System Configuration > Archive Support

The ImageServer has an extensible interface for handling archiving of studies for long term storage. The only currently supported archiving mechanism is a hierarchical storage management (HSM) style archive. An HSM archive abstracts away archival media devices such as tape jukeboxes into a filesystem where files can be copied to and from. Common HSM archive software packages are the Sun StorageTek Storage Archive Manager and the EMC DiskXtender.

ImageServer archives are associated with each partition configured on the ImageServer. Archiving of studies works in conjunction with disk management. Studies that are not scheduled for deletion are archived. Because archiving is associated with server partitions, it is possible to create a partition that does not archive data acting as a temporary cache, and have a second partition that does archive data.

Restoring

Nearline studies will be restored from the archive if they are requested via DICOM or Streaming. Online studies can also be restored (overwritten with the copy from the archive) manually from the Study Search screen.

Lossy Compression and Archiving

When a rule is defined for lossy compression, and a study was archived before it was lossy compressed, it is possible to restore the archived version of the study to get back to the lossless version of the study. The ImageServer keeps track of the current transfer syntax of a study and the transfer syntax that the study was archived as.

Archiving and Edits

If a study is edited and has already been archived, this will trigger the study to be rearchived.