Re: [SLUG] Network Real-Time Hot Filesystem Replication?

[Jamie Wilkinson <jaq@xxxxxxxxxxxxxx>]

This one time, at band camp, Amos Shapira wrote:
>1. You CAN'T mount a non-cluster-aware file system even read-only on the
>secondary node since the primary will change FS-structs under the feet of
>the read-only node and cause it to crash (because non-cluster-aware
>filesystems assume that they are the only ones who touch that partition).
>2. You CAN mount read-write on multiple nodes if you use one of the
>cluster-aware filesystems (GFS and OCFS are regularly mentioned, but if you
>find any other cluster-aware file system then it sounds like it will work
>too).

You're right, the example I was thinking of does not mount the filesystem on
the secondary nodes until the primary goes down; once the FS is not mounted
one of the secondaries takes over and mounts it read/write.