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bloom-redis
Advanced tools
A bloom filter for node backed by redis.
To install, use npm and run npm install bloom-redis
.
Like mongoose, bloom-redis allows you to specify a single redis client for your filters to connect to. Alternatively, you can give a client to each filter instance.
To use a single redis client, use the bloom.connect
call as shown below:
var redis = require('redis'),
bloom = require('bloom-redis');
var client = redis.createClient();
bloom.connect(client);
filter = new bloom.BloomFilter({ key : 'mykey' });
You may also pass in the client to the filter explicitly
filter = new bloom.BloomFilter({ client : otherClient,
key : 'otherKey' });
Filters take the following options:
connect
or explicit passfilter.add(string, [callback]);
filter.contains(string, callback);
filter.clear([callback]);
Currently md5
is used as the hash function and is seeded with different values. It has good collision resistancy against a random dataset. However, it generates far more bits than we actually need, and may not be as fast as other hash functions.
For more info on Bloom filters, you can read these excellent resources:
FAQs
a simple redis-backed bloom-filter
We found that bloom-redis demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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