Network file virtualization.Virtualization An umbrella term for enhancing a computer's ability to do work. Following are the ways virtualization is used.
Partitioning the computer's memory into separate and isolated "virtual machines" simulates multiple machines within one physical computer. is key to managing today's demanding file storage requirements. One of the most promising--and challenging--developments is network file virtualization See storage virtualization. (NFV NFV Nelfinavir (HIV-1 specific protease inhibitor)
NFV Net Future Value
NFV North Fulton Voices (Georgia realtor group) ) that enables unstructured data Data that does not reside in fixed locations. Free-form text in a word processing document is a typical example. Contrast with structured data. See free-form database. management without disrupting end-user or application access. Done correctly, network file virtualization optimizes networked attached storage (NAS (1) See network access server.
(2) (Network Attached Storage) A specialized file server that connects to the network. A NAS device contains a slimmed-down operating system and a file system and processes only I/O requests by supporting the popular ), eases storage management overhead, simplifies end-user access, and enables additional storage management functionality.
Strategic approaches like ILM. Storage Grid and Utility Computing (1) Pay-per-usage processing provided by a service organization that uses its own computers and facilities. Customers access the computers via a private network or over the Internet and are charged according to how much computing time they use, such as CPU seconds, minutes or hours. require data to move freely across the environment without disrupting end-user or application access. Standards-based NFV offers this required non-disruptive data movement across heterogeneous environments, which represents a significant change in the ability to effectively manage NAS environments.
Government and industry regulations have placed new demands on the storage infrastructure right in the middle of flat IT headcount budgets and unprecedented storage growth. Strategic Research Corp. recently published a three-year forecast predicting a seven-times increase in storage capacity but no associated increase in IT personnel to manage the larger pool.
File virtualization technologies like NFV were developed to simplify and automate NAS and unstructured data management while enabling client and application data access.
According to according to
1. As stated or indicated by; on the authority of: according to historians.
2. In keeping with: according to instructions.
3. IDC, storage administrators must increase their efficiency by 60% just to stay even with the anticipated growth in storage capacity. NFV not only helps administrators meet the storage management challenges of today, NFV drives tremendous benefits.
NFV is based on a number of widely deployed and mature technologies integrated with some newly emerging technologies. Mature technologies include file servers, file systems including recent innovations for clustering, distributing and spanning the wide area networks; along with data protection utilities including snapshot and backup, and global names spaces including DFS (Distributed File System) An enhancement to Windows NT/2000 and 95/98 that allows files scattered across multiple servers to be treated as a single group. With Dfs, a network administrator can build a hierarchical file system that spans the organization's LANs and and Automount.
However, important functionality has traditionally been missing:
* Active data cannot change physical location due to disruption of user and application access
* Global namespace A Global Namespace is a heterogeneous, enterprise-wide abstraction of all file information, open to dynamic customization based on user-defined parameters. This becomes of particular importance as multiple network based file systems proliferate within an organization -- the challenge presentation and management is too complex
* While Automount is prevalent, it has limitations and is not part of the NFS (Network File System) The file sharing protocol in a Unix network. This de facto Unix standard, which is widely known as a "distributed file system," was developed by Sun. See file sharing protocol and WebNFS.
NFS - Network File System protocol standard
* Identifying and resolving capacity and performance management issues is too manual and labor intensive Labor Intensive
A process or industry that requires large amounts of human effort to produce goods.
A good example is the hospitality industry (hotels, restaurants, etc), they are considered to be very people-oriented.
See also: Capital Intensive, Trading Dollars
* Staging data between online and near line storage is not automated
* Consolidations are continually delayed so the impact on data availability Refers to the degree to which data can be instantly accessed. The term is mostly associated with service levels that are set up either by the internal IT organization or that may be guaranteed by a third party datacenter or storage provider. and user disruption are IT labor-intensive and error-prone
The emerging technologies enabling NFV include file management applications, transparent file protocol switching, standards-based global namespaces, and global namespace management.
File Management Applications
NFV enables file management applications that transparently manage active data. Purpose-built applications simplify management tasks and automate file management by identifying capacity and performance issues and then directly resolving those issues. File management applications go well beyond existing tools that provide monitoring capabilities and storage status information. File management applications, with NFV as an underlying foundation, allow administrators to optimize storage instead of simply checking status.
These essential, NFV-enabled network storage applications include:
* Capacity management. Automatically identifies over-allocations at the file server, volume and directory level; and takes corrective action A corrective action is a change implemented to address a weakness identified in a management system. Normally corrective actions are instigated in response to a customer complaint, abnormal levels if internal nonconformity, nonconformities identified during an internal audit or .
* Tiered storage management. Automatically stages data between high-speed and near-line storage; transparently supports service levels without disrupting access.
* Performance management. Automatically identifies performance bottlenecks at the file server, volume, and directory level; and optimizes I/O (Input/Output) The transfer of data between the CPU and a peripheral device. Every transfer is an output from one device and an input to another. See PC input/output.
I/O - Input/Output .
* Consolidation. Pools multiple file servers to appear as one. Can be permanent or temporary as part of consolidations.
* Disaster recovery. Synchronous and asynchronous Refers to events that are not synchronized, or coordinated, in time. The following are considered asynchronous operations. The interval between transmitting A and B is not the same as between B and C. The ability to initiate a transmission at either end. content distribution across multiple locations.
* Regulatory compliance. Automates regulatory compliance data retention, retrieval and authentication.
