Hi,

thank you for these insights and suggestions.

@greg: it is a ethernet wired network-drive.

The problem probably occurs due to hourly backup tasks. These are reading the GPKGs also during edit sessions. And that triggers the errors.

All the best
Simon

Am 13.08.2024 09:41, schrieb Francesco Pelullo:

Hi Simon,

We're usually store data in .gpkg on network drive.

Data access in read mode is very nice, also with dozen concurrent users.

Instead, writing data in .gpkg on network drive can cause errors, specially if from two or more concurrent users.

This is because of limits of SQLite format. In past, there was suggestions about a "semaphore" file that prevents to edit .gpkg file, if another user is editing.

My suggestion is: split .gpkg in smallest parts, assign every area (or part) to a user, merge parts at the end.

Or, use PostGIS.

Regards

Francesco

Il mar 13 ago 2024, 09:30 Simon Gröchenig via QGIS-User <qgis-user@lists.osgeo.org> ha scritto:

Hi list,

a project partner "sometimes" struggles to edit GPKGs that are saved on a network drive. Trying to modify the GPKG in QGIS results in the following error:

Provider errors: OGR error committing transaction: sqlite3_exec(COMMIT) failed: disk I/O error

No problems occur modifying the same GPKG when it is located on a local drive.

I found the following 8-year-old qgis-user thread: https://qgis-user.osgeo.narkive.com/bjrGqIjn/something-to-think-about-geopackage-and-wal

Is this thread related to the disk I/O error?

I would also like to ask if GPKGs or SQLite-DBs are still unsave to use from network drives!? Is there any current information about this somewhere?

Best regards
Simon

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