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DB2 Setup and Best Practices Connection Information In addition to a hostname or IP and port, you will also need to provide the name of the DB2 database to which you are connecting. Resource Allocation Considerations For RDBMS sources like DB2, Dremio's query execution is largely single threaded. This means that for each DB2 directed query, only one Dremio node will experience a computational load. So unlike most other data sources, larger Dremio clusters won't lead to faster individual query execution times.
Join Cris Ippolite for an in-depth discussion in this video Connect to PostgreSQL and IBM DB2 using the ESS adapter, part of FileMaker 15 Platform New Features. Dec 8, 2006 - Tableau Professional Edition Version 2.1, published by Tableau Software, outdoes. RELATED: Review: Four ways to manage Macs in a Microsoft world. After opening a new Tableau workbook, you connect to a data source. MS Analysis Services, Oracle, Hyperion Essbase and IBM DB2 OLAP Server. I have had the same issue, connecting to a local instance of PostgreSQL. I think the PostgreSQL instance will need to be configured for SSL using OpenSSL, although Im not yet sure how to do that.
However, if you expect a large number of concurrent queries (as in the case of many simultaneous Dremio users) these will be distributed evenly across the nodes. NOTE: Ensure that your Dremio cluster has access to the appropriate port for your DB2 source. By default this is port 50000. Dremio and DB2 Query Pushdowns For some operations Dremio can tell the data source to execute that part of the query natively, often dramatically improving performance.
These operations are called 'pushdowns.' Since they share a common language (SQL), Dremio supports most operations as pushdowns in DB2. These include:. Filter (SQL: WHERE). Limit (SQL: LIMIT).
Sorting (SQL: ORDER BY). Aggregation (SQL: GROUP BY). Project (with expressions) (e.g. SQL: SELECT columnA + columnB, columnC, columnD) NOTE: Since DB2 tables have no boolean type, project operations that contain SQL expressions which evaluate to true or false (e.g. SELECT username, friends 0), and filter operations that include boolean literals in a filter (e.g.
Ibm Db2 Features
WHERE currentAccount = true) cannot be executed as pushdowns. Initial Connection Depending on the number of tables in your DB2 source, the final step of adding it to Dremio can take anywhere from a few seconds to a few minutes as the source's metadata is processed. However, this is a one-time cost and further queries to the source will not incur additional metadata reads. Dremio Configuration Here are all available source specific options: Name Description Host DB2 host name. Port DB2 port number. Defaults to 50000. Database Database name.
Username DB2 user name. Password DB2 password.
Authentication Type No authentication or Master Authentication. Record Fetch Size Record fetch size, use 0 to have Dremio automatically decide.