Veritas InfoScale™ 7.4 Solutions Guide - Linux

Last Published:
Product(s): InfoScale & Storage Foundation (7.4)
Platform: Linux
  1. Section I. Introducing Veritas InfoScale
    1. Introducing Veritas InfoScale
      1.  
        About the Veritas InfoScale product suite
      2.  
        Components of the Veritas InfoScale product suite
  2. Section II. Solutions for Veritas InfoScale products
    1. Solutions for Veritas InfoScale products
      1.  
        Use cases for Veritas InfoScale products
      2.  
        Feature support across Veritas InfoScale 7.4 products
      3.  
        Using SmartMove and Thin Provisioning with Sybase databases
      4.  
        Running multiple parallel applications within a single cluster using the application isolation feature
      5.  
        Scaling FSS storage capacity with dedicated storage nodes using application isolation feature
      6.  
        Finding Veritas InfoScale product use cases information
  3. Section III. Stack-level migration to IPv6 or dual stack
    1. Stack-level migration to IPv6 or dual stack
      1.  
        Migrating Veritas InfoScale products to support IPv6/dual-stack
  4. Section IV. Improving database performance
    1. Overview of database accelerators
      1.  
        About Veritas InfoScale product components database accelerators
    2. Improving database performance with Veritas Concurrent I/O
      1. About Concurrent I/O
        1.  
          How Concurrent I/O works
      2. Tasks for enabling and disabling Concurrent I/O
        1.  
          Enabling Concurrent I/O for Sybase
        2.  
          Disabling Concurrent I/O for Sybase
    3. Improving database performance with atomic write I/O
      1.  
        About the atomic write I/O
      2.  
        Requirements for atomic write I/O
      3.  
        Restrictions on atomic write I/O functionality
      4.  
        How the atomic write I/O feature of Storage Foundation helps MySQL databases
      5.  
        VxVM and VxFS exported IOCTLs
      6.  
        Configuring atomic write I/O support for MySQL on VxVM raw volumes
      7.  
        Configuring atomic write I/O support for MySQL on VxFS file systems
      8.  
        Dynamically growing the atomic write capable file system
      9.  
        Disabling atomic write I/O support
  5. Section V. Using point-in-time copies
    1. Understanding point-in-time copy methods
      1. About point-in-time copies
        1.  
          Implementing point-in time copy solutions on a primary host
        2.  
          Implementing off-host point-in-time copy solutions
      2.  
        When to use point-in-time copies
      3. About Storage Foundation point-in-time copy technologies
        1. Volume-level snapshots
          1.  
            Persistent FastResync of volume snapshots
          2.  
            Data integrity in volume snapshots
        2.  
          Storage Checkpoints
    2. Backing up and recovering
      1.  
        Storage Foundation and High Availability Solutions backup and recovery methods
      2. Preserving multiple point-in-time copies
        1.  
          Setting up multiple point-in-time copies
        2.  
          Refreshing point-in-time copies
        3.  
          Recovering from logical corruption
        4.  
          Off-host processing using refreshed snapshot images
      3. Online database backups
        1. Making a backup of an online database on the same host
          1.  
            Preparing a full-sized instant snapshot for a backup
          2.  
            Preparing a space-optimized snapshot for a database backup
          3.  
            Backing up a Sybase database on the same host
          4.  
            Resynchronizing a volume
        2. Making an off-host backup of an online database
          1.  
            Making an off-host backup of an online Sybase database
          2.  
            Resynchronizing a volume
      4. Backing up on an off-host cluster file system
        1.  
          Mounting a file system for shared access
        2.  
          Preparing a snapshot of a mounted file system with shared access
        3.  
          Backing up a snapshot of a mounted file system with shared access
        4.  
          Resynchronizing a volume from its snapshot volume
        5.  
          Reattaching snapshot plexes
      5. Database recovery using Storage Checkpoints
        1.  
          Creating Storage Checkpoints
        2.  
          Rolling back a database
    3. Backing up and recovering in a NetBackup environment
      1.  
        About Veritas NetBackup
      2.  
        About using NetBackup for backup and restore for Sybase
      3. Using NetBackup in an SFHA Solutions product environment
        1.  
          Clustering a NetBackup Master Server
        2.  
          Backing up and recovering a VxVM volume using NetBackup
        3.  
          Recovering a VxVM volume using NetBackup
    4. Off-host processing
      1.  
        Veritas InfoScale Storage Foundation off-host processing methods
      2. Using a replica database for decision support
        1. Creating a replica database on the same host
          1.  
            Preparing for the replica database
          2.  
            Creating a replica database
        2. Creating an off-host replica database
          1.  
            Setting up a replica database for off-host decision support
          2.  
            Resynchronizing the data with the primary host
