Descriptions of terms used in the Netarchive software. The terms are listed in alphabetic order

Active Bit Preservation

• Active bit preservation means that the bits are actively monitored. Depending on the Quality of Service level this will give different requirements for the configuration of the archive in question. In the Danish installation of NetarchiveSuite we have the following configuration:

  • Two bitarchive locations representing copies of the data objects to be preserved (in order to be able to recover a bit error in a data object).
  • The two bitarchive locations are placed on separate physical locations (in order to have a copy in case of fire, floods, earth crake etc.).
  • One checksum location giving the number of three voting object locations (which is minimum number for the voting to make sense).
  To have a higher quality level for the active bit preservation more requirements will be needed.
• Please also refer to term Bitarchive Location.
• Please also refer to term Checksum Location.
• Please also refer to term Quality of Service Level. Please also refer to figure under term Repository.

Bitarchive

• One or more machines holding one copy of the data harvested by a NetarchiveSuite installation.

Development release

• Internal development release. Can be used for experiments.

Event harvest

• A selective harvest made at special events.

Full harvest

• See Snapshot harvest.

Partial harvest

• See Selective harvest.

Release

• See Stable Release or Development release

Selective harvest

• A harvest of a few, selected sites that can be done repeatedly.

Snapshot harvest

• A limited-depth harvest of all domains known in the system. A snapshot harvest can only be run once, but can be based on an earlier snapshot harvest, harvesting only those domains that were not fully harvested in the previous harvest.

Stable Release

• Stable release of NetarchiveSuite SW.