Clustered Data ONTAP® 8.2

Logical Storage Management Guide

What logical storage is
How volumes work
What a FlexVol volume is
- Capabilities that FlexVol volumes provide
- Differences among FlexVol volume features
What an Infinite Volume is
- Capabilities that Infinite Volumes provide
Comparison of FlexVol volumes and Infinite Volumes
How FlexVol volumes and Infinite Volumes share aggregates
How security styles affect data access
Improving client performance with traditional and lease oplocks
What system volumes are
Using FlexVol volumes
Differences between 64-bit and 32-bit FlexVol volumes
- Interoperability between 64-bit and 32-bit FlexVol volumes
How FlexVol volumes work with Vservers
- How the Vserver affects which aggregates can be associated with a FlexVol volume
- How the Vserver can limit how many FlexVol volumes it can have
- How the Vserver affects the language of the FlexVol volume
- Restoring a Vserver's root volume
What volume junctions are
How you use space management capabilities
- How volume guarantees work with FlexVol volumes
- How file and LUN reservations work for FlexVol volumes
- Considerations for setting fractional reserve for FlexVol volumes
- How Data ONTAP can automatically provide more space for full FlexVol volumes
  - Selecting the first method to increase space for full FlexVol volumes
- How a FlexVol volume can automatically change its size
- How a FlexVol volume can reclaim free space from FlexClone LUNs
- Deleting Snapshot copies automatically
- How to determine space usage in a volume or aggregate
- Methods to create space in a FlexVol volume
- Methods to create space in an aggregate
- How the FlexVol volume and aggregate fullness alerts work
  - How volume fullness alerts work with the volume autogrow capability
Cautions and considerations for changing file or directory capacity
- Considerations for changing the maximum number of files allowed on a FlexVol volume
- Cautions for increasing the maximum directory size for FlexVol volumes
Rules governing node root volumes and root aggregates
Basic FlexVol volume management
- Creating a FlexVol volume
- Deleting a FlexVol volume
- Controlling and monitoring I/O performance to FlexVol volumes by using Storage QoS
- Displaying file or inode usage
- Commands for managing FlexVol volumes
- Commands for displaying space information
Moving and copying volumes (cluster administrators only)
- How moving a FlexVol volume works
- Commands for moving volumes
- Moving a volume
- SnapMirror transfers can affect volume move operations
- Characteristics of how Data ONTAP copies FlexVol volumes
- Copying a FlexVol volume
Using FlexCache volumes to accelerate data access
- What a cached file contains
- How FlexCache volumes serve read requests
- Why you use FlexCache volumes
- Considerations for working with FlexCache volumes
- Limitations of FlexCache volumes
- Example of FlexCache deployment in clustered Data ONTAP environment
- What cache policies are
- How data changes affect FlexCache volumes
- How cache consistency is achieved
- What cache hits and misses are
- How autosizing of FlexCache volumes improves caching performance
- How FlexCache volumes share space with other volumes
- How FlexCache volumes are impacted during loss of connectivity
- How NVRAM failures on the origin volume impact FlexCache volumes
- How FlexCache volumes work during a failover
- Comparison of FlexCache volumes and load-sharing mirrors
- Commands for managing FlexCache volumes
Using FlexClone volumes to create efficient copies of your FlexVol volumes
- Understanding FlexClone volumes
- FlexClone volumes and shared Snapshot copies
  - How to identify shared Snapshot copies in FlexClone volumes
- How you use volume SnapMirror replication with FlexClone volumes
- Considerations for creating a FlexClone volume from a SnapMirror source or destination volume
- How splitting a FlexClone volume from its parent works
- FlexClone volumes and LUNs
- Understanding data protection FlexClone volumes
- Creating a FlexClone volume
- Splitting a FlexClone volume from its parent
- Determining the space used by a FlexClone volume
Using FlexClone files and FlexClone LUNs to create efficient copies of files and LUNs
- Benefits of FlexClone files and FlexClone LUNs
- How FlexClone files and FlexClone LUNs work
- Considerations for working with FlexClone files and FlexClone LUNs
- Creating a FlexClone file or FlexClone LUN
- Viewing the space savings due to FlexClone files and FlexClone LUNs
- How a FlexVol volume can reclaim free space from FlexClone LUNs
  - Configuring a FlexVol volume to automatically delete FlexClone LUNs
  - Preventing a specific FlexClone LUN from being autodeleted
- Features supported with FlexClone files and FlexClone LUNs
Using a load-sharing mirror to balance loads
- Considerations when working with load-sharing mirrors
- Mounting a FlexVol volume that has load-sharing mirrors for NFS clients
- Mounting a FlexVol volume that has load-sharing mirrors for CIFS clients
- Restriction when modifying the source volume
- Creating a set of load-sharing mirrors
- Adding a load-sharing mirror to a set of load-sharing mirrors
  - Initializing an individual load-sharing mirror
- Updating a set of load-sharing mirrors
- Aborting an update to a load-sharing mirror
- Scheduling SnapMirror transfers
- Changing mirror relationship schedules
- Listing the schedule state of a mirror relationship
- Showing the status of a particular load-sharing mirror
- Determining whether load-sharing mirrors are up-to-date
- Recovering a lost source FlexVol volume from a mirror
