[Fiware-fiadopt-coaching] Some feedback on the Object Storage GE

[Giovanni Toffoli - LINK]

Dear Sandor,

during the past months we had performed simple tests on the Object 
Storage by creating containers and uploading objects from the web 
interface of the FI-Lab portal.
In order to test some application functions using the Object Storage 
API, we started with the execution of the sample code in the Object 
Storage wiki 
(https://forge.fiware.org/plugins/mediawiki/wiki/fiware/index.php/Object_Storage_-_User_and_Programmers_Guide#Programmer_Guide_-_Accessing_Object_Storage_via_the_native_API).
But we met a few problems, due to our lack of experience and possibly to 
uncomplete documentation.

1. Some swift endpoints listed as available don't respond

We repeatedly executed the sample code without success. Then, since it 
seems that there are some 10 swift endpoints in the list, while the 
sample code in the wiki always picks always the same endpoint 
(http://api3.ficore.imaginlab.fr:8080/v1 in our case), we iterated on 
the list until we found one service provider working 
(http://api2.xifi.imaginlab.fr:8080/v1).

2. Cannot find complete documentation on the OS service provided by the 
FI-Lab

By executing the modified sample code, eventually we are able to create 
a test container and to put a test object inside it.
At the start we were confused: not finding specific information on the 
endpoints of the swift service, we tried to use the first one that 
allowed us to execute the test procedure (modified sample code) with 
success.
We thought that the different endpoints were working as a federation 
managing a shared namespace. Only by trying we became aware that we 
should pick from the list the Budapest2 endpoint in order to get a 
synchronized view of our containers from both the Fi-lab dashboard and 
the API interface.
By the way: we noticed that, adding an object to a container through the 
REST API, the count of objects in the web view is refreshed with 
considerable delay, possibly due to some caching.

Could you tell us where we could find some more documentation, besides 
the general one concerning the Object Storage specifications and the 
Object Storage API?
Thank you in advance.

Best regards, Giovanni

-- 
Giovanni Toffoli, CEO
LINK srl - Via Udine 30, 00161 Roma
+39 06 44231115, +39 340 0727780