tree 7222e0027fbb0c0ae9906a1b772417292724dff1
parent 424a4e6a6c75fd7be07256fd1488163a418764f4
author James Sullivan <jfsulliv@google.com> 1632441152 +0000
committer CQ Bot <commit-bot@chromium.org> 1632441152 +0000

[local_storage] Add new space usage metrics

Adds metrics for {bytes, inodes} {used, allocated}, as well as
corresponding reports.  The reports are per-device per-day maximum value
percentiles (e.g. N% of devices reported a max value of X bytes / Y
inodes on this day), which is slightly less useful than histograms but
requires less maintenance (since histograms need explicit pre-defined
buckets, which will vary depending on the disk size).

Note that some of these already exist (e.g. total_inodes) but they're
only used/populated on blobfs and it would be complicated to change the
code to prevent blobfs from logging twice when adding logging for these
new metrics, so the simplest thing to do was just to add new replacement
metrics altogether.

Change-Id: I9a449649b6318def323d931296ff896ddcbc35ec
Reviewed-on: https://fuchsia-review.googlesource.com/c/cobalt-registry/+/584043
Commit-Queue: James Sullivan <jfsulliv@google.com>
Reviewed-by: Cameron Dale <camrdale@google.com>
Reviewed-by: Brett Wilson <brettw@google.com>
Privacy-Approval: Cameron Dale <camrdale@google.com>