Dell PowerVault DR2000v - Manual (Page 132)

Best Practices: Rapid NFS
This topic introduces some recommended best practices for using Rapid NFS operations with the DR Series system.
Containers must
be of type NFS/
CIFS RDA containers cannot use Rapid NFS. If you have existing NFS/CIFS containers, you do not
need to create new containers to use Rapid NFS; you can install the plug-in (driver) to existing
clients.
The Rapid NFS
plug-in (driver)
must be installed
on client systems After the plug-in is installed, write operations will go through Rapid NFS while metadata
operations such as file creates and permission changes will go through the standard NFS
protocol. Rapid NFS can be disabled by uninstalling the plug-in.
Markers must be
set on the client,
not in the DR
Series GUI If you are using a DMA that supports a marker, should explicitly set it. Your containers should
have the marker type of None until you set the marker using the Mount command on the client
(after installing the Rapid NFS plug-in). For existing containers, re-set the marker using the
procedure that follows.
For example, if you wanted to set the CommVault marker (cv):
mount -t rdnfs 10.222.322.190:/containers/backup /mnt/backup -o
marker=cv
Mount command usage:
rdnfs [nfs mount point] [roach mount point] -o marker=[marker]
where:
nfs mount point = Already mounted nfs mountpoint
roach mount point = A new mount point
marker = appassure, arcserve, auto, cv, dump, hdm, hpdp, nw, or
tsm
Your DR Series
system must
meet the
minimum
configuration Rapid NFS is only available with a DR6000 system and a client with a minimum of 4 CPU cores
running at a minimum of 4 GHz cumulative processing power and 2 GB memory. Kernels must
be 2.6.14 or later. For a list of supported operating systems, see the
Dell DR Series System
Interoperability Guide .
If you update your operating system, you must update your Rapid NFS plug-in as well. Updates
are available on the Support site as well as within the GUI on the Clients page.
Rapid NFS is
stateful If the DR Series system goes down, the connection will terminate. DMAs will restart from the
last checkpoint.
Rapid NFS and
passthrough
mode If Rapid NFS mode fails for any reason, the DR Series system falls back to regular NFS mode
automatically. For details, see
Monitoring Performance .
Rapid NFS
performance
considerations When using Rapid NFS on your client, Dell recommends that you do not run other protocols to
the DR in parallel, as this will adversely affect your overall performance.
Rapid NFS
acceleration
constraints Rapid NFS does not support:
• Direct I/O memory
• Mapped files
• File path size greater than 4096 characters
132