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333 vnx unifiedimp_m02 block storage provisioning and management
- 1. Module 2: Block Storage Provisioning and Management Upon completion of this module, you should be able to: • Configure RAID Groups • Configure traditional LUNs • Configure Pools and Pool LUNs • Describe differences between thin and thick LUNs Copyright © 2011 EMC Corporation. All Rights Reserved. Block Storage Provisioning and Management 1
- 2. Module 2: Storage Provisioning and Management Lesson 1: Configuring RAID Groups and Traditional LUNs During this lesson the following topics are covered: • Configure RAID Groups • Configure traditional LUNs • Provision storage using the Disk provisioning Wizard for File Copyright © 2011 EMC Corporation. All Rights Reserved. Block Storage Provisioning and Management 2
- 3. Provisioning Storage in Unisphere Overview • Storage > Storage Configuration ` Copyright © 2011 EMC Corporation. All Rights Reserved. Storage Provisioning and Management 3
- 4. Creating RAID Groups • Storage > Storage Configuration > Storage Pools Copyright © 2011 EMC Corporation. All Rights Reserved. Block Storage Provisioning and Management 4
- 5. Displaying RAID Group Properties Copyright © 2011 EMC Corporation. All Rights Reserved. Block Storage Provisioning and Management 5
- 6. Creating a Traditional (RAID Group) LUN Copyright © 2011 EMC Corporation. All Rights Reserved. Block Storage Provisioning and Management 6
- 7. Displaying Traditional RAID Group LUN Properties Copyright © 2011 EMC Corporation. All Rights Reserved. Block Storage Provisioning and Management 7
- 8. Storage Provisioning Wizard for File – Express Mode Copyright © 2011 EMC Corporation. All Rights Reserved. Block Storage Provisioning and Management 8
- 9. Storage Provisioning Wizard for File – Custom Mode Copyright © 2011 EMC Corporation. All Rights Reserved. Block Storage Provisioning and Management 9
- 10. Module 2: Storage Provisioning and Management Lesson 2: Configuring Pools, Thin and Thick LUNs During this lesson the following topics are covered: • Configure a homogeneous Pool • Describe the differences between Thin LUNs and Thick LUNs • Identify the benefits of Pool LUNs • Configure Pool LUNs Copyright © 2011 EMC Corporation. All Rights Reserved. Block Storage Provisioning and Management 10
- 11. Creating a Pool Copyright © 2011 EMC Corporation. All Rights Reserved. Block Storage Provisioning and Management 11
- 12. Displaying Pool Properties Copyright © 2011 EMC Corporation. All Rights Reserved. Block Storage Provisioning and Management 12
- 13. Expanding Pools Copyright © 2011 EMC Corporation. All Rights Reserved. Block Storage Provisioning and Management 13
- 14. Thick LUNs • Capacity of a thick LUN, is distributed equally across the disks in the pool on which you create the LUN This behavior changes once data is added from hosts and additional disks are added to the Pool Incoming data will be added to the new disks only until all disks are equally populated again • Capacity of a thick LUN, is the same as the user capacity that the server’s operating system sees • A thick LUN uses slightly more capacity than the amount of user data written to it due to the metadata • A thick LUN can never run out of space. Copyright © 2011 EMC Corporation. All Rights Reserved. Block Storage Provisioning and Management 14
- 15. Thin LUNs • Supported for storage systems with the Thin Provisioning enabler • Competes with other LUNs in the pool for the pool’s available storage • Capacity of the thin LUN that is visible to the server is independent of the available physical storage in the pool • A thin LUN can run out of disk space if the pool to which it belongs runs out of disk space • A thin LUN uses slightly more capacity than the amount of user data written to it due to the metadata Copyright © 2011 EMC Corporation. All Rights Reserved. Block Storage Provisioning and Management 15
- 16. Creating Pool LUNs Thick LUNs are created by default, select the “Thin” box to create a thin LUN Copyright © 2011 EMC Corporation. All Rights Reserved. Block Storage Provisioning and Management 16
- 17. Example of Creating a Thick LUN – General tab Copyright © 2011 EMC Corporation. All Rights Reserved. Block Storage Provisioning and Management 17
- 18. Example of Creating a Thick LUN – Advanced tab Copyright © 2011 EMC Corporation. All Rights Reserved. Block Storage Provisioning and Management 18
- 19. LUN Folders Copyright © 2011 EMC Corporation. All Rights Reserved. Block Storage Provisioning and Management 19
- 20. Module Summary Key points covered in this module: • RAID Group configuration • Traditional LUN configuration • Storage provisioning wizard for File • Thick, Thin and Pool LUN configuration • Compare Thick and Thin LUNs Copyright © 2011 EMC Corporation. All Rights Reserved. Block Storage Provisioning and Management 20
- 21. Check Your Knowledge • Which is selected by default when configuring a RAID Group? The RAID Groups tab The Pools tab The vault disks A Hot Spare disk • Which option does the Create LUNs General tab allow the user to configure? Fast cache settings on EFD disks Parity depth for the created LUN Host WWN to access the LUN The number of LUNs to create • Which is a condition for Thin LUNs? They have no default SP owner They run out of space if its pool is out of space LUN write cache can be oversubscribed Use space from all available LUN pools Copyright © 2011 EMC Corporation. All Rights Reserved. Block Storage Provisioning and Management 21
- 22. Check Your Knowledge - Answers • Which is selected by default when configuring a RAID Group? The RAID Groups tab The Pools tab*** The vault disks A Hot Spare disk • Which option does the Create LUNs General tab allow the user to configure? Fast cache settings on EFD disks Parity depth for the created LUN Host WWN to access the LUN The number of LUNs to create*** • Which is a condition for Thin LUNs? They have no default SP owner They run out of space if its pool is out of space*** LUN write cache can be oversubscribed Use space from all available LUN pools Copyright © 2011 EMC Corporation. All Rights Reserved. Block Storage Provisioning and Management 22
Hinweis der Redaktion
- This module will discuss the guidelines and benefits for creating RAID Groups, Pools and configuring traditional, thick and thin LUNs.
