Thanks for all the feedback everyone! It seems like there are a few different ways to scale WebObjects horizontally, but nothing that is included in the WebObjects core. And there is definitely a lack of documentation on this topic around the interwebs, so I guess it's a DIY kind of project.
Thanks all! Greg On Mon, Nov 15, 2010 at 2:30 PM, Andrew Lindesay <a...@lindesay.co.nz> wrote: > Hi Greg; > > > #1 - Only one thread can be processing at once. I seem to recall that >> this is a limit in EnterpriseObjects but it's been a while. >> > > You are right that one EOF stack can only be used by one thread. You can > load-up multiple EOObjectStoreCoordinators into a pool and use those within > one virtual machine to create instances of EOEditingContext-s. I think > there's some material in PW for this or you could roll your own. > > For bulk data processing such as a billing system, one approach is to use a > "map/reduce" approach. Divvy up the work into little parcels and then > distribute them to other virtual machines each with their own EOF stack. > This spreads the load across available CPU and memory resources. > > > With that being said, how can you horizontally scale your application >> layer? If you setup more instances of your app, they each have their >> own caches, which will be out of sync with each other. Is there a >> commonly used framework for doing distributed cache management? And is >> it possible to make your applications multithreaded so page requests can >> be processed concurrently? >> > > Yes you can "process concurrently" -- there's a setting for that or you can > use; > > WOApplication.setAllowsConcurrentRequestHandling(..) > > For handling keeping caches consistent, you can use a "change notification" > system. This will shift changes from one EOF stack into other EOF stacks. > This works really well and there is an implementation in PW as well as > other implementations available. > > cheers. > > -- > Andrew Lindesay > www.silvereye.co.nz >
_______________________________________________ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
