Make the NFS share selection more intelligent by using a used_ratio
and oversub_ratio to determine the valid target. The used_ratio
is a hard-cap of maximum "actual" used space, oversub_ratio allows
for oversubscription of the share based upon the apparant-allocated
space for sparse files.
Removed Options: nfs_disk_util
New options added:
* nfs_used_ratio:
Float representation of the maximum allowed usage (e.g. 0.95
calculated by available_space / total_space) before the share
is no longer concidered a valid target. Default: 0.95
* nfs_oversub_ratio:
Float representation of the oversubscriotion ratio allowed when
utilizing sparse files (determined via "du"). This gets
multiplied against the total_capacity before comparing the
apparant space used by the backing volume files. Default
ratio is 1.0 (meaning reserved/allocated space cannot exceed
total space available on the mount).
DocImpact: New Configuration Options / Removal of Config Option
bp nfs-share-selection-logic-improvement
Change-Id: I3572e106eb4c794b08bf6f499e2da2d494c4072d
5bf7b9be79