Tell me the application (service) for storing attachments?

Question

Java

Good afternoon!

Tell me a server for storing attachments for some abstract entity (tasks, letters)

What would you like:

- accounting for duplication
- to return all attachments by entity id
- opensource
- easily scaled
- the presence of a java client

Answer 1

For example Redis - nosql, C, open/free, scalable, clients for many popular languages ​​(including java), simple interaction protocol (reminiscent of memcache). I'm not sure, but there is no check for duplicates in it. I see the structure like this: {id:{md5:attach1}:{md5:attach2}:{md5:attachN}}

Answer 2

Thanks, but I seem to have found what I need openstack.org/projects/storage/
I'm also looking at Hadoop.