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Storage devices are not 100% failsafe, and one should maintain multiple archives on separate devices. It may also be prudent to maintain intermediate versions of a base, allowing fallback to an earlier version in case of severe modification problems. Lastly, the .gw save format is a clean and sure mechanism to exchange bases between GeneWeb users (GEDCOM is also available but not with 100% compatibility).
A simple mechanism to archive a base is to make a copy of the
base.gwb folder. A better mechanism is to produce a textual
base.gw file using the .gw format.
To create an archive for base
toto, use the gwu command and archive the resulting output:
gwu toto > toto.gw
Or using option -o for gwu :
gwu toto -o toto.gw
You may select any name of your choice, provided you keep the extension
.gw. For safe archival, make multiple copies of the base.gw file, on multiple devices.
Using the .gw file format has many advantages :
- simplicity : a single file when the base folder contains multiple files (note forum and update history are not preserved through a .gw file) ;
- economy : a .gw source file is quite a bit smaller than the corresponding base folder ;
- compatibility : the .gw format maintains compatibility with future versions of GeneWeb ;
- accessibility : the .gw is a human readable format, and allows for global editing or difference detection
- (using a command such as
diff base-v1.gw base-v2.gwunder Unix/Linux/OSX)
To restore a base
toto.gw, use the gwc command:
gwc toto.gw -o toto
Partial extraction of data from a base
gwu commands allow the partial extraction of data from a base.
-a: extract the ancestors of the designated person.
-d: extract the descendants of the designated person, as well as their spouses and the parents of their spouses (except, for the latter point, if the option
-nsphas been activated).
-ad: extract ancestors of the designated person and their descendants, including spouses, but without spouses' parents. Note that in this case, the descendants of the designated person are included in the extract.
-s: extract persons bearing a particular surname, including their spouses and the parents of their spouses (except, for the latter point, if the option
-nsphas been activated).
Linked pages associated with extracted persons should be part of the extracted data (to be verified).
Archiving a V7 base
In the .gw file created by gwu some orphan information is not saved:
- Isolated persons, that is, which have no family and are not part of any family nor related to anyone (witness, god parent…).
- Such a person may appear for instance as a witness at some event which is subsequently deleted.
- GeneWeb V7 offers an additional parameter
-isolatedthat also archives isolated persons.
- A Linked page (created with the WikiText syntax, or with the command
m=NOTES;f=linked_page) will not be saved if it is not referenced in the notes section of a person, or in another linked page.
- Should gwu stop with
Uncaught exception: Invalid_argument("index out of bounds"), add the
-memparameter (seen with 5.02 on Ubuntu)