Re: Pear::Cache lock files

Hello, Thomas Chille wrote: > > Hi, > > i'm new here and have one little question: > > i read that some problems could occurs if i use files > to store the cached data, cause the files will not be > locked while writing access. > if there any plans to implement that or is that problem > not so hard for middlesized websites ? Yes, PEAR Cache file container class does not assure mutual exclusion when updating a cache file. That can be a problem for sites of any size, but in sites with greater audience the probablity of cache data corruption is higher. You may want to take a look at this other file cache class that uses PHP file locks to assure mutual exclusing when the cache file is being updated. http://phpclasses.upperdesign.com/browse.html/package/313/ I understand that there are some issues with Windows that seem to not handle file locks the same way and also with multi-threaded Web servers like Apache 2, even on Unix/Linux like systems because it seems that PHP file locks are process wide. If that is really an issue I think that the locking may not work well because two threads of the same process may be able to concurrently write to the same locked cache file. Anyway, the file cache class above works well on Linux and Solaris with Apache 1.x because I use it extensively in that same site that is always very busy. Regards, Manuel Lemos