On 15/03/16 22:21, Peter Brouwer wrote:
On 10/03/2016 05:14, Mark Kirkwood wrote:
Hmm, I'm confused by the phrase 'partitions that point to the same disk':
PArtitions is used in the swift context, i.e. the partitions scheme the
ring-builder uses.
I'm sorry but that does not make sense. The ring builder lets you add
*devices*. Now a device could be a partition (e.g /dev/sdc1) as opposed
to a complete disk (/dev/sdc) but I'm at a loss to see where you are
going with this, as the ring builder is essentially partition un-aware.
I'm assuming a whole physical disk is used, i.e.
filesystem created on a disk using the whole physical disk.
So the ring structure provides a reference to a swift partition and a
disk location, right?
Hmm...this partition word again...you are talking about a whole disk, so
there is no partition (or the 'partition is = the entire disk - you have
added a whole disk after all).
What happens if the disk it is pointing to is full, does swift returns
an error to the app/client or does it try a re-lookup in an attempt to
find space elsewhere?
I think I answered that previously. Swift can survive *some* of the
disks being full, but eventually you'll get a PUT failure for
objects/containers (a 50x http error), and you will be unable to add any
more until you:
- add more disks to existing servers (or)
- add more servers and disks
and amend the ring with these additional devices.
regards
Mark
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