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In the Spark SQL table, there are often many small files (the size is much smaller than the HDFS block size). In this case, Spark will start more Task to process these small files. When there is a Shuffle operation in the SQL logic, will greatly increase the number of hash buckets, which will seriously affect performance.
In the Spark SQL table, there are often many small files (the size is much smaller than the HDFS block size). In this case, Spark will start more Task to process these small files. When there is a Shuffle operation in the SQL logic, will greatly increase the number of...
Which of the following statement about the BloomFilter feature of HBase is incorrect?
Which of the following statement about the BloomFilter feature of HBase is incorrect?A . Used to filter dataB . Used to optimize the performance of random readsC . Will increase the storage consumptionD . Can accurately determine that a piece of data does not existView AnswerAnswer: A
What processes are included in the HBase service of Fusionlnsight HD? (Multiple choice)
What processes are included in the HBase service of Fusionlnsight HD? (Multiple choice)A . HMasterB . SlaveC . HRegionServerD . Data NodeView AnswerAnswer: AC
The description of HBase Region Split splitting process, which is wrong?
The description of HBase Region Split splitting process, which is wrong?A . The split process does not really separate the files, just create a reference file.B . In order to reduce the size of the data in the Region, Split splits a Region into two Regions.C . The table will...
Fusionlnsight Manager supports multi-tenant unified management.
Fusionlnsight Manager supports multi-tenant unified management.A . TrueB . FalseView AnswerAnswer: A
Which of the following is the incorrect statement about the description of normal and external tables in Hive?
Which of the following is the incorrect statement about the description of normal and external tables in Hive?A . Create a normal table by defaultB . The external table essentially associates the file path on the existing HDFS with the table.C . Metadata and data are deleted at the same...
When using HBase for data read service in Fusionlnsight HD, you need to connect to HMaster.
When using HBase for data read service in Fusionlnsight HD, you need to connect to HMaster.A . TrueB . FalseView AnswerAnswer: B
ZooKeeper nodes use ACL to control access policies. ACL can be applied to any znode node in the cluster.
ZooKeeper nodes use ACL to control access policies. ACL can be applied to any znode node in the cluster.A . TrueB . FalseView AnswerAnswer: B
Huawei has rich experience in big data solutions in many industries such as finance, public security, railway and government affairs.
Huawei has rich experience in big data solutions in many industries such as finance, public security, railway and government affairs.A . TrueB . FalseView AnswerAnswer: A
Regarding the comparison between Hive and traditional data warehouse, which of the following description is wrong?
Regarding the comparison between Hive and traditional data warehouse, which of the following description is wrong?A . Hive is based on HDFS storage. In theory, the amount of storage can be expanded indefinitely, while the traditional data warehouse storage capacity has an upper limit.B . Because Hive is based on...
