Let’s explore more about data rebalancing in Apache Ignite. Bobcares, as a part of our Server Management Services, offers solutions to every Apache query that comes our way.

Data rebalancing in Apache Ignite

Some of the partitions are moved to the new node when a new node enters the cluster in order to maintain an even distribution of the data throughout the cluster. Data rebalancing is the name of this procedure.

If backups are not set up and an existing node departs the cluster permanently, we lose any partitions stored on that node. When backups are set up, the rebalancing process is started and one of the backup copies of the lost partitions is made the primary partition. Rebalancing can be set up for each cache.

How to set up Data rebalancing in Apache Ignite?

Both synchronous and asynchronous rebalancing are supported by Ignite. Any operation on the cache data is halted in the synchronous mode until the rebalancing is complete. Rebalancing is carried out asynchronously in the asynchronous mode. Rebalancing can also be turned off for a specific cache. Set one of the following values in the cache configuration to alter the rebalancing mode.

1. SYNC

2. ASYNC

3. NONE

How to set up Rebalance Thread Pool

Rebalancing is typically carried out in a single thread on each node. It indicates that only one thread is used at any given moment to process batches coming from the remote node or to move batches from one node to another.

We can increase the quantity of threads utilised for rebalancing that are taken from the system thread pool. Every time a node has to send a batch of data to another node in the network or wants to process a batch of data that came from another node in the network, a system thread is taken from the pool. After processing the batch, the thread is terminated.

How to set up Rebalance Message Throttling

The entire data set is divided into batches and sent in its own message when data is moved from one node to another. The batch size and the interval the node waits between messages are configurable.

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Conclusion

To sum up, our article explains about the way to set up data rebalancing in Apache Ignite.