Vxvm
This document was uploaded by user and they confirmed that they have the permission to share it. If you are author or own the copyright of this book, please report to us by using this DMCA report form. Report DMCA
Overview
Download & View Vxvm as PDF for free.
More details
- Words: 2,131
- Pages: 17
http://sfdoccentral.symantec.com/sf/5.0/aix/html/vxvm_admin/vxvm_admin_aixTOC.html Chapter 1 Understanding Veritas Volume Manager About Veritas Volume Manager VxVM and the operating system How data is stored How VxVM handles storage management Physical objects Virtual objects Volume layouts in VxVM Implementation of non-layered volumes Implementation of layered volumes Layout methods Concatenation and spanning Striping (RAID-0) Mirroring (RAID-1) Striping plus mirroring (mirrored-stripe or RAID-0+1) Mirroring plus striping (striped-mirror, RAID-1+0 or RAID-10) RAID-5 (striping with parity) Layered volumes Online relayout How online relayout works Limitations of online relayout Transformation characteristics Transformations and volume length Volume resynchronization Dirty flags Resynchronization process Dirty region logging
Dirty region logs Log subdisks and plexes Sequential DRL SmartSync recovery accelerator Volume snapshots Comparison of snapshot features FastResync FastResync enhancements Non-persistent FastResync Persistent FastResync DCO volume versioning FastResync limitations Hot-relocation Volume sets Chapter 2 Administering disks About disk management Disk devices Disk device naming in VxVM Private and public disk regions Discovering and configuring newly added disk devices Partial device discovery Discovering disks and dynamically adding disk arrays Third-party driver coexistence How to administer the Device Discovery Layer Disks under VxVM control Discovering the association between enclosure-based disk names and OS-based disk names Disk installation and formatting Displaying or changing default disk layout attributes
Adding a disk to VxVM Disk reinitialization Using vxdiskadd to put a disk under VxVM control Dynamic LUN expansion Extended Copy Service Enabling a disk for Extended Copy Service operation Removing disks Removing a disk with subdisks Removing a disk with no subdisks Removing a disk from VxVM control Removing and replacing disks Replacing a failed or removed disk Enabling a disk Taking a disk offline Renaming a disk Reserving disks Displaying disk information Displaying disk information with vxdiskadm Chapter 3 Administering Dynamic Multipathing How DMP works How DMP monitors I/O on paths Load balancing Using DMP with LVM boot disks Disabling MPIO DMP in a clustered environment Disabling multipathing and making devices invisible to VxVM Enabling multipathing and making devices visible to VxVM Enabling and disabling I/O for controllers and storage processors
Displaying DMP database information Displaying the paths to a disk Administering DMP using vxdmpadm Retrieving information about a DMP node Displaying the members of a LUN group Displaying paths controlled by a DMP node, controller or array port Displaying information about controllers Displaying information about enclosures Displaying information about array ports Displaying information about TPD-controlled devices Gathering and displaying I/O statistics Setting the attributes of the paths to an enclosure Displaying the I/O policy Specifying the I/O policy Disabling I/O for paths, controllers or array ports Enabling I/O for paths, controllers or array ports Upgrading disk controller firmware Renaming an enclosure Configuring the response to I/O failures Configuring the I/O throttling mechanism Displaying recovery option values Configuring DMP path restoration policies Stopping the DMP path restoration thread Displaying the status of the DMP path restoration thread Displaying information about the DMP error-handling thread Configuring array policy modules Chapter 4 Creating and administering disk groups About disk groups
Specification of disk groups to commands System-wide reserved disk groups Rules for determining the default disk group Displaying disk group information Displaying free space in a disk group Creating a disk group Adding a disk to a disk group Removing a disk from a disk group Deporting a disk group Importing a disk group Handling disks with duplicated identifiers Writing a new UDID to a disk Importing a disk group containing cloned disks Sample cases of operations on cloned disks Renaming a disk group Moving disks between disk groups Moving disk groups between systems Handling errors when importing disks Reserving minor numbers for disk groups Compatibility of disk groups between platforms Handling conflicting configuration copies Example of a serial split brain condition in a cluster Correcting conflicting configuration information Reorganizing the contents of disk groups Limitations of disk group split and join Listing objects potentially affected by a move Moving objects between disk groups Splitting disk groups
