Direct NFS Client – Performance, Scalability, and High Availability

Direct NFS Client – Performance, Scalability, and High Availability

Direct NFS Client includes two fundamental I/O optimizations to increase throughput and overall performance. First, Direct NFS Client is capable of performing concurrent direct I/O, which bypasses any operating system level caches and eliminates any operating system write-ordering locks. This decreases memory consumption by eliminating scenarios where Oracle data is cached both in the SGA and in the operating system cache and eliminates the kernel mode CPU cost of copying data from the operating system cache into the SGA. Second, Direct NFS Client performs asynchronous I/O, which allows processing to continue while the I/O request is submitted and processed. Direct NFS Client, therefore, leverages the tight integration with the Oracle Database software to provide unparalleled performance when compared to the operating system kernel NFS clients. Not only does Direct NFS Client outperform traditional NFS, it does so while consuming fewer system resources. The results of a detailed performance analysis are discussed later in this paper.

Oracle Direct NFS Client currently supports up to 4 parallel network paths to provide scalability and high availability. Direct NFS Client delivers optimized performance by automatically load balancing requests across all specified paths. If one network path fails, then Direct NFS Client will reissue commands over any remaining paths – ensuring fault tolerance and high availability.

Regards

Manoj