1 Data Center Design & Virtualization Md. Jahangir Hossain Open Communication Limited
2 Objectives Data Center Architecture Data Center Standard Data Center Design Model Application Design Server Virtualization Server Clustering Storage Technologies Case Study
3 Data Center Overview The data center is home to the computational power, storage, and applications necessary to support an Enterprise business. The data center infrastructure is central to the IT architecture, from which all content is sourced or passes through. Proper planning of the data center infrastructure design is critical, and Performance, resiliency, and scalability need to be carefully considered. The data center network design is based on a proven layered approach, which has been tested and improved over the past several years in some of the largest data center implementations in the world. The layered approach is the basic foundation of the data center design that seeks to improve scalability, Performance, flexibility, resiliency, and maintenance.
4 Green Data Center
8 Data Center standard
9 Data Center Standard -TierLevel1 -TierLevel2 -TierLevel3 -TierLevel4 Tier 1 to 4 data center is nothing but a standardized methodology used to define uptime of data center. This is useful for measuring: a) Data center performance b) Investment c) ROI (return on investment) Note: Access Control Should be considerable for Data Center standard
10 Tier Level 1 Single non-redundant distribution path serving the IT equipment Non-redundant capacity components Basic site infrastructure guaranteeing % availability Tier Level 2 Fulfills all Tier 1 requirements Redundant site infrastructure capacity components guaranteeing % availability
11 Tier Level 3 -FulfillsallTier1andTier2requirements - Multiple independent distribution paths serving the IT equipment - All IT equipment must be dual-powered and fully compatible with the topology of a site's architecture - Concurrently maintainable site infrastructure guaranteeing % availability Tier Level 4 -FulfillsallTier1,Tier2andTier3requirements - All cooling equipment is independently dual-powered, including chillers and heating, ventilating and air-conditioning (HVAC) systems - Fault-tolerant site infrastructure with electrical power storage and distribution facilities guaranteeing % availability
12 Data Center Design Model -Multi Tier Model
13 Multi -Tier Model The multi-tier data center model is dominated by HTTP-based applications in a multi-tier approach. The multi-tier approach includes web, application, and database tiers of servers. Today, most web-based applications are built as multitier applications. The multi-tier model uses software that runs as separate processes on the same machine using interprocess communication (IPC), or on different machines with communications over the network. Typically, the following three tiers are used: Web-server Application Database Multi-tier server farms built with processes running on separate machines can provide improved resiliency and security.
16 Physical segregation improves performance because each tier of servers is connected to dedicated Hardware. The advantage of using logical segregation with VLANs is the reduced complexity of the Server farm. The choice of physical segregation or logical segregation depends on your specific network performance requirements and traffic patterns.
18 Application Design
19 Application Design Model -OneTierModel - Two Tier Model -ThreeTierModel -NTierModel
26 Objectives - Virtualization - Virtualization in Brief - Server Virtualization - The Technology of the future - Server virtualization best practices - Solution for server virtualization
31 Server Virtualization Best Practices
52 Solution for Virtualization VMware KVM ( Kernel-based Virtual Machine) Virtual Box Windows 2008 with Hyper-V XEN Citrix
53 Customer-Proven Solution Banks: commercial & saving Aerospace and Defense Companies Internet Service provider Airlines Chemical Companies Diversified Financial Companies Energy Companies Entertainment companies Pharmaceutical Companies Securities companies
54 Server Clustering
55 Clustering A computer cluster is a group of linked computers, working together closely thus in many respects forming a single computer. The components of a cluster are commonly, but not always, connected to each other through fast local area networks. Clusters are usually deployed to improve performance and availability over that of a single computer, while typically being much more cost-effective than single computers of comparable speed or availability. Types of Cluster: -High-availability(HA) clusters -Load-balancing clusters -Compute clusters
57 Storage Technologies
58 Storage Technologies DAS (Direct Attached Storage) NAS (Network Attached Storage) SAN (Storage Area Network)
59 DAS means each server has dedicated storage that is directly connected to that device. The storage device is seen and accessed by a single host system, and in the event that another host system will need additional storage, that host will add more physical storage and/or I/O interfaces or host bus adapters.
60 NAS is storage that is connected directly to a network, such as a LAN, that provides file-level access to data using standard protocols such as NFS (Network File System) or CIFS (Common Internet File System).
61 NAS (1) Computer systems can access data from a NAS appliance over anetworkviaafile"redirector"thatchangestheaccesstoafile from the native file system (on the originating computer system) to a network operation using TCP (Transmission Control Protocol) to a remote server that is running software to provide the file system to support the individual client access. The file system on the NAS server determines the location of the data requested by the application client whether it is in its cache or on the storage. NAS mainly focuses on applications, users, and the files and data that they share.
62 SAN (Storage Area Network) A storage area network (SAN) is a dedicated storage network that provides access to consolidated, block level storage. SANs primarily are used to make storage devices (such as disk arrays, tape libraries, and optical jukeboxes) accessible to servers so that the devices appear as locally attached to the operating system. A SAN typically has its own network of storage devices that are generally not accessible through the regular network by regular devices. --Focuses on disks, tapes, and a scalable, reliable infrastructure to connect them --Backup solutions (tape sharing) --Disaster tolerance solutions (distance to remote location) --Reliable, maintainable, scalable infrastructure
65 Major Difference between NAS and SAN The Wires. --NAS uses TCP/IP Networks: Ethernet, FDDI, ATM (perhaps TCP/IP over Fibre Channel someday) --SAN uses Fibre Channel, Ethernet. The Protocols. --NAS uses File Server Protocols: NFS, CIFS, and HTTP. --SAN uses Encapsulated SCSI.
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