Per Jessen wrote:
Stut wrote:
There's no question of locking users to particular machines, nor of
uneven distribution. LVS will distribute evenly or according to
weights.
Indeed, but you must see that making the decision of which server to
use per request will result in a more even distribution than deciding
once per session.
You might see a somewhat uneven distribution if you only have a small
number of machines, but the resources you're saving by not having
memcached replicate objects will now be available for that slightly
less even distribution.
I'm not sure what you mean by "replicate objects".
Having said that I don't see a problem with depending on a particular
piece of software as a dependency of the application. Your app already
requires PHP, and most likely requires a bunch of extensions to be
present so I don't see a major problem in adding memcache to that
list, especially if it means you can use it much more efficiently by
assuming it's available.
My personal choice would be not to have my application deal directly
with caching, but that's mostly a matter of choice.
Abstraction is great but where scalability is needed it can prove to be
horribly inefficient, but as you say it's a matter of choice.
-Stut
--
http://stut.net/
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
