• Andy Adamson's avatar
    NFSv4.1: turn off pNFS on ds connection failure · 568e8c49
    Andy Adamson authored
    If a data server is unavailable, go through MDS.
    
    Mark the deviceid containing the data server as a negative cache entry.
    Do not try to connect to any data server on a deviceid marked as a negative
    cache entry. Mark any layout that tries to use the marked deviceid as failed.
    
    Inodes with a layout marked as fails will not use the layout for I/O, and will
    not perform any more layoutgets.
    Inodes without a layout will still do layoutget, but the layout will get
    marked immediately.
    Signed-off-by: default avatarAndy Adamson <andros@netapp.com>
    Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
    568e8c49
nfs4filelayout.h 3.52 KB