Le Wed, 14 Jul 2010 09:42:26 -0700 vous écriviez:
> Question is:
> 1) should I try and expand the existing RAID6 volume (over 15 740GB
> disks presently), or just add a second volume?
It's risky to expand a single volume across several physical device.
> 2) If I add a second volume, how best do I tell pvfs2 to use this? Or
> should I try and LVM it with the old volume? (Can I even do that?)
Yes, definitely use LVM to aggregate the various volume. Don't stripe
across volumes, so that an unavailable/failed device doesn't fail the
whole setup.
> 3) Do I need to mess with the MetaHnadle ranges? (The amount of space
> will be the same on all 3 servers)
If you simply extend existing PVFS2 underlying volumes, you don't need
to change anything.
> 4) is there any manual rebalancing I need to do?
If you create new pvfs storage space (not recommended), you'd need to
scan all files, run pvfs2-stat on them, and defragment them if their
number of datafiles is less than the number of pvfs2 devices.
That's precisely why it's better to simply expand the existing
volumes... :)
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Emmanuel Florac | Direction technique
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