Re: [Phpwiki-talk] PHP persistent caching

[Dan F. <dfr...@cs...>]

Reini Urban wrote:

> Dan Frankowski schrieb:
>
>> I have a question for experienced PHP developers. There is a lot of 
>> information I can imagine wanting to cache across sessions in PHP. 
>> For example in WikiLens, a ratings database, or per-item statistics 
>> (# ratings, averages, etc). This is stuff that will fit in-memory for 
>> the forseeable future.
>>
>> What's the best way to do that in PHP? I've looked at a couple of 
>> PEAR modules (e.g., "Cache" included in PhpWiki), and they seem to be 
>> file-based. This is astonishing to me. Clearly memory can be 1000 
>> times faster than disk (although there are usually memory-based disk 
>> caches, too). Is it really best to use file-based caches? I thought 
>> about writing a shared memory-based cache, and a colleague warned me 
>> away from it, saying shared memory access in PHP is iffy.
>>
>> Thoughts?
>
>
> Are you aware about our max-size limitation of sessions
> how we are using them?


No, I don't know about this.

> If this could be solved we could put much more into regular sessions
> and wouldn't need external libs, such as
>   http://www.phpclasses.org/browse/package/439.html


Thanks for the ref! This looks like a useful package.

Note that I don't think stuffing the ratings DB (or stats like # rats or 
avg item rating) into each user session will help me. I want it cached 
*across* user sessions, so each user isn't burdened with re-reading, 
re-calculating.

I plan to try the shmem thing.

> I'm running a stable windows server with Turck MMCache for some time 
> now using shmem for the internal bytecode.
>   http://www.apachefriends.org/en/xampp.html


Cool, thanks.

Dan