[Beowulf] Problem with ext3 filesystem?

[Mark Hahn]

> Lustre uses a (significantly patched) ext3 right now to get beyond 8TB per

I believe Lustre's ext3 extensions are incorporated in ext4,
which is, at least by the developers, considered stable now.
the ext* developers are not gonzo - certainly most of the 
ext3->ext4 diffs have been in production use for years...

> OSD.  Since they appear to be migrating over to zfs, and their patches aren't

has anyone seen a performance-oriented comparison of zfs with alternatives?
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