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We are currently using memcache for storing session data. I have heard that memcached or redis are better. I need to understand what is the difference between them? in order to understand which one is the best choice

Carlos
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Charanjeet Kaur
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    Memcache and memcached in PHP are different extensions to access memcache; while memcache and redis are different key/value caching servers – Mark Baker Oct 17 '13 at 10:30
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    Ses http://stackoverflow.com/questions/1442411/using-memcache-vs-memcached for a comparison between the memcache and memcached extensions – Mark Baker Oct 17 '13 at 10:31
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    See http://stackoverflow.com/questions/10558465/memcache-vs-redis for a comparison between memcache and redis caching servers – Mark Baker Oct 17 '13 at 10:33
  • The answer depends on your use case. What are you storing in Memcache? As for generic differences, you can view the post by @ashiina below. – Manu Manjunath Nov 14 '13 at 07:01

2 Answers2

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This answer explains it very thoroughly. Memcached vs. Redis?

But if you want a simple answer, here it is:

Redis

  • Persistent (your data lives even if your server shuts down/reboots, since it is written to your disk, unlike memcached)
  • Supports lots of data types (list, sets, etc... not just a plain get/set/del like memcached)

Memcached

  • fast
  • easy to use

So basically, if you don't really care about the two big advantages of Redis, you should use memcached.

Community
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ashiina
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For your own use case I'd say Redis is better. Since you're using it to store user session data you probably have the need to perform operations on a single field of the session and for that the Redis hash data type is perfect. You can find a very detailed comparison between them in this article: Redis VS Memcached: Which one to choose?

Cristiano Vicente
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