Skip to content

Latest commit

 

History

History
379 lines (261 loc) · 20.8 KB

README.md

File metadata and controls

379 lines (261 loc) · 20.8 KB

Database Preservation

Relational databases are one of the most important technologies supporting today’s information management activities. They are designed to store, organize and explore digital records that not only support but also document day-to-day business operations. Very often, these records are irreplaceable or prohibitively expensive to reacquire by other means rendering the preservation of databases a serious concern.

This page focus on workflows, tools and standards to allow information managers to extract, archive and preserve records of information currently managed by relational databases.

The most relevant initiatives in this context are the Database Preservation Toolkit, the Database Visualization Toolkit and the SIARD 2.0 preservation format.

The following screencast aims to illustrate how all these tools fit together in a full-cycle archiving and preservation workflow for relational databases.

Database preservation workflow screencast

More detailed information about these tools and standards can be found on the following sections.

RODA – A digital repository made for preservation

RODA is a complete digital repository solution that delivers functionality for all the main functional units of the OAIS reference model. RODA is capable of ingesting, managing and providing access to the various types of digital content produced by large corporations or public bodies. RODA is based on open-source technologies and is supported by existing standards such as the Open Archival Information System (OAIS), Metadata Encoding and Transmission Standard (METS), Encoded Archival Description (EAD), Dublin Core (DC) and PREMIS (Preservation Metadata).

For more information please visit https://github.com/keeps/roda

RODA-in – The ultimate SIP creation tool

RODA-in is a tool specially designed for producers and archivists to create Submission Information Packages (SIP) ready to be submitted to an Open Archival Information System (OAIS). The tool creates SIPs from files and folders available on the local file system.

In version 2 we revolutionized the way SIPs are created to satisfy the need for mass processing of data. In this version you can create thousands of valid SIPs with just a few clicks, complete with data and metadata.

The tool includes features such as:

  • Create, load and edit classification schemas
  • Automatic association of files/folders to SIP
  • Automatic association of metadata to SIP
  • Definition of metadata templates
  • Support for various metadata formats (EAD, DC, etc.)
  • Creation of SIP of unlimited size
  • Creation of SIP in various formats: BagIt and E-ARK

For more information please visit https://github.com/keeps/roda-in

Database Preservation Toolkit

The Database Preservation Toolkit allows conversion between Database formats, including connection to live systems, for purposes of digitally preserving databases. The toolkit allows conversion of live or backed-up databases into preservation formats such as SIARD, a XML-based format created for the purpose of database preservation. The toolkit also allows conversion of the preservation formats back into live systems to allow the full functionality of databases.

This toolkit was part of the RODA project and now has been released as a project by its own due to the increasing interest on this particular feature. It is now being further developed in the EARK project together with a new version of the SIARD preservation format.

The toolkit is created as a platform that uses input and output modules. Each module supports read and/or write to a particular database format or live system. New modules can easily be added by implementation of a new interface and adding of new drivers.

EARK and SIARD 2.0

A new version of the this tool, together with a new version of the SIARD preservation format, is currently being designed and developed on the EARK project. Meanwhile, if you'd like to know more and even send us use cases and requirements, contact us.

Database Visualization Toolkit

The Database Visualization Toolkit is a lightweight web viewer for relational databases, specially if preserved in SIARD 2, that uses SOLR as a backend, and allows browsing, search, and export. It uses the Database Preservation Toolkit to process new relational databases that are in the SIARD2 format or on the original live DBMS.

For more information please visit http://visualization.database-preservation.com

Requirements

To use the program, Java 21 or higher needs to be installed. Instructions on how to do this are available at https://docs.oracle.com/en/java/javase/21/install/overview-jdk-installation.html.

How to use

To use the program, open a command-line and try out the following command (replace x.y.z accordingly to the version of the binary in use):

java --add-opens java.xml/com.sun.org.apache.xerces.internal.jaxp=ALL-UNNAMED -jar "-Dfile.encoding=UTF-8" dbptk-app-X.Y.Z.jar

NOTE: Getting WARN could not get type for name javax.xml.bind.annotation.adapters.XmlAdapter from any class loader issue? See workaround.

Using this command you will be presented with the application usage, describing all supported modules and their parameters. This information is also available in the application usage page.

To use the application an input and an output module must be selected and some configuration parameters must be provided.

Supported Database Management Systems and Preservation formats

The Database Preservation Toolkit supports the following Database Management Systems:

  • MySQL/MariaDB
  • PostgreSQL
  • Oracle
  • Microsoft SQL Server
  • Microsoft Access
  • Progress OpenEdge
  • Sybase ASA
  • And other databases (using JDBC)

Database Preservation Toolkit can convert any of the above DBMS to the following preservation formats:

  • SIARD 1
  • SIARD 2
  • SIARD DK

The Database Preservation Toolkit is also capable of loading preserved databases into any of the above DBMS.

