Release notes

This topic describes the release notes for the engine versions of Lindorm 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 is a structured query language that is used in TSDB. TSQL makes development easy. 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. TSQL also provides powerful capabilities for analyzing business metrics. 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 the open source self-managed Prometheus service. This way, you can efficiently monitor Kubernetes clusters. TSDB for Promethues

V2.4.2 released on March 20, 2019

• The api/truncate operation is used to clean dirty data. For more information, see Clean 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 negatively affected 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 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. Data queries and writes without specified tags are supported.

• Queries without specified tags are optimized.

• Timeline queries are optimized to make queries stable.

• 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 scaled down. These instances can also be scaled out or scaled in.

• 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 for 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.

• Millisecond granularity of data reads and writes is supported. The msResolution parameter specifies the time granularity of data reads. By default, the value of the msResolution parameter is false. The value false 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 returned data is milliseconds.

• TSDB SDK supports filtering of multi-value data points. If multi-value data points are written by using 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 updated. For 48xlarge and 96xlarge instances, the number of timelines that can be written is unlimited. For instances of other specifications, the maximum number of timelines that can be written is increased to 10 times the original maximum number of timelines.

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: month and year.

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

Fixed issues

• The following issue is fixed: The monitoring data of time series and disks is invalid.

• The following issue is fixed: The metadata of time series can still be retrieved after the time series are cleared.

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

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

V2.2.7 released on July 6, 2018

New features

• TSDB SDK is updated. The updated 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 query the latest data point in a time series.

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 instances can be connected to Realtime Compute for Apache Flink. Realtime Compute for Apache Flink provides a stream computing engine.

• TSDB instances can be connected to Grafana. Grafana is a tool that is used to visualize data.

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

• The 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. This includes the requests that timed out and requests in which the specified parameters are invalid.

Optimized features

• Access to the pipeline aggregation engine is optimized.

• The limits on special characters in tag names and metric names are removed.

Fixed issues

• The following issue is fixed: The operations for deleting data or metrics do not take effect.

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

• The following issue is fixed: An error is returned when you run 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 based on 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 returned tag values 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. The China (Shenzhen) region has 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

• A TSDB instance can be accessed over the Internet or a virtual private cloud (VPC).

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 performing operations in the TSDB console. Millions of timelines can be deleted within a few seconds.

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

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

Optimized features

• Automated O&M is supported. 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 because the underlying API operations for asynchronous requests are incompatible.

V1.0.2 released on September 15, 2017

New features

• TSDB can connect to Resource Access Management (RAM) so that Alibaba Cloud accounts, RAM users, and the permissions on instance resources can be managed.

V1.0.1 released on August 28, 2017

New features

• TSDB can be connected to CloudMonitor. Alert notifications can be sent based on the instance metrics that are monitored.

Optimized features

• The process for creating an instance is optimized. The Instances page shows the progress for creating an instance 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 if no VPCs are available, but the instance cannot be used.

V1.0.0 released on July 31, 2017

TSDB V1.0.0 is officially released in 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 that is required for a single data point is less than 2 bytes.

• Data Management (DMS)

  • Data validity: Data validity periods can be customized. Data automatically becomes invalid after the customized data validity period ends. The expired data is 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: the number of write operations per second, the total number of stored timelines, and the used storage.

• Security

  • By default, TSDB instances can be connected only over VPCs. This secures instance connections.

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