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From Jan Lehnardt <...@apache.org>
Subject Re: How do CouchApps fit into the CouchDB story? (Was: CouchDB Articles, Pills and Tutorials Ideas)
Date Wed, 06 May 2015 18:07:16 GMT

> On 06 May 2015, at 19:47, ermouth <ermouth@gmail.com> wrote:
> 
>>> 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

Sure, but how is that conceptually different?

> 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)

Same in CouchDB, really.

—

Either way, you *have* to agree that having binary attachments is not
*THE* defining feature of CouchDB.

Best
Jan
--


> 
> 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/
>> 
>> 

-- 
Professional Support for Apache CouchDB:
http://www.neighbourhood.ie/couchdb-support/


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