Oops, forgot to post to the list. Sorry Tom. -------- Original Message -------- Subject: Re: Performance & Scalability Concern Date: Wed, 05 Jul 2000 07:24:32 -0700 From: Eric Richardson <[EMAIL PROTECTED]> To: [EMAIL PROTECTED] References: <[EMAIL PROTECTED]> Tom Wnuk wrote: > I just migrated some ejb's from a Weblogic 5.1 installation to Orion. The > version I'm using is whatever was available from the web site about a week > ago -- orion.jar dated 6-5-2000, v1.xx. > > Some observations: > > 1. XML not DOM Level 2 > My beans have used XML from the beginning and I'm using xerces & xalan. > Orion uses parser.jar from Sun which is DOM Level 1 compliant and includes > the org.w3.* and org.xml.* packages. This creates a problem when my beans > try and utilize methods that are in DOM Level 2 such as Document.normalize() > and Node.importNode(). My temporary solution was to remove those classes > from the parser.jar file, they're then picked up by xerces.jar which resides > in the classpath. IMHO this is a problem in Orion. As far an application is concerned, they should only be able to see the J2EE classes. Somehow the class loader scheme needs to insulate the application from the server classes. In this case XML is not part of the current J2EE spec and I'm hoping they won't add it. I haven't looked at an future specs on J2EE. Eric :-) > > > 2. Performance significantly slower > It's not rocket science, but I clocked the elapsed time it takes to complete > a round trip from a test client. Using the same code, Orion was at least 2x > slower than WL 5.1 and did not scale well when more clients were added. > WL 5.1 Orion 1.x > One client .4xx .8xx > Multiple (3) .6xx 2.xx > > I could live with 2x slower but when adding more clients it simply gets > worse, much worse. For development purposes no problem, not ready for > production use though. > > Also, the only known difference between the two deployments is, the JDBC > driver. I'm reading/writing to an Oracle 8i database using a JDBC 2.0 Type > 2 driver whereas with Orion I'm using JDBC Type 4 (thin driver from Oracle). > I'm sure this adds to the response time issue but I can't believe it's the > cause of the scalability problem. > > I'm sure there's more tweaking I could do with Orion, but as I'm sure > everyone is aware, documentation is hard to find. > > Also, does anyone have any benchmarks using Type 2 vs. Type 4 drivers? > > Please, feedback is welcome. > > I'm evaluating Orion, JBoss, and JRun. I'm leaning towards Orion for many > reasons that I won't go into here but scalability is a 'big' issue. > > Thanks > Tom > > Tom Wnuk > [EMAIL PROTECTED] > [EMAIL PROTECTED] > > ------------------------------------------------------------------------ > Name: winmail.dat > winmail.dat Type: application/ms-tnef > Encoding: base64
