Difference between revisions of "Backup and Restore"

Revision as of 11:23, 30 November 2012

Backing Up And Restoring Data

The most important aspect of maintaining a properly functioning IMSMANG system is backing up and restoring data. Regular data backups are essential for maintaining the integrity of the system in case of sytem failure, software errors or accidental data deletion. Not only should information managers mandate that all IMSMA^NG data is regularly backed up, but more importantly a multitired backup strategy should be used to eliminate data loss. Consider the following options below when developing a backup strategy for IMSMA^NG.

• disk mirroring
• operating system backups
• hard disk backup
• offsite data storage
• IMSMANG-specific backups

Moreover, a backup is only as good as the ability to restore it. As such, any data backup strategy should include plans to test existing backups to ensure that the backups are usable. If it becomes necessary to restore data, regular testing of backups helps ensure that it will be possible to do so.

Backup Recommendations The table below outlines the recommended schedule for backing up the IMSMANG database and other files. Note that an event-based change to the components necessitates a backup. Event-based changes include events such as: Before upgrading software Before importing data After importing field reports After making SQL changes to the database Server Client Server and Client Component Daily Weekly Weekly Event-based change IMSMANG database ● ● ● Attachments ● ● ● GIS database ● ● ● Maps ● ● ● Templates ● ● ● Translation ● ●

Backing Up the IMSMA^NG Database

IMSMANG contains several stores of information that can be backed up. By far, the most critical store is the IMSMANG database itself because it contains all of the active data in IMSMANG including published reports, form templates and geographic data in addition to the typical mine action information. IMSMANG’s Backup capability backs up the IMSMANG database by executing a MySQL database dump command that creates a complete backup of all of the data in the database including any additional tables, views and other customisations. The resulting dump.sql file, which is stored in a time-stamped directory for easy identification, includes the necessary commands to recreate the database with all of the existing data.

The dump.sql file is stored in text format and can be made smaller for storage or transport using compression tools such as ZIP and RAR

Information managers can augment the IMSMANG Backup capability with other scheduled backups using MySQL Administration tools, for example, and build daily or weekly routines that back up the database automatically. These backups work similarly to IMSMANG Backup; however, any backup made outside of IMSMANG will have to be restored manually. Even so, regularly scheduled backups are an excellent component of a backup strategy.

In a client-server environment, backups should be made from the server rather than the clients. Similarly, backups can only be restored on the IMSMANG server

Attachments

IMSMANG stores attachments on the server file system separate from the IMSMANG database. Because of the size of some attachments, it may not be beneficial or necessary to back up the attachments each time. IMSMANG Backup provides the option to exclude attachments when performing a backup.

For regular, complete backups, it is recommended to include attachments. But, if the size of a backup file is a concern, the attachments can be manually deleted. This is a better alternative to creating a backup without attachments since attachments cannot be added back to the backup file. Excluding attachments from a backup is an option that should be used with caution.

Backing Up Other IMSMA^NG Information

In addition to the IMSMANG database and attachments stored on the server, IMSMANG Backup allows users to back up certain settings from the IMSMANG client. These include:

• GIS database (.mdb file)
• map files (.mxd, etc)
• field report template files
• iReport template files
• translation .properties files

GIS Dataabase

While IMSMANG stores all coordinate data in the MySQL database that is backed up with the IMSMANG database, IMSMANG also stores coordinate data in a geodatabase file (IMSMA.mdb) on each client computer to allow data to be displayed on the map. This file should be included with each IMSMANG backup to shorten the time it takes to launch IMSMANG after a restore. IMSMANG automatically builds this file during system launch if the file is missing, but it can take several hours to do so.

Because the geodatabase is built on a per-client basis, it is also recommended to launch the client to fully update the geodatabase prior to backing it up. After it is backed up, the geodatabase can be transferred manually to other freshly installed clients to shorten the time required to build the geodatabase during system launch.

Maps

IMSMA^NG map files can be loaded on a per-client basis and stored in IMSMA^NG Backup, providing an easy way to share maps between clients.

IMSMANG Backup backs up only the active map on each client. Other maps previously loaded on a client will need to be copied manually

Field Report Templates and iReport Templates

IMSMANG provides the capability to store copies or drafts of field report templates and iReport templates to the file system during report design. While the published versions of the templates are backed up as part of the IMSMANG database backup, the files are only included if the option is selected on the IMSMANG Backup window. Storing these files in the backup is recommended as it makes it easier to resume drafting templates and reports.

Translations

IMSMANG stores translations of the application in several places. Translations and localisations of data elements are stored in the IMSMANG database and are backed up with the database backup. The .properties files used to translate the IMSMANG interface are stored externally to the database, but they can be added to the IMSMANG Backup as an option. If changes are made to the .properties files, it is recommended to back them up after each change as well as each time a full backup is made.

Other Backup Considerations

While IMSMANG Backup backs up all of the files used in the typical operation of IMSMANG, there are other customisable files that should also be backed up. These include:

• map customisations
• base maps
• external reporting tools

Map Customisations

IMSMANG does not automatically back up customisations made to maps used in IMSMANG. Users can make changes to the imsma.mxd file, create or modify ESRI style files, add symbology or make many other changes to maps, but these files are not included in the IMSMANG Backup and must be separately backed up and managed.

Base Maps

It is recommended that information managers make backups of maps that are imported into IMSMANG for use on client computers. While IMSMANG Backup backs up the maps when they have been imported, these base map files are not managed within IMSMANG and should be backed up manually to allow for customisation and later import.

External Reporting Tools

External reporting tools and other add-ons are not backed up by IMSMANG and should be backed up manually. These include any tools using ODBC connections to IMSMANG such as Microsoft Access databases, Microsoft Excel spreadsheets, OpenOffice connections and Crystal Reports. Information managers should ensure that these tools get backed up manually or automatically.