Package Exports

redis-delete-wildcard

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Readme

redis-delete-wildcard

Delete a set of keys from a pattern with wildcard. Operation is done through a lua script, and therefore atomic. It extends standard [node_redis][] library with a new method delwild. [node_redis]: https://github.com/mranney/node_redis

Getting started

Install the module with: npm install redis-delete-wildcard

// Create a redis client
var redis = require('redis');
require('redis-delete-wildcard')(redis); //pass in redis so prototype can be extended
var client = redis.createClient();

// Usage
client.delwild('pattern:*', function(error, numberDeletedKeys) {
    console.log(numberDeletedKeys);
}

Why should I use it?

This method call is atomic and executed by Redis via LUA script.
Foreach loops should be faster in Redis LUA than in Node.
Simple source (check its just 29 lines)
Works great for small datasets, will spare much time in writing array handling code

Why shouldn't?

KEYS command in Redis is not recommended for large sets of data.
unpack() in LUA can give some errors when sets of data are couple of thousand
If you need to delete a part of database, for example delete all cache on application upstart, simpler solution is to partition data by numeric database and use flush/flushdb

Contributing, & @todo list ;)

tests please
make lua script use SCAN instead of KEYS
use SCRIPT LOAD & EVALSHA instead of EVAL