- Deleting a mirror copy
Using qtrees to partition your FlexVol volumes
- When to use qtrees
- How qtrees compare with FlexVol volumes
- Qtree name restrictions
- What you can do with qtrees on a mirror
- Converting a directory to a qtree
  - Converting a directory to a qtree using a Windows client
  - Converting a directory to a qtree using a UNIX client
- Commands for managing qtrees
Using quotas to restrict or track resource usage
- Why you use quotas
- Overview of the quota process
  - Differences among hard, soft, and threshold quotas
  - Understanding quota notifications
- What quota rules, quota policies, and quotas are
- Quota targets and types
- Special kinds of quotas
  - How default quotas work
  - How you use explicit quotas
  - How derived quotas work
  - How you use tracking quotas
- How quotas are applied
- Considerations for assigning quota policies
- How quotas work with users and groups
  - How you specify UNIX users for quotas
  - How you specify Windows users for quotas
  - How default user and group quotas create derived quotas
  - How quotas are applied to the root user
  - How quotas work with special Windows groups
  - How quotas are applied to users with multiple IDs
  - How Data ONTAP determines user IDs in a mixed environment
  - How quotas with multiple users work
  - How you link UNIX and Windows names for quotas
- How quotas work with qtrees
  - How tree quotas work
  - How user and group quotas work with qtrees
  - How default tree quotas on a FlexVol volume create derived tree quotas
  - How default user quotas on a FlexVol volume affect quotas for the qtrees in that volume
- How qtree changes affect quotas
  - How deleting a qtree affects tree quotas
  - How renaming a qtree affects quotas
  - How changing the security style of a qtree affects user quotas
- How quotas are activated
  - When you can use resizing
  - When a full quota reinitialization is required
- How you can view quota information
  - How you can use the quota report to see what quotas are in effect
  - Why enforced quotas differ from configured quotas
  - Using the quota report to determine which quotas limit writes to a specific file
  - Commands for displaying information about quotas
  - When to use the volume quota policy rule show and volume quota report commands
- Difference in space usage displayed by a quota report and a UNIX client
  - How a quota report accounts for disk space and file usage
  - How the ls command accounts for space usage
  - How the df command accounts for file size
  - How the du command accounts for space usage
- Examples of quota configuration
- Setting up quotas on a Vserver with FlexVol volumes
- Making minor changes to existing quota limits
- Reinitializing quotas after making extensive changes
- Verifying status of quota upgrades
- Commands to manage quota rules and quota policies
- Commands to activate and modify quotas
Using Infinite Volumes
What an Infinite Volume is
Capabilities that Infinite Volumes provide
Creating an Infinite Volume (express setup)
- Choosing aggregates for an Infinite Volume
- Creating a Vserver with Infinite Volume
- Creating an Infinite Volume using default settings
Setting up and managing an Infinite Volume (overview)
Setting up and managing an Infinite Volume with storage classes (overview)
Requirements for Infinite Volumes
- Platforms supported by Infinite Volumes
- Node requirements for Infinite Volumes
- Vserver requirements for Infinite Volumes
- Aggregate requirements for Infinite Volumes
- Junction naming requirements for Infinite Volumes
Decisions to make before you create an Infinite Volume
- Considerations when using storage classes
- Considerations when using thin provisioning with Infinite Volumes
- Space considerations for using incremental tape backup
- Constituent size requirements for setting up data protection mirror relationships for Infinite Volumes
How Infinite Volumes use storage classes and data policies
- What a storage class is
- How storage classes affect which aggregates can be associated with Infinite Volumes
- How storage classes relate to storage services
- What rules and data policies are
- How a data policy is automatically created and starts filtering data
- Commands disabled for Infinite Volumes with storage classes
- Tasks and tools for managing Infinite Volumes with storage classes and data policy
- Interoperability between Infinite Volumes with storage classes and Data ONTAP features
- Managing a data policy for a Vserver with Infinite Volume
What Infinite Volume constituents are
- What a namespace constituent is
- What data constituents are
- What a namespace mirror constituent is
- When namespace mirror constituents are created
Planning aggregates for an Infinite Volume
- How aggregates and nodes are associated with Infinite Volumes
- How much space namespace-related constituents require
- How data constituents use aggregate space
- How node balancing affects an Infinite Volume's size and aggregate use
Creating Infinite Volumes for specific scenarios
- How space is allocated inside a new Infinite Volume
- Examples of how space is allocated in Infinite Volumes
- Creating an Infinite Volume with dedicated aggregates
- Creating an Infinite Volume in a dedicated cluster
  - Creating a Vserver with Infinite Volume in a dedicated cluster
  - Creating an Infinite Volume using default settings
- Creating an Infinite Volume with a dedicated namespace aggregate
- Creating an Infinite Volume that supports data protection on a different platform
Converting to an Infinite Volume with storage classes
How client access works on Infinite Volumes
