InfoScale™ 9.0 Storage and Availability Management for DB2 Databases - AIX, Linux

Last Published:
Product(s): InfoScale & Storage Foundation (9.0)
Platform: AIX,Linux
  1. Section I. Storage Foundation High Availability (SFHA) management solutions for DB2 databases
    1. Overview of Storage Foundation for Databases
      1.  
        Introducing Storage Foundation High Availability (SFHA) Solutions for DB2
      2. About the File System component
        1.  
          About the File System intent log
        2.  
          About extents
        3.  
          About file system disk layouts
      3.  
        About the Volume Manager component
      4.  
        About Dynamic Multi-Pathing (DMP)
      5.  
        About Cluster Server
      6.  
        About Cluster Server agents
      7.  
        About InfoScale Operations Manager
      8.  
        Feature support for DB2 across InfoScale products
      9.  
        Use cases for InfoScale products
  2. Section II. Deploying DB2 with InfoScale products
    1. Deployment options for DB2 in a Storage Foundation environment
      1.  
        DB2 deployment options in an InfoScale environment
      2.  
        DB2 on a single system with Storage Foundation
      3.  
        DB2 on a single system with off-host in a Storage Foundation environment
      4.  
        DB2 in a highly available cluster with Storage Foundation High Availability
      5.  
        DB2 in a parallel cluster with SF Cluster File System HA
      6.  
        Deploying DB2 and Storage Foundation in a virtualization environment
      7.  
        Deploying DB2 with Storage Foundation SmartMove and Thin Provisioning
    2. Deploying DB2 with Storage Foundation
      1.  
        Tasks for deploying DB2 databases
      2.  
        About selecting a volume layout for deploying DB2
      3. Setting up disk group for deploying DB2
        1.  
          Disk group configuration guidelines for deploying DB2
      4. Creating volumes for deploying DB2
        1.  
          Volume configuration guidelines for deploying DB2
      5. Creating VxFS file system for deploying DB2
        1.  
          File system creation guidelines for deploying DB2
      6.  
        Mounting the file system for deploying DB2
      7.  
        Installing DB2 and creating database
    3. Deploying DB2 in an off-host configuration with Storage Foundation
      1.  
        Requirements for an off-host database configuration
    4. Deploying DB2 with High Availability
      1.  
        Tasks for deploying DB2 in an HA configuration
      2.  
        Configuring VCS to make the database highly available
  3. Section III. Configuring Storage Foundation for Database (SFDB) tools
    1. Configuring and managing the Storage Foundation for Databases repository database
      1.  
        About the Storage Foundation for Databases (SFDB) repository
      2.  
        Requirements for Storage Foundation for Databases (SFDB) tools
      3.  
        Storage Foundation for Databases (SFDB) tools availability
      4. Configuring the Storage Foundation for Databases (SFDB) tools repository
        1.  
          Locations for the SFDB repository
      5.  
        Updating the Storage Foundation for Databases (SFDB) repository after adding a node
      6.  
        Updating the Storage Foundation for Databases (SFDB) repository after removing a node
      7.  
        Removing the Storage Foundation for Databases (SFDB) repository
    2. Configuring authentication for Storage Foundation for Databases (SFDB) tools
      1.  
        Configuring vxdbd for SFDB tools authentication
      2.  
        Adding nodes to a cluster that is using authentication for SFDB tools
      3.  
        Authorizing users to run SFDB commands
  4. Section IV. Improving DB2 database performance
    1. About database accelerators
      1.  
        About InfoScale product components database accelerators
    2. Improving database performance with Quick I/O
      1.  
        About Quick I/O
      2.  
        How Quick I/O improves database performance
      3.  
        Tasks for setting up Quick I/O in a database environment
      4.  
        Preallocating space for Quick I/O files using the setext command
      5.  
        Accessing regular VxFS files as Quick I/O files
      6.  
        Converting DB2 containers to Quick I/O files
      7.  
        About sparse files
      8.  
        Displaying Quick I/O status and file attributes
      9.  
        Extending a Quick I/O file
      10.  
        Monitoring tablespace free space with DB2 and extending tablespace containers
      11.  
        Recreating Quick I/O files after restoring a database
      12.  
        Disabling Quick I/O
    3. Improving DB2 database performance with VxFS 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 DB2
        2.  
          Disabling Concurrent I/O for DB2
  5. Section V. Using point-in-time copies
    1. Understanding point-in-time copy methods
      1.  
        About point-in-time copies
      2.  
        When to use point-in-time copies
      3.  
        About Storage Foundation point-in-time copy technologies
      4.  
        Point-in-time copy solutions supported by SFDB tools
      5.  
        About snapshot modes supported by Storage Foundation for Databases (SFDB) tools
      6. Volume-level snapshots
        1.  
          Persistent FastResync of volume snapshots
        2.  
          Data integrity in volume snapshots
        3.  
          Third-mirror break-off snapshots
      7. Storage Checkpoints
        1.  
          How Storage Checkpoints differ from snapshots
        2. How a Storage Checkpoint works
