mdelete and Cache::Memcached::delete_multi()

[Timo Ewalds]

Tomash Brechko wrote:
> On Tue, Nov 13, 2007 at 17:52:31 -0800, Brian Aker wrote:
>   
>> Is there a benchmark showing that the multi delete performs multi key  
>> delete any faster then issuing single delete commands?
>>     
> None that I know about ;).  But you may experiment with mdelete.t in
> the server, or 05_delete_multi.t in the Perl module.
>
> I have no doubts it will outperform single deletes because of the
> latency of waiting the reply before sending the next command.  More
> interesting would be to compare it to streamed delete, like the one
> that Marc is willing to share, but not yet.
>   
It's not that hard to add multi-delete to the current clients with the 
existing protocol. You can just pipeline the commands, sending all the 
deletes, then reading all the responses. It means there is "\r\ndelete " 
between each key instead of just " ". It may be slightly more cpu 
intensive, but compared to the network latency saved, the extra cpu time 
will be utterly insignificant.

Timo
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