Joining disk groups Disabling a disk group Destroying a disk group Recovering a destroyed disk group Upgrading a disk group Managing the configuration daemon in VxVM Backing up and restoring disk group configuration data Using vxnotify to monitor configuration changes Chapter 5 Creating and administering subdisks About subdisks Creating subdisks Displaying subdisk information Moving subdisks Splitting subdisks Joining subdisks Associating subdisks with plexes Associating log subdisks Dissociating subdisks from plexes Removing subdisks Changing subdisk attributes Chapter 6 Creating and administering plexes About plexes Creating plexes Creating a striped plex Displaying plex information Plex states Plex condition flags Plex kernel states
Attaching and associating plexes Taking plexes offline Detaching plexes Reattaching plexes Moving plexes Copying plexes Dissociating and removing plexes Changing plex attributes Chapter 7 Creating volumes About volume creation Types of volume layouts Supported volume logs and maps Creating a volume Advanced approach Assisted approach Using vxassist Setting default values for vxassist Discovering the maximum size of a volume Disk group alignment constraints on volumes Creating a volume on any disk Creating a volume on specific disks Specifying ordered allocation of storage to volumes Creating a mirrored volume Creating a mirrored-concatenated volume Creating a concatenated-mirror volume Creating a volume with a version 0 DCO volume Creating a volume with a version 20 DCO volume Creating a volume with dirty region logging enabled
Creating a striped volume Creating a mirrored-stripe volume Creating a striped-mirror volume Mirroring across targets, controllers or enclosures Creating a RAID-5 volume Creating tagged volumes Creating a volume using vxmake Creating a volume using a vxmake description file Initializing and starting a volume Initializing and starting a volume created using vxmake Accessing a volume Chapter 8 Administering volumes About volume administration Displaying volume information Volume states Volume kernel states Monitoring and controlling tasks Specifying task tags Managing tasks with vxtask Stopping a volume Putting a volume in maintenance mode Starting a volume Adding a mirror to a volume Mirroring all volumes Mirroring volumes on a VM disk Removing a mirror Adding logs and maps to volumes Preparing a volume for DRL and instant snapshots
Specifying storage for version 20 DCO plexes Using a DCO and DCO volume with a RAID-5 volume Determining the DCO version number Determining if DRL is enabled on a volume Determining if DRL logging is active on a volume Disabling and re-enabling DRL Removing support for DRL and instant snapshots from a volume Upgrading existing volumes to use version 20 DCOs Adding traditional DRL logging to a mirrored volume Removing a traditional DRL log Adding a RAID-5 log Adding a RAID-5 log using vxplex Removing a RAID-5 log Resizing a volume Resizing volumes using vxresize Resizing volumes using vxassist Resizing volumes using vxvol Setting tags on volumes Changing the read policy for mirrored volumes Removing a volume Moving volumes from a VM disk Enabling FastResync on a volume Checking whether FastResync is enabled on a volume Disabling FastResync Performing online relayout Permitted relayout transformations Specifying a non-default layout Specifying a plex for relayout
Tagging a relayout operation Viewing the status of a relayout Controlling the progress of a relayout Converting between layered and non-layered volumes Chapter 9 Administering volume snapshots About volume snapshots Traditional third-mirror break-off snapshots Full-sized instant snapshots Space-optimized instant snapshots Emulation of third-mirror break-off snapshots Linked break-off snapshot volumes Cascaded snapshots Creating a snapshot of a snapshot Creating multiple snapshots Restoring the original volume from a snapshot Creating instant snapshots Preparing to create instant and break-off snapshots Creating and managing space-optimized instant snapshots Creating and managing full-sized instant snapshots Creating and managing third-mirror break-off snapshots Creating and managing linked break-off snapshot volumes Creating multiple instant snapshots Creating instant snapshots of volume sets Adding snapshot mirrors to a volume Removing a snapshot mirror Removing a linked break-off snapshot volume Adding a snapshot to a cascaded snapshot hierarchy Refreshing an instant snapshot
