Source: Internet
Author: User

What I study:

Functional Principle Class:

Disk array installation configuration settings: When a disk array is first installed and a physical disk is added, the disk array installation accessory setting appears as a function that can be represented by the ISM client's GUI .

Summary: My understanding of disk arrays is as follows:

The disk array is comprised of a disk array controller and a disk enclosure. The disk shell is also composed of logical disks and physical disks.

Pool Understanding : In a disk array, the virtual media that makes up the raid is created by federating multiple physical disks, and the virtual media space is partitioned later to configure the logical disk. This virtual media is called pool. There are two types of pool in a disk array , one called the dynamic pool, and one called the base pool. Dynamic Pool may be created by the M series disk array.

Dynamic Pool: Dynamic pools are a way to manage the space above a pool using a virtual storage space . Like lock management in a file system, dynamic pool manages the space that has been used and the space that has not yet been used.

Configure logical disks: When you configure a logical disk, the space is split from the pool according to the demand capacity , and then the physical disk space is allocated to the corresponding logical disk space. The data for the logical disk is stored in the appropriate physical disk space. Because the address of the logical disk in the pool is hidden by the disk array, the user can use the logical disk without regard to its spatial location.

Advantages of dynamic pool : Using this dynamic pool can easily limit the number of physical disks associated with the pool and be able to mix configurations. With it, you can add some features, such as: Pool capacity expansion, logical disk capacity expansion. A logical disk created in a dynamic pool can be used quickly. The dynamic pool feature is a set of physical disk virtual storage pools on a disk array that is created. The logical disk allocates the required storage capacity for the operation of the unused space pool. If the storage capacity becomes shorter, you can add a physical disk to the pool as required to expand the unused space of the pool. An increased pool of unused space can be used to create a new logical disk or to expand the capacity of an existing logical disk while maintaining the current data. You can also put it back. Logical disks no longer require unused space in the pool's expansion pool. Dynamic library functions help manage the ability to efficiently store and significantly reduce costs and increase storage capacity. It also helps to flexibly support any configuration changes or enlarged storage due to new additions to the transaction or modifications.

Summary: My understanding of Dynamic pool is as follows:

Scenario one, when accessing data to a logical disk:



Summary: My understanding of Dynamic pool is as follows:

In case two, when the data is removed from the logical disk:



Code and functions:

No code learned today

Key words:

LD (logical disks) Logical Disk

GUI (graphical user Interface) Image Subscriber Interface

Disk Enclosure Enclosure


command line Interface (Shell interface)

NEC Storage Manager and NEC Storage baseproduct NEC Storage Management and NEC Storage Foundation Products

NEC Storage accesscontrol NEC Storage Data Control

NEC Storage dynamicdatareplication NEC Storage Dynamic Data replication

NEC Storage remotedatareplication NEC Storage Remote Data replication

NEC Storage volumeprotect NEC storage Group Products

NEC Storage storagepowerconserver NEC Storage storage Power Conservative

Trademarks trademark

Cache partitioning user ' s Manual for M series cache split for m - family owner's manual

Data Allocation optimization user ' s Manual allows optimization of owner's manual

Data Replication user ' s Manual ( function Data Recovery Manual (feature Wizard)


Data Replication User's Manual (Disaster Recovery system installation and Operation Guide) recovery Manual (Catastrophic recovery system initialization and optimization Wizard)

L2 Cache user ' s Manual L2 cache Owner's manual

Partitioning user's Manual Segmentation manual

Snapshot user ' s Manual (Function guide) snapshot owner's manual

Thin Provisioning User'sManual Subdivision manual

Storage Manager Command Reference Storage Management Commands Reference

Overview of disk array configuration Setting set profile

Issue tracking:

Problem one is how thepool learns how much physical disk space to allocate when storing data for logical disks. How does a logical disk specifically tell the pool How much space should be allocated? Show Curiosity!

Come tomorrow, and then do this, today because there are classes in the morning, so I learned a little, that learning is not enjoyable.


Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.