DWiki has a pretty simple way of displaying comments; all comments ona single page, which also has the main entry. There's a lot of moresophisticated comment handling systems, like LiveJournal and Slashdot,and I won't deny that part of why DWiki is simple is that simple is less code . But part of it is deliberate,because it's all about the context.

Specifically, I want people who read comments to have as much contextas possible, which means that I want them to

Both SANs and cluster filesystems have multiple machines talking tomultiple shared disks that all of them can see. The difference is thatSANs are designed for a single machine to talk to a given disk at atime, while cluster filesystems allow multiple machines to talk to thedisk at once.

Which raises the big question: why do you need cluster filesystemsat all? Why can't multiple systems share a single disk without doinganything special?

There's two problems with shared disks: caches and coordinatingupdates. These