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From "Samuel Williams (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (COUCHDB-1743) Make the view server & protocol faster
Date Fri, 03 May 2013 14:00:20 GMT

    [ https://issues.apache.org/jira/browse/COUCHDB-1743?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13648423#comment-13648423
] 

Samuel Williams commented on COUCHDB-1743:
------------------------------------------

Benoit, I wanted to add briefly, as I believe we have already discussed this, but it may be
fundamentally impossible to improve the serialisation/view server communication structure
except by migrating to a completely different architecture, e.g. perhaps a shared memory design,
or loadable module design. 

For example, it might be possible to load executable map/reduce/design document code directly
into the CouchDB process and then have it accept whatever in-memory representation of the
document as an argument. 

Another option I briefly considered was to use shared memory regions to reduce serialisation
overhead. Rather than passing complete documents, we could pass a memory mapped descriptor
to the child process and use this for communication. However, the actual protocol would remain
the same, it might just reduce the issues relating to encoding - we really need some way to
benchmark the overhead added by encoding.

Hence, the extensions field in the proposed protocol - it should be possible to implement
special extensions, for e.g. shared memory regions. But, these approaches wouldn't be universally
supported.
                
> Make the view server & protocol faster
> --------------------------------------
>
>                 Key: COUCHDB-1743
>                 URL: https://issues.apache.org/jira/browse/COUCHDB-1743
>             Project: CouchDB
>          Issue Type: Improvement
>            Reporter: Dave Cottlehuber
>              Labels: couchdb, erlang, gsoc2013, html, javascript, nodejs, rest
>
> View server protocol enhancements/refactoring - unix sockets, pipelining, different wire
format etc. Faster!!

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