Re:Developer Preview: RethinkDB Now Available for Windows
by ssmoot on Friday February 12, 2016 @10:40AM
(#11087933)
CouchDB doesn't do joins, which can impose serious schema design changes depending on your application. map/reduce is done at index time. You wouldn't ever want to do it on the fly.
The base CouchDB also wasn't clustered last I looked (a year ago maybe?); you had to use BigCouch, which was an OSS contribution by Cloudant that lagged both Cloudant's own offering and CouchDB releases. It was supposed to get merged into head though so there's a good chance that actually happened while I wasn't looking.
If you're just looking at CouchDB though and not Cloudant, it's not all that compelling (IMO). No clustering. No integrated search. No transactions. No joins. Pretty shallow server metrics in the dashboard. CouchDB doesn't even really have queries AFAIK. Just index scans.
CouchDB. Older by 6 yrs, so probably can't compete with RethinkDB on wow-yet-another-new-fresh-backed-tool-with-fancy-webpage-and-admin-ui scale ;)
In everthing else couchdb has more features than rethinkDB. And is much more mature, but somehow this word is understood backwards these days. Technology ageism I suppose ;)
p.s. I'm not couchdb dev/supporter etc.