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Cluster FS - Sharing a LUN/Disk

Link to this post 23 Jul 09

Is there a Linux filesystem that will allow 2 hosts to mount the same LUN (on a SAN) or a disk at the same time, both with write and read access?

Like Sun QFS.


Link to this post 06 Aug 09


this can be done with cluster file systems like RedHat's GFS or Oracle's OCFS2 (
However, the modern approach to this and to get more performance out of your two boxes would be to use a parallel file system. With this approach, each of the two machines would have its own LUN, but you would see a single shared file system with striped file contents, comparable to a RAID across the hosts. In this case, I would recommend the Fraunhofer parallel file system FhGFS (, because it's very easy to install and performance is typically very good. But as usual, there are also some other solutions available in this category...


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