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What is the best way to have read-only access a Xodus database (that is already open) that is without Xodus throwing lock error.

The idea is two separate process is accessing the database, one process is with read/write and other is just read only.

quarks
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  • This is the line that throws lock error: final PersistentEntityStore store = PersistentEntityStores.newInstance(xodusRoot + dir); – quarks Sep 26 '18 at 12:40

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A single Xodus database can't be shared by multiple processes. From the Xodus wiki:

This method opens an existing database or creates a new database in the directory that is passed as a parameter. It is not possible to share a single database directory between different environments. Any attempt to do this (from within any process, current or not) fails.

There is an open feature request to add this functionality.

Danny MacMillan
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