[TYPO3-performance] Scaling TYPO3 horizontally

[Philipp Gampe]

Hi Robert,

Robert Wildling wrote:

> Can somebody let me (being a newbie on this sector) know, whether it makes
> sense / is possible to use Redis and Varnish at the same time? Would Redis
> help make the BE faster / more stable?

It will not be more stable ;)
But you can use redis as in-memory cache for TYPO3 if you configure it as 
the cache backend for the various (non-PHP) caches. This can give you a 
significant speed gain.

> Does it influence the FE output in
> case there is Varnish (I suppose not, since Varnish holds its own cache,
> right)?

Well, Varnish holds all content in a cache, therefore you need to configure 
it right in order to not get problems if you use any kind of condition (FE 
User!!!) in your page, that alter the page output for the same URL.
Of course you can solve this by configuration, but you need to keep this in 
mind.
Second problem is cache invalidation. You will need to install an extensions 
that flushes the cache after changing any page/content/record in TYPO3. 
Doing it right (not flushing too much, but all that is needed) can be 
challenge and depends on your needs.

Best regards
-- 
Philipp Gampe – PGP-Key 0AD96065 – TYPO3 UG Bonn/Köln
Documentation – Active contributor TYPO3 CMS
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