Inode density for database machines - newfs -i
Rick C. Petty
rick-freebsd at kiwi-computer.com
Mon Jun 11 20:44:14 UTC 2007
On Mon, Jun 11, 2007 at 10:13:27PM +0200, Ivan Voras wrote:
> Francisco Reyes wrote:
> > The current machine is using 2056 inodes for 1.2TB.. with 3,539,382
> > inodes free. For the next machine I will use a higher number in newfs
> > until I get the number of free Inodes close to 100K. That will give the
> > machine plenty of free inodes.
> How long fsck takes depends on the number of used inodes, not the total
That's only true if using UFS2, softupdates, and if the cylinder groups
were properly sync'd before shutdown. Otherwise fsck will scan all inodes.
> Barring a bug in UFS, you should be able to have as little
> inodes as you want, especially if you know for sure what number to expect.
> The only thing that might bite you is if the machine is (sometime in the
> future) reassigned to some other duty that suddely requires a lot of inodes.
In which case, use growfs to reallocate the default number of inodes.
-- Rick C. Petty
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