On Mon, Feb 4, 2013 at 11:10 AM, Luke Noel-Storr <[email protected]> wrote: > Hi, > > I'm working on a project where we are using JCR and Jackrabbit to store data, > the project will be deployed on load balanced Websphere instances, and I have > a few questions about the best way to set this up. > > Though the project is being deployed to a J2EE container, it is just a basic > servlet application, and so so far I have just been using the embedded > servlet version of Jackrabbit. > > The application is being deployed in our client's infrastructure, and so we > don't have much control over the environment, and anything which strays from > their standard deployment is usually a PITA. > > We will be using Oracle for the persistence layer (Oracle 9i), acquiring the > connection via JNDI. > > I've read the closeting section of the wiki, but have some questions: > >> • Each cluster node must have its own repository configuration. > > Does this need to differ from node to node? Can it be included in the > EAR/WAR? Can the parts that need to differ be programatically applied at > startup (for example, could we programatically at startup set the node-id to > the current machine name?)
Yes can be included in the EAR/WAR. > > >> • A DataStore must always be shared between nodes, if used. > > > I think this should be fine, with a DataStore on Oracle, correct? Yes > > >> • The global FileSystem on the repository level must be shared (only >> the one that >> is on the same level as the data store; only in the repository.xml >> file). > > > I'm a bit lost here, the FileSystem link in the wiki goes nowhere but looking > up FileSystem on this page: > > http://jackrabbit.apache.org/jackrabbit-configuration.html#JackrabbitConfiguration-Filesystemconfiguration > > It seems we could use a Database file system. Would this meet the above > requirement? Also, I see there is an OracleFileSystem but not an > Oracle9FileSystem, is the OracleFileSystem compatible with Oracle 9i? > I'm not sure about this part. It could be yes. > >> • Each cluster node needs its own (private) workspace level and >> version FileSystem >> (only those within the workspace and versioning configuration; the >> ones in the >> repository.xml and workspace.xml file). > > > Ah, but if I use a DBFileSystem, does that break this requirement? How do I > specify a separate FileSystem for the repository level and workspace level? > > Also, unrelated to clustering, if I use a DB file system, will this mean no > files need to be written to the disk from Jackrabbit (as the client are also > funny about that on their infrastructure), or would some components (Lucene) > still need to write down files? Yes Lucene will still need to write to the local filesystem. > > >> • Each cluster node needs its own (private) Search indexes. > > Ah, so this probably would be Lucene writing files to the disk, right? Yes > > >> • Every cluster node must be assigned a unique ID. > > > As mentioned earlier, can this be set programatically? Not sure about that, but I've seen quite some cases where it is set as a system property for the specific container during startup. > > >> • A journal type must be chosen, either based on files or stored in a >> database. >> • Each cluster node must use the same (shared) journal. > > I think I'm OK on these, just use a DB journal? (Oracle 9i OK?) Yes. > > >> • The persistence managers must store their data in the same, globally >> accessible location (see PersistenceManagerFAQ). > > Again, just use Oracle, and all OK, correct? Yes. > > > Also, and advice on locking would be appreciated. > Sorry can't help you with this one. > > And finally, a question about the persistence around this: > >> If you use a database persistence manager, the configured database >> connection must not be under the control of an external transaction manager. >> Jackrabbit implements distributed XA transaction support on a higher level, >> and expects to be in full control of the underlying database connection. > > How would I know if it is under the control of an external transaction > manager? Would this be configured in websphere? > Sorry can't help you with this one. > > Sorry for so many questions, we're on a super tight deadline (is there any > other kind), so I don't have to to experiment with stuff. > No problem I hope somebody else can answer the other questions. > > Many Thanks, > > Luke Noel-Storr. > ---------------- > > Integrated Publishing Solutions Ltd. > Tel: +44 (0)1926 889199 > http://www.integrate.co.uk > > > -- Jeroen Reijn Solution Architect Hippo Amsterdam - Oosteinde 11, 1017 WT Amsterdam Boston - 1 Broadway, Cambridge, MA 02142 US +1 877 414 4776 (toll free) Europe +31(0)20 522 4466 www.onehippo.com http://about.me/jeroenreijn
