[mythtv-users] Better think twice before choosing an FS especially for LVM

[Poul Petersen]

> My terrible options are as follows:

	Another option is to run LVM+[XJ]FS on, say, RAID5. Then
if a disk is failing, you can simply pull it and run in degraded
mode until the replacement arrives. Of course that doesn't help
you *now*...

	BTW, the software raid tools for linux actually support
growing, even in a RAID5 configuration. Now before you get
excited, md can not currently change the number of devices in
a RAID5, though that capability is apparently being worked
on (this would allow you to grow the RAID5 device by adding
drives). Rather, if you replace the current drives, one at
a time, with larger ones, you can then grow the RAID5 set
to fill the new space. So, md isn't as restrictive as some
people think, though arguably still not as flexible as
a pure LVM volume group.

	Still, it would be nice if JFS could shrink. I use
to run ext3 for everything simply for that reason. Well,
and I have a bad history with XFS and ReiserFS (yes it
was from a long time ago, but it was a production system
and I don't forgive easily) I've never been bit by
ext3. But the deletes really were just to slow, especially 
for HD sized shows. Now I run everything on JFS/LVM/RAID5.
No problems yet.

	Oddly, I think JFS on AIX can shrink, so maybe
it is a feature that will be implemented some day on
Linux. (Maybe I'm remembering that wrong)

-poul