vSphere Storage - ESXi 5.1 - Documentation - VMware

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vSphere Storage Configuring Advanced Parameters for iSCSI You might need to configure additional parameters for your iSCSI initiators. For example, some iSCSI storage systems require ARP (Address Resolution Protocol) redirection to move iSCSI traffic dynamically from one port to another. In this case, you must activate ARP redirection on your host. The following table lists advanced iSCSI parameters that you can configure using the vSphere Client and the vSphere Web Client. In addition, you can use the vSphere CLI commands to configure some of the advanced parameters. For information, see the Getting Started with vSphere Command-Line Interfaces documentation. IMPORTANT Do not make any changes to the advanced iSCSI settings unless you are directed by VMware support or Storage Vendors. Table 11-5. Additional Parameters for iSCSI Initiators Advanced Parameter Description Configurable On Header Digest Increases data integrity. When header digest is enabled, the system performs a checksum over each iSCSI Protocol Data Unit’s (PDU’s) header part and verifies using the CRC32C algorithm. Data Digest Increases data integrity. When data digest is enabled, the system performs a checksum over each PDU's data part and verifies using the CRC32C algorithm. Maximum Outstanding R2T NOTE Systems that use Intel Nehalem processors offload the iSCSI digest calculations for software iSCSI, thus reducing the impact on performance. Defines the R2T (Ready to Transfer) PDUs that can be in transition before an acknowledge PDU is received. First Burst Length Specifies the maximum amount of unsolicited data an iSCSI initiator can send to the target during the execution of a single SCSI command, in bytes. Maximum Burst Length Maximum Receive Data Segment Length Session Recovery Timeout Maximum SCSI data payload in a Data-In or a solicited Data-Out iSCSI sequence, in bytes. Maximum data segment length, in bytes, that can be received in an iSCSI PDU. Specifies the amount of time, in seconds, that can lapse while a session recovery is performed. If the timeout exceeds its limit, the iSCSI initiator terminates the session. No-Op Interval Specifies the time interval, in seconds, between NOP-Out requests sent from your iSCSI initiator to an iSCSI target. The NOP-Out requests serve as the ping mechanism to verify that a connection between the iSCSI initiator and the iSCSI target is active. No-Op Timeout Specifies the amount of time, in seconds, that can lapse before your host receives a NOP-In message. The message is sent by the iSCSI target in response to the NOP-Out request. When the no-op timeout limit is exceeded, the initiator terminates the current session and starts a new one. Software iSCSI Dependent Hardware iSCSI Software iSCSI Dependent Hardware iSCSI Software iSCSI Dependent Hardware iSCSI Software iSCSI Dependent Hardware iSCSI Software iSCSI Dependent Hardware iSCSI Software iSCSI Dependent Hardware iSCSI Software iSCSI Dependent Hardware iSCSI Software iSCSI Dependent Hardware iSCSI Software iSCSI Dependent Hardware iSCSI 108 VMware, Inc.
Table 11-5. Additional Parameters for iSCSI Initiators (Continued) Advanced Parameter Description Configurable On ARP Redirect Allows storage systems to move iSCSI traffic dynamically from one port to another. ARP is required by storage systems that do arraybased failover. Software iSCSI Dependent Hardware iSCSI Independent Hardware iSCSI Delayed ACK Allows systems to delay acknowledgment of received data packets. Software iSCSI Configure Advanced Parameters for iSCSI in the vSphere Client Dependent Hardware iSCSI The advanced iSCSI settings control such parameters as header and data digest, ARP redirection, delayed ACK, and so on. Generally, you do not need to change these settings because your host works with the assigned predefined values. CAUTION Do not make any changes to the advanced iSCSI settings unless you are working with the VMware support team or otherwise have thorough information about the values to provide for the settings. Required privilege: Host.Configuration.Storage Partition Configuration Procedure 1 Access the iSCSI Initiator Properties dialog box. 2 To configure advanced parameters at the initiator level, on the General tab, click Advanced. Proceed to Step 4. 3 Configure advanced parameters at the target level. At the target level, advanced parameters can be configured only for software and dependent hardware iSCSI adapters. a Select either the Dynamic Discovery tab or Static Discovery tab. b From the list of available targets, select a target to configure and click Settings > Advanced. 4 Enter any required values for the advanced parameters you want to modify and click OK to save your changes. Configure Advanced Parameters for iSCSI in the vSphere Web Client The advanced iSCSI settings control such parameters as header and data digest, ARP redirection, delayed ACK, and so on. CAUTION Do not make any changes to the advanced iSCSI settings unless you are working with the VMware support team or otherwise have thorough information about the values to provide for the settings. Prerequisites Required privilege: Host.Configuration.Storage Partition Configuration Procedure 1 Browse to the host in the vSphere Web Client navigator. 2 Click the Manage tab, and click Storage. 3 Click Storage Adapters, and select the adapter (vmhba#) to configure. Chapter 11 Configuring iSCSI Adapters and Storage VMware, Inc. 109
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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
Page 57 and 58: Booting ESXi from Fibre Channel SAN
Page 59 and 60: 2 Configure the storage array. a Fr
Page 61 and 62: g Select 1. WWPN. (Boot this device
Page 63 and 64: Booting ESXi with Software FCoE 8 E
Page 65 and 66: Install and Boot ESXi from Software
Page 67 and 68: Best Practices for Fibre Channel 9
Page 69 and 70: Storage Array Performance Storage a
Page 71 and 72: Using ESXi with iSCSI SAN 10 You ca
Page 73 and 74: The 16-hexadecimal digits are text
Page 75 and 76: Discovery A discovery session is pa
Page 77 and 78: Configuring iSCSI Adapters and 11 S
Page 79 and 80: For active-passive storage arrays n
Page 81 and 82: Change Name and IP Address for Inde
Page 83 and 84: n Broadcom iSCSI adapters do not su
Page 85 and 86: The software iSCSI adapter configur
