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# Chapter 31. Recommendations for Cluster Deployment

1. All nodes in the cluster should have a synchronized system date-time.

2. All nodes share sandboxes stored on a shared or replicated filesystem. The filesystem shared among all nodes is single point of failure. Thus, the use of a replicated filesystem is strongly recommended.

3. All nodes share a DB, thus it must support transactions. I.e. The MySQL table engine, MyISAM, may cause strange behaviour because it is not transactional.

4. All nodes share a DB, which is a single point of failure. Use of a clustered DB is strongly recommended.

5. Configure the license by "license.file" property or upload it in the Web GUI, so it's stored in the database. Do not use `clover-license.war`.

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