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Re: OpenBase & WebObjects for scaling
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Re: OpenBase & WebObjects for scaling


  • Subject: Re: OpenBase & WebObjects for scaling
  • From: Joe Moreno <email@hidden>
  • Date: Mon, 29 Dec 2008 23:10:52 -0800

Hi Andrew,

I think I ran into the exact problem you mentioned about the deadlock in OpenBase 10 using the default primary key generation.

Scott Keith advised me to compile the WO apps against the OpenBasePKPlugin.framework which uses the OpenBaseJDBC.jar and, even under heavy load, I've never had a problem using OB 10 with the plugin. I just had to add a single line to my Application.java:

JDBCPlugIn .setPlugInNameForSubprotocol ("com.webobjects.jdbcadaptor.OpenBasePKPlugIn", "openbase");

	Many thanks for the feedback.

Cheers,
Joe

On Dec 29, 2008, at 13:14:31, Andrew Lindesay wrote:

Hello Joe;

In high-volume concurrent situations, there is an issue with EOF together with OPENBASE where concurrent transactions can get into a deadlock when writing into the same series of tables. Let me be very clear; not a problem with OPENBASE per se, but a specific problem with EOF and OPENBASE. To avoid this, I have created a simple subclass of the JDBC Adaptor (distributed in a self-contained Framework jar) specifically to address this issue. To find out more about this read the LEWOStuff PDF under;

	9) OPENBASE JDBC Adaptor

cheers.

Does anyone have any real world, recent, experience with OpenBase on a large scale?

___ Andrew Lindesay www.lindesay.co.nz


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