HP-UX Logical Volume Manager (LVM) (H6285S)

COURSE OVERVIEW

This course covers the procedures necessary for setting up and managing the HP-UX disk subsystem using Logical Volume Manager (LVM). You will also gain experience with MirrorDisk/UX using various recovery techniques to provide data redundancy and protection against possible disk failure. The course is 50 percent lecture and 50 percent hands-on labs using HP servers.

PREREQUISITES

• HP-UX system and network administration I (H3064S) and HP-UX System and Network Administration II (H3065S) or
• HP-UX for experienced UNIX system administrators (H5875S)

AUDIENCE

• Experienced HP-UX system administrators

COURSE OBJECTIVES

At the conclusion of this course, you will be able to:

• Configure and manage LVM disks, disk groups, and logical volumes
• Configure striped, mirrored, and distributed logical volumes
• Configure LVM for optimal performance
• Recover failed LVM disks and volumes

BENEFITS TO YOU

Gain the skills required to:

• Effectively manage LVM disks, disk groups, and volumes
• Mirror LVM data and boot disks to improve uptime and reliability
• Replace failed LVM data and boot disks
• Prepare you to attend HP Serviceguard I (H6487S) as HP-UX Logical Volume Manager (H6285S) is a critical prerequisite

NEXT STEPS

• HP Serviceguard I (H6487S)
• HP-UX Troubleshooting (H4264S)
• HP-UX Security (H3541S)

COURSE OUTLINE

Introduction to Disk Space Management and LVM

• Disk space management solutions
• Whole disk benefits and limitations
• LVM benefits and limitations
• LVM resources
• Disk space management solution comparison

Disk array & SAN concepts and addressing

• Disk array concepts
• LUN concepts
• RAID concepts
• RAID 0, RAID 1, RAID 1+0, and RAID 0+1 concepts
• RAID 3, RAID 5, and RAID 5DP concepts
• RAID levels and LVM
• SAN and multipathing concepts
• Hardware address concepts
• Legacy vs. Agile View hardware addresses
• Legacy parallel SCSI hardware addresses
• Legacy FC hardware addresses
• Legacy DSF names
• Viewing legacy hardware addresses and DSFs
• Agile View SCSI hardware addresses
• Agile View FC lunpath hardware addresses
• Agile View FC LUN hardware addresses
• Agile View persistent DSFs
• Viewing Agile View hardware addresses and DSFs
• Viewing an HBA’s lunpaths via Agile View
• Viewing a LUN’s WWID and LUN ID via Agile View
• Viewing a LUN’s WWID and lunpaths via Agile View
• Selecting a path load balancing policy
• Monitoring HBA, LUN, and lunpath usage
• Monitoring HB, LUN, and lunpath health
• Enabling and disabling LUNs and lunpaths

LVM concepts and structures

• LVM objects
• LVM physical volumes, volume groups, and logical volumes
• LVM DSF directories and DSFs
• LVM extents and extent sizes
• LVM extent allocation
• LVM PVRA, VGRA, and BBRA areas
• LVM kernel structures and volume group activation
• LVM activation quorum
• LVM running quorum
• LVMv1.0 and v2.x limits

Creating and Managing Volume Groups and Logical Volumes

• Identifying available disks
• Creating physical volumes
• Creating volume groups
• Creating logical volumes
• Viewing groups and volumes
• Extending, reducing, and removing volume groups
• Extending, reducing, and removing logical volumes
• Extending and reducing file systems
• Removing physical volumes
• Activating and deactivating volume groups
• LVM basic command summary

Configuring and Managing Mirrored Logical Volumes

• Mirroring concepts
• Installing MirrorDisk/UX
• Mirroring logical volumes
• Viewing logical volumes
• Unmirroring logical volumes
• Synchronizing mirrors
• Splitting and merging mirrors for on-host and off-host backups
• Configuring spare physical volumes

Configuring and managing mirroring policies

• Mirroring policy concepts
• Mirror scheduling policy concepts
• Choosing and configuring an appropriate mirror scheduling policy
• Mirror consistency recovery policy concepts
• Choosing and configuring an appropriate consistency recovery policy
• Mirror allocation policy concepts
• Choosing and configuring an appropriate mirror allocation policy
• Mirroring policy summary

Creating and Managing Striped and Distributed Logical Volumes

• Striped logical volumes
• Striped logical volume advantages and disadvantages
• Configuring non-mirrored striped logical volumes
• Striped versus distributed logical volumes
• Creating a non-mirrored distributed logical volume
• Creating a mirrored distributed logical volume
• Configuring /etc/lvmpvg for distributed logical volumes

Moving Data in an LVM Environment

• Why move extents within a volume group
• Moving and balancing physical extents with pvmove
• Moving and balancing logical volumes with lvmove
• Moving logical volumes and physical extents with vgmove

