Download Scaling CouchDB: Replication, Clustering, and Administration by Bradley Holt PDF

By Bradley Holt

This sensible advisor deals a quick direction on scaling CouchDB to satisfy the potential wishes of your dispensed software. via a sequence of scenario-based examples, this e-book allows you to discover numerous tools for making a procedure that could accommodate development and meet anticipated call for. within the procedure, you find out about a number of instruments that may assist you with replication, load balancing, clustering, and cargo trying out and tracking.

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A client will not receive an indication of write success (201 Created) until this many nodes have successfully written the document. W must be less than or equal to N. If W is less than N, then the remaining writes will still be attempted in the background. ini file, but may be specified using the w query parameter when writing to the database. The default value is 2. R The number needed for a read quorum. A document will not be returned to a client until this many successful reads on different nodes have been made, all with the same revision number.

Com (CouchDB read-only node) servers. com. com without using a password. We will do this using public key authentication, but you could instead use ssh-agent or rsh. com, if it is not already: sudo aptitude install openssh-server Each of your testing clients should use the same username for running tests. Setting up multiple machines will be much easier if the same username is used on each. If you use Erlang-based remote monitoring, create this same username on each server to be monitored as well.

Info Replication Setup CouchDB supports both pull replication and push replication. Pull replication is when replication is triggered from the same node as the target. Push replication is when replication is triggered from the same node as the source. info You may want to set up replication using a separate, private, network so that you can have dedicated bandwidth for private and public requests. Proxy Server Configuration The Apache HTTP server is extremely versatile. 1). 9 in Apache Cookbook, Second Edition (O’Reilly).

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