dht - sparse files rebalance enhancements

Currently data migration in rebalance reads sparse file sequentially,
disregarding which segments are holes and which are data. This can lead
to extremely long migration time for large sparse file.
Data migration mechanism needs to be enhanced so only data segments are
read and migrated. This can be achieved using lseek to seek for holes
and data in the file.
This enhancement is a consequence of
https://bugzilla.redhat.com/show_bug.cgi?id=1823703

fixes: #1222
Change-Id: If5f448a0c532926464e1f34f504c5c94749b08c3
Signed-off-by: Barak Sason Rofman <bsasonro@redhat.com>

0 files changed, 0 insertions, 0 deletions