paul wrote:
Check out the bottom of this page:
http://wiki.apache.org/hadoop/DiskSetup
Just re-reading that page, two suggestions that may not be appropriate,
1. Reducing reserved space to 0. AFAIK, ext3 needs a certain amount of
free space to function properly - the man page for mke2fs suggests that
this reserved space is used for defragmentation, as well as being
emergency space reserved for root. A quick Google doesn't turn up
anything more definitive, but setting it to 0 is a bad idea afaics.
2. Reducing the number of inodes. This is a good idea, if you are
really, really sure that nothing will create small files on that
partition. Unless you are absolutely certain of this, I would not change
from the default - I'm not clear on how much of an overall saving you'll
make and the downside to running to running out of inodes is that you
start getting "out of space" errors when you try to write to that disk
(despite df showing you loads of free space), so again, I'm not sure I'd
recommend this one.
-stephen
--
Stephen Mulcahy, DI2, Digital Enterprise Research Institute,
NUI Galway, IDA Business Park, Lower Dangan, Galway, Ireland
http://di2.deri.ie http://webstar.deri.ie http://sindice.com
