6.5.1
Table Of Contents
- vSphere Storage
- Contents
- About vSphere Storage
- Updated Information
- Introduction to Storage
- Getting Started with a Traditional Storage Model
- Overview of Using ESXi with a SAN
- Using ESXi with Fibre Channel SAN
- Configuring Fibre Channel Storage
- Configuring Fibre Channel over Ethernet
- Booting ESXi from Fibre Channel SAN
- Booting ESXi with Software FCoE
- Best Practices for Fibre Channel Storage
- Using ESXi with iSCSI SAN
- Configuring iSCSI Adapters and Storage
- ESXi iSCSI SAN Requirements
- ESXi iSCSI SAN Restrictions
- Setting LUN Allocations for iSCSI
- Network Configuration and Authentication
- Set Up Independent Hardware iSCSI Adapters
- About Dependent Hardware iSCSI Adapters
- About the Software iSCSI Adapter
- Modify General Properties for iSCSI Adapters
- Setting Up iSCSI Network
- Using Jumbo Frames with iSCSI
- Configuring Discovery Addresses for iSCSI Adapters
- Configuring CHAP Parameters for iSCSI Adapters
- Configuring Advanced Parameters for iSCSI
- iSCSI Session Management
- Booting from iSCSI SAN
- Best Practices for iSCSI Storage
- Managing Storage Devices
- Storage Device Characteristics
- Understanding Storage Device Naming
- Storage Rescan Operations
- Identifying Device Connectivity Problems
- Edit Configuration File Parameters
- Enable or Disable the Locator LED on Storage Devices
- Erase Storage Devices
- Working with Flash Devices
- About VMware vSphere Flash Read Cache
- Working with Datastores
- Types of Datastores
- Understanding VMFS Datastores
- Understanding Network File System Datastores
- Creating Datastores
- Managing Duplicate VMFS Datastores
- Increasing VMFS Datastore Capacity
- Administrative Operations for Datastores
- Set Up Dynamic Disk Mirroring
- Collecting Diagnostic Information for ESXi Hosts on a Storage Device
- Checking Metadata Consistency with VOMA
- Configuring VMFS Pointer Block Cache
- Understanding Multipathing and Failover
- Raw Device Mapping
- Software-Defined Storage and Storage Policy Based Management
- About Storage Policy Based Management
- Virtual Machine Storage Policies
- Working with Virtual Machine Storage Policies
- Populating the VM Storage Policies Interface
- Default Storage Policies
- Creating and Managing VM Storage Policies
- Storage Policies and Virtual Machines
- Assign Storage Policies to Virtual Machines
- Change Storage Policy Assignment for Virtual Machine Files and Disks
- Monitor Storage Compliance for Virtual Machines
- Check Compliance for a VM Storage Policy
- Find Compatible Storage Resource for Noncompliant Virtual Machine
- Reapply Virtual Machine Storage Policy
- Using Storage Providers
- Working with Virtual Volumes
- About Virtual Volumes
- Virtual Volumes Concepts
- Virtual Volumes and Storage Protocols
- Virtual Volumes Architecture
- Virtual Volumes and VMware Certificate Authority
- Snapshots and Virtual Volumes
- Before You Enable Virtual Volumes
- Configure Virtual Volumes
- Provision Virtual Machines on Virtual Volumes Datastores
- Virtual Volumes and Replication
- Best Practices for Working with vSphere Virtual Volumes
- Filtering Virtual Machine I/O
- Storage Hardware Acceleration
- Hardware Acceleration Benefits
- Hardware Acceleration Requirements
- Hardware Acceleration Support Status
- Hardware Acceleration for Block Storage Devices
- Hardware Acceleration on NAS Devices
- Hardware Acceleration Considerations
- Thin Provisioning and Space Reclamation
- Using vmkfstools
- vmkfstools Command Syntax
- The vmkfstools Command Options
- -v Suboption
- File System Options
- Virtual Disk Options
- Supported Disk Formats
- Creating a Virtual Disk
- Initializing a Virtual Disk
- Inflating a Thin Virtual Disk
- Converting a Zeroedthick Virtual Disk to an Eagerzeroedthick Disk
- Removing Zeroed Blocks
- Deleting a Virtual Disk
- Renaming a Virtual Disk
- Cloning or Converting a Virtual Disk or RDM
- Extending a Virtual Disk
- Upgrading Virtual Disks
- Creating a Virtual Compatibility Mode Raw Device Mapping
- Creating a Physical Compatibility Mode Raw Device Mapping
- Listing Attributes of an RDM
- Displaying Virtual Disk Geometry
- Checking and Repairing Virtual Disks
- Checking Disk Chain for Consistency
- Storage Device Options
You might want more, smaller LUNs for the following reasons:
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Less wasted storage space.
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Different applications might need different RAID characteristics.
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More flexibility, as the multipathing policy and disk shares are set per LUN.
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Use of Microsoft Cluster Service requires that each cluster disk resource is in its own LUN.
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Better performance because there is less contention for a single volume.
When the storage characterization for a virtual machine is unavailable, it might not be easy to determine
the number and size of LUNs to provision. You can experiment using either a predictive or adaptive
scheme.
Use the Predictive Scheme to Make LUN Decisions
When setting up storage for ESXi systems, before creating VMFS datastores, you must decide on the
size and number of LUNs to provision. You can experiment using the predictive scheme.
Procedure
1 Provision several LUNs with different storage characteristics.
2 Create a VMFS datastore on each LUN, labeling each datastore according to its characteristics.
3 Create virtual disks to contain the data for virtual machine applications in the VMFS datastores
created on LUNs with the appropriate RAID level for the applications' requirements.
4 Use disk shares to distinguish high-priority from low-priority virtual machines.
Note Disk shares are relevant only within a given host. The shares assigned to virtual machines on
one host have no effect on virtual machines on other hosts.
5 Run the applications to determine whether virtual machine performance is acceptable.
Use the Adaptive Scheme to Make LUN Decisions
When setting up storage for ESXi hosts, before creating VMFS datastores, you must decide on the
number and size of LUNS to provision. You can experiment using the adaptive scheme.
Procedure
1 Provision a large LUN (RAID 1+0 or RAID 5), with write caching enabled.
2 Create a VMFS on that LUN.
3 Create four or five virtual disks on the VMFS.
4 Run the applications to determine whether disk performance is acceptable.
If performance is acceptable, you can place additional virtual disks on the VMFS. If performance is not
acceptable, create a new, large LUN, possibly with a different RAID level, and repeat the process. Use
migration so that you do not lose virtual machines data when you recreate the LUN.
vSphere Storage
VMware, Inc. 33