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new file system CASC

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MR. Farrare:
blizzard will not be using the MPQ anymore they changed to fromate called CASC for more go to http://us.battle.net/wow/en/blog/136454 ... s-4-3-2014 :x  :x  :x  :x  :x  :x  :x  :x  :x

schlumpf:
This is already used in heroes of the storm. Chaud et al already are able to read from those files at least. Format can't be too complex. Missing tools will be the bigger problem in modifying WoD.

TheBuG:
Since it's able to push updates etc without even notifying the user and if it's able to repair itself, then it might cause quite the issue for people playing on private servers (if there is ever going to be a stable server core).

But reading/extracting shouldn't be too hard as Schlumpf said. But as with Cataclysm and Mists of Pandaria it's more likely going to be the lack of tools to support those versions that's going to be an issue.

schlumpf:
After some communication, as far as I know the current state on CASC files is

* reading is completely possible
* listfiles, i.e. filenames are currently not properly available -> you can extract files but don't know what file they are
* writing is not even tried
Being able to push into them is nothing I think that would be a problem with private servers. As the server is emulated, it most likely won't push/repair the clients archives magically. (just like stuff like warden is not active on emulated servers; even less blizzard being able to push stuff to warden when playing on a private server)

stoneharry:
In the article they mention that the new file system is a lot faster. Can anyone explain why? MPQ already works via hashtable as far as I am aware which is always O(1) since the time to access is always the same? How can you get faster than that?

My knowledge on this is rather limited but I want to learn more.

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