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Releases: taosdata/TDengine

3.2.3.0

29 Feb 13:44
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New Features

  1. Count Window for stream processing. The starting and ending condition of a stream processing window is determined by the number of rows in the window
  2. TDengine monitoring
    • Refactored the metrics collected by taosd service, and refined the Grafana dashboard for monitoring taosd services
    • Collected rich metrics for taosX service, and designed new Grafana dashboard for monitoring resource usage, taosX services, agents, and data in tasks of various data source types
  3. New License Mechanism
    • Advanced database features need to be granted, a single license key can grant the fundamental database and/or one or more advanced features
    • Data in features need to be granted, a single license key can grant one or more data source types
  4. Data In: Wonderware Historian data can be ingested into TDengine
  5. Data Compression between taosX-Agent and taosX to save bandwidth in case they are not in same network

Improvements

  1. Performance improvemnt
    • The cache for last is built when creating super tables and child tables to improve the performance of querying last() or last_row() the first time
    • The cache for last can be utilized when querying both last() and last_row() together in a single SQL statement
    • The performance of querying last_row() when there is a column full of NULL values is improved significantly
    • Performance improvement when transferring data from Pi/OPC to TDengine
    • Performance improvement when transferring data from TDengine 2.6 to TDengine 3.x in case there are millions of tables but each table only has few rows
  2. Query optimization
    • Query statement "select count(*)" can filter out empty tables
  3. System Operations
    • The impact on data writing when performing "redistribute vgroup" operation is minimized using RAFT learner mechanism
    • Command "restore vnode" can be performed on a single vgroup ID
    • An empty dnode, i.e. without any vnode, can be dropped by force, regardless of online or not
  4. Data In Optimizations
    • The initial timestamp can be ignored when writing into TDengine from OPC
    • Advanced options are consolidated and refined for some data source types
    • More options, such as skipRows, delimiter, quoteChar, commentPrefix, have been added for CSV data source
  5. Explorer
    • support HTTPS
    • Users can view task related logs

What's Changed

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3.2.2.0

22 Dec 01:19
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New Features

  1. Data compacting operations can be queried and killed (Enterprise only)
  2. Simple Storage Service or Object Storage Service (aka S3) can be used at the last tier of multi-tier storage (Enterprise only)
  3. Stream processing supports Event Window
  4. TDenginer server supports Windows/x64 platform (Enterprise only)
  5. ODBC driver

Improvements

  1. Performance improvement for some query scenarios, like partition by and sorting for super tables
  2. Adaptive API for BI tool integration
  3. Performance improvement for snapshot transfer, which accelerates the speed of redistributing vgroup or altering replica
  4. Floating point numbers can be written into columns of integer type

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3.2.1.0

17 Nov 06:55
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New Fetures:

  • View
  • Optimized query for BI tool integration
  • Optimized data recovery when one disk is disrupted using multi-level storage

Improvements

  • Performance optimization when querying last()/last_row() with primary key or other functions together

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3.2.0.0

30 Oct 02:18
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New Features

  1. IP White List
  2. Configurable floating point lossy compression
  3. balance vgroup leader for a specific vgroup

Improvements

  1. Performance optimization for partition by column
  2. Performance optimization for partition by column with limit/slimit
  3. Performance optimization for partition by column with interval
  4. Block leve lcache for retrieving data on S3
  5. Split vgroup and redistribue vnode with existing of data subscription

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3.1.1.4

20 Sep 03:56
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Fixed bugs:

  1. core dump when selecting ins_tables
  2. replica data size is much bigger than expected when executing split vgroup
  3. wrongly removing other components in install.sh and rmtaos

What's Changed

Full Changelog: ver-3.1.1.1...ver-3.1.1.4

3.1.1.1

11 Sep 15:03
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Fixed bugs found on ARM64 and Kylin OS

What's Changed

Full Changelog: ver-3.1.1.0...ver-3.1.1.1

3.1.1.0

03 Sep 13:35
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New Features/Improvements

  • Stream processing can be used in database with 3 replica
  • Join performance optimization
  • Performance improvement for interval + limit
  • Audit log (TDengine Pro only)

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3.1.0.3

28 Aug 01:49
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Fixed bugs

  • It took too long when upgrading from lower versions to 3.1.0.2 in some cases
  • Some query issues

What's Changed

Full Changelog: ver-3.1.0.2...ver-3.1.0.3

3.1.0.2

22 Aug 10:13
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Fixed Bugs

  • taosd crash in some query scenarios
  • data subscription: position() get same offset after two pols() with data
  • interp: data out of specified time range is returned
  • show create table: additional "sma()" is returned in the SQL
  • alter the length of VARCHAR failed

What's Changed

Full Changelog: ver-3.1.0.1...ver-3.1.0.2

3.1.0.0

10 Aug 03:37
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Note: Once you upgrade to this release, you can't go back to old version
Note: Please must drop streams before upgrading

  1. New Features & Improvements
  • Performance improvement for Join
  • Performance improvement for order by non-primary key + limit
  • Performance and memory usage improvement for stable order by primary key + limit
  • Performance improvement for counting out of order data
  • Improved fault tolerance when disk is broken
  • New data type: Geometry
  • Stream with fill history can be paused/resumed
  • Load balance among level 0 disks (Enterprise only)
  • Performance improvement in high cardinality case (Enterprise only)
  • Compacting data doesn't block writing (Enterprise only)
  • Data retention in multi-level storage doesn't block writing (Enterprise only)
  1. Fixed Bugs
  • Fixed some bugs found in previous releases

What's Changed

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