Memcached

[Jason B]

On 23/12/2006, at 6:52 PM, Igor Sysoev wrote:

> On Sat, 23 Dec 2006, Jason B wrote:
>
>> On 22/12/2006, at 12:21 AM, Igor Sysoev wrote:
>>
>> Thanks for the reply Igor
>>
>> Is it possible to ask Nginx to look in Memcached, but if not found  
>> to look on the local filesystem before passing to the backend?
>>
>> That would make things more efficient?
>
> Yes, it's possible, but it would not be more efficient.
>
> Sending file from local file system is most efficient way if kernel VM
> have cached that file: then sendfile() will be zero-copy operation:
> you save memory and CPU.
>
> Working with memcached or backend requires
> 1) copy operations to kernel by memcached or backend,
> 2) then copy operations from kernel by nginx,
> 2) then copy operations to kernel by nginx
>
> If memcached or backend are on the same computer as nginx, then
> all these operations involve context switches between nginx and  
> memcached
> or backend.
>
>
> Igor Sysoev
> http://sysoev.ru/en/
>

Ah, thanks Igor.  Please pardon my ignorance :)

Loving Nginx more and more.

Jason