Reattaching an instant snapshot Reattaching a linked break-off snapshot volume Restoring a volume from an instant snapshot Dissociating an instant snapshot Removing an instant snapshot Splitting an instant snapshot hierarchy Displaying instant snapshot information Controlling instant snapshot synchronization Listing the snapshots created on a cache Tuning the autogrow attributes of a cache Growing and shrinking a cache Removing a cache Creating traditional third-mirror break-off snapshots Converting a plex into a snapshot plex Creating multiple snapshots Reattaching a snapshot volume Adding plexes to a snapshot volume Dissociating a snapshot volume Displaying snapshot information Adding a version 0 DCO and DCO volume Specifying storage for version 0 DCO plexes Removing a version 0 DCO and DCO volume Reattaching a version 0 DCO and DCO volume Chapter 10 Creating and administering volume sets About volume sets Creating a volume set Adding a volume to a volume set Listing details of volume sets
Stopping and starting volume sets Removing a volume from a volume set Raw device node access to component volumes Enabling raw device access when creating a volume set Displaying the raw device access settings for a volume set Controlling raw device access for an existing volume set Chapter 11 Configuring off-host processing About off-host processing solutions Implemention of off-host processing solutions Implementing off-host online backup Implementing decision support Chapter 12 Administering hot-relocation About hot-relocation How hot-relocation works Partial disk failure mail messages Complete disk failure mail messages How space is chosen for relocation Configuring a system for hot-relocation Displaying spare disk information Marking a disk as a hot-relocation spare Removing a disk from use as a hot-relocation spare Excluding a disk from hot-relocation use Making a disk available for hot-relocation use Configuring hot-relocation to use only spare disks Moving relocated subdisks Moving relocated subdisks using vxdiskadm Moving relocated subdisks using vxassist Moving relocated subdisks using vxunreloc
Restarting vxunreloc after errors Modifying the behavior of hot-relocation Chapter 13 Administering cluster functionality About the cluster functionality of VxVM Overview of cluster volume management Private and shared disk groups Activation modes of shared disk groups Connectivity policy of shared disk groups Effect of disk connectivity on cluster reconfiguration Limitations of shared disk groups Cluster initialization and configuration Cluster reconfiguration Volume reconfiguration Node shutdown Node abort Cluster shutdown Dirty region logging in cluster environments How DRL works in a cluster environment Multiple host failover configurations Import lock Failover Corruption of disk group configuration Administering VxVM in cluster environments Requesting node status and discovering the master node Determining if a disk is shareable Listing shared disk groups Creating a shared disk group Forcibly adding a disk to a disk group
Importing disk groups as shared Converting a disk group from shared to private Moving objects between shared disk groups Splitting shared disk groups Joining shared disk groups Changing the activation mode on a shared disk group Setting the disk detach policy on a shared disk group Setting the disk group failure policy on a shared disk group Creating volumes with exclusive open access by a node Setting exclusive open access to a volume by a node Displaying the cluster protocol version Displaying the supported cluster protocol version range Upgrading the cluster protocol version Recovering volumes in shared disk groups Obtaining cluster performance statistics Chapter 14 Administering sites and remote mirrors About sites and remote mirrors Configuring sites for hosts and disks Configuring site-based allocation on a disk group Configuring site consistency on a disk group Configuring site consistency on a volume Setting the siteread policy on a volume Site-based allocation of storage to volumes Examples of storage allocation by specifying sites Making an existing disk group site consistent Fire drill — testing the configuration Simulating site failure Recovery from simulated site failure
Failure scenarios and recovery procedures Recovering from a loss of site connectivity Recovering from host failure Recovering from storage failure Recovering from site failure Chapter 15 Using Storage Expert About Storage Expert How Storage Expert works Before using Storage Expert Running Storage Expert Discovering what a rule does Displaying rule attributes and their default values Running a rule Identifying configuration problems using Storage Expert Recovery time Disk groups Disk striping Disk sparing and relocation management Hardware failures System name Rule definitions and attributes Chapter 16 Performance monitoring and tuning Performance guidelines Data assignment Striping Mirroring Combining mirroring and striping RAID-5
Volume read policies Performance monitoring Setting performance priorities Obtaining performance data Using performance data Tuning VxVM General tuning guidelines Tuning guidelines for large systems Changing the values of tunables Tunable parameters Appendix A Using Veritas Volume Manager commands About Veritas Volume Manager commands Online manual pages Section 1M — administrative commands Section 4 — file formats Section 7 — device driver interfaces Appendix B Configuring Veritas Volume Manager Setup tasks after installation Unsupported disk arrays Foreign devices Initialization of disks and creation of disk groups Guidelines for configuring storage Mirroring guidelines Dirty region logging guidelines Striping guidelines RAID-5 guidelines Hot-relocation guidelines Accessing volume devices
