esign-primer 4 / 97 Highload Architecture › Webserver (Apache, Nginx) › Cache (Memcached) › Message Broker (Kafka, Amazon SQS) › Coordination system (Zookeeper, etcd) https://github.com/donnemartin/ esign-primer 5 / 97 Highload Architecture › Webserver (Apache, Nginx) › Cache (Memcached) › Message Broker (Kafka, Amazon SQS) › Coordination system (Zookeeper, etcd) › MapReduce (Hadoop, Spark) › Network esign-primer 6 / 97 Highload Architecture › Webserver (Apache, Nginx) › Cache (Memcached) › Message Broker (Kafka, Amazon SQS) › Coordination system (Zookeeper, etcd) › MapReduce (Hadoop, Spark) › Network

数据的根节点。Doris 将通过 json_root 抽取根节点的元素 进行解析。默认为空。 数据源的类型。当前支持： 支持如下数据源属性： 1. Kafka 的 broker 连接信息。格式为 ip:host。多个broker之间以逗号分隔。 2. 指定要订阅的 Kafka 的 topic。 3. 指定需要订阅的 kafka partition，以及对应的每个 partition data_source_properties data_source_properties kafka_broker_list kafka_broker_list "kafka_broker_list" = "broker1:9092,broker2:9092" "kafka_broker_list" = "broker1:9092,broker2:9092" kafka_topic kafka_topic "kafka_topic" FROM FROM KAFKA KAFKA (( "kafka_broker_list" "kafka_broker_list" == "broker1:9092,broker2:9092,broker3:9092" "broker1:9092,broker2:9092,broker3:9092",, "kafka_topic" "kafka_topic"

background thread to prevent snapshot GC from blocking Raftstore message loops #11966 • Support dynamic setting of the the maximum message length (max-grpc-send �→ -msg-len) and the maximum batch size mix default values and custom values. Otherwise, you might encounter the Duplicated Error error message. • You can use the tidb_allow_remove_auto_inc system variable to allow or forbid removing the AUTO_INCREMENT '=https' --tlsv1.2 -sSf https://tiup-mirrors.pingcap.com/ �→ install.sh | sh If the following message is displayed, you have installed TiUP successfully: Successfully set mirror to https://tiup-mirrors

recommended that you avoid mix- ing default and custom values to prevent encountering the Duplicated Error message. • You can use the tidb_allow_remove_auto_inc system variable to allow or forbid removing the AUTO_INCREMENT '=https' --tlsv1.2 -sSf https://tiup-mirrors.pingcap.com/ �→ install.sh | sh If the following message is displayed, you have successfully installed TiUP: Successfully set mirror to https://tiup-mirrors '=https' --tlsv1.2 -sSf https://tiup-mirrors.pingcap.com/ �→ install.sh | sh If the following message is displayed, you have successfully installed TiUP: Successfully set mirror to https://tiup-mirrors

recommended that you avoid mix- ing default and custom values to prevent encountering the Duplicated Error message. • You can use the tidb_allow_remove_auto_inc system variable to allow or forbid removing the AUTO_INCREMENT '=https' --tlsv1.2 -sSf https://tiup-mirrors.pingcap.com/ �→ install.sh | sh If the following message is displayed, you have successfully installed TiUP: Successfully set mirror to https://tiup-mirrors '=https' --tlsv1.2 -sSf https://tiup-mirrors.pingcap.com/ �→ install.sh | sh If the following message is displayed, you have successfully installed TiUP: 101 Successfully set mirror to https://tiup-mirrors

@param pageable a pageable parameter required by hibernate * @return player list package by page message */ @Query(value = "SELECT player_jpa FROM PlayerBean player_jpa") Page getPlayersByPage(Pageable static class NotEnoughException extends RuntimeException { public NotEnoughException(String message) { super(message); } } // Run SQL code in a way that automatically handles the // transaction retry logic static class NotEnoughException extends RuntimeException { public NotEnoughException(String message) { super(message); } } // Run SQL code in a way that automatically handles the // transaction retry logic

prevent TTL Scan queries from impacting the TiKV block cache #43206 @lcwangchao • Improve an error message related to MAX_EXECUTION_TIME to make it compatible with MySQL #43031 @dveeden • Support using the issue that TiDB server cannot start due to an error in reading the cgroup information with the error message “can’t read file memory.stat from cgroup v1: open /sys/memory.stat no such file or directory” #42659 ported DDL operations on these columns #38988 #24321 @tiancaiamao • Fix the issue that the error message is incorrect in certain type conversion errors #41730 @hawkingrei • Fix the issue that after a

MaxMessageBytes �→ from 64 MB to 1 MB to fix the issue that large messages are rejected by the Kafka Broker #3104 * Reduce memory usage in the replication pipeline #2553#3037 #2726 * Optimize monitoring items Fix the issue that DECIMAL overflow is missing in the %s value is out of �→ range in '%s'error message #27964 – Fix a bug that the availability detection of MPP node does not work in some corner cases generated by TiCDC is not constrained by max-message-size #2962 * Fix the issue that TiCDC sync task might pause when an error occurs during writing a Kafka message #2978 * Fix the issue that some partitioned

mix default values and custom values. Otherwise, you might encounter the Duplicated Error error message. • You can use the tidb_allow_remove_auto_inc system variable to allow or forbid removing the AUTO_INCREMENT '=https' --tlsv1.2 -sSf https://tiup-mirrors.pingcap.com/ �→ install.sh | sh If the following message is displayed, you have installed TiUP successfully: Successfully set mirror to https://tiup-mirrors '=https' --tlsv1.2 -sSf https://tiup-mirrors.pingcap.com/ �→ install.sh | sh If the following message is displayed, you have installed TiUP successfully: Successfully set mirror to https://tiup-mirrors

to the Region information output by the region command in pd-ctl #8412 @zeminzhou • Optimize the message that returns when you call the PD API to delete the TTL configuration #8450 @lhy1024 • Optimize query read requests to reduce the impact on other requests #8457 @nolouch • Optimize the error message that returns when you misconfigure PD microservices #52912 @rleungx • Add the --name startup parameter a new monitoring metric min safe ts #17307 @mittalrishabh • Reduce the memory usage of the peer message channel #16229 @Connor1996 • TiFlash • Support generating ad hoc heap profiling in SVG format #9320