Hackathon / Multidimensional keys / Wildcard deletes

Paul Querna chip at corelands.com
Sun Jul 8 04:11:24 UTC 2007

Paul Querna wrote:
> Dustin Sallings wrote:
>>     There'd be indexing overhead, but you could have an O(1)
>> invalidation if the tags themselves were versioned.
>>     Assuming the cache time is short or you're accessing these records,
>> cleanup should pretty much take care of itself.
>>     Protocol-wise, would it make sense to have the tags be additional
>> tokens on the mutation line?  i.e.:
>>     <command name> <key> <flags> <exptime> <bytes> [<tag> [...]]\r\n
> Well, it does bring up a wider issue of protocol versioning....
> I was thinking about a more generic structure, if we ever did a protocol
> revamp, something like:
> <command>\n
> <meta>=<string||int>\n
> data=<data>\m
> So, for example a SET today would be like:
> key=foobar
> flags=400
> bytes=1000
> data=...data...

And, thinking about that syntax a little more, we are just reinventing
HTTP, so, why not make memcached's protocol v2 just be HTTP :-) ?


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