Apple Xsan User Manual Page 123
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12 3
anity A relationship between a folder on an Xsan volume and one or more storage
pools that provide storage for the volume. The anity guarantees that les placed in
the folder are stored only on the associated storage pools. Storage pools can dier in
capacity and performance, and anities can be used to assure that data such as video,
which requires high transfer speed, is stored on the fastest storage devices.
anity tag In Xsan predened volume types, you assign LUNs to anity tags
instead of assigning the LUNs directly to storage pools. Then Xsan Admin can create
underlying storage pools with appropriate anities and the optimal numbers of LUNs
to achieve best performance.
allocation strategy In Xsan, the order in which data is written to the storage pools
that make up a volume. Applicable only if there’s more than one storage pool in
a volume, and only if the pools are of the same class. Can be ll, round robin, or
balance.
balance An Xsan storage pool allocation strategy. Before allocating space on a volume
consisting of more than one storage pool, Xsan checks available storage on all pools,
and then uses the one with the most free space.
block allocation size An Xsan volume property. The smallest number of bytes that can
be reserved on, written to, or read from an Xsan volume.
client A computer (or a user of the computer) that requests data or services from
another computer, or server.
controller In an Xsan storage area network, short for metadata controller. In RAID
systems, controller refers to hardware that manages the reading and writing of data.
By segmenting and writing or reading data on multiple drives simultaneously,
the RAID controller achieves fast and highly ecient storage and access. See also
metadata controller.
failover In Xsan, the automatic process by which a standby metadata controller
becomes the active metadata controller if the primary controller fails.
failover priority On a SAN with more than one controller, species which standby
controller to try rst during failover.
Glossary
Glossary
- Administrator Guide 1
- Contents 3
- 4 Contents 4
- Contents 5 5
- 6 Contents 6
- Contents 7 7
- About This Book 9
- What’s New in Xsan 2 10
- Version Compatibility 10
- Overview of Xsan 13
- Xsan Storage Area Networks 14
- Shared SAN Volumes 15
- Metadata Controllers 15
- Network Connections 15
- How Xsan Storage Is Organized 16
- Storage Pools 17
- Anities and Anity Tags 17
- Folders with Anities 18
- Security 19
- Expanding Storage 20
- Xsan Capacities 20
- Supported Computers 21
- Supported Storage Devices 22
- Fibre Channel Fabric 22
- Ethernet TCP/IP Network 23
- Directory Services 24
- Planning Your SAN 25
- Conguring RAID Systems 34
- Preparing LUNs 37
- Using Xsan Admin 39
- SAN and Volume Setup Summary 39
- Step 5: Set Up RAID Systems 42
- Step 8: Congure the SAN 44
- Step 9: Create a Volume 46
- Renaming a SAN 49
- Removing a SAN 49
- Managing Multiple SANs 50
- Setting Up Additional SANs 50
- Managing SAN Storage 51
- Adding a Volume to a SAN 53
- Adding LUNs to a Storage Pool 55
- Setting Up a Folder Anity 57
- Removing an Anity 58
- Enabling Extended Attributes 61
- Renaming a Volume 62
- -f option: 64
- Defragmenting a Volume 64
- command to check the 65
- Repairing a Volume 66
- Destroying a Volume 66
- Managing Clients and Users 67
- Adding an Xsan Serial Number 68
- Mounting a Volume on a Client 70
- Managing Users and Groups 71
- Adding SAN Users 72
- Deleting SAN Users 72
- Creating Groups 73
- Deleting Groups 73
- Changing Group Membership 73
- Unmount button 75
- Select the volume 75
- Select to view 75
- computers that have 75
- the volume mounted 75
- Removing a Client from a SAN 77
- About Xsan Quotas 80
- Checking User Quota Status 81
- Helping Users Check Quotas 83
- Connection 84
- Action menu 84
- Managing Metadata Controllers 86
- Adding a Metadata Controller 87
- $ sudo cvadmin -e select 89
- Monitoring Controller Status 92
- Monitoring SAN Status 93
- Checking Volume Status 94
- Monitoring RAID Devices 94
- Available space 95
- Graphing SAN Resource Usage 96
- Viewing Xsan Logs 98
- Checking Volume Clients 99
- Solving SAN Problems 100
- $ sudo cvadmin 101
- Interruption 103
- StorNext Clients 105
- Terminology 106
- Licensing 106
- Using the Command Line 108
- Notation Conventions 109
- Xsan Commands 110
- To enter interactive mode: 111
- ” below 116
- Examples 120
- Mounting an Xsan Volume 121
- Xsan Conguration Files 122
- Glossary 123
- 12 4 Glossary 124
- Glossary 12 5 125
- Index 12 7 127
- 12 8 Index 128
- Index 12 9 129
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