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From ermouth <ermo...@gmail.com>
Subject Re: How do CouchApps fit into the CouchDB story? (Was: CouchDB Articles, Pills and Tutorials Ideas)
Date Wed, 06 May 2015 17:47:28 GMT
>> Imho replication with attachments – typed blobs – is main feature.
> This makes no sense. Riak has that too.

No, it does not.

1) Typed blobs in Riak are just objects, not attachments to objects
2) They have limits – blobs larger than 50Mb are not recommended (in real
life I‘d say reasonable limit for Riak blob is about 10-20 Mb)

We see now that nearly any kind of complex OS ‘document’ – I mean files –
is a container, that encloses several resources and meta, describing how to
glue them together.

So nowadays documents, that are represented using files, are often
containers – but for most databases DB records in general are not. The only
exeption is CouchDB – and this feature is unique as far as I know.

Overhead you gain trying to glue several objects in one entity is generally
enormous. Replicating these entities is a challenge – but not with CouchDB.

For my clients I demonstrate this difference comparing ‘file’ and ‘email’.
(‘Just imagine you need to send new email for every attach, bla-bla-bla’).
Anyone even technically dumb catches difference in a second.


ermouth

2015-05-06 20:15 GMT+03:00 Jan Lehnardt <jan@apache.org>:

>
> > On 06 May 2015, at 19:03, ermouth <ermouth@gmail.com> wrote:
> >
> >>> CouchDB’s core feature is geographically distributed replication.
> >
> >> Really?  That's the argument that lead to CouchBase.
> >
> > I think Jan just forgot to say ‘with attachments’. Attachments are really
> > important, if CouchDB had no attachments, I‘d better use couchbase.
> >
> > Imho replication with attachments – typed blobs – is main feature. Not
> > replication per se.
>
> This makes no sense. Riak has that too. Replication is *THE* defining
> feature of CouchDB.
>
> Not any single person’s pet feature (mine happens to be the _changes
> feed).
>
> Best
> Jan
> --
>
> >
> > ermouth
>
> --
> Professional Support for Apache CouchDB:
> http://www.neighbourhood.ie/couchdb-support/
>
>

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