----- "Chris Joelly" <chris-m-lists@xxxxxxxxxx> wrote: | Hello, | | i have a question on locking issues on GFS: | | how do GFS lock files on the filesystem. I have found one posting to | this list which states that locking occurs "more or less" on file | level. Is this true? or does some kind of locking occur on directory | level too? | | The question arrose because i was thinking on whats would happen when | using GFS on an file server with home directories for lets say 1000 | users. how do i setup this directory structure to avoid locking | issues | as best as possible. | | is a directory layout like the following ok when /home is a GFS file | system: | | /home/a/b/c/abc | /home/d/e/f/def | /home/g/h/i/ghi | .. | /home/x/y/z/xyz | | thanks Chris Hi Chris, I'm not sure what your concern is. There shouldn't be any issues with GFS locking, for the most part. GFS has cluster-wide locking so that locking a file on one node in the cluster will known automatically by the entire cluster. GFS uses an internal lock caching mechanism known as "glocks". These glocks are cached locally and don't require lots of network interaction unless there are multiple nodes requesting the same lock. With home directories, I wouldn't expect a lot of lock contention anyway, so again, I'm not sure what your concern is. Regards, Bob Peterson Red Hat Clustering & GFS -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
