sollhui commented on code in PR #62661:
URL: https://github.com/apache/doris/pull/62661#discussion_r3378876661
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be/src/exec/sink/writer/vtablet_writer_v2.cpp:
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@@ -158,9 +158,10 @@ Status VTabletWriterV2::_init(RuntimeState* state,
RuntimeProfile* profile) {
_location = _pool->add(new OlapTableLocationParam(table_sink.location));
_nodes_info = _pool->add(new DorisNodesInfo(table_sink.nodes_info));
- // if distributed column list is empty, we can ensure that tablet is with
random distribution info
- // and if load_to_single_tablet is set and set to true, we should find
only one tablet in one partition
- // for the whole olap table sink
+ // If distributed column list is empty, the table uses random distribution.
+ // Mode priority (highest to lowest):
+ // 1. FIND_TABLET_EVERY_SINK: load_to_single_tablet=true (legacy
single-tablet mode).
+ // 2. FIND_TABLET_EVERY_BATCH: default round-robin per batch.
Review Comment:
This path should not receive adaptive random bucket assignments in the
current branch. FE only sets enable_adaptive_random_bucket in cloud mode, while
BE only selects VTabletWriterV2 when !config::is_cloud_mode(). Therefore V2
does not run with receiver-side adaptive random bucket rewritten
load_tablet_idx/local_bucket_seqs in the normal execution path.
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