CouchDB is a document database that uses JSON documents and handles replication of data across a distributed system. It supports views generated with JavaScript MapReduce that allow querying like SQL SELECT statements. CouchDB provides pagination of view results both slowly using skip and limit parameters, and faster using startdoc and limit. The document discusses using CouchDB alongside a distributed proxy server to store and query access logs.

1. CouchDB
(replicated data store for distributed
proxy server)
@tkramar

2. Distributed proxy server
● Manipulates
● request/response headers/bodies
● Recommend new pages based on browsing
patterns
● Insert new search results based on what similar
users found relevant
● Your next idea..

3. We want..
● .. to have multiple proxies
● localization services
● high availability

5. CouchDB
● Document database
● JSON
● _id
● _rev

7. Views
● JavaScript MapReduce
● “SELECT”, “JOIN”
● B-tree
● persistent

8. Pagination
● Slow
● skip, limit
● http://127.0.0.1:5984/proxy/_design/access_logs/_vi
ew/by-user-and-timestamp?limit=5&skip=5
● Fast
● startdoc, limit
● http://127.0.0.1:5984/proxy/_design/access_logs/_vi
ew/by-user-and-timestamp?startkey=3456&skip=5

9. ● http://guide.couchdb.org/index.html