[QA] new config.php setting with files_primary_s3

[jnweiger]

WHAT Needs to be Documented?

'concurrency' is new in:

'objectstore' => [
        'class' => getenv('OWNCLOUD_OBJECTSTORE_CLASS'),
        'arguments' => [
          'bucket' => getenv('OWNCLOUD_OBJECTSTORE_BUCKET'),
          'autocreate' => getenv('OWNCLOUD_OBJECTSTORE_AUTOCREATE'),
          'part_size' => 52428800,
          'concurrency' => 4,   // <---------------

WHERE Does This Need To Be Documented (Link)?

config sample and whereever files primary s3 is discussed.

WHY Should This Change Be Made?

New in release 1.4.0
owncloud/files_primary_s3#605

(Optional) What Type Of Content Change Is This?

• New Content Addition
• Old Content Deprecation
• Existing Content Simplification
• Bug Fix to Existing Content

(Optional) Which Manual Does This Relate To?

• Admin Manual
• Developer Manual
• User Manual
• Android
• iOS
• Branded Clients
• Desktop Client
• Other

[jnweiger]

@mmattel @EParzefall release of 1.4.0 is done. Ping?

[mmattel]

Location for documentation at: https://doc.owncloud.com/server/10.11/admin_manual/configuration/files/external_storage/s3_compatible_object_storage_as_primary.html

No generic config sample content present

To be decided where part_size and concurrency can be applied to the various vendor samples.

[jnweiger]

Studying the code, I am pretty certain, that both part_size and concurrency are generic arguments, that can be used with any backend.
The way the arguments are constructed I believe that unknown arguments are harmless in any case.

But, I am afraid the the implemenation is not even correct -> opening owncloud/files_primary_s3#624

[jnweiger]

According to https://docs.aws.amazon.com/sdk-for-php/v3/developer-guide/s3-multipart-upload.html

concurrency defaults to 5 ,
part_size defaults to 5242880 .