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archiver-appliance / epicsarchiverap

This is an implementation of an archiver for EPICS control systems that aims to archive millions of PVs.
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Retrieval of deleted data #180

Closed GDH-ISIS closed 9 months ago

GDH-ISIS commented 9 months ago

Using the BPL api, we have worked out that PVs that have changed type can be paused, consolidated, renamed to a different name, deleted (keeping the data) and finally ask for the PV to be archived once more using the original name. The new archived data then looks to have the correct name and type (as recommended https://slacmshankar.github.io/epicsarchiver_docs/admin.html). However, may I ask whether it is possible to retrieve the old data that is now under a different name using the BPL api. The files look to be present in the storage area, but not in any of the PV lists. Any advice would be appreciated.

jacomago commented 9 months ago

Yes, there are two solutions:

Feature org.epics.archiverappliance.retrieval.SearchStoreForRetiredPvs in the archappl.properties file for searching for retired PVs. PVs that are not longer being archived.

Some other options in https://slacmshankar.github.io/epicsarchiver_docs/api/mgmt_scriptables.html include the

For changing names of PVs that you are archiving.

GDH-ISIS commented 9 months ago

My apologies for not having read this sooner. This looks like just what I am looking for. Much appreciated.