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Merge pull request #54315 from ClickHouse/add-logs-parallel-replica-over-distributed

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Add logs for parallel replica over distributed
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Igor Nikonov 2023-09-06 14:23:45 +02:00 committed by GitHub
commit 54c5158291
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3 changed files with 7 additions and 5 deletions
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2
src/Processors/QueryPlan/ReadFromRemote.cpp
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@ -245,6 +245,8 @@ void ReadFromRemote::addPipe(Pipes & pipes, const ClusterProxy::SelectStreamFact
LOG_INFO(log, "cluster_for_parallel_replicas has been set for the query but has no effect: {}. Distributed table cluster is used: {}",
cluster_for_parallel_replicas, cluster_name);
}
LOG_TRACE(&Poco::Logger::get("ReadFromRemote"), "Setting `cluster_for_parallel_replicas` to {}", cluster_name);
context->setSetting("cluster_for_parallel_replicas", cluster_name);
}

2
src/Processors/QueryPlan/ReadFromRemote.h
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@ -57,7 +57,7 @@ private:
std::shared_ptr<const StorageLimitsList> storage_limits;
Poco::Logger * log;
UInt32 shard_count;
String cluster_name;
const String cluster_name;
void addLazyPipe(Pipes & pipes, const ClusterProxy::SelectStreamFactory::Shard & shard);
void addPipe(Pipes & pipes, const ClusterProxy::SelectStreamFactory::Shard & shard);

8
tests/queries/0_stateless/02835_parallel_replicas_over_distributed.sql
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@ -14,13 +14,13 @@ insert into test select *, today() from numbers(100);
SELECT count(), min(id), max(id), avg(id)
FROM test_d
SETTINGS allow_experimental_parallel_reading_from_replicas = 1, max_parallel_replicas = 3, prefer_localhost_replica = 0, parallel_replicas_for_non_replicated_merge_tree=1, use_hedged_requests=0;
SETTINGS allow_experimental_parallel_reading_from_replicas = 2, max_parallel_replicas = 3, prefer_localhost_replica = 0, parallel_replicas_for_non_replicated_merge_tree=1, use_hedged_requests=0;
insert into test select *, today() from numbers(100);
SELECT count(), min(id), max(id), avg(id)
FROM test_d
SETTINGS allow_experimental_parallel_reading_from_replicas = 1, max_parallel_replicas = 3, prefer_localhost_replica = 0, parallel_replicas_for_non_replicated_merge_tree=1, use_hedged_requests=0;
SETTINGS allow_experimental_parallel_reading_from_replicas = 2, max_parallel_replicas = 3, prefer_localhost_replica = 0, parallel_replicas_for_non_replicated_merge_tree=1, use_hedged_requests=0;
-- 2 shards
@ -38,10 +38,10 @@ insert into test2 select *, today() from numbers(100);
SELECT count(), min(id), max(id), avg(id)
FROM test2_d
SETTINGS allow_experimental_parallel_reading_from_replicas = 1, max_parallel_replicas = 3, prefer_localhost_replica = 0, parallel_replicas_for_non_replicated_merge_tree=1, use_hedged_requests=0;
SETTINGS allow_experimental_parallel_reading_from_replicas = 2, max_parallel_replicas = 3, prefer_localhost_replica = 0, parallel_replicas_for_non_replicated_merge_tree=1, use_hedged_requests=0;
insert into test2 select *, today() from numbers(100);
SELECT count(), min(id), max(id), avg(id)
FROM test2_d
SETTINGS allow_experimental_parallel_reading_from_replicas = 1, max_parallel_replicas = 3, prefer_localhost_replica = 0, parallel_replicas_for_non_replicated_merge_tree=1, use_hedged_requests=0;
SETTINGS allow_experimental_parallel_reading_from_replicas = 2, max_parallel_replicas = 3, prefer_localhost_replica = 0, parallel_replicas_for_non_replicated_merge_tree=1, use_hedged_requests=0;