HP ProLiant DL380G5-WSS 3.7.0 HP StorageWorks HP Scalable NAS File Serving Sof - Page 28
Cluster-wide administration. The Management Console a Java-based graphical
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• Cluster-wide administration. The Management Console (a Java-based graphical user interface) and the corresponding command-line interface enable you to configure and manage the entire cluster either remotely or from any server in the cluster. • Failover support for network applications. HP Scalable NAS uses virtual hosts to provide highly available client access to mission-critical data for Web, e-mail, file transfer, and other TCP/IP-based applications. If a problem occurs with a network application, with the network interface used by the virtual host, or with the underlying server, HP Scalable NAS automatically switches network traffic to another server to provide continued service. • Administrative event notification. When certain events occur in the cluster, HP Scalable NAS can send information about the events to the system administrator via e-mail, a pager, the Management Console, or another user-defined process. FS Option provides the following features: • Scalable NFS client connectivity. Over multiple NFS servers sharing the same filesystems, FS Option supports a linearly increasing client connection load as similarly configured servers are added to the cluster. A 16-node cluster, serving the same filesystems via NFS, can support 16 times more NFS clients (with similar workloads and the same performance) than a single server. • Scalable NFS performance. With multiple NFS servers serving the same filesystems and with appropriate client balancing among the servers, FS Option supports linearly increasing NFS performance. A 16-node NFS file-serving cluster provides nearly 16 times the performance results over a single NFS server for the same filesystems, up to the limit of the shared storage bandwidth. • High availability for NFS clients. FS Option supports continuous NFS client operation across a hardware or software failure that inhibits NFS service from a given cluster server. Because another cluster server inherits the same IP address used for the NFS client-server connections, the clients will continue NFS operation to that same IP address via a different physical server. The server inheriting the IP address and associated NFS clients may also be an NFS server serving a preexisting set of NFS clients. These pre-existing clients will not experience any interruption or delay when the new NFS clients transition to the server. (Only the transitioning subset of NFS clients, and not the pre-existing clients, are subject to the lock-recovery grace period and other transitional delays.) The transitioning subset of clients are shielded from transient errors that may be caused by the failure that induced the transition. • Cluster-wide NFS client lock coherency. FS Option supports mutual exclusion with file and byte-range locks used by multiple NFS clients connected to separate NFS servers exporting the same filesystem(s). Note, however, that file locks via NFS are disabled by default. Explicit administrative action is required to enable file locking via NFS. See Using the NLM protocol, page 195 for more information. 28 Introduction