Pull request for adding hash based redis commands implementation in django-redis

[danish-rehman]

I have added hget, hset, hget_many, hset_many and hincr implementation. Please review it. Thanks.

[danish-rehman]

Hi sebleier,
I have committed the needful code as requested ( test cases + benchmark ). The benchmark clearly signifies the memory usage gain when using hashes. I am currently using it for storing meta data of caches. Please review it and let me know.

Thanks.

[Coalpaw]

Yeah +1 for this, though it should be noted that the maximum number of entries a hash can have while still being encoded efficiently is around 1000 according to this: http://instagram-engineering.tumblr.com/post/12202313862/storing-hundreds-of-millions-of-simple-key-value-pairs

[stanislavshabalin]

I'm not saying no to this

It's 2014, so you kinda do say no.

How does having the redis hash methods add value to django-redis-cache?

Redis backend has this feature, the library does not, so it essentially limits Redis's functionality.

Hashes are useful to decrease cache entries and thus requests to cache drastically.

[atarkowska]

is there any plan to get hash support in at some point or I should write my own? This is huge limitation

[stanislavshabalin]

@aleksandra-tarkowska for what it's worth, we've moved to https://github.com/niwinz/django-redis :-)

[atarkowska]

thx, but I still don't see hset, except raw client ?

[stanislavshabalin]

@aleksandra-tarkowska yup, only raw client. Which does have hset and other stuff: http://redis-py.readthedocs.io/en/latest/
Worked great for me, maybe you could give it a try.