Examples

If you want to connect to a live MySQL database and export its content to SIARD 2.0 format, you can use the following command.

java -jar "-Dfile.encoding=UTF-8" dbptk-app-x.y.z.jar migrate --import mysql --import-hostname=localhost --import-database="example_db" --import-username=username --import-password="p4ssw0rd" --export siard-2 --export-file=example.siard

Or using the equivalent short version of the parameters:

java -jar "-Dfile.encoding=UTF-8" dbptk-app-x.y.z.jar migrate -i mysql -ih localhost -idb "example_db" -iu username -ip "p4ssw0rd" -e siard-2 -ef example.siard

More examples containing only required parameters:

Oracle to SIARD 2

java -jar "-Dfile.encoding=UTF-8" dbptk-app-x.y.z.jar migrate --import oracle --import-server-name=127.0.0.1 --import-instance="instance" --import-username=username --import-password="p4ssw0rd" --import-port-number=1521 --import-accept-license --export siard-2 --export-file=example.siard

MySQL to SIARD 2

java -jar "-Dfile.encoding=UTF-8" dbptk-app-x.y.z.jar migrate --import mysql --import-hostname=localhost --import-database="example_db" --import-username=username --import-password="p4ssw0rd" --export siard-2 --export-file=example.siard

PostgreSQL to SIARD 2

java -jar "-Dfile.encoding=UTF-8" dbptk-app-x.y.z.jar migrate --import postgresql --import-hostname=localhost --import-database="example_db" --import-username=username --import-password="p4ssw0rd" --export siard-2 --export-file=example.siard

Microsoft SQL Server to SIARD 2

java -jar "-Dfile.encoding=UTF-8" dbptk-app-x.y.z.jar migrate --import microsoft-sql-server --import-server-name=localhost --import-database="example_db" --import-username=username --import-password="p4ssw0rd" --export siard-2 --export-file=example.siard

The conversion in the opposite direction is also possible, check the complete application usage to know more about the supported modules and respective configurations.

How to use JDBC import and export modules

To use Database Preservation Toolkit with an unsupported database, one can connect by providing the name of the JDBC driver class (and adding the JDBC driver to the classpath) and the JDBC connection string. The steps to run Database Preservation Toolkit this way are as follows:

  1. Obtain the JDBC driver for the database you want to use (this is typically a file with jar extension). For Oracle12C this file can be downloaded from http://www.oracle.com/technetwork/database/features/jdbc/index-091264.html;
  2. Identify the driver class. For Oracle 12C this would be something like oracle.jdbc.driver.OracleDriver;
  3. Prepare the connection string. For Oracle 12C this could be something like jdbc:oracle:thin:username/password@serverName:port/database;
  4. Run Database Preservation Toolkit by providing files to add to the classpath and the main entry point.

Please be aware that using this method the conversion quality cannot be assured, as it depends on the used driver. Furthermore, non-tested drivers are more prone to possible errors during the conversion. A specialized module for the database, if available, would always be preferable to this generic JDBC module.

Example to convert from Oracle to SIARD2:

Using the method described above, the Windows command to extract a database from an Oracle database to SIARD 2 is as the following:

java -cp "C:\path\to\dbptk-app-x.y.z.jar;C:\path\to\jdbc_driver.jar" com.databasepreservation.Main migrate --import=jdbc --import-driver=oracle.jdbc.driver.OracleDriver     --import-connection="jdbc:oracle:thin:username/password@serverName:port/database"   -e siard-2 -ef C:\path\to\output.siard

And on Linux the equivalent command would be (note that the jarfile separator is : instead of ;):

java -cp "/path/to/dbptk-app-x.y.z.jar:/path/to/jdbc_driver.jar" com.databasepreservation.Main migrate --import=jdbc --import-driver=oracle.jdbc.driver.OracleDriver     --import-connection="jdbc:oracle:thin:username/password@serverName:port/database"   -e siard-2 -ef /path/to/output.siard

Related publications & presentations

Other related publications:

Troubleshooting

Troubleshooting information can be found in a separate Troubleshooting page.

Information & Commercial support

Database Preservation Toolkit logos can be downloaded here.

For more information or commercial support, contact KEEP SOLUTIONS.

Developers

To develop new components for DBPTK check the Developer notes which has information on:

  • How to build from the source code
  • How to make a new release
  • How to set up the development environment
  • Code structure
  • How to contribute
  • etc.

License

Database Preservation Toolkit licence is LGPLv3

                   GNU LESSER GENERAL PUBLIC LICENSE
                       Version 3, 29 June 2007

 Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
 Everyone is permitted to copy and distribute verbatim copies
 of this license document, but changing it is not allowed.


  This version of the GNU Lesser General Public License incorporates
the terms and conditions of version 3 of the GNU General Public
License, supplemented by the additional permissions listed below.

  0. Additional Definitions.

  As used herein, "this License" refers to version 3 of the GNU Lesser
General Public License, and the "GNU GPL" refers to version 3 of the GNU
General Public License.

  "The Library" refers to a covered work governed by this License,
other than an Application or a Combined Work as defined below.

  An "Application" is any work that makes use of an interface provided
by the Library, but which is not otherwise based on the Library.
Defining a subclass of a class defined by the Library is deemed a mode
of using an interface provided by the Library.

