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From Nitin Borwankar <>
Subject Re: migrating data from a previous couch version
Date Sun, 24 May 2009 17:02:52 GMT
Paul Davis wrote:
> Nitin,
> There's some info on how to upgrade on the wiki at [1] and [2]. If
> your 0.9aXXXXXX version has XXXXXX < 753448 you'll need to use the
> Ruby script at [2]. Otherwise you should be able to use couchdb-dump
> and couchdb-load from couchdb-python or run two couchdb nodes and
> replicate from the old version to the new version. If you're two
> versions span that commit then you must use the Ruby script because
> replication changes as well.
> Paul Davis

Hi Paul,

Thanks much for those links and I hope to get to the point where I can 
use them.  Currenty I only have my data in files with
a) no older couch instance running and what's worse,
b) no idea what version I was running in my old couch, although I know 
it was a 0.9a<something> from trunk.

so I guess my question becomes

a) how do I know just from the database binary files what exact couch 
version created them   - is there some util or a specific set of bytes 
in the header or
some voodoo that I can use and then I can go install that specific couch 
version from src.  Then use the database dump/load scripts.

> [1]
> [2]
> On Sun, May 24, 2009 at 5:13 AM, Nitin Borwankar <> wrote:
>> Hi guys,
>> This a rather strange situation but I need to get out of it :-)
>> I had a few Gig of data in a 0.9axxxxxx version.
>> I wanted to upgrade couch to 0.9 tarball when it was released.
>> I wasn't sure how it would go so I made a filesystem level backup of the
>> data directories.
>> Then when 0.9 installed and was running fine I copied one of the databases
>> from the old backed up dir to the new 0.9 couch's data dir.
>> I got a "bad version" error from which I gather that the older version data
>> is somehow not binary compatible with the newer one.
>> I don't have a running older version couch - and it was installed from src
>> anyway and I have no idea what minor rev of 0.9a it was.
>> So how do I recover the old data from my files and upload it to the new
>> version.
>> Any ideas ?
>> There's a lot of data in there and I absolutely need to get it out - help!
>> Nitin
>> 37% of all statistics are made up on the spot
>> -------------------------------------------------------------------------------------
>> Nitin Borwankar

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