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Message-ID: <4B221BC6.80906@rug.nl>
Date: Fri, 11 Dec 2009 11:15:34 +0100
From: Dennis van der Laan <d.g.van.der.laan@rug.nl>
Organization: Rijksuniversiteit Groningen / Rekencentrum
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To: users@jackrabbit.apache.org
Subject: clustering configuration question
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Hi,

I'm a little confused about the clustering configuration. The wiki page
(http://wiki.apache.org/jackrabbit/Clustering) first says all cluster
nodes need their own private FileSystem and Search index. But the
requirements section does not mention the FileSystem configuration.

I currently have (as it seems) a working cluster setup with two nodes
(different machines), but I'm very suspicious about the configuration.
Here it is:

    <Cluster id="node1">
        <Journal
class="org.apache.jackrabbit.core.journal.OracleDatabaseJournal">
            <param name="revision" value="${rep.home}/revision.log" />
            <param name="driver" value="oracle.jdbc.driver.OracleDriver" />
            <param name="url" value="<db_url>" />
            <param name="user" value="<db_user>"/>
            <param name="password" value="<db_passwd>"/>
        </Journal>
    </Cluster>

    <FileSystem class="org.apache.jackrabbit.core.fs.db.OracleFileSystem">
        <param name="url" value="<db_url>"/>
        <param name="user" value="<db_user>"/>
        <param name="password" value="<db_passwd>"/>
        <param name="schemaObjectPrefix" value="rep_"/>
    </FileSystem>

    <Security ... />

    <Workspace name="${wsp.name}">
        <FileSystem
class="org.apache.jackrabbit.core.fs.db.OracleFileSystem">
            <param name="url" value="<db_url>"/>
            <param name="user" value="<db_user>"/>
            <param name="password" value="<db_passwd>"/>
            <param name="schemaObjectPrefix" value="wrk_"/>
        </FileSystem>

        <PersistenceManager
class="org.apache.jackrabbit.core.persistence.db.OraclePersistenceManager">
            <param name="url" value="<db_url>"/>
            <param name="user" value="<db_user>"/>
            <param name="password" value="<db_passwd>"/>
            <param name="schemaObjectPrefix" value="${wsp.name}_"/>
            <param name="externalBLOBs" value="false"/>
        </PersistenceManager>

        <SearchIndex ... />
    </Workspace>

    <Versioning rootPath="${rep.home}/version">
        <FileSystem
class="org.apache.jackrabbit.core.fs.db.OracleFileSystem">
            <param name="url" value="<db_url>"/>
            <param name="user" value="<db_user>"/>
            <param name="password" value="<db_passwd>"/>
            <param name="schemaObjectPrefix" value="ver_"/>
        </FileSystem>

        <PersistenceManager
class="org.apache.jackrabbit.core.persistence.db.OraclePersistenceManager">
            <param name="url" value="<db_url>"/>
            <param name="user" value="<db_user>"/>
            <param name="password" value="<db_passwd>"/>
            <param name="schemaObjectPrefix" value="version_"/>
            <param name="externalBLOBs" value="false"/>
        </PersistenceManager>
    </Versioning>

    <SearchIndex ... />
    <DataStore ... />

For the second cluster node, the repository.xml file is almost the same,
except the global <Cluster> and <FileSystem> configurations:

    <Cluster id="node2">
        <Journal
class="org.apache.jackrabbit.core.journal.OracleDatabaseJournal">
            <param name="revision" value="${rep.home}/revision.log" />
            <param name="driver" value="oracle.jdbc.driver.OracleDriver" />
            <param name="url" value="<db_url>" />
            <param name="user" value="<db_user>"/>
            <param name="password" value="<db_passwd>"/>
        </Journal>
    </Cluster>

    <FileSystem class="org.apache.jackrabbit.core.fs.db.OracleFileSystem">
        <param name="url" value="<db_url>"/>
        <param name="user" value="<db_user>"/>
        <param name="password" value="<db_passwd>"/>
        <param name="schemaObjectPrefix" value="rep_node2_"/>
    </FileSystem>

So basically, the cluster id's are different (duh) and only the global
filesystem is different. The tables used for the workspace filesystem
and versioning are the same. I imagine all filesystems should be either
different or all the same for all cluster nodes. Could anybody shed some
light on this?

TIA
Dennis

-- 
Dennis van der Laan


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