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From Jens Alfke <j...@mooseyard.com>
Subject Re: What's the speed(performance) of couchdb?
Date Thu, 26 Feb 2009 17:30:23 GMT

On Feb 25, 2009, at 8:30 PM, Scott Zhang wrote:

> But what a database is for if it is slow?

To store data, of course. And storing it quickly is just one feature.  
As an example, a tape backup system has terrible access time, but is  
still valuable for its vast capacity.

CouchDB has other advantages, like flexibility of storage (no schema  
needed) and its distributed nature. Sure, most DB servers support  
replication, but that's not the same thing. As an example (of the kind  
of thing that interests me) CouchDB could be used to implement a  
database with millions of server nodes all around the world. The nodes  
don't have to have any central organization, or necessarily even trust  
each other. (This is somewhat like the organization of P2P distributed  
hash table systems like Chord, Pastry, etc.) In some ways performance  
would be terrible — data that isn't cached at a local node might take  
seconds or minutes to be fetched from another, and it might take  
minutes or hours for changes made at one node to propagate to all the  
others — but other benefits would compensate.

—Jens
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