          3.  
            Updating a warm standby Sybase ASE 12.5 database
          4.  
            Reattaching snapshot plexes
      3.  
        What is off-host processing?
      4.  
        About using VVR for off-host processing
    5. Creating and refreshing test environments
      1.  
        About test environments
      2.  
        Creating a test environment
      3.  
        Refreshing a test environment
    6. Creating point-in-time copies of files
      1. Using FileSnaps to create point-in-time copies of files
        1.  
          Using FileSnaps to provision virtual desktops
        2.  
          Using FileSnaps to optimize write intensive applications for virtual machines
        3.  
          Using FileSnaps to create multiple copies of data instantly
  6. Section VI. Maximizing storage utilization
    1. Optimizing storage tiering with SmartTier
      1.  
        About SmartTier
      2.  
        About VxFS multi-volume file systems
      3.  
        About VxVM volume sets
      4.  
        About volume tags
      5.  
        SmartTier use cases for Sybase
      6.  
        Setting up a filesystem for storage tiering with SmartTier
      7.  
        Relocating old archive logs to tier two storage using SmartTier
      8.  
        Relocating inactive tablespaces or segments to tier two storage
      9.  
        Relocating active indexes to premium storage
      10.  
        Relocating all indexes to premium storage
    2. Optimizing storage with Flexible Storage Sharing
      1. About Flexible Storage Sharing
        1.  
          Limitations of Flexible Storage Sharing
      2.  
        About use cases for optimizing storage with Flexible Storage Sharing
      3.  
        Setting up an SFRAC clustered environment with shared nothing storage
      4.  
        Implementing the SmartTier feature with hybrid storage
      5.  
        Configuring a campus cluster without shared storage
  7. Section VII. Migrating data
    1. Understanding data migration
      1.  
        Types of data migration
    2. Offline migration from LVM to VxVM
      1.  
        About migration from LVM
      2.  
        Converting unused LVM physical volumes to VxVM disks
      3. LVM volume group to VxVM disk group conversion
        1.  
          Volume group conversion limitations
        2.  
          Converting LVM volume groups to VxVM disk groups
        3. Examples of second stage failure analysis
          1.  
            Snapshot in the volume group
          2.  
            dm_mirror module not loaded in the kernel
          3.  
            Conversion requires extent movement on an LVM1 volume group
          4.  
            Unrecognized partition in volume group
      4. LVM volume group restoration
        1.  
          Restoring an LVM volume group
    3. Offline conversion of native file system to VxFS
      1.  
        About the offline conversion of native file system to VxFS
      2.  
        Requirements for offline conversion of a native file system to VxFS
      3.  
        Converting the native file system to VxFS
    4. Online migration of a native file system to the VxFS file system
      1.  
        About online migration of a native file system to the VxFS file system
      2.  
        Administrative interface for online migration of a native file system to the VxFS file system
      3.  
        Migrating a native file system to the VxFS file system
      4.  
        Backing out an online migration of a native file system to the VxFS file system
      5. VxFS features not available during online migration
        1.  
          Limitations of online migration
    5. Migrating storage arrays
      1.  
        Array migration for storage using Linux
      2.  
        Overview of storage mirroring for migration
      3.  
        Allocating new storage
      4.  
        Initializing the new disk
      5.  
        Checking the current VxVM information
      6.  
        Adding a new disk to the disk group
      7.  
        Mirroring
      8.  
        Monitoring
      9.  
        Mirror completion
      10.  
        Removing old storage
      11.  
        Post-mirroring steps
    6. Migrating data between platforms
      1. Overview of the Cross-Platform Data Sharing (CDS) feature
        1.  
          Shared data across platforms
        2.  
          Disk drive sector size
        3.  
          Block size issues
        4.  
          Operating system data
      2. CDS disk format and disk groups
        1. CDS disk access and format
          1. CDS disk types
            1.  
              Private and public regions
            2.  
              Disk access type auto
            3.  
              Platform block
            4.  
              AIX coexistence label
            5.  
              HP-UX coexistence label
            6.  
              VxVM ID block
          2. About Cross-platform Data Sharing (CDS) disk groups
            1.  
              Device quotas
            2.  
              Minor device numbers
        2.  
          Non-CDS disk groups
        3. Disk group alignment
          1. Alignment values
            1.  
              Dirty region log alignment
          2.  
            Object alignment during volume creation
      3. Setting up your system to use Cross-platform Data Sharing (CDS)
        1. Creating CDS disks from uninitialized disks
          1.  
            Creating CDS disks by using vxdisksetup
          2.  
