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Re: Cluster Size

Is there any other insight you can offer into this problem.

Basically, I create a named object in Ozone.  Then I add references to other data
(in the form of properly created database objects) to it and close the database.
Before closing I do a print out indicating that all data is properly added.
Immediately after closing, I re-open the database and approximately half of the
data is null values.  As I increase cluster size, the occurrences of this problem
diminish.  Might there be some lock conflict going on, or a commit error?

Falko Braeutigam wrote:

> On Fri, 27 Apr 2001, Roy Ladner wrote:
> > Can anyone give any advice on configuring the config.properties cluster
> > size, cluster space size and cluster size ratio?
> >
> > When I've tried to import a large data set into Ozone I've run into the
> > problem of losing data (null values showing up after a commit).  When
> > I've increased the cluster space size and cluster size, this problem
> > stopped, but then there are times when the server simply shuts down - no
> > error messages are given.  Should these numbers be set in relation to
> > the size of the data set being imported into Ozone?
> ozoneDB.wizardStore.clusterSize = 65536  -- the max size of each cluster
> ozoneDB.wizardStore.clusterSizeRatio = 256  -- the expected size of each
> object; helps the kernel to determine the size of newly created objects
> The size of the data is not that important - more the size of the objects and
> the  granularity of your problem in general. Clusters loaded or locked when one
> object of the cluster is loaded or locked.
> Falko
> --
> ______________________________________________________________________
> Falko Braeutigam                              mailto:falko@smb-tec.com
> SMB GmbH                                        http://www.smb-tec.com