From: gil@netcom.com (Gilbert Nardo) Subject: Re: VFS no free Inodes message.... what? Date: Mon, 21 Jun 1993 07:30:04 GMT
dfox@hip-hop.suvl.ca.us (David Fox) writes:
[ rm stuff about inode/data_blocks ratio ]
> Could you or others expound on the pros and cons of doing this? (One
> obvious pro is that you get more inodes).
>
> I know there are other configurable options in e2fs, but I don't yet
> have a feel on how they affect performance. (Specifically, issues like
> clusters per block.)
^^^^^^^^^^^^^^^^^^-->I'm fairly sure this concept is not operational
in the FSs of Unices. The basic FS breakdown for, let's say, a hard disk
partition would look like this:
Boot block = 1 sector (usually 512 bytes)
Super block = small # sectors
inode lists = big # sectors
data blocks = normally biggest # sectors
more inodes == more files and directories you can name.
but
more inodes == less space for contents of directories and files
So, a simple 1st approximation would be:
If you have big files (such as databases) you want less inodes.
If you have many little files, you want more inodes.
Speed measurements gets more complicated (actually, I'm not as familiar
about this part :-)
-- Gil Nardo | gil@netcom.com Migrant Computing Services | (415)664-1032 (voice) 1032 Irving Street, #435 |----------------- San Francisco, 94122 | Save the Universe: Stop Entropy Now!