Is there node redundancy in Postgres-XL?

Question

PostgreSQL

Good day. I learned today about the existence of Postgres-XL.
I wanted to consider the possibility of using it as a distributed DBMS (of course).
So far, according to the results of my study, I could not understand whether there is a reservation of nodes in this system, i.e. ensuring the reliability of data storage .
Plus, I would also like to understand the attitude of PostgreSQL itself to this development. The news hangs on the site, but it seems that the offices are different, it's not clear ....
I choose a box for distributed PostgreSQL, I think it's more promising.