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          • Restoring ClickHouse Metadata - MapReduce Service

            Restoring ClickHouse Metadata - MapReduce Service

            OBS Indicates that data is restored from OBS. This option is available for MRS 3.3.0-LTS.1 and later versions only.

            Help > MapReduce Service > User Guide > MRS Cluster O&M > MRS Cluster Data Backup and Restoration > Restoring MRS Cluster Component Data
          • Restoring Manager Data (MRS 3.x and Later Versions) - MapReduce Service

            Restoring Manager Data (MRS 3.x and Later Versions) - MapReduce Service

            OBS: indicates that backup files are stored in OBS.

            Help > MapReduce Service > User Guide > MRS Cluster O&M > MRS Cluster Data Backup and Restoration > Restoring MRS Cluster Component Data
          • Using BulkLoad to Import Data to HBase in Batches - MapReduce Service

            Using BulkLoad to Import Data to HBase in Batches - MapReduce Service

            OBS Path: Find the info.txt file in the created OBS parallel file system and click Yes. HDFS Path: Select an HDFS path, for example, /tmp/test, and click Yes. Click OK and wait until the data file is imported.

            Help > MapReduce Service > Best Practices > Data Migration
          • What Are Regions and AZs? - MapReduce Service

            What Are Regions and AZs? - MapReduce Service

            Public services such as Elastic Cloud Server (ECS), Elastic Volume Service (EVS), Object Storage Service (OBS), Virtual Private Cloud (VPC), Elastic IP (EIP), and Image Management Service (IMS) are shared within the same region.

            Help > MapReduce Service > FAQs > MRS Basics
          • MRS Cluster Overview - MapReduce Service

            MRS Cluster Overview - MapReduce Service

            Table 1 MRS console and Manager capability comparison Operation Console Manager Changing subnets, adding security group rules, controlling OBS permissions, managing agencies, and synchronizing IAM users Yes No Adding node groups, scaling out, scaling in, and upgrading specifications

            Help > MapReduce Service > User Guide > Managing Clusters
          • Viewing MRS Job Details and Logs - MapReduce Service

            Viewing MRS Job Details and Logs - MapReduce Service

            After a job is executed, the system will compress and save the logs to the corresponding path if you choose to save job logs to OBS or HDFS. Therefore, after a job execution of this type is completed, the job status is still Running.

            Help > MapReduce Service > User Guide > Submitting an MRS Job
          • Restoring ClickHouse Service Data - MapReduce Service

            Restoring ClickHouse Service Data - MapReduce Service

            OBS Indicates that data is restored from OBS. This option is available for MRS 3.3.0-LTS and later versions only.

            Help > MapReduce Service > User Guide > MRS Cluster O&M > MRS Cluster Data Backup and Restoration > Restoring MRS Cluster Component Data
          • Using Loader to Export Data - MapReduce Service

            Using Loader to Export Data - MapReduce Service

            When using Loader to export data from HDFS or OBS, the input paths and input path subdirectories of the HDFSor OBS data source and the name of the files in these directories do not contain any of the following special characters: /\"':;,.

            Help > MapReduce Service > Component Operation Guide (Normal) > Using Loader > Exporting Data
          • Using Loader to Export Data from an MRS Cluster - MapReduce Service

            Using Loader to Export Data from an MRS Cluster - MapReduce Service

            When using Loader to export data from HDFS or OBS, the input paths and input path subdirectories of the HDFSor OBS data source and the name of the files in these directories do not contain any of the following special characters: /\"':;,.

            Help > MapReduce Service > Component Operation Guide (LTS) > Using Loader > Creating a Loader Data Export Job
          • Submitting an MRS Flink Job on DataArts Studio - MapReduce Service

            Submitting an MRS Flink Job on DataArts Studio - MapReduce Service

            You can select an HDFS or OBS path. - Output Data Path Data output path. You can select an HDFS or OBS path. - Job Status Polling Interval (s) Interval for querying job running status.

            Help > MapReduce Service > User Guide > Submitting an MRS Job > Submitting an MRS Job on DataArts Studio
          • ALM-45737 TokenServer Heap Memory Usage Exceeds the Threshold - MapReduce Service

            ALM-45737 TokenServer Heap Memory Usage Exceeds the Threshold - MapReduce Service

            Impact on the System If the heap memory of the Guardian TokenServer instance overflows, OBS cannot be accessed. Possible Causes The heap memory of the TokenServer instance is overused or the heap memory is inappropriately allocated. Handling Procedure Check heap memory usage.

