reuvenlax commented on code in PR #38783:
URL: https://github.com/apache/beam/pull/38783#discussion_r3385680041
##########
sdks/java/io/google-cloud-platform/src/main/java/org/apache/beam/sdk/io/gcp/bigquery/StorageApiLoads.java:
##########
@@ -379,12 +381,19 @@ public WriteResult expandUntriggered(
PCollection<KV<DestinationT, StorageApiWritePayload>>
successfulConvertedRows =
convertMessagesResult.get(successfulConvertedRowsTag);
- if (numShards > 0) {
+ boolean streaming =
input.getPipeline().getOptions().as(StreamingOptions.class).isStreaming();
+ if (numShards > 0 && streaming) {
successfulConvertedRows =
successfulConvertedRows.apply(
"ResdistibuteNumShards",
Redistribute.<KV<DestinationT,
StorageApiWritePayload>>arbitrarily()
.withNumBuckets(numShards));
+ } else if (numShards > 0 && !streaming) {
+ successfulConvertedRows =
+ successfulConvertedRows
+ .apply("AddKeyWithSideInputs", ParDo.of(new
AddShardKeyFn<>(numShards)))
Review Comment:
worth noting that this change potentially greatly increases the number of
shards you group by. Previously the whole PCollection was sharded into
numShards shards. Now it will be numDestinations * numShards.
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