how do I return all memcached values in Google App Engine?

Question

I want to use all the data in my python app engine memcache. I do not know the keys in advance.

How do I go about getting all data?

There does not seem to be a way to list all known keys. Why would you want to do that? — mahmoud, Aug 31 '10 at 18:03
static data loaded via cron once a day. Thinking about it, I could just pack it all into a list and give it a known key... — citronic, Aug 31 '10 at 18:08
The data in memcached isn't guaranteed to stick around. You are better off using a processor prior to the request handler to load/store the info (assuming you are using a toolkit that supports it) — Matt, Mar 02 '11 at 18:56
I posted an alternative way to list the keys via telnet over on a [similar question](http://stackoverflow.com/questions/3611830/how-do-i-return-all-memcached-values-in-google-app-engine): http://stackoverflow.com/questions/3611830/how-do-i-return-all-memcached-values-in-google-app-engine — rootsmith, Mar 02 '11 at 18:45

systempuntoout · Accepted Answer · 2010-08-31T18:21:51.823

4

The only read functions available on memcache are:

get(key, namespace=None)

get_multi(keys, key_prefix='', namespace=None)

As you can see, to get data from memcache you must provide one or more keys.

edited Aug 31 '10 at 18:21

answered Aug 31 '10 at 18:06

systempuntoout

score 1 · Answer 2 · answered Dec 24 '10 at 06:28

1

I am using a 'well known key' called "config" where I store a list of all other keys and use that to enumerate the rest of the items.

answered Dec 24 '10 at 06:28

vivekv

score 0 · Answer 3 · answered Aug 31 '10 at 18:09

0

as in comments above, I guess I could stick all data in a single memcache entry with a known key.

Still for non-static data there are scenarios where it would be useful.

answered Aug 31 '10 at 18:09

citronic

3 Answers3