We currently have and 3 node RAC using NFS as storage. The database works fine using the Oracle Direct NFS Client, the problem appears when we try to make an RMAN Backup of the database to the NFS share.
Using lsof we can see that RMAN is using the kNFS (Kernel) client and it works very slow. Writing small RMAN pieces (2 GB) take about 20 minutes.
Anyone knows if is possible to force RMAN to use Oracle Direct NFS client or there's any way to improve the performance of RMAN and NFS?
Thanks.