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From: Monica Razdan <monica@almende.org>
Subject: Re: Caching in BigCouch
Date: Tue, 20 Sep 2011 22:46:54 +0200
To: "user@couchdb.apache.org" <user@couchdb.apache.org>

Julien thanks for your reply. Your experience helps me to reflect back on my=
 use case.

Robert, I'm investigating the possibilities of scaling couchdb using  BigCou=
ch. However, I haven't been able to find documents or resources about the pe=
rformance and scaling benchmarks?=20

Svein,=20
Thanks for your post! I'm investigating couchbase server as well at this mom=
ent.

Has anyone ran some performance and/or scaling test on bigCouch or Couchbase=
 server?=20


On Tue, Sep 20, 2011 at 9:40 AM, Julien Gagnet <julien.gagnet@gmail.com> wro=
te:
> No. Couchdb and Bigcouch don't provide any caching. It relies on disk cach=
ing.
>=20
> So even if you see the couch process taking little memory, that
> doesn't mean you won't get any improvement in adding more memory to
> the box. The disk cache use a sophisticated LRU algorithm and should
> provide what you're after. We recently were hitted by a performance
> issue and using local disk wasn't an option, we've been able to
> increase the memory up to a point where most of the db fit in the disk
> caching and solve our problem.
>=20
> Julien
>=20
> On 19 September 2011 22:15, Monica Razdan <monica@almende.org> wrote:
>>=20
>> I'm my quest to find clustering for  couchdb using hadoop I stumbled upon=
 this blog
>>=20
>> http://mpouttuclarke.wordpress.com/2011/01/04/couchdb-and-hadoop/
>>=20
>> The author mentions here about LRU caching being used by hadoop.  I have a=
 huge dataset sorted on timestamp and caching on timestamp like LRU would be=
 important for my use case. Does bigCouch offers such mechanism under it's h=
ood ?
>>=20
>> Monica
>>=20
>>=20
>>=20
>> On Sep 19, 2011, at 10:43 PM, Robert Newson <robert.newson@gmail.com> wro=
te:
>>=20
>>> What do you mean by 'caching' here?
>>>=20
>>> On 19 September 2011 21:36, Monica Razdan <monica@almende.org> wrote:
>>>> Hello,
>>>>=20
>>>> I wanted to compare the caching mechanism used in Hadoop - LRU with
>>>> the caching in BigCouch. However, I couldn't find details about
>>>> underlying caching algorithm used in Bigcouch. Could someone please
>>>> direct me to the right resource?
>>>>=20
>>>> Thanks,
>>>> monica
>>>>=20
>=20