hello, I'm Maayan, I'm in a DBA team that uses postgresql. I saw in the documentation on wals: https://www.postgresql.org/docs/10/wal-intro.html In the tip box that, it's better not to use a journaling filesystem. and I wanted to ask how it works? can't we get corruption that we can't recover from? I mean what if postgres in the middle of a write to a wal and there is a crash, and it didn't finish. I'm assuming it will detect it when we will start postgres and write that it was rolled back, am I right? and how does it work in the data level? if some of the 8k block is written but not all of it, and then there is a crash, how postgres deals with it?
Thanks in advance
