vb.net qr code reader free Configuring SANs: Dos and Don ts in Software

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Configuring SANs: Dos and Don ts
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Configuring SANs: Dos and Don'ts Functional support servers might include Financial
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Personnel systems Engineering applications Amount of attached disk storage Storage growth rates Storage space reserved for growth (headroom) Availability requirements Server downtime Associated downtime cost Server hardware and software costs Maintenance costs Administration required to keep servers up and running
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3. Identify SAN benefits.
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Server and storage consolidation Efficient use of server and storage resources Improved staff productivity Lower platform costs Better use of the infrastructure
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4. Identify SAN costs. Identify new components required for building and maintaining the SAN:
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Software licenses Switches Fibre Channel host bus adapters (HBAs) Optical cables Service costs in deployment
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5. Calculate your ROI. There are a number of standard ROI calculations commonly used today, such as
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Net present value (in dollars)
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Configuring SANs: Dos and Don ts
4 Internal rate of return (as a percentage) Payback period (in months) Net present value (NPV). A method to evaluate investments in which net present value of all cash flow is calculated using a given discount rate. Internal rate of return (IRR). A discount rate where the present value of the future cash flow of investment equals the cost of investment.
These are defined as
Payback period. Length of time needed to recoup the cost of capital investment on a nondiscounted basis. Establishing and calculating an ROI enables you to remain focused on infrastructure-based problems and provides reduced deployment risks through phased SAN deployment. This helps keep investments limited to solutions and creates investment bases for the future. Initial investments will improve the ROI when other scenario investments are reduced. You should have the following detailed results from an interview process that define what the SAN needs to accomplish for you:
Technical requirements document Operating system to be installed Patch or service pack level Whether fabric HBA/controller drivers are available, and if so, are they well tested How many HBAs will it have If there is more than one HBA, what software will be used to provide failover or performance enhancements of multiple paths Private loop, public loop, or fabric connection Applications that will run host databases, e-mail, data replication, or file sharing Storage requirements Will storage requirements change over time
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Configuring SANs: Dos and Don ts
Configuring SANs: Dos and Don'ts
Physical dimensions How heavy will it be Does it require a rack mount A rack kit A shelf set Management console If so, what type is it Traditional keyboard/video/mouse (KVM) combo Serial connection, such as a TTY Do interfaces exist Do they need to be purchased Make, model, and version information How many Ethernet interfaces What temperature range for operation Telephone line requirements Node location Timeline for implementation Required purchases SAN design
Answers to these questions will be used throughout the life of your SAN. The timeline will be the framework of activities for the SAN life cycle. These documents will be used in approval processes during implementation and maintenance phases as SAN deliverables. If major changes to your SAN environment are necessary, your SAN life cycle will be repeated, and another set of documentation will need to be produced.
Interoperability Issues
Currently, interoperability is limited. Equipment from different manufacturers often will not work in an interoperative fashion despite common software and hardware interfaces. Third-party testing has become necessary to ensure interoperability. The Fibre Channel market is widely accepted as the most innovative SAN development solution at this time. Integrated software companies play a major role in the development of SANs. System managers and administrators need to recognize that this is a fact.
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