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

From: Matthew Dillon <dillon@xxxxxxxxxxxxxxxxxxxx>
Date: Wed, 2 Feb 2005 10:09:41 -0800 (PST)

:I don't have a 2TB file system.  I have a 172GB file system that has about
:11 million files on it.  They are broken down into directories to avoid
:have thousands of files in any one directory.  The number of bytes isn't
:the problem in the backup it is the number of files.  
:With a snapshot and dd I can avoid the issue of dump having to deal with
:all those files.  I don't think there is any file system out there that
:can deal with the huge number of files efficiently.  I think even NetApp 
:filers have backup issues with millions of files.

    This is what the journaling work is meant for... incremental realtime
    backups.  Snapshots are a poor hack compared to what you will be able
    to do with the journaling features once they are complete.

					Matthew Dillon 

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