Re: [ldm-users] Best linux file system for data on large raid5 array?

  • To: Pete Pokrandt <poker@xxxxxxxxxxxx>
  • Subject: Re: [ldm-users] Best linux file system for data on large raid5 array?
  • From: "Arthur A. Person" <person@xxxxxxxxxxxxx>
  • Date: Mon, 8 Oct 2007 13:10:27 -0400 (EDT)
Pete,

I've read good things about Sun's zfs... doesn't ever have to be fsck'd which, to me, is the scariest thing about n-TB systems. I'm getting ready to try one of these in real life so I can't say anything about it from experience. It's downside might be that it's proprietary (you have to run Solaris) and it seems to want to run its own software raid... I don't know whether it would make sense to run it on top of a hardware raid system or not. http://www.opensolaris.org/os/community/zfs.


                          Art


On Mon, 8 Oct 2007, Pete Pokrandt wrote:

All,

What filesystem type are people using for data storage on linux?

I have a 5+ Tb archive that's sitting on a hardware raid5, using
reiserfs (Reiserfsprogs-3.6.19 on CentOS), and just recently I started
getting hard machine crashes when trying to write to that file system. I
did a reiserfsck --rebuild-tree on it (since a -check reported that I
needed to) and now about 1/5 of the data that was on it is either gone
or in the lost+found directory named with inode names.

This is the second time now that I've had a reiserfs file system go
kablooey on me.

I'm considering toasting the whole thing and rebuilding with a different
file system type, but I'm not sure what is most reliable/best
performance for this kind of usage. It's a combination of lots of large
files (i.e. GRIB/GRIB2 model data files and gempak of the same) and also
lots of smaller files, i.e. nexrad level 3, lots of small files in a
bunch of directories.

I've read that ext3 (linux default) is extremely stable but can be slow.
Other choices would be jfs, xfs, others??

Any suggestions or experiences would be appreciated.

Thanks!

Pete

--
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^ Pete Pokrandt                    V 1447  AOSS Bldg  1225 W Dayton St^
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^ University of Wisconsin-Madison  V (608) 262-0166 (Fax)             ^
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Arthur A. Person
Research Assistant, System Administrator
Penn State Department of Meteorology
email:  person@xxxxxxxxxxxxx, phone:  814-863-1563


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