memcached debate

Perrin Harkins perrin at
Fri Apr 20 02:25:30 UTC 2007

On 4/19/07, andrew at <andrew at> wrote:
> Would it be possible to then use this distributed memory cache as if
> it were internal memory and access each key many many times.  Say,
> like 500 key hits every second.  Or, would network latency make this
> impractical?

Are you asking if it will be as fast an in-memory access to the data?
No, it won't.  It's using TCP sockets across a network.  If your
application depends on getting the kind of speed you have with
in-memory access, then memcached alone will not be enough for you.  I
don't think it's possible to come close to the speed of in-process
access with an external cache.

- Perrin

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