Chapter 1 Getting Started with Solaris
Volume Manager
The Solaris Volume Manager Administration Guide describes how to set up and maintain
systems using Solaris Volume Manager to manage storage for high availability, flexibility,
and reliability.
This chapter serves as a high-level guide to find information for certain Solaris Volume Manager tasks,
such as setting up storage capacity. This chapter does not address all the
tasks that you will need to use Solaris Volume Manager. Instead, it provides an easy
way to find procedures describing how to perform common tasks associated with
the following Solaris Volume Manager concepts:
-
What's New
-
Storage Capacity
-
Availability
-
I/O Performance
-
Administration
-
Troubleshooting
Caution –
If you do not use Solaris Volume Manager correctly, you can destroy
data. Solaris Volume Manager provides a powerful way to reliably manage your disks
and data on them. However, you should always maintain backups of your data,
particularly before you modify an active Solaris Volume Manager configuration.
Finding Solaris Volume Manager Information and Tasks
The following sections provide roadmaps to help you locate the Solaris Volume Manager information
you need.
Solaris Volume Manager Roadmap—What's New
Table 1–1 Solaris Volume Manager Roadmap—What's
New
Solaris Volume Manager Roadmap—Storage Capacity
Table 1–2 Solaris Volume Manager Roadmap—Storage
Capacity
|
Task
|
Description
|
For Instructions
|
|
Set up storage
|
Create storage that spans slices by creating a RAID 0 or a RAID 5 volume.
The RAID 0 or RAID 5 volume can then be used for a file system or any application,
such as a database that accesses the raw device
|
How to Create a RAID 0 (Stripe) Volume
How to Create a RAID 0 (Concatenation) Volume
How to Create a RAID 1 Volume From Unused
Slices
How to Create a RAID 1 Volume From a File
System
How to Create a RAID 5 Volume
|
|
Expand an existing file system
|
Increase the capacity of an existing file system by creating a RAID
0 (concatenation) volume, then adding additional slices.
|
How to Expand Storage Space for Existing
Data
|
|
Expand an existing RAID 0 (concatenation or stripe) volume
|
Expand an existing RAID 0 volume by concatenating additional slices
to it.
|
How to Expand an Existing RAID 0
Volume
|
|
Expand a RAID 5 volume
|
Expand the capacity of a RAID 5 volume by concatenating additional slices
to it.
|
How to Expand a RAID 5 Volume
|
|
Increase the size of a UFS file system on a expanded volume
|
Grow a file system by using the growfs command to
expand the size of a UFS while it is mounted and without disrupting access
to the data.
|
How to Expand a File System
|
|
Subdivide slices or logical volumes into smaller partitions, breaking
the 8 slice hard partition limit
|
Subdivide logical volumes or slices by using soft partitions.
|
How to
Create a Soft Partition
|
|
Create a file system
|
Create a file system on a RAID 0 (stripe or concatenation), RAID 1 (mirror),
RAID 5, or transactional volume, or on a soft partition.
|
Chapter 16, Creating UFS, TMPFS, and LOFS File Systems (Tasks), in System Administration Guide: Devices and File Systems
|
Solaris Volume Manager Roadmap—Availability
Table 1–3 Solaris Volume Manager Roadmap—Availablity
|
Task
|
Description
|
For Instructions
|
|
Maximize data availability
|
Use Solaris Volume Manager's mirroring feature to maintain multiple copies of
your data. You can create a RAID 1 volume from unused slices in preparation
for data, or you can mirror an existing file system, including root (/) and /usr.
|
How to Create a RAID 1 Volume From Unused
Slices
How to Create a RAID 1 Volume From a File
System
|
|
Add data availability with minimum hardware cost
|
Increase data availability with minimum of hardware by using Solaris Volume Manager's
RAID 5 volumes.
|
How to Create a RAID 5 Volume
|
|
Increase data availability for an existing RAID 1 or RAID 5 volume
|
Increase data availability for a RAID 1 or a RAID 5 volume, by creating
a hot spare pool then associate it with a mirror's submirrors, or a RAID 5
volume.
|
Creating
a Hot Spare Pool
Associating
a Hot Spare Pool With Volumes
|
|
Increase file system availability after reboot
|
Increase overall file system availability after reboot, by adding UFS
logging (transactional volume) to the system. Logging a file system reduces
the amount of time that the fsck command has to run when
the system reboots.
|
About File System Logging
|
Solaris Volume Manager Roadmap—I/O Performance
Table 1–4 Solaris Volume Manager Roadmap—I/O
Performance
|
Task
|
Description
|
For Instructions
|
|
Tune RAID 1 volume read and write policies
|
Specify the read and write policies for a RAID 1 volume to improve performance
for a given configuration.
|
RAID 1 Volume Read and Write Policies
How to Change RAID 1 Volume Options
|
|
Optimize device performance
|
Creating RAID 0 (stripe) volumes optimizes performance of devices that
make up the stripe. The interlace value can be optimized for random or sequential
access.
|
Creating RAID 0 (Stripe) Volumes
|
|
Maintain device performance within a RAID 0 (stripe)
|
Expands stripe or concatenation that has run out of space by concatenating
a new component to it. A concatenation of stripes is better for performance
than a concatenation of slices.
|
Expanding Storage Space
|
Solaris Volume Manager Roadmap—Administration
Table 1–5 Solaris Volume Manager Roadmap—Administration
|
Task
|
Description
|
For Instructions
|
|
Graphically administer your volume management configuration
|
Use the SolarisTM Management Console
to administer your volume management configuration.
|
Online help from within Solaris Volume Manager (Enhanced Storage) node of the Solaris Management Console application
|
|
Graphically administer slices and file systems
|
Use the Solaris Management Console graphical user interface to administer your disks and
file systems, performing such tasks as partitioning disks and constructing
UFS file systems.
|
Online help from within the Solaris Management Console application
|
|
Optimize Solaris Volume Manager
|
Solaris Volume Manager performance is dependent on a well-designed configuration.
Once created, the configuration needs monitoring and tuning.
|
Solaris Volume Manager Configuration Guidelines
Working with Configuration Files
|
|
Plan for future expansion
|
Because file systems tend to run out of space, you can plan for future
growth by putting a file system into a concatenation.
|
Creating RAID 0 (Concatenation) Volumes
Expanding Storage Space
|
Solaris Volume Manager Roadmap—Troubleshooting
Table 1–6 Solaris Volume Manager Roadmap—Troubleshooting
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