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Subject: Re: Curious: will CouchDB ever allow live code updates?
From: Adam Kocoloski <kocolosk@apache.org>
In-Reply-To: <AANLkTinpsKFegQOV3D8z3jRa99=s=U+odGsFKL743dDz@mail.gmail.com>
Date: Mon, 13 Sep 2010 12:10:04 -0400
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 <AANLkTinpsKFegQOV3D8z3jRa99=s=U+odGsFKL743dDz@mail.gmail.com>
To: user@couchdb.apache.org

Yes, BigCouch patched a few things to make hot code reloading less =
painful.  To make this work for some modules in vanilla CouchDB you =
really only need a way to tell the system to reload a module.  It could =
be an HTTP handler that does this, or you could run a named Erlang node =
by hacking the startup script and connecting to it via a remsh.

Adam

On Sep 13, 2010, at 11:49 AM, Paul Davis wrote:

> Its already possible. There are a couple known spots in trunk that
> tend to barf on code reloading. IIUC, BigCouch comes with a couple
> patches for some of these issues. If you find any others, feel free to
> open issues in JIRA.
>=20
> HTH,
> Paul Davis
>=20
> On Mon, Sep 13, 2010 at 8:19 AM, Wout Mertens <wmertens@cisco.com> =
wrote:
>> Hi,
>>=20
>> one of the benefits of Erlang is that you can upgrade your code while =
it's still running. CouchDB's MVCC should help with that as well.
>>=20
>> So I wonder: Will CouchDB ever make use of that Erlang feature?
>>=20
>> Wout.