Hi Inge, 
There is an implementation for using the AWS S3 object store as the data store for a given Galaxy instance. The implementation is located here https://bitbucket.org/galaxy/galaxy-central/src/3a51eaf209f2502bf32dbb421ecabb7fe46243ea/lib/galaxy/objectstore/s3.py?at=default and it offers several config options in universe_wsgi.ini.

The data stored in S3 is locally cached while it's being operated on but always synced with the back end object store. 

Pulsar seems to have some support for S3 but, as the docs say in the implementation, it's explicitly beta: https://github.com/galaxyproject/pulsar/blob/b32b7caafc6582a3a28e694e2dbb75e7a8f2bffc/galaxy/objectstore/pulsar.py

As a side note, there are some planned enhancements to how the object store implementation is handled and there will hopefully be quite a bit of activity on this topic in the near future (eg, https://trello.com/c/YynQKq8m).

Hope this at least clarifies the state of object store support,
Enis


On Mon, Aug 25, 2014 at 10:24 AM, Raknes Inge Alexander <inge.a.raknes@uit.no> wrote:

​I have a few questions about object stores in Galaxy:

1: Can all Galaxy data sets be stored in an object store?
2: If so,  does Galaxy still need to maintain a local copy of the data?
3: Is LWR or Pulsar able to get the data directly from the object store, or does it still have to go through Galaxy?

We are planning to let users of our Galaxy installation handle large input/output files (~30G) and we expect that the VM containing our Galaxy installation will become a bottleneck if all data needs to travel through that node.

- Inge Alexander Raknes

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