> There are also a couple FileSystem implementations that replace HDFS with
> Ceph. One uses the libceph userspace client, and one relies on the
> kernel's support and uses a few ioctls to control/expose file placement.
> I wonder if that would also meet your needs?
The version that uses the native kernel Ceph client is available for
Hadoop 0.21 in the following Git branch:
git://github.com/noahdesu/hadoop-common.git haceph/0.21-mimic-rawlocal
The JNI code that interfaces to the Ceph IOCTLs is integrated with
the Hadoop native-code feature. To compile simply use:
ant -Dcompile.native=true -Dnative.ceph.srcdir=/path/to/ceph <targets>
Note that by default Hadoop native code builds some compression libraries,
thus you'll need to make sure that zlib development files are installed on the
system (zlib1g-dev on Debian).
Finally, the file system URI scheme to use is:
"ceph:/path/to/mount".
- Noah--
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