Release notes

This topic describes the release notes for the engine version of Time Series Database (TSDB). For more information about the version description and the download of TSDB SDK, see Version description.

V2.5.0 released on April 13, 2019

• TSQL is released. TSQL can make development easier. TSQL can be used to perform a wide range of computing operations on time series data. For example, TSQL can be used to join multiple metrics. In addition, TSQL provides more powerful analysis of multiple metrics for services. For more information, see Quick start for TSQL.

• TSDB for Prometheus is released. The remote storage adapter for Prometheus is added to the TSDB engine so that the engine can seamlessly connect to open source self-managed Prometheus services. This way, Kubernetes clusters can be monitored in a quick manner. TSDB for Promethues

V2.4.2 released on March 20, 2019

• The api/truncate operation is used to delete dirty data. For more information, see Clear data.

• Some stability issues are fixed.

V2.4.1 released on February 28, 2019

• The following issue is fixed: The integrity of retrieved data is compromised due to index updates.

V2.4.0 released on February 14, 2019

• The multi-value data model for time series data is released. Downsampling and aggregation of data for multiple metrics is supported. For more information, see Developer guide.

V2.3.8 released on January 24, 2019

• The tag parameter is used as an optional parameter when data is written. queries and writes without specified tags are supported.

• Queries without specified tags are optimized.

• Timeline queries are optimized to improve the stability of the queries.

• The following issue is fixed: The max field in your /api/dump_meta request does not take effect.

V2.3.3 released on November 27, 2018

Experience optimization

• The instances whose specifications range from mlarge to 24xlarge can be scaled up or down. These instances can also be scaled out.

• Auto-renewal is supported for TSDB instances. You can enable auto-renewal for TSDB instances that use the subscription billing method.

V2.3.1 released on October 20, 2018

• The time parameter can be configured in the query/last operation. This way, the latest business data generated before the specified point in time can be queried. Data timestamps are used to specify points in time.

• Milisecond granularity of data reads and writes is supported. The msResolution parameter controls the time granularity of data reads. By default, the value of the msResolution parameter is false. This value specifies that the time granularity for data writes is the same as the time granularity for data reads. If the msResolution parameter is set to true, the time granularity for all the returned data is milliseconds.

• The TSDB SDK supports filtering of multi-value data points. If multi-value data points are written using the TSDB SDK, the values of multiple metrics can be combined to filter the data and all of the values for these metrics are returned. For more information, see the topics related to TSDB SDK.

• The spatio-temporal feature is released. GPS data can be written, filtered, and analyzed. You can submit a ticket to use the feature for testing.

V2.3.0 released on October 9, 2018

New features

• The TSDB engine is upgraded. For 48xlarge and 96xlarge instances, data can be written to an unlimited number of timelines. For instances of other specifications, the supported number of timelines is increased to 10 times the original number of timelines.

V2.2.9 released on September 5, 2018

New features

• The time series insight feature is released. You can create time series insight events on the time series insight page of the TSDB console. This allows you to query and analyze time series data in a visualized way.

• The data for the demo of time series testing can be imported by using one click. You can perform interactive data queries and analysis without the need to develop code.

V2.2.8 released on August 10, 2018

New features

• Data generated at a single point in time can be queried.

• Data that uses the millisecond granularity can be read, written, or downsampled.

• The following time units of downsampling are added: the month unit and the year unit.

• The following two operators are added for data filling policies: near and after.

Fixed issues

• The following issue is fixed: Timeline monitoring data and disk monitoring data in the TSDB console is invalid.

• The following issue is fixed: Timeline metadata can still be retrieved after the timelines are cleared.

• The following issue is fixed: The type of read data is inconsistent with that of written data.

• The following issue is fixed: Monitoring data about write rates and disks is invalid.

V2.2.7 released on July 6, 2018

New features

• A new version of TSDB SDK is released. The new version of TSDB SDK can be used to write, query, and analyze multi-value data points.

V2.2.4 released on May 24, 2018

New features

• Data of the STRING and BOOLEAN data types can be written.

• The last operation is provided to obtain the data points generated in the latest period for a timeline.

Fixed issues

• The following issue is fixed: The result of deleting timelines is invalid in specific conditions.

V2.2.3 released on April 10, 2018

New features

• The O&M monitoring and alerting are added.

