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DragonFly users List (threaded) for 2005-02
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Re: UFS2 support?

From: Christopher Weimann <cweimann@xxxxxxxxx>
Date: Tue, 1 Feb 2005 19:47:06 -0500

On 02/01/2005-03:08PM, Matthew Dillon wrote:
>     I am not particularly interested in supporting UFS2 myself, it has all
>     the same problems that UFS has and only fixes the large filesystem size
>     issue.

Snapshots are a big deal to me personally. Specifically I have an nfs
server with millions of files on it. Doing a full dump takes about 12
hours and a restore takes several days. This is dump is taking place
over gigabit ethernet to another server with a jumbo drive array and 
isn't being limited by the network.

With ufs2 and snapshots I expect to be able to just dd the snapshot in
no time flat but I haven't tried it yet.

I have other potential solutions such as geom/gmirror/ggated which would
let me mirror to a remote machine. It sounds like your journaling stuff
will get to the same place at some point.

I'm also considering doing some sort of application level mirroring.
Just writing everything to two servers instead of one.   This is the only
thing so far that lets me avoid 5.3.

The real problem is the files systems ability to deal with huge numbers
of files.

PS: They aren't all in one directory :)

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