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would OCFS2 be a better choice for this?Only your workload knows for sure :)
An advantage of OCFS2 is that it has a distributed lock management scheme, so if a node goes down, the system stalls a bit and then a new lock manager is elected.
OCFS2 cleanup using its fsck(8) tool is rather quick. An interesting feature is an OCFS2 filesystem can be checked for integrity whilst still mounted. Of course, the filesystem must be unmounted everywhere before corrections can be made.
An OCFS2 file system can be driven pretty much at wirespeed. Your application should do proper caching, so you can bypass the kernel's data cache if you like.