Transcript Block Storage Provisioning and Management

Block Storage Provisioning and Management
Upon completion of this module, you should be able to:
• Describe configuration guidelines for provisioning storage
• Configure and manage storage objects
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Block Storage Provisioning and Management
Lesson 1: VNX Storage Objects
This lesson covers the following topics:
• General considerations
• Storage Pools and RAID Groups
• LUNs
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General Considerations for Configuring Storage
• Drive types
 Drives selection should be based upon the expected workload
 FLASH for extreme performance
 SAS for general performance
 NL-SAS for streaming, aging data and archives, and backups
• RAID levels
 Match the appropriate RAID level with the expected workload
 RAID 1/0 for heavy transactional random writes (> 25%)
 RAID 5 for medium-high performance, general workloads, and
sequential I/O
 RAID 6 for NL-SAS read-based workloads and archives
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Pool vs. RAID Group
Pool Example
Extreme Performance Tier (SSD)
RAID Group Examples
RAID 1/0: (4+4)
RAID 1/0: (4+4)
RAID Group 0
RAID 5: (4+1)
RAID Group 1
Performance Tier (SAS)
RAID 5: (8+1)
RAID 5: (8+1)
RAID 5: (8+1)
RAID Group 2
RAID 6: (6+2)
RAID Group 3
Capacity Tier (NL-SAS)
RAID 6: (14+2)
RAID 6: (14+2)
RAID Group 4
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Pool Considerations
Pools can contain a few or hundreds of disks
• Spreads workloads over many resources
• Can contain a single drive type (homogeneous) or multiple drive types
(heterogeneous)
• Building blocks for FAST VP operations
RAID Configuration is moved from the pool level to the tier level
• Users can select RAID protection by tier
• Mixed RAID types supported within a Pool
• Once the tier is created, the RAID Configuration for that tier in that pool
cannot change
Multi-Pool Support
• Separate workloads for different I/O profiles
• Dedicate resources for performance goals
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RAID Group Considerations
Drive count
Drive location
Large element
size
• Limited to a single drive type and a
maximum of 16 drives per RAID group
• Drives can be selected from the same bus
(horizontal) or different busses (vertical)
• Best practice is to use horizontal selection
• Used on 4 +1 RAID 5 groups when the
predominant workload is large-block
random read activity
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Thick LUNs
Capacity of a thick LUN, is distributed
equally across the disks in the pool
Capacity of a thick LUN, same as the user
capacity seen by the server
• Full capacity allocated at time of creation
Uses slightly more capacity than user data
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Thin LUNs
Capacity visible to the server is independent of
the available physical storage in the pool
Competes with other LUNs in the pool for the
pool’s available storage
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
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Classic LUNs
Created on RAID Groups
All space allocated at creation time
• LBAs are physically contiguous
Predictable performance and data layout
Support active-active host access
• Simultaneous access through SPA and SPB
• Trespassing of LUNs no longer required
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Block Storage Provisioning and Management
Lesson 1: Summary
During this lesson the following topics were covered:
• General considerations
• Storage Pools and RAID Groups
• LUNs
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Block Storage Provisioning and
Management
Lesson 2: Managing Storage Objects
This lesson covers the following topics:
• Creating Storage Pools
• Creating LUNs
• Displaying and monitoring storage objects
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Provisioning Storage with Unisphere
The Pools tab is selected by default
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Creating a Storage Pool
Multiple combo boxes
will be shown for the
level of performance
that can be achieved
with the installed disk
types
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Creating a Pool LUN
Thin LUNs are created by
default. To create a Thick
LUN uncheck the Thin
box.
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Displaying Pool Properties (General Tab)
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Displaying Pool Properties (Disks Tab)
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Displaying Pool Properties (Advanced Tab)
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Displaying Pool Properties (Tiering Tab)
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Displaying Pool LUN Properties (General Tab)
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Displaying Pool LUN Properties
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Creating a Storage Pool: RAID Group (General Tab)
Users have the option to
manually select the
disks for the RAID
Group
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Creating a Storage Pool: RAID Group (Advanced
Tab)
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Creating a RAID Group LUN (General Tab)
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Creating a RAID Group LUN (Advanced Tab)
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Displaying RAID Group Properties
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Displaying RAID Group LUN Properties (General
Tab)
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Displaying RAID Group LUN Properties
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Block Storage Provisioning and
Management
Lesson 2: Summary
During this lesson the following topics were covered:
• Creating Storage Pools
• Creating LUNs
• Displaying and monitoring VNX storage
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Summary
Key points covered in this module:
• Described characteristics of VNX storage objects such as pools,
LUNs, disks, and RAID Groups.
• Considerations for employing the different storage object
options
• Both thick and thin LUNs can share the same pool
• Steps to create Pool and RAID Group storage pools, and thin and
thick LUNs from these pools.
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