Interested to Buy Any Domain ? << Click Here >> for more details...
Why do I have to use refresh and invalidate metadata, what do they do?
- 1 Answers
- 63 Views
- I also Faced
- E-Mail Answers
Answer / Abhinav Srivastava
Refresh and invalidate metadata are used in Impala to update the cache of table metadata. Refresh updates the metadata for all tables, while invalidate metadata only affects specific tables. These commands are necessary when changes are made to the underlying HDFS or HBase data.
| Is This Answer Correct ? | 0 Yes | 0 No |
How do I configure hadoop high availability (ha) for impala?
What are impala built-in functions?
How much memory is required?
Does cloudera offer a vm for demonstrating impala?
What happens if there is an error in impala?
Is it possible to share data files between different components?
What are the main features of impala?
Does if offer scaling?
How do I load a big csv file into a partitioned table?
Can impala do user-defined functions (udfs)?
Why do I have to use refresh and invalidate metadata, what do they do?
What features from relational databases or hive are not available in impala?
-
Apache Hadoop (394) - MapReduce (354)
- Apache Hive (345)
- Apache Pig (225)
- Apache Spark (991)
- Apache HBase (164)
- Apache Flume (95)
- Apache Impala (72)
- Apache Cassandra (392)
- Apache Mahout (35)
- Apache Sqoop (82)
- Apache ZooKeeper (65)
- Apache Ambari (93)
- Apache HCatalog (34)
- Apache HDFS Hadoop Distributed File System (214)
- Apache Kafka (189)
- Apache Avro (26)
- Apache Presto (15)
- Apache Tajo (26)
- Hadoop General (407)
