Testing storage of millions of keys in Redis http://instagram-engineering.tumblr.com/post/12202313862/storing-hundreds-of-millions-of-simple-key-value-pairs # major changes - removed pylibmc dependency

redis-string-or-hash-insert.py

#! /usr/bin/env python

import redis
import random
import sys

r = redis.Redis(host = 'localhost', port = 6379)

REDIS_SETGET = False
REDIS_HSET = False

NUM_ENTRIES = 1000000
MAX_VAL = 12000000
BUCKET_SIZE = 500

if len(sys.argv) != 2 or sys.argv[1] not in ('redis-normal', 'redis-hashes'):
    print 'Specify a test: redis-normal, redis-hashes'
    print 'NOTE: clear out Redis (FLUSHALL) before running'
    sys.exit(2)
if sys.argv[1] == 'redis-normal':
    REDIS_SETGET = True
elif sys.argv[1] == 'redis-hashes':
    REDIS_HSET = True

# get size
size = int(r.info()['used_memory'])

print '%s bytes, %s MB' % (size, size / 1024 / 1024)

p = r.pipeline()
for i in range(0, NUM_ENTRIES):
    value = random.randint(0, MAX_VAL)
    if REDIS_SETGET:
        r.set(i, value)
    elif REDIS_HSET:
        bucket, field = divmod(i, BUCKET_SIZE)
        p.hset(bucket, field, value)

    if i % (NUM_ENTRIES/10) == 0:
        if REDIS_SETGET or REDIS_HSET:
            p.execute()
            p = r.pipeline()
        print i

# one final clear out
p.execute()

# get size
size = int(r.info()['used_memory'])

print '%s bytes, %s MB' % (size, size / 1024 / 1024)