb.apache.org
Content-Type: text/plain; charset=ISO-8859-1

On Fri, Mar 16, 2012 at 5:03 PM, Alexander Shorin <kxepal@gmail.com> wrote:
> Daniel,
>
> Since you're using Python, have you played with uuid.uuid1 function?
> It produce semi-sequential host-based uuids. To make them really
> sequential, probably you'd like to reverse uuid value because his
> "head" changes often than "tail". This trick could be cheaper that
> implementing erlang-friendly base64 encoding.
>
> --
> ,,,^..^,,,

Thanks Alexander, but that won't do. The main requirement to keep
performance and size low is to have a really short document_id. With
base64 you can number 16 millions of documents with just 4 characters,
and over 1 thousand million documents with 5 characters. The number of
characters in the doc_id is really a critical parameter when dealing
with lots of documents.