CODEWITHSUNDEEP
pythondjangocaching
Martin Spasov
Martin Spasov

Reputation: 313

Caching using Memcached and python-memcache

I installed them both, but i get a None every time i try to get some key

>>from django.core.cache import cache #no errors
>>cache.set('value1','value2',39) #no errors
>>cache.get('value1') #no errors but no value either

in settings.py i got

CACHES = {
'default':{
    'BACKEND':'django.core.cache.backends.memcached.MemcachedCache',
    'LOCATION':'127.0.0.1:1991',
    'TIMEOUT': 1200,
    }
}

what is going on wrong? I don't have even the slightest idea what to debug or where to start ...

Upvotes: 0

Views: 1470

Answers (1)

mhawke
mhawke

Reputation: 87134

Are you sure that memcached is actually running, and that it is configured to listen on 127.0.0.1 port 1991? By default memcached listens on port 11211.

django.core.cache.cache plays dumb when memcache fails to store keys, it doesn't raise an exception or return any error.

You can test more directly with memcache like this:

import memcache

for port in (1991, 11211):
    print "Testing memcached on port %d" % port
    mc = memcache.Client(['127.0.0.1:%d' % port])

    if mc.set('value1', 'value2'):
        print "stored key value pair"
        if mc.get('value1') == 'value2':
            print "successfully retrieved value"
            break
        else:
            print "Failed to retrieve value"
    else:
        print "Failed to store key value pair"

Upvotes: 1

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