17.2.4 Storage configuration

(1) Host's local file system

The directories to be placed in the host's local file system are as follows:

• Server directory

  To create a server directory, use the adbinstall command.

  Important

  Create a server directory on both the active and standby systems. Do not create a server directory on the shared disk (host switchover target file system) or in a shared file system.

• Output-directory for common format audit trails

  For details about the output-directory for common format audit trails, see 2.18.9 Conversion of audit trail information (linkage with JP1/Audit Management - Manager).

In Figure 17‒1: Example of a system configuration using the cold standby configuration, LOC001 and LOC002 are the host's local file systems.

• LOC001

  Local file system of server machine hadb01 (active system)

• LOC002

  Local file system of server machine hadb02 (standby system)

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(2) File systems subject to host switchover processing

The following file systems are subject to host switchover processing:

• File system that stores the DB directory

• File system that stores temporary work files

• File system that stores synonym dictionary files

• File system where the audit trail directory will be created

Create a file system subject to host switchover processing on an LV in a VG that consists of disks (shared disks) that can be referenced from both the active system and the standby system. For details about shared disks, see Shared disk configuration in the manual HA Monitor for Linux^(R) (x86).

Note

For details about how to create the DB directory, see 17.3.7 Creating a database.

In Figure 17‒1: Example of a system configuration using the cold standby configuration, FS001 to FS004 are the file systems inherited at host switchover.

• FS001

  File system that stores the DB directory

  In this example, the name of the VG is vg_hadb01 and the name of the LV is hadb_db.

• FS002

  File system that stores temporary work files

  In this example, the name of the VG is vg_hadb02 and the name of the LV is hadb_workarea.

• FS003

  File system that stores synonym dictionary files

  In this example, the name of the VG is vg_hadb03, and the name of the LV is hadb_syndict.

  The file system that stores synonym dictionary files is needed to perform synonym searches.

• FS004

  File system where the audit trail directory will be created

  In this example, the name of the VG is vg_hadb04 and the name of the LV is hadb_audit.

  The file system where the audit trail directory will be created is needed when the audit trail facility is used.

Important

When using SCSI reservation for shared disk, make sure that disks on which file systems subject to host switchover processing have been created are subject to SCSI reservation processing. Do not create any area other than a file system subject to host switchover processing on a disk subject to SCSI reservation processing.

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(3) Shared file system

The following file system is placed on a shared file system:

• File system for storing input data files that are used for data import

• File system for storing CSV files used by the ADB_CSVREAD function

• File system where audit trail storage directory will be created

Configure the shared file system on a disk (shared disk) that can be referenced from both the active system and the standby system, and mount the shared file system in a directory with the same path in both the active system and the standby system. For details about shared disks, see Shared disk configuration in the manual HA Monitor for Linux^(R) (x86).

In Figure 17‒1: Example of a system configuration using the cold standby configuration, FS005 is the shared file system.

• FS005

  File system for storing input data files for data import, file system for storing CSV files, and file system for storing the audit trail storage directory

For the shared file system, you can use, for example, an NFS, which is a distributed file system.

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(4) Disks for DB area files

Provide a disk for each DB area file.

For the DB area files listed below, allocate a block special file.

• Master directory DB area file

• Dictionary DB area file

• System-table DB area file

• Data DB area file

Ensure that the disks for the following DB area files can be referenced from both the active system and the standby system:

• Master directory DB area file

• Dictionary DB area file

• System-table DB area file

• Data DB area file

• Work table DB area file

Important

When using SCSI reservation for shared disk, configure the disks that store the preceding DB area files as subject to SCSI reservation.

In Figure 17‒1: Example of a system configuration using the cold standby configuration, LU001 to LU005 and WRK001 are the disks for DB area files.

• LU001

  DB area disk that comprises a dictionary DB area

• LU002

  DB area disk that comprises a master directory DB area

• LU003

  DB area disk that comprises a system-table DB area

• LU004

  DB area disk that comprises a data DB area (ADBUTBL01)

• LU005

  DB area disk that comprises a data DB area (ADBUIDX01)

• WRK001

  DB area disk that comprises a work table DB area (ADBWRK)

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