Re: Server-Wide Persistent objects in PHP?

Question for you, when you serialize to a file do the class definitions get serialized along with it or do you have to pre-load your classes before you can unserialize? (that seems to be the way it works but I may be mistaken). -- Yermo On Mon, 26 Nov 2001, Andrey Hristov wrote: > AFAIK PHP4 is better than PHP3 in that it makes some level of compilation. > You may be serialize - de~ in files. If you use *nix you can choose to work with > SysV semaphores and SysVShm (shared memory). Everything is in memory from one to another script > invocation. > So far I've seen only one script(system) which uses this capabilities of PHP. It's > name is Oasis (oasis.sourceforge.net). > In my tests its 3x-4x faster than analogous systems. > For session data configure in your php.ini to use 'mm' instead of file for data > storage. > > Best regards, > Andrey Hristov > IcyGEN Corporation > http://www.icygen.com > BALANCED SOLUTIONS > > > ----- Original Message ----- > From: "Yermo M. Lamers" <yml@yml.com> > To: "Benjamin Barringer" <bbarringer@infistar.com> > Cc: <php-dev@lists.php.net> > Sent: Monday, November 26, 2001 7:03 PM > Subject: Re: [PHP-DEV] Server-Wide Persistent objects in PHP? > > > > > > Serializing to a file for a large number of objects isn't the correct > > solution. For smaller projects it might be. > > > > The ideal (e.g. correct) solution is to have a server global scope which > > never disappears. Something like a $SERVER_GLOBALS[] array or some such. > > > > For instance, it would be extremely cool to pre-load class files when the > > server loads so you don't have to incur that overhead. It would be > > extremely cool to instantiate objects at server start time and just have > > them available ... basically making PHP have some mod_perl's capabilities. > > > > I had looked at serializing, but if I understand correctly before you can > > unserialize them back you have to load all the class files again ... which > > in my case means 1000's of lines of code each time ... > > > > in my situation I'm running a system that has to load, compile and run > > 4-5 thousand lines of code .... and that's just to /construct/ the > > objects. I'd like to do that once at server load time and then not again. > > > > -- Yermo > > > > > > On Mon, 26 Nov 2001, Benjamin Barringer wrote: > > > > > Why don't you use serialize and unserialize and write the objects to a file. > > > Makes a tremendous performance improvement (for my particular code base). I > > > realize this isn't exactly what you need but; it may be a suitable > > > alternative? You should also try out the Zend Cache. For a lot of my > > > projects the cache is to $$$. > > > > > > Thanks > > > Ben > > > > > > > > > ----- Original Message ----- > > > From: "Yermo M. Lamers" <yml@yml.com> > > > To: <php-dev@lists.php.net> > > > Sent: Sunday, November 25, 2001 7:50 PM > > > Subject: [PHP-DEV] Server-Wide Persistent objects in PHP? > > > > > > > > > > > > > > I'm building a reusable component object system in PHP where construction > > > > of object trees, which needs to occur on every page, is very expensive. > > > > > > > > Running the subsequently built objects is very inexpensive. > > > > > > > > To make this system viable to use on high volume websites, I want to get > > > > rid of the "construction of objects on every page" part which means I > > > > want the ability to make object instances long lived. (i.e. build the > > > > object once and have it live for as long as the server lives similar to > > > > the way you can make objects server-wide global in mod_perl). > > > > > > > > Based on feedback I've gotten from the php-general list it looks like > > > > this kind of thing hasn't been implemented yet for PHP. Correct? > > > > > > > > If not, could anyone provide pointers where I could start taking a look at > > > > PHP internals to develop such a beast? > > > > > > > > Where I can find out: > > > > > > > > how are classes represented internally? > > > > how are objects represented? > > > > > > > > how can I establish classes/functions/variables/objects that have > > > > a server-wide global scope? What infrastructure needs to be kept > > > > around in order to keep these objects valid? > > > > > > > > can one have php interpreter instances share data? (i.e. might > > > > the best solution be to build "another" php interpreter instance > > > > that persists and have an interface to pass references in and > > > > out of it?) > > > > > > > > Any other suggestions would be greatly appreciated. From what I've been > > > > able to gather having a long-lived object cache in the serverr would > > > > make PHP much more viable for high load situations. > > > > > > > > On a related question, is there a way to pre-load class definitions when > > > > the server starts so that class definition files don't have to be > > > > re-parsed on a page by page basis? > > > > > > > > thanks, > > > > > > > > -- Yermo > > > > > > > > --------------------------------------------------------------------- > > > > DTLink Software info@dtlink.com > > > > Software Development and Consulting > > > > http://services.dtlink.com > > > > --------------------------------------------------------------------- > > > > > > > > > > > > > > > > -- > > > > PHP Development Mailing List > > > > <http://www.php.net/> > > > > To unsubscribe, e-mail: php-dev-unsubscribe@lists.php.net > > > > For additional commands, e-mail: php-dev-help@lists.php.net > > > > To contact the list administrators, e-mail: php-list-admin@lists.php.net > > > > > > > --------------------------------------------------------------------- > > DTLink Software info@dtlink.com > > Software Development and Consulting > > --------------------------------------------------------------------- > > > > > > -- > > PHP Development Mailing List <http://www.php.net/> > > To unsubscribe, e-mail: php-dev-unsubscribe@lists.php.net > > For additional commands, e-mail: php-dev-help@lists.php.net > > To contact the list administrators, e-mail: php-list-admin@lists.php.net > > > > > --------------------------------------------------------------------- DTLink Software info@dtlink.com Software Development and Consulting ---------------------------------------------------------------------