[Ocfs2-users] ocfs2 hangs during webserver usage

[Sunil Mushran]

Luis Freitas wrote:
>    The extent size would play a role on this also, as Sunil pointed. You could check if the extent size is different on your test environment. The mkfs tool might have defaulted a larger extent size if the total size of the filesystem is larger. (Sunil, correct me on this if I am wrong).

The extend size I was referring to is not related to any ondisk size.
It depends on the location the write() is issued to. Say you have a
100K sized file and you issue a write() at offset 1G. If the fs supports
sparse files, it will allocate (and init) blocks only around the 1G 
location,
leaving a hole in between. A non-sparsefile supporting fs, on the other 
hand,
will need to allocate (and init) the entire space between 100K and 1G.