Page 87 and 88: Procedure 1 Browse to the host in t
Page 89 and 90: Figure 11-2. 1:1 adapter mapping on
Page 91 and 92: You created the virtual VMkernel ad
Page 93 and 94: 5 Click Add and select a VMkernel a
Page 95 and 96: 5 Create iSCSI VMkernel adapters fo
Page 97 and 98: Managing iSCSI Network Special cons
Page 99 and 100: Enable Jumbo Frames for Independent
Page 101 and 102: Procedure 1 Log in to the vSphere C
Page 103 and 104: Table 11-4. CHAP Security Level (Co
Page 105 and 106: 2 Under Adapter Details, click the
Page 107: 3 From the list of available target
Page 111 and 112: Procedure u To list iSCSI sessions,
Page 113 and 114: Modifying iSCSI Storage Systems for
Page 115 and 116: n Certain EMC CLARiiON CX3 models m
Page 117 and 118: NetApp Storage Systems For NetApp s
Page 119 and 120: Booting from iSCSI SAN 13 When you
Page 121 and 122: 4 Select the I/O port to configure.
Page 123 and 124: 2 Change Boot Sequence in BIOS on p
Page 125 and 126: Isolated iSCSI and Management Netwo
Page 127 and 128: Best Practices for iSCSI Storage 14
Page 129 and 130: Because each application has differ
Page 131 and 132: Generally, applications or systems
Page 133 and 134: Managing Storage Devices 15 Manage
Page 135 and 136: Storage Refresh and Rescan Operatio
Page 137 and 138: Change the Number of Scanned LUNs B
Page 139 and 140: It is possible for a device to retu
Page 141 and 142: To avoid these problems, your host
Page 143 and 144: PDL Conditions and High Availabilit
Page 145 and 146: Solid State Disks Enablement 16 In
Page 147 and 148: 4 Unclaim the device. u You can unc
Page 149 and 150: 6 Check the device status by runnin
Page 151 and 152: Best Practices for SSD Devices Foll
Page 153 and 154: Working with Datastores 17 Datastor
Page 155 and 156: n Scalability improvements on stora
Page 157 and 158: 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
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Set Up Dynamic Disk Mirroring Typic
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4 Click Next. 5 Select the device t
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Raw Device Mapping 18 Raw device ma
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Snapshots Makes it possible to use
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n You cannot convert larger than 2T
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9 In the Ready to Complete New Virt
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Manage Paths for a Mapped LUN in th
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VMkernel and Storage 19 The VMkerne
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Chapter 19 VMkernel and Storage n A
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Understanding Multipathing and 20 F
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Figure 20-2. Host-Based Path Failov
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Figure 20-4. Port Reassignment 10.0
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Figure 20-5. Pluggable Storage Arch
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6 The SATP interprets the I/O comma
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3 Click Devices under View. 4 Selec
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2 In the Paths panel, right-click t
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This example indicates the followin
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Procedure 1 To define a new claim r
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Mask Paths You can prevent the host
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Procedure 1 To add a claim rule for
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Storage Hardware Acceleration 21 Th
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On your host, the hardware accelera
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Procedure u Run the esxcli --server
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3 Load both claim rules by running
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Uninstall NAS Plug-Ins To uninstall
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Storage Thin Provisioning 22 With E
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You can use Storage vMotion or cros
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3 Click the Hardware tab and select
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Requirements To use the thin provis
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Procedure Chapter 22 Storage Thin P
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Using Storage Vendor Providers 23 W
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n Alarms indicate a change in stora
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3 In the Storage Providers list, vi
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Virtual Machine Storage Profiles 24
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View Existing Storage Capabilities
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Assign User-Defined Storage Capabil
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Remove a Storage Capability in the
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Create a Virtual Machine Storage Pr
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Procedure 1 Open the Profiles tab o
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Monitor Storage Compliance for Virt
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Using vmkfstools 25 vmkfstools is o
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File System Options File system opt
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When upgrading the datastore, use t
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Renaming a Virtual Disk This option
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Listing Attributes of an RDM This o
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Index Symbols * next to path 201 A
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G GPT 18 H hardware acceleration ab
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limitations 42 requirements 41 O on
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EMC CLARiiON 52, 114 EMC Symmetrix
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vSphere Storage - ESXi 5.1 - Documentation - VMware

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