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The amount of data in today’s marketplace is surging exponentially, along with the information it may put at your fingertips. To help you stay ahead of the curve and profit from countless potential edges, we developed new features that will drive your data at the speed of information.
RavenDB provides a lightning-speed service, along with data consistency that usually matches your users' needs whether their environment is a single server, a distributed cluster or a larger network.
Many environments allow some amount of inconsistency. A client may still comment on an article for example, when a newer version of it has already reached the server. In other cases, perfect consistency is needed even at the expense of immediate availability. This would be the case with concurrent clients that try to rent the same hotel suite for New Year's Eve: the server must inform them correctly about the suite's current status, go through the rental procedure with only one of them, and if the reservation isn't concluded - roll the transaction back and start again with a different client. Data consistency must be perfect.
RavenDB’s Optimistic Concurrency has made the prioritization of consistency over availability possible long ago, within the jurisdiction of a single server. The new Cluster-Wide Transactions feature expands this preference to any transaction within your distributed environment, allowing you to choose consistency over availability in a bigger scale or set high performance above all - as you wish.
Look into the future and become predictive with your data.
The extreme efficiency of Graph support in recognizing relationships between data elements and organizing them into searchable patterns, institutes their ability to manage huge, layered data volumes with intricate webs of relationships that relational databases can no longer handle.
A huge advantage unique to RavenDB is its ability to graph-query your data without forcing you to change its structure one bit. To those acquainted with graph terminology: your existing documents and collections are considered graph nodes, and the edges are inferred from the document contents - which allows both simple and complex edges RavenDB’s indexing mechanism and RQL language integrate effortlessly into the mix, laying the foundations for a solution as simple and intuitive as it is powerful.
Fix a database-scope mistake with ease.
How did your database look 20 hours or 4 days ago, just before some of your edge devices started feeding it with corrupted data?
Go back in time to fix things by reverting your entire database to what it looked like before specific events took place. Document changes will be undone, deleted documents restored and new documents removed.
Our existing Revisions feature is like a time tunnel through which you can visit earlier versions of a document and restore a chosen one. The new Revisions Revert feature expands the scope of your time travel to that of the entire database. Once the Revisions feature is enabled, you can revert the entire database to a chosen time point. Reverting documents rather than restoring the whole system also keeps this database-scope revert process as swift as a rhino’s gallop.
Revision Revert is an online operation; You do not need to bring your database down, RavenDB remains alive and well the whole time. It simply behaves like the distributed system it is, reverts the database on one of the nodes and replicates it to the others.
A data subscription is a cooperation between RavenDB and a subscribing client.
Subscriptions can be easily created using the Studio or API calls, and used for various needs. An accountant can subscribe for employees' paychecks for example, get all 50,000 already in the Paychecks collection at first, and then each new paycheck as it's entered or modified.
As long as matching documents are found in the database, the task retrieves and sends them to the client in batches, one batch at a time.
When all stored documents have been processed by the client, the subscription task examines documents as they arrive and forwards matching ones to subscribers immediately.