Ken,
To answer your questions:
1.Is ReiserFS part of the kernel or is it some type of add on? It is
part of the kernel in that the kernel must understand filesystems. You
can download the code for XFS from SGI. I don't know where to get
ReiserFS except SuSE. There may be a project site on the web.
Filesystems are not a modules due to there nature, but I know that only
a portion of XFS goes into the kernel. XFS has daemons that work with
the kernel to manage writes and caching of data.
2.Who is this different for the journaling that's to be offered in the
2.4 kernel? Well, I am not familiar with what is to be in 2.4, however,
I know that a journaled filesystem is necessary for any large filesystem
to be recovered quickly. Certain types of business and projects require
very short recovery times and fsck'ing a Terabyte of data ain't gonna
work! I think it is up to us, the Linux community to vote on what we
want. I like ReiserFS so far, but want to try XFS under Linux as it is
extremely robust under SGI IRIX. The code is out there, we just have to
try it out.
3.I would take it you have to install with ReiserFS, you can't take an
exsisting system and convert it? Actually, if you can back up your
filesystem, then you can remake it with the XFS or ReiserFS tools. Just
recover the filesystem off the tape and your good to go. You'll need to
understand how to modify your /etc/fstab file so mount knows what type
filesystem you have. At install time on SuSE 6.4, you get a choice of
what you want the system to make. I haven't had time to investigate the
ReiserFS tools, but if you download XFS off SGI's website, then you
would use mkfs_xfs to build the filesystem. Under IRIX you can choose
the number of inodes, location of the journal/log (put it on a separate
controller for performance with databases), and block size. Usual kind
of filesystem stuff!
I wouldn't feel overwhelmed by all the automated stuff that goes on
during an install of a Linux distro. Actually, studying that process is
very good to understand recovery procedures since when things crap out,
you sometimes have to go thru most of those steps to get things back in
shape!
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