vSphere Storage - ESXi 5.1 - Documentation - VMware

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vSphere Storage Figure 22-1. Thick and thin virtual disks VM 1 40GB VM 2 THICK THIN 80GB 40GB 40GB datastore used capacity virtual disks 20GB 40GB 20GB provisioned capacity Create Thin Provisioned Virtual Disks When you need to save storage space, you can create a virtual disk in thin provisioned format. The thin provisioned virtual disk starts small and grows as more disk space is required. This procedure assumes that you are creating a typical or custom virtual machine using the New Virtual Machine wizard. Prerequisites You can create thin disks only on the datastores that support disk-level thin provisioning. Procedure u In the Create a Disk dialog box, select Thin Provision. A virtual disk in thin format is created. What to do next If you created a virtual disk in the thin format, you can later inflate it to its full size. About Virtual Disk Provisioning Policies When you perform certain virtual machine management operations, such as creating a virtual disk, cloning a virtual machine to a template, or migrating a virtual machine, you can specify a provisioning policy for the virtual disk file. NFS datastores with Hardware Acceleration and VMFS datastores support the following disk provisioning policies. On NFS datastores that do not support Hardware Acceleration, only thin format is available. 226 VMware, Inc.
You can use Storage vMotion or cross-host Storage vMotion to transform virtual disks from one format to another. Thick Provision Lazy Zeroed Thick Provision Eager Zeroed Creates a virtual disk in a default thick format. Space required for the virtual disk is allocated when the disk is created. Data remaining on the physical device is not erased during creation, but is zeroed out on demand at a later time on first write from the virtual machine. Virtual machines do not read stale data from the physical device. A type of thick virtual disk that supports clustering features such as Fault Tolerance. Space required for the virtual disk is allocated at creation time. In contrast to the thick provision lazy zeroed format, the data remaining on the physical device is zeroed out when the virtual disk is created. It might take longer to create virtual disks in this format than to create other types of disks. Thin Provision Use this format to save storage space. For the thin disk, you provision as much datastore space as the disk would require based on the value that you enter for the virtual disk size. However, the thin disk starts small and at first, uses only as much datastore space as the disk needs for its initial operations. If the thin disk needs more space later, it can grow to its maximum capacity and occupy the entire datastore space provisioned to it. Thin provisioning is the fastest method to create a virtual disk because it creates a disk with just the header information. It does not allocate or zero out storage blocks. Storage blocks are allocated and zeroed out when they are first accessed. NOTE If a virtual disk supports clustering solutions such as Fault Tolerance, do not make the disk thin. You can manually inflate the thin disk, so that it occupies the entire provisioned space. If physical storage space is exhausted and the thin provisioned disk cannot grow, the virtual machine becomes unusable. Create Thin Provisioned Virtual Disks in the vSphere Web Client To save storage space, you can create a virtual disk in thin provisioned format. The thin provisioned virtual disk starts small and grows as more disk space is required. You can create thin disks only on the datastores that support disk-level thin provisioning. This procedure assumes that you are creating a new virtual machine. For information, see the vSphere Virtual Machine Administration documentation. Procedure 1 Right-click any inventory object that is a valid parent object of a virtual machine, such as a datacenter, folder, cluster, resource pool, or host, and select New Virtual Machine. 2 Select Create a new virtual machine and click Next. 3 Follow the steps required to create a virtual machine. 4 On the Customize Hardware page, click the Virtual Hardware tab. 5 Click the New Hard Disk triangle to expand the hard disk options. 6 (Optional) Adjust the default disk size. With a thin virtual disk, the disk size value shows how much space is provisioned and guaranteed to the disk. At the beginning, the virtual disk might not use the entire provisioned space and the actual storage usage value could be less than the size of the virtual disk. 7 Select Thin Provision for Disk Provisioning. Chapter 22 Storage Thin Provisioning VMware, Inc. 227
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vSphere Storage ESXi 5.1 vCenter Se
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Contents About vSphere Storage 9 Up
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Configuring Discovery Addresses for
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22 Storage Thin Provisioning 225 St
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About vSphere Storage vSphere Stora
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Updated Information This vSphere St
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Introduction to Storage 1 This intr
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Networked Storage Networked storage
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Network-attached Storage (NAS) Stor
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Table 1-1. Storage Device Informati
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Table 1-2. Storage Adapter Informat
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Display Datastore Information in th
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Figure 1-6. Virtual machines access
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Overview of Using ESXi with a SAN 2
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ESXi Hosts and Multiple Storage Arr
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Not all applications need to be on
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n Overall impact on SAN environment
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Using ESXi with Fibre Channel SAN 3
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With ESXi hosts, use a single-initi
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Configuring Fibre Channel Storage 4
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2 Check that all SAN components mee
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3 Click VM Options. 4 Click the Fib
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Configuring Fibre Channel over 5 Et
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6 Select the network adapter (vmnic
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6 Click OK. The software FCoE adapt
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Modifying Fibre Channel Storage for
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n To use boot from SAN, make sure t
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3 Execute these commands for SPB to
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Booting ESXi from Fibre Channel SAN
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2 Configure the storage array. a Fr
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g Select 1. WWPN. (Boot this device
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Booting ESXi with Software FCoE 8 E
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Install and Boot ESXi from Software
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Best Practices for Fibre Channel 9
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Storage Array Performance Storage a
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Using ESXi with iSCSI SAN 10 You ca
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The 16-hexadecimal digits are text
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Discovery A discovery session is pa
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Configuring iSCSI Adapters and 11 S
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For active-passive storage arrays n
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Change Name and IP Address for Inde
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n Broadcom iSCSI adapters do not su
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The software iSCSI adapter configur
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Procedure 1 Browse to the host in t
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Figure 11-2. 1:1 adapter mapping on
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You created the virtual VMkernel ad
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5 Click Add and select a VMkernel a
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5 Create iSCSI VMkernel adapters fo
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Managing iSCSI Network Special cons
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Enable Jumbo Frames for Independent
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Procedure 1 Log in to the vSphere C
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Table 11-4. CHAP Security Level (Co
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2 Under Adapter Details, click the
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3 From the list of available target
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Table 11-5. Additional Parameters f
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Procedure u To list iSCSI sessions,
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Modifying iSCSI Storage Systems for
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n Certain EMC CLARiiON CX3 models m
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NetApp Storage Systems For NetApp s
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Booting from iSCSI SAN 13 When you
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4 Select the I/O port to configure.
