Previously, if any pieces are still on disqualified nodes, this tool
would treat those pieces as fine (if the disqualified node is still
online) or temporarily unavailable (if the disqualified node is
offline). Instead, we should treat such pieces as lost.
This also fixes a slight problem with the code that handles a broken
alias. This is not likely to happen, but if we do see an alias that is
not in the alias map, we return an error instead of nil.
Change-Id: Ib4e2e729ef0535dd7bd9ce2f621680d9f959891c
Because it was originally intended to work on only a few pieces from
each segment at a time, and would frequently have reset its list of
online nodes, segment-verify has been taking nodes out of its
onlineNodes set and never putting them back. This means that over a long
run in Check=0 mode, we end up treating more and more nodes as offline,
permanently. This trend obfuscates the number of missing pieces that
each segment really has, because we don't check pieces on offline nodes.
This commit changes the onlineNodes set to an "offlineNodes" set, with
an expiration time on the offline-ness quality. So nodes are added to
the offlineNodes set when we see they are offline, and then we only
treat them as offline for the next 30 minutes (configurable). After that
point, we will try connecting to them again.
Change-Id: I14f0332de25cdc6ef655f923739bcb4df71e079e
This adds the capability to the segment-verify tool of checking all
pieces of every indicated segment.
Pieces which could not be accessed (i.e. we couldn't get a single
byte from them) are recorded in a csv file.
I haven't been able to test this in any very meaningful way, yet, but I
am comforted by the fact that the worst things it could possibly do are
(a) download pieces too many times, and (b) miss downloading some
pieces.
Change-Id: I3aba30921572c974993363eb36d0fd5b3ae97907
This adds parts for:
1. iterating over the segments
2. using an interface for writing the segments
3. stubs for handling deleted segments
Change-Id: I76a17cac6deb0b6c042a8ab7c4155a890db9da84