Transparent File Protocol Switching
The key to NFV is the ability to manage storage without any user or application service disruption. The batch window continues to shrink while the amount of storage to be managed continues to grow. Management operations must execute without impacting data availability.
Users and applications cannot cope with a file's physical location changing while actively reading and writing data. Transparent File Protocol Switching on the network is therefore required to manage active data.
The key to Transparent File Protocol Switching is the ability to provide location transparency for data actively being accessed without introducing data integrity, data access or performance risks. True switching technology removes the data integrity and access risk by routing traffic, rather than storing persistent data--even file system or global namespace related data.
To virtualize To cause a virtual technique to be performed. See virtualization. a large number of file servers, filtering is critical to switch only the required traffic and bypass processing all other traffic. Transparent file protocol switching requires the examination of only a small fraction of the network traffic. A proper filtering architecture allows file protocol switching to "front-end" literally billions of files and hundreds of thousands of IOPS IOPS Input/Output Per Second
IOPS Input/Output Operations Per Second (server performance measurement)
IOPS International Organization of Pension Supervisors
IOPS Information Operations Planning System
IOPS Internet Official Protocol Standards .
File Virtualization also requires a global namespace. A global namespace provides a centrally managed logical name that abstracts the physical location. DFS is part of the CIFS (Common Internet File System) The file sharing protocol used in Windows. It evolved out of the SMB (Server Message Block) protocol in DOS, which is why the terms CIFS/SMB and SMB/CIFS are sometimes seen. The word "Internet" in the CIFS name has little relevance. standards servicing the Windows environment. Automount is a de-facto standard supporting Unix/Linux environments. Both of these technologies provide out-of-band lookup and scale well by not impacting I/O operations. Both technologies have an unfair advantage by already having their client components present on Windows and Unix/Linux clients.
Enhancements to the presentation and management of these namespaces are required. IETF See Internet Engineering Task Force.
IETF - Internet Engineering Task Force is working on a single mount point namespace A collection of names for a particular purpose. Typically, each name is unique. For example, tables in a relational database must all have unique names. A Windows workgroup that uses the original NetBIOS naming system requires a different "made-up" name for each computer and printer in to be delivered as part of the NFS v4 standard.
While NFV requires a global namespace, it does not require a separate file system that resides in the network. A virtualization approach that places a proprietary namespace in the data path does not scale. Given the high number of files in a typical enterprise, a bundled global namespace and file system will not be able to attain global levels of scalability--there are simply too many files.
NFV leverages industry standard namespaces to perform directory look-up services, thus avoiding any requirements to load proprietary client software. Clients interrogate a namespace server to resolve the physical data location without incurring the limitations of routing I/O operations through a namespace server.
Global namespaces are an essential component of NFV. Using industry-standard global namespaces provides a safer, more scalable, and easier to deploy alternative than proprietary always-in-band approaches. Certainly, adoption of standards-based namespaces will outpace and ultimately supersede To obliterate, replace, make void, or useless.
Supersede means to take the place of, as by reason of superior worth or right. A recently enacted statute that repeals an older law is said to supersede the prior legislation. any proprietary in-band namespace solutions.
NFV: Changing Storage Management
NFV is changing network storage management by easing management overhead, increasing utilization, decreasing over-provisioning, resolving performance bottlenecks and lowering TCO (1) (Total Cost of Ownership) The cost of using a computer. It includes the cost of the hardware, software and upgrades as well as the cost of the inhouse staff and/or consultants that provide training and technical support. See ROI. . NFV allows administrators to support heterogeneous storage environments and to optimize networked storage across different vendor platforms and storage tiers.
NFV architectures support distributed enterprise-wide file access across multiple protocols, multiple operating systems and multi-vendor storage systems. NFV should therefore, be standards-based and operate in multi-vendor environments without needing a proprietary file system, file protocol switch or global namespace.
In traditional file server environments, adding data storage greatly increases management burdens and data exposure, and impacts performance and availability. NFV allows administrators across large-scale, multi-vendor storage environments to efficiently manage their NAS networks regardless of their size, regulatory requirements, data volumes, service levels, or high availability requirements.
Storage Management Challenges NFB Benefit Examples CAPACITY ISSUES INCREASED UTILIZATION * Average itilization is 35-50% Large ISP increased storage * Management per TB is not improving utilization to 90% and is able to * Over-provision is too costly respond to capacity issues without disrupting end-user data access. PERFORMANCE ISSUES PRODUCTIVITY IMPACTS * User productivity impacted by poor One of the largest US financial response time services firms achieved over a * Application throughput limited by half million in labor savings IO bandwidth alone through network file * New devices don't address virtualization bottlenecks TIERED STORAGE CAPEX SAVINGS * Nearline storage represents huge A major semiconductor company capital expenditure advantage over reduced storage CAPEX by 50% online through the greater use of SATA * Limitation to dynamically manage enabled by NFV. data between online and nearline STORAGE CONSOLIDATION BUSINESS EFFICIENCY * Consolidation projects slip Fortune 500 firm completed a 30TB because of the organizational consolidation project in 1/10th impacts the extimated time with a 4 week * Consolidations require data payback. relocation along with security and access settings
John Schroeder is president and CEO (1) (Chief Executive Officer) The highest individual in command of an organization. Typically the president of the company, the CEO reports to the Chairman of the Board. of Rainfinity (San Jose, CA)