            Creating CDS disks by using vxdiskadm
        2. Creating CDS disks from initialized VxVM disks
          1.  
            Creating a CDS disk from a disk that is not in a disk group
          2.  
            Creating a CDS disk from a disk that is already in a disk group
        3. Creating CDS disk groups
          1.  
            Creating a CDS disk group by using vxdg init
          2.  
            Creating a CDS disk group by using vxdiskadm
        4.  
          Converting non-CDS disks to CDS disks
        5.  
          Converting a non-CDS disk group to a CDS disk group
        6.  
          Verifying licensing
        7.  
          Defaults files
      4. Maintaining your system
        1. Disk tasks
          1.  
            Changing the default disk format
          2.  
            Restoring CDS disk labels
        2. Disk group tasks
          1.  
            Changing the alignment of a disk group during disk encapsulation
          2.  
            Changing the alignment of a non-CDS disk group
          3.  
            Splitting a CDS disk group
          4.  
            Moving objects between CDS disk groups and non-CDS disk groups
          5.  
            Moving objects between CDS disk groups
          6.  
            Joining disk groups
          7.  
            Changing the default CDS setting for disk group creation
          8.  
            Creating non-CDS disk groups
          9.  
            Upgrading an older version non-CDS disk group
          10.  
            Replacing a disk in a CDS disk group
          11.  
            Setting the maximum number of devices for CDS disk groups
          12.  
            Changing the DRL map and log size
          13.  
            Creating a volume with a DRL log
          14.  
            Setting the DRL map length
        3. Displaying information
          1.  
            Determining the setting of the CDS attribute on a disk group
          2.  
            Displaying the maximum number of devices in a CDS disk group
          3.  
            Displaying map length and map alignment of traditional DRL logs
          4.  
            Displaying the disk group alignment
          5.  
            Displaying the log map length and alignment
          6.  
            Displaying offset and length information in units of 512 bytes
        4.  
          Default activation mode of shared disk groups
        5.  
          Additional considerations when importing CDS disk groups
      5. File system considerations
        1.  
          Considerations about data in the file system
        2.  
          File system migration
        3. Specifying the migration target
          1.  
            Examples of target specifications
        4. Using the fscdsadm command
          1.  
            Checking that the metadata limits are not exceeded
          2. Maintaining the list of target operating systems
            1.  
              Adding an entry to the list of target operating systems
            2.  
              Removing an entry from the list of target operating systems
            3.  
              Removing all entries from the list of target operating systems
            4.  
              Displaying the list of target operating systems
          3.  
            Enforcing the established CDS limits on a file system
          4.  
            Ignoring the established CDS limits on a file system
          5.  
            Validating the operating system targets for a file system
          6.  
            Displaying the CDS status of a file system
        5.  
          Migrating a file system one time
        6. Migrating a file system on an ongoing basis
          1.  
            Stopping ongoing migration
        7.  
          When to convert a file system
        8. Converting the byte order of a file system
          1.  
            Importing and mounting a file system from another system
      6.  
        Alignment value and block size
      7.  
        Migrating a snapshot volume
    7. Migrating from Oracle ASM to Veritas File System
      1.  
        About the migration
      2.  
        Pre-requisites for migration
      3.  
        Preparing to migrate
      4.  
        Migrating Oracle databases from Oracle ASM to VxFS
  8. Section VIII. Just in time availability solution for vSphere
    1. Just in time availability solution for vSphere
      1. About Just In Time Availability
        1.  
          Getting started with Just In Time Availability
      2.  
        Prerequisites
      3.  
        Supported operating systems and configurations
      4.  
        Setting up a plan
      5.  
        Managing a plan
      6.  
        Deleting a plan
      7.  
        Viewing the properties
      8.  
        Viewing the history tab
      9.  
        Limitations of Just In Time Availability
  9. Section IX. Veritas InfoScale 4K sector device support solution
    1. Veritas InfoScale 4k sector device support solution
      1.  
        About 4K sector size technology
      2.  
        Veritas InfoScale unsupported configurations
      3.  
        Migrating VxFS file system from 512-bytes sector size devices to 4K sector size devices
  10. Section X. Reference
    1. Appendix A. Veritas AppProtect logs and operation states
      1.  
        Log files
      2.  
        Plan states
    2. Appendix B. Troubleshooting Veritas AppProtect
      1.  
        Troubleshooting Just In Time Availability

