Date: Thu, 20 Sep 2001 19:25:32 +0200 From: Erik Trulsson <ertr1013@student.uu.se> To: "Dreamtime.net Inc." <clients@dreamtime.net> Cc: questions@freebsd.org Subject: Re: Inodes Message-ID: <20010920192531.A1071@student.uu.se> In-Reply-To: <JEELLDECNKBMDHPNMECKIENHDLAA.clients@dreamtime.net> References: <JEELLDECNKBMDHPNMECKIENHDLAA.clients@dreamtime.net>
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On Thu, Sep 20, 2001 at 08:58:33AM -0700, Dreamtime.net Inc. wrote:
> Does anyone know how many inodes are created by default with 17 Gig
> filesystem?
In the newfs(8) manpage one can find the following:
-f frag-size
The fragment size of the file system in bytes. It must be a
power of two ranging in value between blocksize/8 and blocksize.
The default is 1024 bytes.
-i number of bytes per inode
Specify the density of inodes in the file system. The default is
to create an inode for every (4 * frag-size) bytes of data space.
If fewer inodes are desired, a larger number should be used; to
create more inodes a smaller number should be given. One inode
is required for each distinct file, so this value effectively
specifies the average file size on the file system.
A quick calculation shows that, by default, one inode is created for
every (4 * 1024 = ) 4096 bytes on the disk.
17 GB / 4096 bytes gives a result of somewhat more than 4 million inodes.
(The exact number depends on exactly how large the filesystem is. 17 GB
is not a very precise measurement and I can't tell if GB is used as
10^9 bytes or 2^30 bytes. (The former is what all harddisk
manufacturers use, the second is what all operating systems use.))
--
<Insert your favourite quote here.>
Erik Trulsson
ertr1013@student.uu.se
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