DS8000存储容灾技术概述(共66张PPT)

Array Site, Array 配置示例
DS8000 逻辑配置－Rank
•When a new rank is defined, its name is chosen by the DS Storage Manager For example: R1, R2, or R3, and so on •You have to add an array to a rank •Process of forming a rank: The array is formatted for either FB (open systems) or CKD (zSeries) data. This determines the size of the set of data contained on one disk within a stripe on the array. •The capacity of the array is subdivided into equal sized partitions, called extents. The extent size depends on the extent type, FB or CKD •One extent is the minimum physical allocation unit when a LUN or CKD volume is created
DS8000存储容灾技术
2010年5月
目录
1 DS8000存储介绍
2 DS8000存储容灾方案介绍
3Leabharlann 东四容灾方案介绍4
DS8000存储PPRC介绍
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DS8000 硬件图示
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DS8000 组件－FramesFrames
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DS8000 体系架构
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DS8000 逻辑配置－磁盘虚拟化
将物理磁盘组成逻辑卷，提供给服务器使用，使得这 些逻辑卷看起来像是物理磁盘一样
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DS8000 逻辑配置层次
•One array site used to construct one RAID Array (8 DDMs) RAID 5, 10, 6 •1 Array per Rank Rank can be CKD or FB1-N ranks in Extent Pool Associated with Server0 or Server1 Divided into Extents •Volumes are made in Extent Pool
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DS8000 逻辑配置－Array
•An array is created from one array site. •Forming an array means defining it for a specific RAID type RAID 5, 10 ,6 •In the DS8000 current implementation, one array is defined using one array site According to the DS8000 sparing algorithm, from zero to two spares may be taken from the array site •An array is formed using one array site and while the array could be accessed by each adapter of the device adapter pair, it is managed by one device adapter Which adapter and which server manages this array are defined later in the configuration path •D1, D2, D3, and so on, stand for the set of data contained on one disk within a stripe on the array •If, for example 1 GB of data is written, it is distributed across all the disks of the array
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DS8000 逻辑配置层次（续）
•Volumes or LUNs Made up of extents from one extent pool Min size 0.1 GB or 1 cylinder Max size 2 TB (FB) 56 GB(CKD) Associated with LSS during configuration •Volume Group Contains LUNsand host attachments --FB LUN masking One host attachment (one port or port group) can be member of only one volume group One volume can be member of multiple volume groups Multiple hosts (even different open systems server types) can be member of the same volume group •Host Multiple server ports can be specified (in one or more groups) in one host definition
DS8000 逻辑配置－Extent Pool
An extent pool is a logical construct to aggregate the extents from a set of ranks to form a domain for extent allocation to a logical volume Same RAID type and the same disk RPM characteristics •So that the extents in the extent pool have homogeneous characteristics No predefined affinity of ranks or arrays to a storage server The affinity of the rank (and it's associated array) to a given server is determined at the point it is assigned to an extent pool When assigned to extent pools ranks are organized in two rank groups: Rank group 0 is controlled by server 0 Rank group 1 is controlled by server 1 One or more ranks with the same extent type can be assigned to an extent pool One rank can be assigned to only one extent pool. There can be as many extent pools as there are ranks. At least two extent pools (one per server to balance the activity) of each type CKD or FB Additional extent pools may be used to segregate ranks with different DDM types