mirror of
https://github.com/zrepl/zrepl.git
synced 2024-11-26 02:14:44 +01:00
69bfcb7bed
ActiveSide.do() can only run sequentially, i.e. we cannot run replication and pruning in parallel. Why? * go-streamrpc only allows one active request at a time (this is bad design and should be fixed at some point) * replication and pruning are implemented independently, but work on the same resources (snapshots) A: pruning might destroy a snapshot that is planned to be replicated B: replication might replicate snapshots that should be pruned We do not have any resource management / locking for A and B, but we have a use case where users don't want their machine fill up with snapshots if replication does not work. That means we _have_ to run the pruners. A further complication is that we cannot just cancel the replication context after a timeout and move on to the pruner: it could be initial replication and we don't know how long it will take. (And we don't have resumable send & recv yet). With the previous commits, we can implement the watchdog using context cancellation. Note that the 'MadeProgress()' calls can only be placed right before non-error state transition. Otherwise, we could end up in a live-lock. |
||
|---|---|---|
| .. | ||
| envconst | ||
| socketpair | ||
| watchdog | ||
| chunking_test.go | ||
| chunking.go | ||
| contextflexibletimeout_test.go | ||
| contextflexibletimeout.go | ||
| io.go | ||
| iocommand.go | ||