dlmarion commented on PR #3139:
URL: https://github.com/apache/accumulo/pull/3139#issuecomment-1361994685
IIRC:
1. The `last` column is where the tablet was located when a file was
written last
2. The `loc` column is its current location
3. The `future` column is the where it will be located
4. `loc` is set and `future` is cleared when a tablet is hosted, and `loc`
is cleared and `future` is set when the tablet is not hosted.
I haven't run this down yet, but I'm wondering if:
1. My description of the columns is correct
2. If `loc` remains set on a normal shutdown.
If both of these are `yes`, then it should be the case on system startup
that we can take the set of servers that are alive (after waiting
MASTER_STARTUP_TSERVER_AVAIL_MIN_COUNT or
MASTER_STARTUP_TSERVER_AVAIL_MAX_WAIT) and immediately re-assign the tablets to
those servers before the normal assign/balance process takes place.
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