          1.  
            Copy-on-write
          2. Storage Checkpoint visibility
            1.  
              Storage Checkpoints and 64-bit inode numbers
        3.  
          About Database Rollbacks using Storage Checkpoints
        4.  
          Storage Checkpoints and Rollback process
        5.  
          Storage Checkpoint space management considerations
    2. Considerations for DB2 point-in-time copies
      1.  
        Considerations for DB2 database layouts
      2.  
        Supported DB2 configurations
    3. Administering third-mirror break-off snapshots
      1. Database FlashSnap for cloning
        1.  
          Database FlashSnap advantages
      2. Preparing hosts and storage for Database FlashSnap
        1. Setting up hosts
          1.  
            Database FlashSnap off-host configuration
        2.  
          Creating a snapshot mirror of a volume or volume set used by the database
      3.  
        Creating a clone of a database by using Database FlashSnap
      4.  
        Resynchronizing mirror volumes with primary volumes
      5.  
        Cloning a database on the secondary host
    4. Administering Storage Checkpoints
      1.  
        About Storage Checkpoints
      2. Database Storage Checkpoints for recovery
        1.  
          Advantages and limitations of Database Storage Checkpoints
      3.  
        Creating a Database Storage Checkpoint
      4.  
        Deleting a Database Storage Checkpoint
      5.  
        Mounting a Database Storage Checkpoint
      6.  
        Unmounting a Database Storage Checkpoint
      7.  
        Creating a database clone using a Database Storage Checkpoint
      8.  
        Restoring database from a Database Storage Checkpoint
      9.  
        Gathering data for offline-mode Database Storage Checkpoints
    5. Backing up and restoring with Netbackup in an SFHA environment
      1.  
        About NetBackup
      2.  
        About using NetBackup for backup and restore for DB2
      3. Using NetBackup in an InfoScale 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
  6. Section VI. Optimizing storage costs for DB2
    1. Understanding storage tiering with SmartTier
      1. About SmartTier
        1.  
          About VxFS multi-volume file systems
        2.  
          About VxVM volume sets
        3.  
          About volume tags
        4.  
          SmartTier file management
        5.  
          SmartTier sub-file object management
      2.  
        SmartTier in a High Availability (HA) environment
    2. SmartTier use cases for DB2
      1.  
        SmartTier use cases for DB2
      2.  
        Relocating old archive logs to tier two storage using SmartTier
      3.  
        Relocating inactive tablespaces or segments to tier two storage
      4.  
        Relocating active indexes to premium storage
      5.  
        Relocating all indexes to premium storage
  7. Section VII. Storage Foundation for Databases administrative reference
    1. Storage Foundation for Databases command reference
      1.  
        vxsfadm command reference
      2. FlashSnap reference
        1.  
          FlashSnap configuration parameters
        2.  
          FlashSnap supported operations
      3. Database Storage Checkpoints reference
        1.  
          Database Storage Checkpoints configuration parameters
        2.  
          Database Storage Checkpoints supported operations
    2. Tuning for Storage Foundation for Databases
      1.  
        Additional documentation
      2. About tuning Volume Manager (VxVM)
        1.  
          About obtaining volume I/O statistics
      3. About tuning File System (VxFS)
        1. How monitoring free space works
          1.  
            About monitoring fragmentation
        2.  
          How tuning VxFS I/O parameters works
        3.  
          About tunable VxFS I/O parameters
        4.  
          About obtaining file I/O statistics using the Quick I/O interface
        5.  
          About I/O statistics data
        6.  
          About I/O statistics
      4. About tuning DB2 databases
        1.  
          DB2_USE_PAGE_CONTAINER_TAG
        2.  
          DB2_PARALLEL_IO
        3.  
          PREFETCHSIZE and EXTENTSIZE
        4.  
          INTRA_PARALLEL
        5.  
          NUM_IOCLEANERS
        6.  
          NUM_IOSERVERS
        7.  
          CHNGPGS_THRESH
        8.  
          Table scans
        9.  
          Asynchronous I/O
        10.  
          Buffer pools
        11.  
          Memory allocation
        12.  
          TEMPORARY tablespaces
        13.  
          DMS containers
        14.  
          Data, indexes, and logs
        15.  
          Database statistics
      5.  
        About tuning AIX Virtual Memory Manager
    3. Troubleshooting SFDB tools
      1. About troubleshooting Storage Foundation for Databases (SFDB) tools
        1.  
          Running scripts for engineering support analysis for SFDB tools
        2.  
          Storage Foundation for Databases (SFDB) tools log files
      2. About the vxdbd daemon
        1.  
          Starting and stopping vxdbd
        2.  
          Configuring listening port for the vxdbd daemon
        3.  
          Limiting vxdbd resource usage
        4.  
          Configuring encryption ciphers for vxdbd
      3.  
        Troubleshooting vxdbd
      4. Resources for troubleshooting SFDB tools
        1.  
          SFDB logs
        2.  
          SFDB error messages
        3.  
          SFDB repository and repository files
      5.  
        Upgrading Storage Foundation for Databases (SFDB) tools from 5.0.x to 9.0 (2184482)

