11/8/2023 0 Comments Klv apple xsanthe Domain Name System (DNS), the Routing Information Protocol (RIP), the Dynamic Host Configuration Protocol (DHCP), the Simple Network Management Protocol (SNMP). UDP (User Datagram Protocol) is a minimal message-oriented Transport Layer protocol (protocol is documented in IETF RFC 768).Īpplication examples that often use UDP: voice over IP (VoIP), streaming media and real-time multiplayer games. UDP on port 311 thinks that error checking and correction is not necessary or performed in the application, avoiding the overhead of such processing at the network interface level. UDP on port 311 provides an unreliable service and datagrams may arrive duplicated, out of order, or missing without notice. UDP port 311 would not have guaranteed communication as TCP. Guaranteed communication over TCP port 311 is the main difference between TCP and UDP. Only when a connection is set up user's data can be sent bi-directionally over the connection.Īttention! TCP guarantees delivery of data packets on port 311 in the same order in which they were sent. TCP is a connection-oriented protocol, it requires handshaking to set up end-to-end communications. TCP is one of the main protocols in TCP/IP networks. StorNext-based FC SAN systems may provide the ability to achieve high levels of performance, and to scale the system to large storage configurations.TCP port 311 uses the Transmission Control Protocol. If you are happy with the capabilities of Xsan, including scalability, manageability, reliability, and consistency of performance, then moving to another StorNext-based FC SAN is a reasonable approach. The alternative to FC SAN is Ethernet-based storage. Ethernet is fast, simple, and cost-effective, and is a technology that is enjoying a “virtuous cycle” - because it is simple and cost effective, many companies widely deploy it, and wide deployment means networking technology companies can accelerate investments to make Ethernet even faster and more cost-effective. Because of this, many industry experts have a very favorable view of Ethernet as a foundation infrastructure technology, and many companies are making Ethernet their strategic infrastructure of choice for storage and other uses.Įthernet-based storage systems result in a simplified infrastructure: there is no complex SAN to deploy and manage, and the need to qualify and manage deployment of expensive FC SAN HBAs for each server is eliminated. There are several available alternatives for Ethernet-based shared storage systems. Network Attached Storage (NAS) systems are attached to an Ethernet network, and are accessed via standard protocols such as CIFS and NFS. NAS systems are popular because it is relatively simple to deploy and manage an environment of a few NAS systems. Manually re-distribute the workload across multiple NAS systems, which can become a significant management challenge as the environment grows The controller hardware defines the performance of the system once a controller is “maxed out,” the only ways to get more performance are: Traditional NAS systems typically consist of two controllers (or “NAS heads”) in a failover configuration, so that if one controller fails, the other takes control of the failed controller’s disks and continues operating. The new system is typically over-provisioned in order to meet longer term growth requirements.īuy a larger NAS system, which requires a disruptive “forklift upgrade,” and move your data to this new system. The fundamental limitation in scalability often makes traditional NAS systems a poor fit for demanding video workflows. To address the scalability limits of traditional NAS systems, vendors have developed clustered file systems which can effectively join many controllers together and present them as a single image. If additional performance or capacity is required, then additional controllers can simply be added to the configuration. The scalability of clustered NAS systems makes them a viable candidate for video workflows, and with the simplicity of managing a large environment that presents a single image, some vendors who provide such systems are increasingly focusing on Enterprise applications. Like their predecessors, clustered NAS systems are accessed via standard NFS and CIFS protocols. This approach maintains simplicity, though it limits performance as each NFS or CIFS access must go to a single IP address, i.e., through a single network interface. Any distributed processing must take place via a back-channel in the storage system itself. Omneon MediaGrid, a shared storage system by Harmonic, builds on the clustered approach.
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