Subject: Re: what makes lost+found in NetBSD?
To: Christoph Badura <email@example.com>
From: Incorrigible punster -- do not incorrige <greywolf@defender.VAS.viewlogic.com>
Date: 11/08/1995 13:58:02
#define AUTHOR "firstname.lastname@example.org (Christoph Badura)"
* greywolf writes:
* >[...] but, again,
* >disk space isn't at *that* much of a premium any more, so there's no real
* >reason to reserve 8K of space for inode relocation.
I meant space for filenames...
* Well, then I argue that there isn't a reason to reserve 4 or 8 K off a
* file system for a lost+found. That's insignificant compared to the
* space you waste on inodes, bitmaps, and replicated super-blocks.
I believe you're arguing in favour of my point. You're not saving space
for the files, you're saving space for the file *names*, which won't
take up a significant amount of space unless you have lots and LOTS of
files which need to be reconnected. With the directory taking up one
FS block (typically 4 or 8k anyway), and assuming a filesystem with
5,000 inodes, this would result in files of length 5 ("#NNNN"), of which
a directory with 4KB allocated would nicely hold 819.
That's a _lot_ of inodes needing reconnection, folks.
* >Besides, don't we do automagic directory collapsing?
* I believe only when unlinking. And a directory uses at least a FS
* block anyway.
Yes, this is true. I still reserve my argument that as long as you have
a lost+found, the chances are good that you're going to have room to re-
connect everything which needs it.
In case anyone missed it, running out of inodes is a moot point since
all you're doing is re-associating a name with a disconnected inode
(which is why it gets named '#<inode-number-zero-padded-to-order-of-
magnitude-of-maximum-inode-number>' instead of anything more meaningful).
But then, you all knew that. :-)
* Christoph Badura email@example.com +49 721 606137
#undef AUTHOR /* "firstname.lastname@example.org (Christoph Badura)" */
Regression Test (re gresh' n test) n. 1. A simple show of hands among
your programmers indicating how much they regret having joined your