[Deceptor]

@rajubd - You'd have to test, I'm not 100% sure. If it doesn't, I'd recommend using Memcache personally over APC.

@Super Jinni
1. XCache stores data in ram, not in the file system. We don't require any connection settings to XCache so it doesn't have to be filled in the config.php - however Memcached requires IP/port settings, plus you can have multiple memcached servers so we require you fill those settings within config.php for vBO to fetch and use them for connection. In either case, the datastore is not linked to vBO in anyway, vbulletin has a folder for its datastore but that is only used if you set the datastore to use file cache within config.php

2. You can use 2 systems if you want, though I'd recommend using the same so runtime doesn't require the use of using 2 extensions for cache - just the 1.

3. No conflicts using both, just might use a little extra runtime memory/processing

4. As said XCache stores data in ram

5. Only way you can change data stored in xcache is through their API functions like xcache_get() and xcache_set().

Let me know if you have any further questions