keith-turner commented on issue #3670:
URL: https://github.com/apache/accumulo/issues/3670#issuecomment-2176937770
While working on trying to determine the best angle to get started with
this, one important thing I realized is that a tablet only has the following
types of threads that interact with it.
* Scan thread
* Write thread
* Minor compaction thread
* Refresh thread
* Close thread
* Instantiation thread that creates a tablet on a tserver
Prior to elasticity there were more types of threads to worry about. The
threads above need to synchronize on different in memory state and this
interleaved with I/O. Started experimenting with [this
structure](https://github.com/keith-turner/accumulo/blob/60b129d1f0999ff56942d793e74bab5ba012ee65/server/tserver/src/main/java/org/apache/accumulo/tserver/tablet/TabletState.java).
The idea behind this structure is that each of the thread type uses a
coordination object to interact with the shared in memory state of the tablet.
Maybe this structure would cleanly separate the in memory state+sync from the
I/O+compute code, not sure though.
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