Setting up multiple point-in-time copies

To set up the initial configuration for multiple point-in-time copies, set up storage for the point-in-time copies that will be configured over time.

In the example procedures, disk1, disk2, …, diskN are the LUNs configured on tier 1 storage for application data. A subset of these LUNs logdisk1, logdisk2, …, logdiskN, will be used to configure DCO. Disks sdisk1, sdisk2, …, sdiskN are disks from tier 2 storage.

Note:

If you have an enclosure or disk array with storage that is backed by write cache, Veritas recommends that you use the same set of LUNs for the DCO and for the data volume.

If no logdisks are specified by default, Veritas Volume Manager (VxVM) tries to allocate the DCO from the same LUNs used for the data volumes.

See Figure: Example connectivity for off-host solution using redundant-loop access.

You will need to make sure your cache is big enough for the multiple copies with multiple changes. The following guidelines may be useful for estimating your requirements.

To determine your storage requirements, use the following:

Table: Storage requirements

Sp

Represents the storage requirement for the primary volume

Sb

Represents the storage requirement for the primary break-off snapshot.

Nc

Represents the number of point-in-time copies to be maintained.

Sc

Represents the average size of the changes that occur in an interval before the snapshot is taken.

St

Represents the total storage requirement.

The total storage requirement for management of multiple point-in-time copies can be roughly calculated as:

Sb = Sp

St = Sb + Nc * Sc

To determine the size of the cache volume, use the following:

Table: Cache volume requirements

Nc

Represents the number of point-in-time copies to be maintained.

Sc

Represents the average size of the changes that occur in an interval .

Rc

Represents the region-size for cache-object.

St

Represents the total storage requirement.

The size of cache-volume to be configured can be calculated as:

Nc * Sc * Rc

This equation assumes that the application IO size granularity is smaller than cache-object region-size by factor of at most Rc

To configure the initial setup for multiple point-in-time copies

  1. If the primary application storage is already configured for snapshots, that is, the DCO is already attached for the primary volume, go to step 2.

    If not, configure the primary volumes and prepare them for snapshots.

    For example:

    # vxassist -g appdg make appvol 10T <disk1 disk2 ... diskN >
# vxsnap -g appdg prepare appvol
  2. Configure a snapshot volume to use as the primary, full-image snapshot of the primary volume. The snapshot volume can be allocated from tier 2 storage.
    # vxassist -g appdg make snap-appvol 10T <sdisk1 sdisk2 ... sdiskN >
# vxsnap -g appdg prepare snap-appvol  \
<alloc=slogdisk1, slogdisk2, ...slogdiskN>
  3. Establish the relationship between the primary volume and the snapshot volume. Wait for synchronization of the snapshot to complete.
    # vxsnap -g appdg make source=appvol/snapvol=snap-appvol/sync=yes
# vxsnap -g appdg syncwait snap-appvol
  4. Create a volume in the disk group to use for the cache volume. The cache volume is used for space-optimized point-in-time copies created at regular intervals. The cache volume can be allocated from tier 2 storage.
    # vxassist -g appdg make cachevol 1G layout=mirror \
init=active disk16 disk17
  5. Configure a shared cache object on the cache volume.
    # vxmake -g appdg cache snapcache cachevolname=cachevol
  6. Start the cache object.
    # vxcache -g appdg start snapcache

    You now have an initial setup in place to create regular point-in-time copies.