VxVM's view of multipathed devices Cluster support Configuring shared disk groups Converting existing VxVM disk groups to shared disk groups Reconfiguration tasks Default disk group name
Dirty region logs Log subdisks and plexes Sequential DRL SmartSync recovery accelerator Volume snapshots Comparison of snapshot features FastResync FastResync enhancements Non-persistent FastResync Persistent FastResync DCO volume versioning FastResync limitations Hot-relocation Volume sets Chapter 2 Administering disks About disk management Disk devices Disk device naming in VxVM Private and public disk regions Discovering and configuring newly added disk devices Partial device discovery Discovering disks and dynamically adding disk arrays Third-party driver coexistence How to administer the Device Discovery Layer Disks under VxVM control Discovering the association between enclosure-based disk names and OS-based disk names Disk installation and formatting Displaying or changing default disk layout attributes
Adding a disk to VxVM Disk reinitialization Using vxdiskadd to put a disk under VxVM control Dynamic LUN expansion Extended Copy Service Enabling a disk for Extended Copy Service operation Removing disks Removing a disk with subdisks Removing a disk with no subdisks Removing a disk from VxVM control Removing and replacing disks Replacing a failed or removed disk Enabling a disk Taking a disk offline Renaming a disk Reserving disks Displaying disk information Displaying disk information with vxdiskadm Chapter 3 Administering Dynamic Multipathing How DMP works How DMP monitors I/O on paths Load balancing Using DMP with LVM boot disks Disabling MPIO DMP in a clustered environment Disabling multipathing and making devices invisible to VxVM Enabling multipathing and making devices visible to VxVM Enabling and disabling I/O for controllers and storage processors
Displaying DMP database information Displaying the paths to a disk Administering DMP using vxdmpadm Retrieving information about a DMP node Displaying the members of a LUN group Displaying paths controlled by a DMP node, controller or array port Displaying information about controllers Displaying information about enclosures Displaying information about array ports Displaying information about TPD-controlled devices Gathering and displaying I/O statistics Setting the attributes of the paths to an enclosure Displaying the I/O policy Specifying the I/O policy Disabling I/O for paths, controllers or array ports Enabling I/O for paths, controllers or array ports Upgrading disk controller firmware Renaming an enclosure Configuring the response to I/O failures Configuring the I/O throttling mechanism Displaying recovery option values Configuring DMP path restoration policies Stopping the DMP path restoration thread Displaying the status of the DMP path restoration thread Displaying information about the DMP error-handling thread Configuring array policy modules Chapter 4 Creating and administering disk groups About disk groups
Specification of disk groups to commands System-wide reserved disk groups Rules for determining the default disk group Displaying disk group information Displaying free space in a disk group Creating a disk group Adding a disk to a disk group Removing a disk from a disk group Deporting a disk group Importing a disk group Handling disks with duplicated identifiers Writing a new UDID to a disk Importing a disk group containing cloned disks Sample cases of operations on cloned disks Renaming a disk group Moving disks between disk groups Moving disk groups between systems Handling errors when importing disks Reserving minor numbers for disk groups Compatibility of disk groups between platforms Handling conflicting configuration copies Example of a serial split brain condition in a cluster Correcting conflicting configuration information Reorganizing the contents of disk groups Limitations of disk group split and join Listing objects potentially affected by a move Moving objects between disk groups Splitting disk groups
Joining disk groups Disabling a disk group Destroying a disk group Recovering a destroyed disk group Upgrading a disk group Managing the configuration daemon in VxVM Backing up and restoring disk group configuration data Using vxnotify to monitor configuration changes Chapter 5 Creating and administering subdisks About subdisks Creating subdisks Displaying subdisk information Moving subdisks Splitting subdisks Joining subdisks Associating subdisks with plexes Associating log subdisks Dissociating subdisks from plexes Removing subdisks Changing subdisk attributes Chapter 6 Creating and administering plexes About plexes Creating plexes Creating a striped plex Displaying plex information Plex states Plex condition flags Plex kernel states
