Commit 443a33e7 authored by Uwe Jandt (DESY, HIFIS)'s avatar Uwe Jandt (DESY, HIFIS)
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some further explanations and corrections

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# Data Transfer for Helmholtz
# Large Data Transfer for Helmholtz
The HIFIS Transfer Service (HTS) enables the Helmholtz centres to easily share large data set in collaborations.
#### How is this implemented?
To achieve this, [WebFTS](https://webfts.fedcloud-tf.fedcloud.eu/) is used as graphical frontend.
It enables the user to commission data transfers with CERN's backend service FTS3,
which in turn controls transfers between an active and a passive endpoint at the involved centres.
The main advantage of using FTS3 compared to commonly used FTP or SCP based transfers is that no active involvement by the user is needed after commissioning the transfer.
It enables the user to commission data transfers with CERN's backend service FTS3.
FTS3 controls transfers between an active and a passive endpoint at the involved centres.
The main advantage of using FTS3 compared to commonly used FTP or SCP based transfers is that no active involvement by the user is needed after commissioning the transfer. Hence, users can schedule the transfer, e.g. overnight, and have the data ready for use later.
#### Preconditions
#### What are the preconditions to use HTS?
In order to use HTS, a centre needs to install a dedicated endpoint that is capable of communicating with FTS3 either actively or passively.
In order to use HTS, a centre needs to:
* be connected to Helmholtz AAI (see [list](https://hifis.net/doc/backbone-aai/list-of-connected-centers/)),
* install a dedicated endpoint that is capable of communicating with FTS3 either actively or passively, and
* of course, provide sufficiently large, performant and available storage to which the endpoint has access to.
At the time of writing, HIFIS offers a passive endpoint solution in form of an Apache webserver for installation at a centre.
Configuration and installation instructions can be [found in the Technical Documentation](https://hifis.net/doc/core-services/fts-endpoint/).
An active endpoint that can be used as a relay point between two passive endpoints is also available.
An active endpoint that can be used as a relay point between two passive endpoints is also available at DESY.
#### Support
For questions and/or support, please don't hesitate to write us.
If you want to set up data transfer for your needs, or in case of any questions and queries, please don't hesitate to write us.
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