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https://issues.apache.org/jira/browse/JENA-214?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Paolo Castagna updated JENA-214:
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Attachment: ActionReadOnly.java
This is my incomplete attempts at implementing this.
I failed to do it since I don't see:
- how to make a SPARQLServer going read-only and/or a single dataset
- how to wait for all the write transactions to finish
- how to ensure the journal as been applied to the database?
I am sharing this anyway, just in case others are interested in the same
feature and have useful suggestions/ideas.
> Allow to set Fuseki (or a single dataset) in read-only mode (and eventually,
> back into read-write mode)
> -------------------------------------------------------------------------------------------------------
>
> Key: JENA-214
> URL: https://issues.apache.org/jira/browse/JENA-214
> Project: Apache Jena
> Issue Type: New Feature
> Components: Fuseki
> Reporter: Paolo Castagna
> Priority: Minor
> Attachments: ActionReadOnly.java
>
>
> 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.
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