How to get all the keys from memcache using python

Question

I'm trying to find how to get all the keys from memcache but I can not find the answer. I saw some answer codes that using telnet but finally it didn't work. I want to know exactly how to get keys at once, using telnet or other things. It should be done in python.

please tell people what have you done already, such as a code snippet or something, without code snippet your question will not draw attention ad no one will understand your situation correctly I doubt — Inzamam Malik, Jan 22 '20 at 12:13
this is my first post. so I didn't know how to ask efficiently. your advice will help me. thank you for your advice. — sexylee, Jan 23 '20 at 03:57

score 3 · Answer 1 · answered Sep 12 '21 at 03:22

A bit late, but here's how I was able to do it. client is a pymemcached client, ensure_str converts bytes to unicode (six.ensure_str would work):

keys = {}
for key, val in client.stats('items').items():
    _, slab, field = ensure_str(key).split(':')
    if field != 'number' or val == 0:
        continue
    item_request = client.stats('cachedump', slab, str(val + 10))
    for record, details in item_request.items():
        keys[ensure_str(record)] = ensure_str(details)

Ends up with a format as follows:

>>> print('\n'.join(f'{k}: {v}' for k, v in keys.items()))

local/_action/eb4f0b5c-7dcb-457a-ae8a-1aad1aef1ce0: [192 b; 1631502402 s]
local/_action/d7ffc698-0845-4662-8860-6a82877c0672: [192 b; 1631502338 s]
local/_action/8fc360e4-36ed-4474-bc4d-4ecbb4513d17: [201 b; 1631501746 s]
local/_action/7ee34ab4-408e-4bb1-91eb-56e7d6d131bd: [265 b; 1631499358 s]
local/_action/7662cdf4-6eb5-4a1c-b7bf-3d7971db12e6: [330 b; 1631501876 s]

Theory mostly taken from https://stackoverflow.com/a/19562199/4001895

score 0 · Answer 2 · answered Jan 22 '20 at 19:59

0

Having in mind that Memcache acts as dict there is:

cache.get_multi(keys)

As seen on:

https://pymemcache.readthedocs.io/en/latest/apidoc/pymemcache.client.base.html#pymemcache.client.base.Client.get_multi

There is answer how to do this using telnet protocol. As far as I know there are no commands in Python Library for doing the same:

How to export all keys and values from memcached with python-memcache?

answered Jan 22 '20 at 19:59

Milos K

1,009
8
5

I think my question was vague. Exactly, my question was How to get the key[list] from memcache (without keys). so I cannot use the get_multi method because I don't know some keys. that's why I wanna get all the keys from memcache. but I guess the link that you gave me would be helpful. I think I should study more about the 'telnet'. Thanks! – sexylee Jan 23 '20 at 04:05

How to get all the keys from memcache using python

2 Answers2