            Help > MapReduce Service > User Guide > MRS Cluster O&M > MRS Cluster Alarm Handling Reference
          • ALM-45738 TokenServer Direct Memory Usage Exceeds the Threshold - MapReduce Service

            ALM-45738 TokenServer Direct Memory Usage Exceeds the Threshold - MapReduce Service

            Impact on the System If the direct memory of the Guardian TokenServer instance overflows, OBS cannot be accessed. Possible Causes The direct memory of the TokenServer process is overused or the direct memory is inappropriately allocated.

            Help > MapReduce Service > User Guide > MRS Cluster O&M > MRS Cluster Alarm Handling Reference
          • ALM-45739 TokenServer Non-Heap Memory Usage Exceeds the Threshold - MapReduce Service

            ALM-45739 TokenServer Non-Heap Memory Usage Exceeds the Threshold - MapReduce Service

            Impact on the System If the non-heap memory of the Guardian TokenServer instance overflows, OBS cannot be accessed. Possible Causes The non-heap memory of the TokenServer instance is overused or the non-heap memory is inappropriately allocated.

            Help > MapReduce Service > User Guide > MRS Cluster O&M > MRS Cluster Alarm Handling Reference
          • ALM-45740 TokenServer GC Duration Exceeds the Threshold - MapReduce Service

            ALM-45740 TokenServer GC Duration Exceeds the Threshold - MapReduce Service

            Impact on the System TokenServer responds slowly, and OBS cannot be accessed. Possible Causes The heap memory of the TokenServer process is overused or inappropriately allocated, causing frequent occurrence of the GC process. Handling Procedure Check the GC duration.

            Help > MapReduce Service > User Guide > MRS Cluster O&M > MRS Cluster Alarm Handling Reference
          • Using Spark - MapReduce Service

            Using Spark - MapReduce Service

            Why Do I Fail to Create a Table in the Specified Location on OBS After Logging to Spark Beeline? Spark Shuffle Exception Handling Why Does the Cluster Port Fail to Connect When a Client Outside the Cluster Is Installed or Used?

            Help > MapReduce Service > Troubleshooting
          • MRS Service Scenarios - MapReduce Service

            MRS Service Scenarios - MapReduce Service

            Offline data lake: collects and processes offline data from service systems, processes wide tables, uses HDFS or OBS for data storage, and uses Spark SQL as the data processing engine.

            Help > MapReduce Service > User Guide > MRS Cluster Planning > Service Selection
          • Before You Start - MapReduce Service

            Before You Start - MapReduce Service

            Public services, such as Elastic Cloud Server (ECS), Elastic Volume Service (EVS), Object Storage Service (OBS), Virtual Private Cloud (VPC), Elastic IP (EIP), and Image Management Service (IMS), are shared within the same region.

            Help > MapReduce Service > API Reference
          • MRS Security Hardening - MapReduce Service

            MRS Security Hardening - MapReduce Service

            and authentication Web application security Access control Audit security Password security Data security The following measures are provided to ensure the confidentiality, integrity, and availability of massive amounts of user data: Disaster recovery: MRS supports data backup to OBS

            Help > MapReduce Service > Service Overview > Functions
          • Creating a Cluster - MapReduce Service

            Creating a Cluster - MapReduce Service

            Constraints N/A Value range 0: Do not create an OBS bucket only for log collection when a cluster fails to be created. 1: Create an OBS bucket only for collect logs when a cluster fails to be created.

            Help > MapReduce Service > API Reference > API V2 > Cluster Management APIs
          • Commissioning a Kafka Application - MapReduce Service

            Commissioning a Kafka Application - MapReduce Service

            /opt/example/conf:/opt/example/kafka-examples-lib/* com.huawei.bigdata.kafka.example.Producer Observing the Running Result The running result of the JAR file of the sample program project can be viewed in the client.log file in the logs directory.

            Help > MapReduce Service > Developer Guide (Normal_Earlier Than 3.x) > Kafka Development Guide
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