/**
* Given the DiskUsage for a node and the size of the shard, return the percentage of free disk if
* the shard were to be allocated to the node.
*
* @param usage A DiskUsage for the node to have space computed for
* @param shardSize Size in bytes of the shard
* @return Percentage of free space after the shard is assigned to the node
*/
public double freeDiskPercentageAfterShardAssigned(DiskUsage usage, Long shardSize) {
shardSize = (shardSize == null) ? 0 : shardSize;
return 100.0 - (((double) (usage.getUsedBytes() + shardSize) / usage.getTotalBytes()) * 100.0);
}
