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Gravic Publishes New HPE Shadowbase Technical Brief on Managing Latency




gravic sep 20 - 1

Gravic recently published a new HPE Shadowbase Technical Brief on Managing Latency. One of the most critical aspects of data replication performance is latency, and this brief reviews the two most important types: replication latency and application latency.

Replication latency is the elapsed time between when a data change (e.g., insert, update, delete) is committed to the source system database, and when it is applied to the target database. It is the time period when the change data is in the replication pipeline and is affected by system utilization, process priorities, and network bandwidth.

This time period is very important to businesses, because it represents production change data that is not yet backed-up, and may be lost in the event of an outage of the source or target system. The longer this time interval is, the more data may be lost.

Application latency is only applicable when using the Shadowbase Zero Data Loss (ZDL) solution* or synchronous replication. When the source application calls transaction commit to make its data changes permanent, Shadowbase ZDL must ensure that the data changes are safe-stored on the target system before allowing the source transaction to commit. A consequence of this process is that the time taken for the source application’s transaction commit to complete may be extended. This additional commit time is known as the application latency.

Gravic Announces the Updated HPE Shadowbase ETL Toolkit

gravic sep 20 - 2

The HPE Shadowbase ETL Toolkit is used to extract database changes or initial load data into flat files for subsequent ETL loading into a target environment using comma-separated value (CSV), fixed-position, variable length, and tab-delimited formats. It can feed high-volume data quantities into a data warehouse, and row-based data into columnar databases. When coupled with HPE Shadowbase Online Loading (SOLV), the Toolkit can: extract select data from a source database; transform/cleanse it into the proper format; save it into flat files understood by the ETL utility; and load it into a target database environment not directly supported by Shadowbase replication. Using the Toolkit, source database change data can be periodically extracted from its audit trail, and processed into a flat file format for incremental loading into the target environment using a micro-batch incremental update approach to keep the target synchronized with the source. For more information, please read the solution brief.

Gravic and Shadowbase Support are Available During the Pandemic

We are concerned for all of our friends in the HPE and Connect communities and pray that they remain safe through this unprecedented and dangerous situation! For the duration of the COVID-19 pandemic, Gravic and its Shadowbase Products Group are open and operating with remote support and access. To reach Shadowbase Support, please use your normal Support contact information or use Support. Please use contact us for all other inquiries.

Hewlett Packard Enterprise globally sells and supports Shadowbase solutions under the name HPE Shadowbase. For more information, please contact your local HPE Shadowbase representative or visit our website. For additional information, please view our Shadowbase solution videos at

Specifications subject to change without notice. Trademarks mentioned are the property of their respective owners. Copyright 2020.