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https://github.com/ClickHouse/ClickHouse.git
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40 lines
1.8 KiB
Bash
Executable File
40 lines
1.8 KiB
Bash
Executable File
#!/usr/bin/env bash
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# Tags: distributed
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CURDIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
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# shellcheck source=../shell_config.sh
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. "$CURDIR"/../shell_config.sh
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# We check that even if max_threads is small, the setting max_distributed_connections
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# will allow to process queries on multiple shards concurrently.
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# We do sleep 1.5 seconds on ten machines.
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# If concurrency is one (bad) the query will take at least 15 seconds and the following loops are guaranteed to be infinite.
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# If concurrency is 10 (good), the query may take less than 10 second with non-zero probability
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# and the following loops will finish with probability 1 assuming independent random variables.
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i=0 retries=30
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while [[ $i -lt $retries ]]; do
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timeout 10 ${CLICKHOUSE_CLIENT} --max_threads 1 --max_distributed_connections 10 --query "
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SELECT sleep(1.5) FROM remote('127.{1..10}', system.one) FORMAT Null" --prefer_localhost_replica=0 && break
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((++i))
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done
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i=0 retries=30
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while [[ $i -lt $retries ]]; do
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timeout 10 ${CLICKHOUSE_CLIENT} --max_threads 1 --max_distributed_connections 10 --query "
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SELECT sleep(1.5) FROM remote('127.{1..10}', system.one) FORMAT Null" --prefer_localhost_replica=1 && break
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((++i))
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done
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# If max_distributed_connections is low and async_socket_for_remote is disabled,
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# the concurrency of distributed queries will be also low.
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timeout 1 ${CLICKHOUSE_CLIENT} --max_threads 1 --max_distributed_connections 1 --async_socket_for_remote 0 --query "
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SELECT sleep(0.15) FROM remote('127.{1..10}', system.one) FORMAT Null" --prefer_localhost_replica=0 && echo 'Fail'
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timeout 1 ${CLICKHOUSE_CLIENT} --max_threads 1 --max_distributed_connections 1 --async_socket_for_remote 0 --query "
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SELECT sleep(0.15) FROM remote('127.{1..10}', system.one) FORMAT Null" --prefer_localhost_replica=1 && echo 'Fail'
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echo 'Ok'
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