Attaching and associating plexes Taking plexes offline Detaching plexes Reattaching plexes Moving plexes Copying plexes Dissociating and removing plexes Changing plex attributes Chapter 7 Creating volumes About volume creation Types of volume layouts Supported volume logs and maps Creating a volume Advanced approach Assisted approach Using vxassist Setting default values for vxassist Discovering the maximum size of a volume Disk group alignment constraints on volumes Creating a volume on any disk Creating a volume on specific disks Specifying ordered allocation of storage to volumes Creating a mirrored volume Creating a mirrored-concatenated volume Creating a concatenated-mirror volume Creating a volume with a version 0 DCO volume Creating a volume with a version 20 DCO volume Creating a volume with dirty region logging enabled
Creating a striped volume Creating a mirrored-stripe volume Creating a striped-mirror volume Mirroring across targets, controllers or enclosures Creating a RAID-5 volume Creating tagged volumes Creating a volume using vxmake Creating a volume using a vxmake description file Initializing and starting a volume Initializing and starting a volume created using vxmake Accessing a volume Chapter 8 Administering volumes About volume administration Displaying volume information Volume states Volume kernel states Monitoring and controlling tasks Specifying task tags Managing tasks with vxtask Stopping a volume Putting a volume in maintenance mode Starting a volume Adding a mirror to a volume Mirroring all volumes Mirroring volumes on a VM disk Removing a mirror Adding logs and maps to volumes Preparing a volume for DRL and instant snapshots
Specifying storage for version 20 DCO plexes Using a DCO and DCO volume with a RAID-5 volume Determining the DCO version number Determining if DRL is enabled on a volume Determining if DRL logging is active on a volume Disabling and re-enabling DRL Removing support for DRL and instant snapshots from a volume Upgrading existing volumes to use version 20 DCOs Adding traditional DRL logging to a mirrored volume Removing a traditional DRL log Adding a RAID-5 log Adding a RAID-5 log using vxplex Removing a RAID-5 log Resizing a volume Resizing volumes using vxresize Resizing volumes using vxassist Resizing volumes using vxvol Setting tags on volumes Changing the read policy for mirrored volumes Removing a volume Moving volumes from a VM disk Enabling FastResync on a volume Checking whether FastResync is enabled on a volume Disabling FastResync Performing online relayout Permitted relayout transformations Specifying a non-default layout Specifying a plex for relayout
Tagging a relayout operation Viewing the status of a relayout Controlling the progress of a relayout Converting between layered and non-layered volumes Chapter 9 Administering volume snapshots About volume snapshots Traditional third-mirror break-off snapshots Full-sized instant snapshots Space-optimized instant snapshots Emulation of third-mirror break-off snapshots Linked break-off snapshot volumes Cascaded snapshots Creating a snapshot of a snapshot Creating multiple snapshots Restoring the original volume from a snapshot Creating instant snapshots Preparing to create instant and break-off snapshots Creating and managing space-optimized instant snapshots Creating and managing full-sized instant snapshots Creating and managing third-mirror break-off snapshots Creating and managing linked break-off snapshot volumes Creating multiple instant snapshots Creating instant snapshots of volume sets Adding snapshot mirrors to a volume Removing a snapshot mirror Removing a linked break-off snapshot volume Adding a snapshot to a cascaded snapshot hierarchy Refreshing an instant snapshot
Reattaching an instant snapshot Reattaching a linked break-off snapshot volume Restoring a volume from an instant snapshot Dissociating an instant snapshot Removing an instant snapshot Splitting an instant snapshot hierarchy Displaying instant snapshot information Controlling instant snapshot synchronization Listing the snapshots created on a cache Tuning the autogrow attributes of a cache Growing and shrinking a cache Removing a cache Creating traditional third-mirror break-off snapshots Converting a plex into a snapshot plex Creating multiple snapshots Reattaching a snapshot volume Adding plexes to a snapshot volume Dissociating a snapshot volume Displaying snapshot information Adding a version 0 DCO and DCO volume Specifying storage for version 0 DCO plexes Removing a version 0 DCO and DCO volume Reattaching a version 0 DCO and DCO volume Chapter 10 Creating and administering volume sets About volume sets Creating a volume set Adding a volume to a volume set Listing details of volume sets
