Sounds logical, Thanks

------ Original Message ------ Subject: Re: [Qgis-user] Backing up GIS Data Date: Sat, 16 Jul 2016 08:54:56 +0200 To: Micha Silver, Qgis-user From: Bo Victor Thomsen

I haven't any extensive experience with moving databases from windows to linux or vice versa, but I've been moving (backup/restore) databases between windows hundred of times.

  • I'm normally using the "Custom/binary" format, because it's the fastest method to do the backup/restore cycle.
  • When I'm creating/ structuring a new spatial database, I always leave the "public" schema alone and put data in another schema created for that purpose.
  • When doing a backup for the purpose of moving a database, I only backup the aforementioned *data* schema, *not* the "public" schema, thus avoiding taking backup of hundreds of PostGIS functions residing in schema "public". This makes it easier to move spatial data from one PostGIS-enabled database to another without annoying errors.
  • And - just as you - I use the "plain" format when it's necessary to make some changes to the structure or fields  with a text editor during the move of the database.
Regards

Bo Victor Thomsen
AestasGIS
Denmark

Den 15/07/16 kl. 15:23 skrev Micha Silver:
Hi 


------ Original Message ------ Subject: Re: [Qgis-user] Backing up GIS Data Date: Fri, 15 Jul 2016 07:04:20 +0200 To: Qgis-user From: Bo Victor Thomsen

As an old GIS database dog -

  • It's a wise and smart decision to use Postgres/PostGis for storing and using spatial data.
  • As for backup: Do *exactly* as Jeff writes :-). "Point in time" backups are nice, but not the best backup solution for Postgres databases. Jeff's solution is.

Regards

Bo Victor Thomsen
AestasGIS
Denmark
 





Den 14/07/16 kl. 21:26 skrev Jeff McKenna:
Hi Tyler,

This is a good question, and an important one, and don't feel bad about posting it here - likely we can all learn from this discussion, as it definitely involves the whole QGIS community.

I have quite a lot of experience backing up databases, especially PostgreSQL/PostGIS databases.  I can tell you that it is for sure important to run "pg_dump" as a daily backup (in addition to your whole server image/backup) - that pg_dump has saved me and my clients hundreds of times, and it is very portable and easy to access (as opposed to your whole image/machine backup).  One very important point (that's I've learned from experience) when using pg_dump is to *always* use the custom binary/compressed output format (the "--format=c" commandline switch for pg_dump).  I've had

I have always used the default "plain" format for pg_dump backups. When time comes to migrate data to a new installation, it allows me to edit the SQL backup file: restore only some of the tables, change owners, schema names, even change the database name. This is just a minor convenience. Am I making a mistake? Should I move to the binary format to insure reliability?  

Thanks
terrible times with the other output format types, especially when restoring a database from a Windows server to a Linux server etc (with hardcoded paths inside the backup).  I live by that format, swear by it, from experience, moving so many client databases from one machine to another.

Another mailing list to keep in mind is the PostGIS mailing list, where these backup topics also pop up from time to time - and discussions are more geo-related, so are very helpful, than just the generic PostgreSQL mailing list.

So, definitely implement an additional backup process using pg_dump (you can experiment restoring it through the "pg_restore" command), you won't regret the effort spent.

Happy QGIS-ing,

-jeff





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Micha Silver
Arava Drainage Authority
+972-523-665918

Micha Silver
Arava Drainage Authority
+972-523-665918

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