Exporting and Importing Volume Groups

• Volume group export/import concepts
• Structures affected by physical volume and volume group moves
• Volume group export/import commands
• Moving volume groups and physical volumes to a different server
• Moving a physical volume to a new address
• Renaming a volume group
• Importing volume groups after reinstalling
• Importing split mirrors for off-host processing
• Exporting a corrupted volume group
• Importing volume groups in Serviceguard clusters

Monitoring and Tuning LVM Performance

• LVM performance considerations
• Balancing workloads: concepts and symptoms
• Balancing workloads: overriding the default allocation policy
• Balancing workloads: striping logical volumes
• Balancing workloads: mirroring logical volumes
• Minimizing head movement: concepts, symptoms, and commands
• Avoiding fragmentation: concepts, symptoms, and commands
• Minimizing MWC/MCR overhead: concepts, symptoms, and commands
• Buying faster disks and interfaces
• Updating the Operating System
• Other performance factors

Recovering LVM Disks and Structures

• LVM structure concepts
• Recovering lost or damaged LVM structures
• Recovering missing device files
• Rebuilding a corrupt /etc/lvmtab file
• Refreshing outdated kernel structures
• Failed disks: symptoms experienced by users
• Failed disks: symptoms reported in syslog.log
• Failed disks: symptoms reported by EMS
• Failed disks: symptoms reported in vgdisplay
• Failed disks: symptoms reported in ioscan
• Activating a volume group containing failed disks
• Gathering information about failed disks
• Restoring a power-failed disk
• Replacing a failed disk
• Replacing a disk with and without LVM OLR
• Replacing LVM headers
• Replacing unmirrored logical volumes
• Replacing mirrored logical volumes
• Removing failed physical volumes
• Removing corrupted volume groups
• Proactively checking PVRA/VGRA health
• Preparing for disk recovery

Managing volume group attributes

• LVMv1 attribute concepts & limits
• LVMv2 attribute concepts & limits
• Managing LVMv1 attributes with vgmodify
• Managing LVMv2 attributes with vgmodify
• Expanding & contracting LUNs offline with vgmodify
• Expanding & contracting LUNs online with vgmodify
• Upgrading and downgrading volume grousp with vgversion

Configuring and Managing LVM Boot Disks on PA-RISC Servers

• PA-RISC boot process structures, concepts, and restrictions
• Booting without LVM quorum
• Booting to LVM maintenance mode
• PA-RISC boot disk mirroring concepts
• Mirroring an Integrity boot disk
• Replacing a failed Integrity boot mirror
• Creating and updating a DRD clone
• Creating a PA-RISC make_*_recovery archive
• Resizing PA-RISC boot disk logical volumes

Configuring and Managing LVM Boot Disks on Integrity Servers

• Integrity boot process structures, concepts, and restrictions
• Booting without LVM quorum
• Booting to LVM maintenance mode
• Integrity boot disk mirroring concepts
• Mirroring an Integrity boot disk
• Replacing a failed Integrity boot mirror
• Creating and updating a DRD clone
• Creating an Integrity make_*_recovery archive
• Resizing Integrity boot disk logical volumes

Self study appendix: Configuring and managing PV links

• PV link overview
• Configuring PV links
• Viewing, adding, and removing PV links
• PV link switchover
• PV link switchback
• Configuring autoswitch behavior
• Switching links manually
• Optimizing PV links
• Configuring PV links with SecurePath

Self study appendix: Quiescing volume groups for use in snapshot LUNs

• Snapshot concepts
• Creating a snapshot
• Recognizing a snapshot
• Resolving duplicate VGIDs
• Importing a snapshot volume group
• Exporting a snapshot volume group

Self study appendix: Creating and managing DRD clones

• DRD concepts
• Using DRD clones to minimize planned and unplanned downtime
• Installing DRD
• Using the DRD command
• Creating a DRD clone
• Synchronizing a DRD clone
• Verifying a DRD clone’s status
• Managing software via DRD-safe commands
• Managing kernel tunables via DRD safe commands
• Accessing images via other commands
• Activating an inactive DRD image

Self study appendix: Creating and managing logical volume snapshots

• Snapshot concepts
• Snapshot data sharing concepts
• Data unsharing unit concepts
• Fully allocated snapshot concepts
• Space efficient snapshot concepts
• Creating a volume group to accommodate snapshot volumes
• Creating a fully allocated snapshot
• Creating a space efficient snapshot
• Removing snapshots and volumes
• Snapshot Limitations
• Snapshot volumes vs. split logical volume mirrors

For more information about HP training programs in Ukraine visit the web site at http://www8.hp.com/ua/ru/training/index.html

For whom it is intended:

• System administrator