postgresql in cluster of servers

Hello to all list members:

I'm looking for information about using postgresql in a cluster of servers
where all real servers share a unique databases location outside them.

The question could be one of the follows?

?Is the prostgresql prepared to synchronize simultaneous accesses to oneself
database among processes that  run in different PC's?

or

?Was the postgresql database designed to allow simultaneous acceses of
processes that run in different PC's allowing for own design the
sincronizationof all the processes?


Thanks in advance for the attention
Enediel
Linux user 300141

Happy who can penetrate the secret causes of the things
¡Use Linux!