Apache Kylin : Analytical Data Warehouse for Big Data
Welcome to Kylin Wiki.
- Is Hadoop3 supported ?
- Kylin 4.0.0-alpha did not support Hadoop3.
- How to achieve Read/Write Separation Deployment?
- Please refer to Read Write Separation Deployment for Kylin 4.0.
- How to refresh the lookup table snapshot?
- It will be automatically refreshed the next time build.
- How to use the new garbage cleaning tool, which garbage will be cleaned up?
- To be updated
- Can Cube Planner be used?
- Not currently supported.
- Where is the dimension dictionary stored?
- Dimension dictionary is removed.
- What are the optimization methods for build engine?
- To be updated.
- What are the optimization methods for query engine?
- Please refer to Improve query performance by setting shard by column.
- Is Kylin 3.x and Kylin 4.x metadata compatible?
- Fully compatible.
- Is Kylin 3.x and Kylin 4.x cuboid data compatible? If not, will there be a migration plan?
- The pre-calculated cuboid data is completely incompatible, and there is no migration plan for the time being, due to relatively large effort in development.
- Is the Spark used by Kylin the community version?
- Spark 2.4.6 is currently supported.
- What features will no longer be supported in Kylin 4?
- Please refer to Kylin 4.X Feature List.
- What is the performance of query engine and build engine in Kylin 4?
- To be updated
- Will query results in Kylin 4 be consistent with the previous version?
- To be updated
- "Caused by: com.amazonaws.services.s3.model.AmazonS3Exception: Please reduce your request rate. (Service: Amazon S3; Status Code: 503; Error Code: SlowDown;"
- https://aws.amazon.com/premiumsupport/knowledge-center/emr-s3-503-slow-down/
- We can reverse the Kylin's working dir.
- How to develop UDF and UDAF?
- To be updated
- Does Kylin 4 support AWS Glue?
- To be updated
- Does query on Spark support Spark Schduler Pool setting(resource isolation)?
- What is the implementation of the new global dictionary?
- Please refer to Global Dictionary on Spark.
- How to store Metadata after not using HBase?
- Kylin supports JDBC to store Metadata, please refer to Use MySQL as Metastore and How to use HBase metastore in Kylin 4.0.
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