In LDOM, you can export a disk image file directly using the virtual disk service.The file is exported as a raw disk by the virtual disk server and can be used as an installation or data disk in the guest domain. The following steps explains the procedure for doing the same,

1)Create a disk image file as per your required virtual disk size in the primary domain.

primary# mkdir /ldoms
primary# /usr/sbin/mkfile   2g   /ldoms/file.img

2) Create a virtual disk service and virtual disk.

GlusterFS is a userspace cluster file system available in Storage cloud computing space. It aggregates various storage bricks over Infiniband RDMA or TCP/IP interconnect into one large parallel network file system which can scale to several peta bytes. It provides a powerful mechanism called Translators to extends the file system capabilities. The idea of translator is borrowed by GlusterFS from GNU/Hurd operating system. Translators can be loaded both in client and server side appropriately to improve or achieve new functionalities. Presence of Translator feature and the advantage of file system design in userspace makes GlusterFS more robust and flexible in deciding file system functionality based on our specific needs. Gluster is also coming up with a storage operating system called GlusterOS built for commodity storage hardwares. It runs in an embedded mode with GlusterFS as its core file system.

GlusterFS Official Web site - http://www.gluster.org/