In this commit, we add a new metric `sent_total_size`
keeping track of how many bytes of hints a node
has sent. The metric is supposed to complement its
counterpart in storage proxy that counts how many
bytes of hints a node has received. That information
should prove useful in analyzing statistics of
a cluster -- load on given nodes and where it comes
from.
We also change the name of the matric `sent`
to `sent_total` to avoid the conflict of prefixes
between the two metrics.
We change the type of node identifiers
used within the module and fix compilation.
Directories storing hints to specific nodes
are now represented by host IDs instead of
IPs.
Currently, data structures used in manager.hh
use their own aliases for gms::inet_address.
It is clear they all should use the same type
and having different names for it only reduces
readability of the code. This commit introduces
a common alias -- endpoint_id -- and gets rid
of the other ones.
This commit is also the first step in modularizing
manager.hh by extracting common types to another
file.
