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StorNext File System Tuning
Distributed LAN Client Vs. Legacy Network Attached Storage
StorNext File System Tuning Guide 24
Distributed LAN Client Vs. Legacy Network Attached
Storage
0
StorNext provides support for legacy Network Attached Storage (NAS)
protocols, including Network File System (NFS) and Common Internet
File System (CIFS).
However, using Distributed LAN Client (DLC) for NAS connectivity
provides several compelling advantages in the following areas:
•Performance
• Fault Tolerance
• Load Balancing
• Client Scalability
• Robustness and Stability
• Security Model Consistency
Performance 0 DLC outperforms NFS and CIFS for single-stream I/O and provides
higher aggregate bandwidth. For inferior NFS client implementations,
the difference can be more than a factor of two. DLC also makes
extremely efficient use of multiple NICs (even for single streams,)
whereas legacy NAS protocols allow only a single NIC to be used. In
addition, DLC clients communicate directly with StorNext metadata
controllers instead of going through an intermediate server, thereby
lowering IOP latency.
Fault tolerance 0 DLC handles faults transparently, where possible. If an I/O is in progress
and a NIC fails, the I/O is retried on another NIC (if one is available). If a
Distributed LAN Server fails while an I/O is in flight, the I/O is retried
on another server (if one is running). When faults occur, applications
performing I/O will experience a delay but not an error, and no
administrative intervention is required to continue operation. These fault
tolerance features are automatic and require no configuration.