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[Iceberg] Iceberg Guide Book Summary | CHAPTER 5. Iceberg Catalogs
CHAPTER 5 Iceberg Catalogs Requirements of an Iceberg CatalogIceberg provides a catalog interface that requires the implementation of a set of functions, primarily ones to list existing tables, create tables, drop tables, check whether a table exists, and rename tables. Hive Metastore, AWS Glue, and a filesystem catalog (Hadoop). with a filesystem as the catalog, there’s a file called version-hi..
[Iceberg] Iceberg Guide Book Summary | CHAPTER 4. Optimizing the Performance of Iceberg Tables
CHAPTER 4 Optimizing the Performance of Iceberg TablesCompaction When you are querying yourApache Iceberg tables, you need to open and scan each file and then close the filewhen you’re done. The more files you have to scan for a query, the greater the costthese file operations will put on your query. it is possible to run intothe “small files problem,” where too many small files have an impact o..