Enabling Concurrent I/O for DB2

Because you do not need to extend name spaces and present the files as devices, you can enable Concurrent I/O on regular files.

For DB2, you can enable an entire file system to use Concurrent I/O or you can enable specific SMS containers to use Concurrent I/O. If you enable a specific SMS container, the rest of the file system will use the regular buffer I/O.

Before enabling Concurrent I/O, review the following:

Prerequisites

  • To use the Concurrent I/O feature, the file system must be a VxFS file system.

  • Make sure the mount point on which you plan to mount the file system exists.

  • Make sure the DBA can access the mount point.

Usage notes

  • Files that are open and using Concurrent I/O cannot be opened simultaneously by a different user not using the Concurrent I/O feature.

  • NetBackup cannot backup a database file if the file is open and using Concurrent I/O. However, you can still backup the database online using the DB2 BACKUP utility.

  • When a file system is mounted with the Concurrent I/O option, do not enable Quick I/O. DB2 will not be able to open the Quick I/O files and the instance start up will fail. (Quick I/O is not available on Linux.)

  • If the Quick I/O feature is availabe, do not use any Quick I/O tools if the database is using Concurrent I/O.

  • See the mount_vxfs(1M) manual page for more information about mount settings.

For DB2, /mount_point is the directory in which you can put data containers of the SMS tablespaces using the Concurrent I/O feature.

Note:

This applies to both creating a new tablespace to use Concurrent I/O or enabling an existing tablespace to use Concurrent I/O.

For example for DB2 to mount a file system named /datavol on a mount point named /db2data:

  # /usr/sbin/mount -V vxfs -o cio /dev/vx/dsk/db2dg/datavol \
/db2data
  # /usr/sbin/mount -t vxfs -o cio /dev/vx/dsk/db2dg/datavol \
/db2data

To enable Concurrent I/O on a new SMS container using the namefs -o cio option

  • Using the mountcommand, mount the directory in which you want to put data containers of the SMS tablespaces using the Concurrent I/O feature.
    # /usr/sbin/mount -Vt namefs -o cio /path_name /new_mount_point

    where:

    • /path_name is the directory in which the files that will be using Concurrent I/O reside

    • /new_mount_point is the new target directory that will use the Concurrent I/O feature

The following is an example of mounting a directory (where the new SMS containers are located) to use Concurrent I/O.

To mount an SMS container named /container1 on a mount point named /mysms:

# /usr/sbin/mount -Vt namefs -o cio /datavol/mysms/container1 /mysms

To enable Concurrent I/O on an existing SMS container using the namefs -o cio option

  1. Stop the DB2 instance using the db2stop command.
  2. Make the directory that will have Concurrent I/O turned on available using the mv command.
      # mv /mydb/mysmsdir /mydb/mysmsdir2
  3. Remount /mydb/mysmsdir2 on /mydb/mysmsdir using the mount command with the -o cio option.
      # mount -Vt namefs -o cio /mydb/mysmsdir2 /mydb/mysmsdir
  4. Start the DB2 instance using the db2start command.
    		# db2stop
	# mv /mydb/mysmsdir /mydb/mysmsdir2
	# mount -Vt namefs -o cio /mydb/mysmsdir2 /mydb/mysmsdir
	# db2start

This example shows how to mount a directory for an existing SMS container to use Concurrent I/O.

To enable Concurrent I/O on a DB2 tablespace when creating the tablespace

  1. Use the db2 -v "create regular tablespace..." command with the no file system caching option.
  2. Set all other parameters according to your system requirements.

To enable Concurrent I/O on an existing DB2 tablespace

  • Use the DB2 no file system caching option as follows:
      # db2 -v "alter tablespace tablespace_name no file system caching"

    where tablespace_name is the name of the tablespace for which you are enabling Concurrent I/O.

To verify that Concurrent I/O has been set for a particular DB2 tablespace

  1. Use the DB2 get snapshot option to check for Concurrent I/O.
      # db2 -v "get snapshot for tablespaces on dbname"

    where dbname is the database name.

  2. Find the tablespace you want to check and look for the File system caching attribute. If you see File system caching = No, then Concurrent I/O is enabled.