- This lesson covers the guidelines and configuration steps for creating RAID Groups and Traditional LUNs.
- Shown here is the main Storage Provisioning window in Unisphere. The page offers several options for provisioning the storage on the system. In the Wizards section at the top right of the screen are the main tools for provisioning storage to FILE or BLOCK devices. The “Disk Provisioning Wizard for File”automates the provisioning of storage to be used for FILE storage operations. The “Storage Assignment Wizard for Block” automates the provisioning of storage to be used for BLOCK storage operations.A more manual method for provisioning the storage is available by selecting the “Storage Pools” option. Using this method offers more control of storage provisioning for customized provisioning needs. This method allows a selection for creating “Pools” of storage that can use the Advanced Data Services such as FAST, Thin and Thick LUNs and Compression which will be discussed further in this module. Storage can also be provisioned into “RAID Groups” for the creation of Traditional LUNs which will also be discussed further in this module. Storage provisioned in “Pools” that utilize Advanced Data Services or “RAID Groups” can then be allocated and used for FILE storage or BLOCK storage operations.
- To configure a RAID group, select “Storage“ from the menu and choose “Storage Pools” By default the “Pool” tab is highlighted so users must select the “RAID Groups” tab and then “Create”. Users configure the RAID group parameters for “Storage Pool ID”, “RAID Type”, and the “Number of Disks” using the dropdown menus available from the “General” tab. By default, Unisphere will select the disks that will be used in the group automatically as shown by the “Automatic” radio button, however, users have the option to select the disk “Manually” as well if needed. Note the checkbox for “Use Power Saving Eligible Disks” which is not present when creating a “Pool”The “RAID Group Advanced Parameters” contains two configurable parameters.If selected, the “Automatically delete after last LUN is Unbound” will destroy this RAID Group after all LUNs belonging to this RAID Group are unbound. When cleared, the RAID Group is not destroyed. If selected, the “Expansion/Defragmentation Priority” will set the relative importance of expanding or defragmenting a RAID Group. Valid selections are Low, Medium, and High.Users can also select the “Allow Power Savings” parameters for the RAID Group if the group contains eligible disks.
- To provision storage for File quickly and easily, open the Storage page and click on “Disk Provisioning Wizard for File” under Wizards. The Wizard has two modes of operation, Express and Custom. With Express mode selected the wizard will configure all of the VNX storage automatically using Best Practices. All of the storage provisioned will be allocated for File storage, no storage will be reserved for other hosts. The wizard displays several screens providing a breakdown of the allocation of disks, and a task status for the provisioning to complete.The wizard performs provisioning by selecting the available disks and creating RAID Groups. Traditional LUNs are then created from the RAID Groups.
- Using the provisioning wizard with Custom mode selected, the wizard will provides the operator more control of the VNX storage allocation. The custom provisioning tool only allows three RAID types; RAID5 for Capacity, RAID 6 for Protection, and RAID 1/0 for Performance. If other RAID types are required, they must be configured outside of the Provisioning Wizard tool. The Storage Provisioning Wizard allows hot spares and reserve disks to be configured. It will report any drives that are not set to be allocated. Hot spares are important to have as they temporarily replace a failed drive until a replacement can be installed. Reserving disks for future use is important if the user desires to provision disks to other hosts now or in the future. They can also be provisioned to the VNX platform for File at a later date. Once all the provisioning options are selected, the wizard displays the status of the provisioning.As with the Express mode, the Custom mode provisions storage by creating RAID Groups and Traditional LUNs.
- This lesson covers the process of creating Pool, Thin and Thick LUNs.
- Similar to a RAID Group, Pools can be expanded to increase the usable capacity. Right click on the pool, select “Expand”. From the “Expand Storage Pool “ window, select the number of disks by using the dropdown arrow. Available disks are selected “Automatically’ or the user can select the “Manual” radio button and move selected disks to the right window. Expansion progress can be viewed from the Thin Pool properties window.Large pools may not be able to be created in a single step. In addition, a large number of drives may not be added to a pool at one time. This restriction is to allow for the Pool to initialize and become fully functional on-demand. The maximum number of drives that can be used to create or add-to a pool at one time is model dependent.
- The capacity of a thick LUN, like the capacity of a RAID group LUN, is distributed equally across the disks in the pool on which you create the LUN. This behavior changes once data is added from hosts and additional disks are added to the Pool. Then all incoming data will be added to the new disks only until all disks are equally populated again.The amount of physical space allocated to a thick LUN, like the capacity of a RAID group LUN, is the same as the user capacity that the server’s operating system sees. A thick LUN uses slightly more capacity than the amount of user data written to it due to the metadata required to reference the data. Unlike a thin LUN, a thick LUN can never run out of space.
- The primary difference between a thin LUN as compared to traditional LUNs and thick pool LUNs is that thin LUNs present more storage to an application than is physically allocated. Thin LUNs incrementally add to their in-use capacity. When a thin LUN requires additional physical storage, capacity is non-disruptively and automatically added from a storage pool, that is, Thin LUNs consume storage as needed from the underlying pool.
- Listed are the key points covered in this module.
- Test the knowledge acquired through this training by answering the questions in this slide. Continue to the next page for the answer key.
- Displayed here are the answers from the previous slide. Please take a moment to review them.