Can I add, remove, or change the order of the I/O daemons on an existing PVFS file system?
No. If you need to add, remove, or swap I/O servers the the existing list (which can usually be found in the /pvfs-meta/.iodtab file), we recommend that you rebuild your file system. The safest thing to do is to copy all of your data to another location, delete all of the files on the existing PVFS file system, make your changes, restart PVFS, and then copy your data back onto the file system. All of the PVFS components rely on the ordering of I/O servers listed in the .iodtab file, and altering it will result in file corruption. We realize that this is really inconvenient, but we really don’t have a better solution at this time. Future releases will hopefully better address this issue.
