I've been doing a lot of research into scaling issues on Amazon EC2, especially growing databases. I looked into how I can make the database more solid and sound (I use PostgreSQL). Many sources say using RAID0 with streaming replication and WAL archiving is pretty fault tolerant.
All the postresql data & tables will be stored on the EBS volumes that have RAID0. Many sources claimed that using an XFS system would be ideal. Is it possible to add more EBS volumes to this RAID0 array if I ran out of space while keeping the database online? If so, is there some sort of recipe or source I can follow?