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At the time of writing it has not been decided which new history data system to use LCLS. The nominal EPICS archive protocol stack is given at leftin LCLS. Paul Chu reports reported that specific experiments in the SNS used PVlogger rather than EPICS archiver where possible, but that the archiver is used as a general history facility. It's not clear whether performance questions related to the EPICS archiver are specific to the archive browser, or to data retrieval in general.
The nominal system would be that below. The EPICS archiver protocol stack is given at left. The existing SLC history system is show at right; SLC history data can now be acquired by new applications or by matlab through Aida.
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