Messages in this thread | | | From | "Vilain, Sam" <> | Subject | RE: 2.3.x wish list? | Date | Sat, 29 May 1999 06:26:45 -0400 |
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You *really* don't want to run an ext2fs, ufs, xfs, etc filesystem at more than 95% capacity, unless you're writing to it once and then mounting it readonly. Otherwise, it will be slow. Very slow. Think Windows 95 on barbituates.
Anyway, this isn't a kernel issue.
-----Original Message----- From: Riley Williams [mailto:rhw@MemAlpha.CX] Sent: Friday, May 28, 1999 2:58 AM To: Marcel J.E. Mol Cc: tytso@mit.edu; R.E.Wolff@BitWizard.nl; mbeattie@sable.ox.ac.uk; linux-kernel@vger.rutgers.edu Subject: Re: 2.3.x wish list?
Hi Marcel.
> It is not that I question the use of reserved space. I just want > to have finer control over it. In the end it is just a tuning > parameter. The default can still be 5%. Allowing fraction > percentages might also do the job...
To be honest, with modern hard drive sizes, the unit needs to be changed from % to %^2 or 1/10'000ths of capacity, at least. One way would be for mk*fs to allow two decimal places on the %'s, and that has the advantage of remaining compatible with the existing format, whilst another would be to allocate a new option along the lines of the following:
-u Specify the number of millionth's of reserved blocks for the superuser. This value defaults to 50,000, or 5% of the total.
I chose -u because it is not only currently not listed on mke2fs's manpage, but u is also the latinised version of the scientific symbol for millionth, its name being micro.
Best wishes from Riley.
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