Bit storage

IT bit storage offers:

• Three copies - one disk, two tape
• Monthly checks of disk-copy
• Checks every three year on tape copies while rewriting. Note: Tapes guarantee 15 years.
  • Possibly we could raise checks to once every year. Must find out what requirements are.

Access

• We can access the files through HTTP. IT will host the apache

• URL will be of type https://storage.statsbiblioteket.dk/<<storagetype>>/<<fileid>>

  • <<storagetype>> is the general storage collection the file belongs to

  • <<fileid>> may contain 'directories' with / delimiter

• We can implement authorization with an e-ticket in a cookie
• The Apache server will support HTTP/1.1, including asking for partial files
• We can get access to the MD5 checksum for stored files
• Files are available from disk storage, giving fast access times
• It will also be possible to have read-only shell access to files on rigel, if needed.

Store

• A script currently available to 'Statens Arkiver' can be extended to be used for us to store files
• We will give a directory/file and a storage location, and we will get an MD5 checksum back. When we acknowledge the checksum, the file is then read-only
• It will be possible to have storage areas with different bitstorage guarantees: 1 tape copy, 2 tape copies