- Comparison of namespaces for Infinite Volumes and FlexVol volumes
- Where clients access Infinite Volumes
- Why an Infinite Volume's size appears smaller from a client
- How the mixed state of an Infinite Volume affects its availability
- How locks work on Infinite Volumes
Managing Infinite Volumes
- How operations run on Infinite Volumes
- Viewing information about events on Infinite Volume constituents
- Viewing constituents of an Infinite Volume
- Naming convention for constituents
- Restrictions on the private namespace of a Vserver with Infinite Volume
- Restriction on moving or copying Infinite Volumes
- Restriction on shrinking Infinite Volumes
- Deleting an Infinite Volume
Monitoring space usage in Infinite Volumes
- Commands for monitoring space usage in an Infinite Volume
- Monitoring space usage in Infinite Volumes with storage classes
- How you can determine and control a volume's space usage in the aggregate
  - What the volume footprint is
- How to determine space usage in an aggregate
- Methods to create space in an Infinite Volume or its aggregates
- How an Infinite Volume distributes data across its constituents
- Maximum number of files an Infinite Volume can store
- Monitoring the number of files in an Infinite Volume
Expanding Infinite Volumes
- How space is allocated when you expand an Infinite Volume
- Expanding an Infinite Volume by increasing its use of existing aggregates
- Expanding an Infinite Volume by adding disks to its existing aggregates
- Expanding an Infinite Volume by associating it with more aggregates on existing nodes
- Expanding an Infinite Volume by adding nodes
Expanding Infinite Volumes with storage classes
Troubleshooting issues with Infinite Volumes
- Completing an interrupted Infinite Volume creation
- Managing size-related error messages when you create or expand an Infinite Volume
- Troubleshooting a "footprint information" message when creating or expanding an Infinite Volume
- This command is not supported for Infinite Volumes that are managed by storage services
Unsupported Data ONTAP features in Infinite Volumes
- Unsupported space management capabilities for Infinite Volumes
Using deduplication and data compression to increase storage efficiency
How to set up efficiency operations
Configuring deduplication
- How deduplication works
- How deduplication works on Infinite Volumes
- What deduplication metadata is
- Guidelines for using deduplication
  - Performance considerations for deduplication
- Enabling deduplication on a volume
- Disabling deduplication on a volume
Configuring data compression
- How data compression works
- How compression works on Infinite Volumes
- How data compression detects incompressible data
- Enabling data compression on a volume
- Disabling data compression on a volume
How efficiency works on Infinite Volumes with storage classes
- Support for efficiency commands on Infinite Volumes with storage classes
Managing volume efficiency operations using policies
- Using volume efficiency priorities to prioritize efficiency operations
- Creating a volume efficiency policy to run efficiency operations
- Assigning a volume efficiency policy to a volume
- Modifying a volume efficiency policy
- Viewing a volume efficiency policy
- Deleting a volume efficiency policy
Managing volume efficiency operations using schedules
- Running efficiency operations manually
- Running efficiency operations depending on the amount of new data written
- Using checkpoints to resume efficiency operation
  - Resuming an efficiency operation using the checkpoint option
- Running efficiency operations manually on existing data
- Modifying scheduling of efficiency operations
Monitoring volume efficiency operations
- Viewing the status of efficiency operations on a FlexVol volume
- Viewing the status of efficiency operations on an Infinite Volume
- Viewing efficiency space savings on a FlexVol volume
- Viewing efficiency space savings on an Infinite Volume
- Viewing efficiency statistics of a FlexVol volume
Stopping volume efficiency operations
Information about removing space savings from a volume
Deduplication interoperability with Data ONTAP features
- How fractional reserve works with deduplication
- How Snapshot copies work with deduplication
- How volume SnapMirror works with deduplication
- How SnapRestore works with deduplication
- How OnCommand Unified Manager server works with deduplication
- How volume copy works with deduplication
- How deduplication works with data compression
- How FlexClone volumes work with deduplication
- How HA pairs work with deduplication
- How DataMotion for Volumes works with deduplication
- How SnapVault backup works with deduplication
Data compression interoperability with Data ONTAP features
- How fractional reserve works with data compression
- How Snapshot copies work with data compression
- How volume SnapMirror works with data compression
- How tape backup works with data compression
- How volume-based SnapRestore works with data compression
- How single file SnapRestore works with data compression
- How volume copy works with data compression
- How deduplication works with data compression
- How FlexClone volumes work with data compression
- How FlexClone files work with data compression
- How HA pairs work with data compression
- How Flash cache cards work with data compression
- How DataMotion for Volumes works with data compression
- How Flash Pools work with data compression
- How SnapVault backup works with data compression
Storage limits
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