Compaq ProLiant 1850R Modifiers Manual
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Compaq ProLiant 1850R Modifiers Manual

Compaq ProLiant 1850R Modifiers Manual

Modifying physical cluster resources in a compaq parallel database cluster
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Download this manual See also: Configuration Manual, Manual
White Paper
December 1998
ECG001/1298
Prepared by High Availability
Products Group
Compaq Computer Corporation
Contents
Ordering .....................................3
Symptoms ................................3
occur? ......................................3
Preventing the Issue .................4
Issue ........................................4
Affected? ..................................4
Array ...........................................8
Array ...........................................9
Storage Capacity ....................12
Modifying Physical Cluster
Resources in a Compaq Parallel
Database Cluster
Abstract: At some time during the life of a Compaq Parallel
Database Cluster it is likely that some modifications to the physical
resources of the cluster will be required. This paper describes how to
perform some of the more likely modifications, such as:
Managing Changes to Drive Ordering
Removing a Shared Storage Array
Adding a Shared Storage Array
Adding or Removing Shared Storage Drives
Additional scenarios are described in Chapter 5 of the Compaq
Parallel Database Cluster Administrator Guide.

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  • Page 1: Table Of Contents

    Products Group Database Cluster Compaq Computer Corporation Contents Abstract: At some time during the life of a Compaq Parallel Managing Changes to Drive Database Cluster it is likely that some modifications to the physical Ordering ........3 resources of the cluster will be required. This paper describes how to Symptoms ........3...
  • Page 2 PROFITS, BUSINESS INTERRUPTION OR LOSS OF BUSINESS INFORMATION), EVEN IF COMPAQ HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. The limited warranties for Compaq products are exclusively set forth in the documentation accompanying such products. Nothing herein should be construed as constituting a further or additional warranty.

  • Page 3: Managing Changes To Drive Ordering

    Modifying Physical Cluster Resources in a Compaq Parallel Database Cluster Managing Changes to Drive Ordering The Compaq Parallel Database Cluster encounters difficulties when the order in which drives are brought online changes. For the drives associated with the fibre channel arrays, NT assigns disk numbers based on the order in which the arrays are powered on.

  • Page 4: Preventing The Issue

    Modifying Physical Cluster Resources in a Compaq Parallel Database Cluster When an existing array is removed from the cluster’s shared storage, if the array was not the last one brought online, the order of the drives will change for all cluster nodes.
  • Page 5 Modifying Physical Cluster Resources in a Compaq Parallel Database Cluster Node1 represents the drives in the first array as Harddisk2, Harddisk3, and Harddisk4, while Node2 represents them as Harddisk1, Harddisk2, and Harddisk3. Thus, the configuration of the cluster as seen by disk administrator is:...
  • Page 6 Modifying Physical Cluster Resources in a Compaq Parallel Database Cluster What happens when the drive numbering order changes? When the numbers associated with the shared drives change the symbolic link table files are no longer correct. Each of these files must be modified to reflect the changes in disk structure.
  • Page 7 Modifying Physical Cluster Resources in a Compaq Parallel Database Cluster A symbolic link worksheet corresponding to the above configuration is in the following table. Note that paritition1 on each disk is used for the small, identifiable partitions discussed in the Simplifying Detection of the Issue section above;...

  • Page 8: Removing A Shared Storage Array

    Modifying Physical Cluster Resources in a Compaq Parallel Database Cluster Removing a Shared Storage Array Each cluster node, and the cluster as a whole, depends on the shared storage for the Oracle database, Oracle data logs, and possibly application program files. If the shared storage array is removed, all clustered applications that are dependent on that array will be unable to operate properly.

  • Page 9: Adding A Shared Storage Array

    7. Boot the primary cluster node and start Windows NT. 8. Log on and run the Compaq Array Configuration Utility to create the desired RAID logical drives and to configure them with the desired RAID level.
  • Page 10 If not, you will need to troubleshoot the problem as to why the expected order does not exist. See the troubleshooting section in the Compaq Parallel Database Cluster Administrator Guide for troubleshooting suggestions.

  • Page 11: Adding Or Removing Drives From A Shared Storage Array

    Modifying Physical Cluster Resources in a Compaq Parallel Database Cluster Adding or Removing Drives from a Shared Storage Array Two distinct situations exist in which you might add or remove drives from a shared storage array: When one of the drives fails. In this case, you are simply exchanging the failed drive for a new one.

  • Page 12: Adding A Drive To Increase Storage Capacity

    Compaq Fibre Channel Storage System and how to allocate it to Oracle8 Parallel Server. 1. Physically add the drive(s) to the fibre channel array. 2. Run the Compaq Array Configuration Utility to create the desired RAID logical drives and to configure them with the desired RAID level.

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