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2 Change Boot Sequence in BIOS on p
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Isolated iSCSI and Management Netwo
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Best Practices for iSCSI Storage 14
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Because each application has differ
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Generally, applications or systems
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Managing Storage Devices 15 Manage
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Storage Refresh and Rescan Operatio
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Change the Number of Scanned LUNs B
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It is possible for a device to retu
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To avoid these problems, your host
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PDL Conditions and High Availabilit
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Solid State Disks Enablement 16 In
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4 Unclaim the device. u You can unc
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6 Check the device status by runnin
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Best Practices for SSD Devices Foll
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Working with Datastores 17 Datastor
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n Scalability improvements on stora
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n Creating a template n Deploying a
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In an L3 environment the following
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The datastore on the SCSI-based sto
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Procedure 1 Log in to the vSphere C
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When you perform datastore resignat
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2 Click the Configuration tab and c
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Option Description Use free space D
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3 In the Inventory panel, choose Da
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Turn off Storage Filters When you p
Page 175 and 176: Set Up Dynamic Disk Mirroring Typic
Page 177 and 178: 4 Click Next. 5 Select the device t
Page 179 and 180: Raw Device Mapping 18 Raw device ma
Page 181 and 182: Snapshots Makes it possible to use
Page 183 and 184: n You cannot convert larger than 2T
Page 185 and 186: 9 In the Ready to Complete New Virt
Page 187 and 188: Manage Paths for a Mapped LUN in th
Page 189 and 190: VMkernel and Storage 19 The VMkerne
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Page 193 and 194: Understanding Multipathing and 20 F
Page 195 and 196: Figure 20-2. Host-Based Path Failov
Page 197 and 198: Figure 20-4. Port Reassignment 10.0
Page 199 and 200: Figure 20-5. Pluggable Storage Arch
Page 201 and 202: 6 The SATP interprets the I/O comma
Page 203 and 204: 3 Click Devices under View. 4 Selec
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Page 209 and 210: Procedure 1 To define a new claim r
Page 211 and 212: Mask Paths You can prevent the host
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Page 219 and 220: Procedure u Run the esxcli --server
Page 221 and 222: 3 Load both claim rules by running
Page 223 and 224: Uninstall NAS Plug-Ins To uninstall
Page 225: Storage Thin Provisioning 22 With E
Page 229 and 230: 3 Click the Hardware tab and select
Page 231 and 232: Requirements To use the thin provis
Page 233 and 234: Procedure Chapter 22 Storage Thin P
Page 235 and 236: Using Storage Vendor Providers 23 W
Page 237 and 238: n Alarms indicate a change in stora
Page 239 and 240: 3 In the Storage Providers list, vi
Page 241 and 242: Virtual Machine Storage Profiles 24
Page 243 and 244: View Existing Storage Capabilities
Page 245 and 246: Assign User-Defined Storage Capabil
Page 247 and 248: Remove a Storage Capability in the
Page 249 and 250: Create a Virtual Machine Storage Pr
Page 251 and 252: Procedure 1 Open the Profiles tab o
Page 253 and 254: Monitor Storage Compliance for Virt
Page 255 and 256: Using vmkfstools 25 vmkfstools is o
Page 257 and 258: File System Options File system opt
Page 259 and 260: When upgrading the datastore, use t
Page 261 and 262: Renaming a Virtual Disk This option
Page 263 and 264: Listing Attributes of an RDM This o
Page 265 and 266: Index Symbols * next to path 201 A
Page 267 and 268: G GPT 18 H hardware acceleration ab
Page 269 and 270: limitations 42 requirements 41 O on
Page 271 and 272: EMC CLARiiON 52, 114 EMC Symmetrix
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vSphere Storage - ESXi 5.1 - Documentation - VMware

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