Hugo Mills wrote:
You can see about the disk usage in different scenarios with the
online tool at:
http://carfax.org.uk/btrfs-usage/
Hugo.
As a side note, have you ever considered making this online tool (that
should never go away just for the record) part of btrfs-progs e.g. a
proper tool? I use it quite often (at least several timers per. month)
and I would love for this to be a visual tool 'btrfs-space-calculator'
would be a great name for it I think.
Imagine how nice it would be to run....
btrfs-space-calculator -mraid1 -draid10 /dev/sda1 /dev/sdb1 /dev/sdc2
/dev/sdd2 /dev/sde3 for example and instantly get something similar to
my example below (no accuracy intended)
d=data
m=metadata
.=unusable
{ 500mb} [|ddddd|] /dev/sda1
{ 3000mb} [|ddddd|mmmmm|mmmmm|mmmmm|mmmmm|mm...|] /dev/sdb1
{ 3000mb} [|ddddd|mmmmm|mmmmm|mmmmm|mmmmm|mmm..|] /dev/sdc2
{ 5000mb}
[|ddddd|mmmmm|mmmmm|mmmmm|mmmmm|mmmmm|mmmmm|mmmmm|mmmmm|mmmmm|] /dev/sdb1
--------
{11500mb} Total space
usable for data (raid10): 1000mb / 2000mb
usable for metadata (raid1): 4500mb / 9000mb
unusable: 500mb
Of course this would have to change one (if ever) subvolumes can have
different raid levels etc, but I would have loved using something like
this instead of jumping around carfax abbey (!) at night.
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