[JENA-214] Allow to set Fuseki (or a single dataset) in read-only mode (and eventually, back into read-write mode)

• Type: New Feature
• Status: Closed
• Priority: Minor
• Resolution: Won't Fix
• Component/s: Fuseki
• Assignee: Unassigned
• Reporter: Paolo Castagna
• Created: 22/Feb/12 20:18
• Updated: 05/Sep/14 13:20
• Resolved: 05/Sep/14 13:15

Description

A very useful MgtCmdServlet with commands such as: "backup", "shutdown", etc. is now available in Fuseki.
This is proposing a new command to set the server (or a single dataset) in read-only mode and back into read-write mode.
A use case for this would be to perform a replication via rsync, in order to replicate TDB indexes from server A to server B both servers needs to be set to read-only mode first, the replication can start, when it finishes both servers can be configured back to read-write mode.
Another use case would be, enabling a backup with an external tool or any other operation which needs to have exclusive access to TDB indexes and/or ensure all data has been flushed to disk and there are no in-flight write transactions.

See also a relevant message from jena-dev mailing list:

• http://mail-archives.apache.org/mod_mbox/incubator-jena-dev/201201.mbox/%3C4F1F1C9B.9050309%40apache.org%3E

Issue Links

• is superceded by: JENA-420 Web-based User Interface for Jena Fuseki
• relates to: JENA-201 Deliver Fuseki as a WAR file.