Re: [SLUG] Filesystems

From: SpamFree (SpamFree@tampabay.rr.com)
Date: Mon Apr 28 2003 - 17:56:50 EDT


On Monday April 28 2003 05:12 pm, you wrote:
> It helps tremendously. Thank you very much. My question about ext3 is the
> different forms of journaling. For example, on partitions that active use
> was occurring on constantly I'd like to have the fastest performance
> possible. Then for a partition where I'd keep MP3 and essentially
> write-once, read-many files I'd want to have the utmost integrity available
> on those partitions. This is possible with ext3 (AFAIK), correct? Ext3
> will probably be my filesystem of choice due to its maturity and ample
> amount of support.
>
> Chris Short, SrA USAF
> shortc@centcom.mil

These, though relatively old, may be helpful for your second question.

http://www.redhat.com/support/wpapers/redhat/ext3/ext3.pdf
http://www.redhat.com/support/wpapers/redhat/ext3/why.html

Since you mention using MP3s on the system I will assume that this is going to
be a workstation and not an application specific server (read big database
server with multiple gigabit nics). In such a case I would wager that you
will not be able to discern any difference in tuning the ext3 journaling
beyond the defaults. But, you are probably also a tinkerer and would simply
like to try anyway.

This is another advantage of using ext3. You can try any and all the
performance setting that you wish without any problem because ext3 is simply
ext2 with journaling added. That means that you can add and remove journaling
on your file system as simply as:
To add - mkfs -t ext2 -j
To remove - umount; edit /etc/fstab change ext3 to ext2; mount

see man mkfs and man mkfs.ext3 for confusing details.



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