-------- Original-Nachricht -------- Datum: Tue, 14 Aug 2007 09:06:27 +0200 Von: "Dominique Pfister" <[EMAIL PROTECTED]> An: [email protected] Betreff: Re: jackrabbit clustering
> Hi Philipp, > > On 13/08/07, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote: > > hi, > > > > we have a repository which contains a lot of big binary data, we want to > use clustering, and have the following questions: > > > > - Is there a way to configure the db connection used for the journal in > a different way than to give the jdbc connection parameters? A jndi data > source would be more useful to us. > > Not yet. If you'd like to see this feature, please file a JIRA issue. We might do that, jackrabbit is deployed as a resource adapter in an ear file, that makes changing values in the repository.xml file for different deployments very painful. > > > - With the clustered configuration we are limited to a db persistence > manager, with the kind of data we ingest into our system we see a huge > increase in the time it takes to process them. I think this is caused by the > db > persistence manager - do we REALLY have to use a db persistence manager? > > I'm afraid so, yes. File-based persistence managers do not provide > transaction isolation, e.g. one cluster node could potentially > overwrite elements in the file system before the whole operation is > actually committed. ouch, with really big binaries (100s of MB) our dbas will find this a little troubling... > > > - we found that you don´t need to give a cluster id, it seems there is > an algorithm to provide individual servers with cluster ids - is this safe > to use? > > This algorithm assigns a random cluster id to a cluster node: I'd > rather use a well-defined, sensible cluster id, which also helps when > tracking down what cluster node was responsible for a change. yes, we have seen that it is possible to set this via a system property. > > > - versioning is still configured for the local file system, is this ok > for a clustered installation? > > No, again you'll need a db persistence manager. we changed that! > > Kind regards > Dominique thx a lot Philipp -- GMX FreeMail: 1 GB Postfach, 5 E-Mail-Adressen, 10 Free SMS. Alle Infos und kostenlose Anmeldung: http://www.gmx.net/de/go/freemail