• TSDB can be connected to Realtime Compute for Apache Flink. Realtime Compute for Apache Flink offered by Alibaba Cloud provides a stream computing engine.

• The data visualization tool Grafana can be connected to TSDB.

• The billing method of an instance can be changed from pay-as-you-go to subscription in the TSDB console.

• The data query results can be returned by page.

• The following three data filling policies are added: linear, previous and fixed. linear represents linear interpolation. previous means that a value is interpolated based on the preceding value. fixed means that a fixed value is interpolated.

• Data points are filtered by metric value.

• Inverted indexes are supported.

• Abnormal query requests can be processed. These are requests that timed out and requests in which the specified parameters are invalid.

Optimized features

• Access to the pipeline aggregation engine is optimized.

• The limit on special characters in tag names and metric names is removed.

Fixed issues

• The following issue is fixed: Operations for clearing data and metric deletion do not take effect.

• The following issue is fixed: The Instances page in the TSDB console is not opened as expected.

• The following issue is fixed: Errors are reported for concurrent queries.

V1.2.0 released on February 7, 2018

Optimized features

• The stability of TSDB instances is optimized. The following issue is fixed: Services provided by TSDB instances are unstable when large queries are run.

• By default, the downsampled data for an instance is calculated by using the local time zone of the region where the instance is deployed.

Fixed issues

• The following issue is fixed: When you query tag values in the TSDB console, the tag values returned are incomplete.

V1.1.2 released on November 30, 2017

New features

• The getlastdp operation is provided to query the latest data values of time series.

• TSDB is available in the China (Shenzhen) region. This region has the following three zones: Zone A, Zone B and Zone C.

Optimized features

• The API operation that is used to delete timelines is optimized.

V1.1.1 released on November 16, 2017

New features

• TSDB can be accessed over the Internet or virtual private clouds (VPCs).

V1.1.0 released on November 3, 2017

New features

• TSDB Client for Java 1.0.0 is released. It provides a wide range of features, such as standard API operations, non-blocking I/O operations, instance protection, automated delivery of data in batches, and automated connection management.

• Timelines can be deleted by calling an API operation or by using the TSDB console. Millions of timelines can be deleted within a few seconds.

• Instances are protected. The number of data points in a single request can be specified to ensure instance availability.

• TSDB is available in the China (Qingdao) and China (Beijing) regions.

Optimized features

• Due to O&M automation, alerts can be automatically sent if instances become unavailable.

Fixed issues

• The following issue is fixed: An instance becomes unavailable due to a long query time range.

• The following issue is fixed: An instance becomes unavailable when the underlying API operations for asynchronous requests are incompatible.

V1.0.2 released on September 15, 2017

New features

• TSDB can be connected to Resource Access Management (RAM) so that Alibaba Cloud accounts, RAM users, and the permissions on instance resource management can be assigned based on your business requirements.

V1.0.1 released on August 28, 2017

New features

• TSDB can be connected to CloudMonitor. Alerts can be reported for the instance metrics that are monitored.

Optimized features

• The process of creating an instance is optimized. The Instances page shows the progress of an instance creation in real time.

• The instance configuration is optimized. The maximum number of tags for a single timeline is increased to 16.

Fixed issues

• The following issue is fixed: The name of an instance is not specified. However, after the instance is created, the instance name appears.

• The following issue is fixed: A curve for instance monitoring does not appear as expected.

• The following issue is fixed: An instance can be created when no VPCs are available, but the instance cannot be used.

V1.0.0 released on 2017 July 31

TSDB V1.0.0 is officially launched. This version can be used for public preview. TSDB V1.0.0 provides the following features:

• Time series data that complies with the OpenTSDB protocol can be read and written.

• Data can be highly compressed before the data is stored. The storage space of a single data point is less than 2 bytes.

• Data management system (DMS)

  • Data validity: Data validity periods can be customized. Data automatically becomes invalid after the customized data validity period ends. The expired data can be automatically deleted.

  • Data deletion: Useless data or dirty data can be automatically deleted to release the storage space.

  • Data query: Data can be randomly queried on the web UI.

• Instance monitoring alert

  • The following three core metrics can be monitored in the TSDB console in real time: write transactions per second (TPS), the total number of stored timelines, and storage space.

• Security

  • By default, TSDB instances can be accessed only over VPCs. This way, instance protection can be enhanced.

  • The instance access whitelist can be configured to protect your instance and ensure data security.