What is a valid key?

Kieran Benton kieran.benton at synchro.co.uk
Thu Dec 20 18:14:04 UTC 2007

No I don't think so :)

But it is very convenient to just have to not worry about falling foul
of not supported characters in keys. Its obviously an easy matter if you
are building a site that is for use with memcached from the start, but
if you are moving to memcached from another cache system (as I am) then
it is a bit of a worry if delimiters you have previously been using
might now be treated as erroneous.

Are we saying that as long as you use UTF-8 for the key, and that it is
not longer that 250 bytes, then all is fine with both text and binary
protocols? If so then I think we should update the docs to say so and be
happy :)

- Kieran

-----Original Message-----
From: memcached-bounces at lists.danga.com
[mailto:memcached-bounces at lists.danga.com] On Behalf Of Dustin Sallings
Sent: 20 December 2007 17:58
To: a.
Cc: memcached at lists.danga.com
Subject: Re: What is a valid key?

On Dec 20, 2007, at 8:57, a. wrote:

> I haven't seen the server from inside (I only wrote a client), so  
> maybe it's anoob question, but
> why do we have to treat the key as a "string"? Cannot be just  
> treated as an array of bytes (whihc cannot contain some values  
> listed earlier)? So we do not have to care about codepages and  
> encodings and such?

	You could do that in the server using the binary protocol, but
text protocol wouldn't be able to deal with it.  It'd be good to  
remain limited to the lowest common denominator.

	I don't think anyone *really* cares about being able to use a
jpeg as  
a key.

Dustin Sallings

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