youngoli commented on a change in pull request #12350:
URL: https://github.com/apache/beam/pull/12350#discussion_r463905457
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File path: sdks/go/pkg/beam/core/runtime/exec/datasource.go
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@@ -47,20 +47,21 @@ type DataSource struct {
splitIdx int64
start time.Time
- // rt is non-nil if this DataSource feeds directly to a splittable unit,
- // and receives the current restriction tracker being processed.
- rt chan sdf.RTracker
+ // su is non-nil if this DataSource feeds directly to a splittable unit,
+ // and receives that splittable unit when it is available for splitting.
+ su chan SplittableUnit
Review comment:
Improved this documentation for now, but this is part of concurrency
code I might be refactoring to avoid all the blocking, so it might just be gone
with the next commit I send.
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