Stopping and starting volume sets Removing a volume from a volume set Raw device node access to component volumes Enabling raw device access when creating a volume set Displaying the raw device access settings for a volume set Controlling raw device access for an existing volume set Chapter 11 Configuring off-host processing About off-host processing solutions Implemention of off-host processing solutions Implementing off-host online backup Implementing decision support Chapter 12 Administering hot-relocation About hot-relocation How hot-relocation works Partial disk failure mail messages Complete disk failure mail messages How space is chosen for relocation Configuring a system for hot-relocation Displaying spare disk information Marking a disk as a hot-relocation spare Removing a disk from use as a hot-relocation spare Excluding a disk from hot-relocation use Making a disk available for hot-relocation use Configuring hot-relocation to use only spare disks Moving relocated subdisks Moving relocated subdisks using vxdiskadm Moving relocated subdisks using vxassist Moving relocated subdisks using vxunreloc
Restarting vxunreloc after errors Modifying the behavior of hot-relocation Chapter 13 Administering cluster functionality About the cluster functionality of VxVM Overview of cluster volume management Private and shared disk groups Activation modes of shared disk groups Connectivity policy of shared disk groups Effect of disk connectivity on cluster reconfiguration Limitations of shared disk groups Cluster initialization and configuration Cluster reconfiguration Volume reconfiguration Node shutdown Node abort Cluster shutdown Dirty region logging in cluster environments How DRL works in a cluster environment Multiple host failover configurations Import lock Failover Corruption of disk group configuration Administering VxVM in cluster environments Requesting node status and discovering the master node Determining if a disk is shareable Listing shared disk groups Creating a shared disk group Forcibly adding a disk to a disk group
Importing disk groups as shared Converting a disk group from shared to private Moving objects between shared disk groups Splitting shared disk groups Joining shared disk groups Changing the activation mode on a shared disk group Setting the disk detach policy on a shared disk group Setting the disk group failure policy on a shared disk group Creating volumes with exclusive open access by a node Setting exclusive open access to a volume by a node Displaying the cluster protocol version Displaying the supported cluster protocol version range Upgrading the cluster protocol version Recovering volumes in shared disk groups Obtaining cluster performance statistics Chapter 14 Administering sites and remote mirrors About sites and remote mirrors Configuring sites for hosts and disks Configuring site-based allocation on a disk group Configuring site consistency on a disk group Configuring site consistency on a volume Setting the siteread policy on a volume Site-based allocation of storage to volumes Examples of storage allocation by specifying sites Making an existing disk group site consistent Fire drill — testing the configuration Simulating site failure Recovery from simulated site failure
Failure scenarios and recovery procedures Recovering from a loss of site connectivity Recovering from host failure Recovering from storage failure Recovering from site failure Chapter 15 Using Storage Expert About Storage Expert How Storage Expert works Before using Storage Expert Running Storage Expert Discovering what a rule does Displaying rule attributes and their default values Running a rule Identifying configuration problems using Storage Expert Recovery time Disk groups Disk striping Disk sparing and relocation management Hardware failures System name Rule definitions and attributes Chapter 16 Performance monitoring and tuning Performance guidelines Data assignment Striping Mirroring Combining mirroring and striping RAID-5
Volume read policies Performance monitoring Setting performance priorities Obtaining performance data Using performance data Tuning VxVM General tuning guidelines Tuning guidelines for large systems Changing the values of tunables Tunable parameters Appendix A Using Veritas Volume Manager commands About Veritas Volume Manager commands Online manual pages Section 1M — administrative commands Section 4 — file formats Section 7 — device driver interfaces Appendix B Configuring Veritas Volume Manager Setup tasks after installation Unsupported disk arrays Foreign devices Initialization of disks and creation of disk groups Guidelines for configuring storage Mirroring guidelines Dirty region logging guidelines Striping guidelines RAID-5 guidelines Hot-relocation guidelines Accessing volume devices
VxVM's view of multipathed devices Cluster support Configuring shared disk groups Converting existing VxVM disk groups to shared disk groups Reconfiguration tasks Default disk group name
Related Documents
Vxvm
May 2020 4
Vxvm
November 2019 11
Vxvm Toc
May 2020 1
Vxvm Commands
May 2020 1
Vmmaintenenace(vxvm)
May 2020 2