數據虛擬化系統 Teiid 7.6 Final 發布

Teiid是一個數據虛擬化系統，讓應用程序使用來自多個異構數據存儲的數據。

Teiid由一堆工具，組件和創建和執行雙向數據的服務所組成。通過抽象和聯合、數據存取和集成的實時分布式數據源，無需進行復制或以其他方式移動數據系統的紀錄。

Teiid 7.6 正式版終于發布了，7.6 主要的亮點有：

• Procedure language features - Added support for compound/block statements, BEGIN [[NOT] ATOMIC], loop/block labels, and the leave statement. See the reference for more.
• File Enhancements - the file translator can now optionally (via the ExceptionIfFileNotFound property) throw an exception if the path refers to a file that doesn't exist. The file resource adapter can be configured to map file names and can prevent parent path .. references. See the Admin Guide or the file-ds.xml template for more.
• TEXTTABLE Enhancements - TEXTTABLE can now parse fixed width files that do not use a row delimiter and can optionally produce fixed values that haven't been trimmed.
• Temp table transactions - Internal materialized views and temp table usage from a session and within procedures can take advantage of greater transaction support.
• Buffering Improvements
  
  • Added the ability to inline memory based or small lobs.
  • Added tracking of the memory held by soft references and general batch overhead. This ensures more efficient cache/memory utilization when dealing with 10s of millions or more of batches/pages.
  • Also switched to a concurrent LFRU algorithm that significantly reduces writes and read misses with temporary tables.
  • Added a memory buffer to better handle file storage as fixed blocks. The memory buffer may optionally be configured as off-heap for better large memory performance - see the Admin Guide for more.
  • Serialization was improved for both internal batches and client/server batches.
• GSSAPI - both the Teiid JDBC client/server and the ODBC pg backend can now support GSSAPI for single sign-on.
• Server-side Query Timeouts - default query timeouts can be configured at both the VDB (via the query-timeout VDB property) and entire server (via the teiid-jboss-beans.xml queryTimeout property).
• Native Queries - added the ability to specify native query SQL for JDBC physical tables and stored procedures via extension metadata. See the Reference for more.
• View removal hint - the NO_UNNEST hint now also applies to FROM clause views and subqueries. It will instruct the planner to not perform view flattening.
• Non-blocking statement execution - Teiid JDBC extensions TeiidStatement and TeiidPreparedStatement can be used to submit queries against embedded connections with a callback to process results in a non-blocking manner.
• NON_STRICT limit hint - the NON_STRICT hint can be used with unordered limits to tell the optimizer to not inhibit push operations even if the results will not be consistent with the logical application of the limit.
• Source Hints - user and transformation queries can specify a meta source hint, e.g. SELECT /*+ sh my-oracle:'leading' */ * FROM TBL. The hint information will be passed to the translator. The Oracle translator will by default treat the source hint as an Oracle hint. See the Reference and Developers Guide for more.
• Hive Translator - Hive translator has been added as a technology preview.

下載地址：http://www.jboss.org/teiid/downloads.html