  A "Combined Work" is a work produced by combining or linking an
Application with the Library.  The particular version of the Library
with which the Combined Work was made is also called the "Linked
Version".

  The "Minimal Corresponding Source" for a Combined Work means the
Corresponding Source for the Combined Work, excluding any source code
for portions of the Combined Work that, considered in isolation, are
based on the Application, and not on the Linked Version.

  The "Corresponding Application Code" for a Combined Work means the
object code and/or source code for the Application, including any data
and utility programs needed for reproducing the Combined Work from the
Application, but excluding the System Libraries of the Combined Work.

  1. Exception to Section 3 of the GNU GPL.

  You may convey a covered work under sections 3 and 4 of this License
without being bound by section 3 of the GNU GPL.

  2. Conveying Modified Versions.

  If you modify a copy of the Library, and, in your modifications, a
facility refers to a function or data to be supplied by an Application
that uses the facility (other than as an argument passed when the
facility is invoked), then you may convey a copy of the modified
version:

   a) under this License, provided that you make a good faith effort to
   ensure that, in the event an Application does not supply the
   function or data, the facility still operates, and performs
   whatever part of its purpose remains meaningful, or

   b) under the GNU GPL, with none of the additional permissions of
   this License applicable to that copy.

  3. Object Code Incorporating Material from Library Header Files.

  The object code form of an Application may incorporate material from
a header file that is part of the Library.  You may convey such object
code under terms of your choice, provided that, if the incorporated
material is not limited to numerical parameters, data structure
layouts and accessors, or small macros, inline functions and templates
(ten or fewer lines in length), you do both of the following:

   a) Give prominent notice with each copy of the object code that the
   Library is used in it and that the Library and its use are
   covered by this License.

   b) Accompany the object code with a copy of the GNU GPL and this license
   document.

  4. Combined Works.

  You may convey a Combined Work under terms of your choice that,
taken together, effectively do not restrict modification of the
portions of the Library contained in the Combined Work and reverse
engineering for debugging such modifications, if you also do each of
the following:

   a) Give prominent notice with each copy of the Combined Work that
   the Library is used in it and that the Library and its use are
   covered by this License.

   b) Accompany the Combined Work with a copy of the GNU GPL and this license
   document.

   c) For a Combined Work that displays copyright notices during
   execution, include the copyright notice for the Library among
   these notices, as well as a reference directing the user to the
   copies of the GNU GPL and this license document.

   d) Do one of the following:

       0) Convey the Minimal Corresponding Source under the terms of this
       License, and the Corresponding Application Code in a form
       suitable for, and under terms that permit, the user to
       recombine or relink the Application with a modified version of
       the Linked Version to produce a modified Combined Work, in the
       manner specified by section 6 of the GNU GPL for conveying
       Corresponding Source.

       1) Use a suitable shared library mechanism for linking with the
       Library.  A suitable mechanism is one that (a) uses at run time
       a copy of the Library already present on the user's computer
       system, and (b) will operate properly with a modified version
       of the Library that is interface-compatible with the Linked
       Version.

   e) Provide Installation Information, but only if you would otherwise
   be required to provide such information under section 6 of the
   GNU GPL, and only to the extent that such information is
   necessary to install and execute a modified version of the
   Combined Work produced by recombining or relinking the
   Application with a modified version of the Linked Version. (If
   you use option 4d0, the Installation Information must accompany
   the Minimal Corresponding Source and Corresponding Application
   Code. If you use option 4d1, you must provide the Installation
   Information in the manner specified by section 6 of the GNU GPL
   for conveying Corresponding Source.)

  5. Combined Libraries.

  You may place library facilities that are a work based on the
Library side by side in a single library together with other library
facilities that are not Applications and are not covered by this
License, and convey such a combined library under terms of your
choice, if you do both of the following:

   a) Accompany the combined library with a copy of the same work based
   on the Library, uncombined with any other library facilities,
   conveyed under the terms of this License.

   b) Give prominent notice with the combined library that part of it
   is a work based on the Library, and explaining where to find the
   accompanying uncombined form of the same work.

  6. Revised Versions of the GNU Lesser General Public License.

  The Free Software Foundation may publish revised and/or new versions
of the GNU Lesser General Public License from time to time. Such new
versions will be similar in spirit to the present version, but may
differ in detail to address new problems or concerns.

  Each version is given a distinguishing version number. If the
Library as you received it specifies that a certain numbered version
of the GNU Lesser General Public License "or any later version"
applies to it, you have the option of following the terms and
conditions either of that published version or of any later version
published by the Free Software Foundation. If the Library as you
received it does not specify a version number of the GNU Lesser
General Public License, you may choose any version of the GNU Lesser
General Public License ever published by the Free Software Foundation.

  If the Library as you received it specifies that a proxy can decide
whether future versions of the GNU Lesser General Public License shall
apply, that proxy's public statement of acceptance of any version is
permanent authorization for you to choose that version for the
Library.