Current implementations of backup processes are manual, labor intensive, and inundated with problems caused by human errors. Backups that fail can often go undetected leading to potential data loss following a failure. Tapes must be manually inserted, rotated, and removed for off-site transportation to ensure recoverability. Due to high expenses associated with manual administration, a case for automation can be made where robots are used to improve tape management. Centralized backups group tapes together by pools whereby a number of backups can be multiplexed onto a tape. As a tape is filled the backup continues using another free tape within the pool which significantly enhances manageability. A reduction in the number of tape drives to be managed leads to cost reduction.

Backups require an increase in application server activity in order to fetch data from disk and write to tape. Application servers are usually busy processing large volumes of latency and performance sensitive data. The extra CPU cycles consumed for data movement and scheduling while conducting backups can often prove costly to the application itself. A server-free solution is targeted at eliminating the performance impact of a backup when performed by the application server itself. This architecture migrates the data-mover and connection-broker roles to a dedicated backup server. A robust backup solution must address the following concerns:

1.Optimize use of backup resources including tapes, drives, and operating time

2.Minimize impact to application traffic

3.Segregate backup domains to reduce CPU overhead on application servers

The following section provides details on most common implementations of backup solutions.

LAN-Free Backup

LAN-ree backup enables each application server to move data directly to a tape device over the storage network without going through a dedicated backup server. Using a commonly known shared-storage option, each application server acts as a media server in that it moves backup data directly to tape. Each server then arbitrates for a tape drive and reserves that tape drive during the backup process. Application servers also can be configured using dedicated access to tape drives within the tape library unit instead of the shared option. The flow of data through the storage network allows for a reduction in LAN traffic. A tape may also be shared amongst applications with multiple backup streams multiplexed onto managed tape libraries and drives. The LAN may still be used to pass metadata, context tables that track location of changes in data, back and forth between the backup server and the client but actual backed-up data is passed over the storage network. A typical LAN-free implementation is depicted in the

figure below.

LAN-free backup segregates data and backup domains but doesn’t alleviate CPU load on the application servers that still must fetch backup data from disk. Server-less backup as described below addresses this concern.

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Cisco Systems MDS 9000 manual LAN-Free Backup
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MDS 9000 specifications

Cisco Systems MDS 9000 series is a line of storage networking switches designed to address the unique demands of enterprise-level data centers. These switches provide high-performance solutions for connecting various storage devices, including traditional disk arrays, solid-state drives, and tape libraries. The MDS 9000 series is built for scalability, high availability, and advanced security, making it an ideal choice for organizations looking to optimize their storage infrastructure.

One of the standout features of the MDS 9000 series is its support for Fibre Channel and FICON protocols, which enable seamless integration with various storage technologies. This versatility is crucial for organizations that may be using a mix of applications and storage performance requirements. The switches support multiple speeds, including 1G, 2G, 4G, 8G, and even 16G Fibre Channel rates, ensuring that they can adapt to evolving storage needs.

The MDS 9000 is known for its advanced features in terms of management and automation. Cisco provides intelligent automation capabilities to enhance operational efficiency. Features like Flow Vision and intelligent network services allow for deep visibility into storage environments, enabling administrators to monitor performance, troubleshoot issues, and optimize resource allocation effectively. This level of visibility helps organizations to mitigate risks and ensure data availability.

Security is another paramount consideration for the MDS 9000 series. The switches are equipped with a range of security features, including role-based access controls, encryption technologies, and zoning options. These capabilities help safeguard sensitive data and ensure compliance with industry regulations, making the MDS 9000 a trusted choice for enterprises dealing with critical data.

The architecture of the MDS 9000 series is designed for high availability and resiliency. With redundant power supplies and cooling systems, these switches minimize downtime and ensure continuous operation. Additionally, they offer advanced features like non-disruptive software upgrades, which eliminate the need for scheduled outages during firmware updates.

In summary, the Cisco Systems MDS 9000 series offers a robust set of features tailored for enterprise storage networking. Its support for various protocols, intelligent management capabilities, and high availability characteristics make it a preferred choice for organizations seeking to optimize their storage infrastructure for both current and future needs. By investing in the MDS 9000 series, businesses can enhance their operational efficiency, ensure data security, and maintain a competitive edge in today's data-driven landscape.
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