On Wed, Oct 26, 2011 at 14:34, Sage Weil <[email protected]> wrote: >> 1) Everything (JNI wrappers + Java) lives in the Ceph tree and build >> instructions include applying a patch to Hadoop. >> >> The current solution, and isn't too bad but needs documentation. This >> approach can be simplified to avoid patching Hadoop by integrating >> Ceph-specific Java code using the CLASSPATH global variable.
>From my experience with Hadoop, the CLASSPATH approach seems definitely good enough, and gives us more flexibility. I don't know very much about the current patch in the Apache tracker, but there really should be no need to patch the Hadoop upstream. Just provide a jar with our filesystem plugin, change fs.default.name=ceph://something/, fs.ceph.impl=com.ceph.hadoop.CephFileSystem (whatever is in the jar). http://hadoop.apache.org/common/docs/current/cluster_setup.html#Configuring+the+Hadoop+Daemons http://hadoop.apache.org/common/docs/current/core-default.html -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
