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Oracle® Fusion Middleware Enterprise Deployment Guide for Oracle SOA Suite
11g Release 1 (11.1.1.7.0)

Part Number E12036-12
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4 Preparing the File System for an Enterprise Deployment

This chapter describes how to prepare your file system for an Oracle SOA enterprise deployment. It provides information about recommended directory structure and locations, and includes a procedure for configuring shared storage.

This chapter includes the following topics:

4.1 Overview of Preparing the File System for Enterprise Deployment

It is important to set up your file system in a way that makes the enterprise deployment easier to understand, configure, and manage. Oracle recommends setting up your files system according to information in this chapter. The terminology defined in this chapter is used in diagrams and procedures throughout the guide.

Use this chapter as a reference to help understand the directory variables used in the installation and configuration procedures. Other directory layouts are possible and supported, but the model adopted in this guide is chosen for maximum availability, providing both the best isolation of components and symmetry in the configuration and facilitating backup and disaster recovery. The rest of the document uses this directory structure and directory terminology.

4.2 Terminology for Directories and Directory Environment Variables

This section describes the directory environment variables used throughout this guide for configuring the Oracle SOA enterprise deployment. The following directory variables are used to describe the directories installed and configured in the guide:

Tip:

You can simplify directory navigation by using environment variables as shortcuts to the locations in this section. For example, you could use an environment variable called $ORACLE_BASE in Linux to refer to /u01/app/oracle (that is, the recommended ORACLE_BASE location). In Windows, you would use %ORACLE_BASE% and use Windows-specific commands.

4.3 About Recommended Locations for the Different Directories

The following sections describe some basic recommendations for using shared storage for an enterprise deployment topology:

4.3.1 Shared Storage Recommendations for Binary (Oracle Home) Directories

The following sections describe guidelines for using shared storage for your Oracle Fusion Middleware Oracle home directories:

4.3.1.1 About the Binary (Oracle Home) Directories

When you install any Oracle Fusion Middleware product, you install the product binaries into an Oracle home. The binary files installed in the Oracle home are read-only and remain unchanged unless the Oracle home is patched or upgraded to a newer version.

In a typical production environment, the Oracle home files are saved in a separate location from the domain configuration files, which you create using the Oracle Fusion Middleware Configuration Wizard.

The Middleware home for an Oracle Fusion Middleware installation contains the binaries for Oracle WebLogic Server, the Oracle Fusion Middleware infrastructure files, and any Oracle Fusion Middleware product-specific directories.

For more information about the structure and contents of an Oracle Fusion Middleware Oracle home, see Oracle Fusion Middleware Concepts.

4.3.1.2 About Sharing a Single Oracle Home for Multiple Domains

Oracle Fusion Middleware enables you to configure multiple Oracle WebLogic Server domains from a single Oracle home. This allows you to install the Oracle home in a single location on a shared volume and reuse the Oracle home for multiple hosts installations.

When an Oracle home is shared by multiple servers on different hosts, there are some best practices to keep in mind. In particular, be sure that the Oracle Inventory (oraInventory) on each host is updated for consistency and for the application of patches.

To update the oraInventory for a host and attach an Oracle home on shared storage, use the following command:

ORACLE_HOME/oui/bin/attachHome.sh

For more information about the oraInventory, see "Oracle Universal Installer Inventory" in the Oracle Universal Installer Concepts Guide.

4.3.1.3 About Using Redundant Binary (Oracle Home) Directories

For maximum availability, Oracle recommends using redundant binary installations on shared storage.

In this model, you install two identical Oracle homes for your Oracle Fusion Middleware software on two different shared volumes. You then mount one of the Oracle homes to one set of servers, and the other Oracle home to the remaining servers. Each Oracle home has the same mount point, so the Oracle home always has the same path, regardless of which Oracle home the server is using.

Should one Oracle home become corrupted or unavailable, only half your servers are affected. For additional protection, Oracle recommends that you disk mirror these volumes.

If separate volumes are not available on shared storage, Oracle recommends simulating separate volumes using different directories within the same volume and mounting these to the same mount location on the host side. Although this does not guarantee the protection that multiple volumes provide, it does allow protection from user deletions and individual file corruption.

4.3.2 Shared Storage Recommendations for Domain Configuration Files

The following sections describe guidelines for using shared storage for the Oracle WebLogic Server domain configuration files you create when you configure your Oracle Fusion Middleware products in an enterprise deployment:

4.3.2.1 About Oracle WebLogic Server Administration and Managed Server Domain Configuration Files

When you configure an Oracle Fusion Middleware product, you create or extend an Oracle WebLogic Server domain. Each Oracle WebLogic Server domain consists of a single Administration Server and one or more managed servers.

For more information about Oracle WebLogic Server domains, see Oracle Fusion Middleware Understanding Domain Configuration for Oracle WebLogic Server.

In an enterprise deployment, it is important to understand that the managed servers in a domain can be configured for active-active high availability. However, the Administration server cannot. The Administration Server is a singleton service. That is, it can be active on only one host at any given time.

4.3.2.2 Local Storage Requirements for Managed Server Domain Configuration Files

Managed Server configuration Files should reside on local storage to prevent performance issues associated with contention. The directory is known as the MSERVER_HOME directory. It is highly recommended that managed server domain configuration files be placed onto local storage.

If you must use shared storage, it is recommended that you create a storage partition for each node and mount that storage exclusively to that node.

The configuration steps provided for this enterprise deployment topology assume that a local domain directory for each node is used for each managed server.

4.3.3 Shared Storage Recommendations for JMS File Stores and Transaction Logs

JMS file stores and JTA transaction logs must be placed on shared storage in order to ensure that they are available from multiple hosts for recovery in the case of a server failure or migration.

For more information about saving JMS and JTA information in a file store, see "Using the WebLogic Persistent Store" in Administering Server Environments for Oracle WebLogic Server.

4.3.4 Recommended Directory Locations

This section describes the directories recommended. Wherever a shared storage location is directly specified, it is implied that shared storage is required for that directory. When using local disk or shared storage is optional the mount specification is qualified with "if using a shared disk." The shared storage locations are examples and can be changed as long as the provided mount points are used. However, Oracle recommends this structure in the shared storage device for consistency and simplicity.

ORACLE_BASE

Recommended directory: /u01/app/oracle

Domain Directory for Administration Server Domain Directory:

ORACLE_BASE/admin/domain_name/aserver/domain_name (The last ”domain_name” is added by Configuration Wizard)

  • Mount point on machine: ORACLE_BASE/admin/domain_name/aserver

  • Shared storage location: ORACLE_BASE/admin/domain_name/aserver

  • Mounted from: Only the node where the Administration Server is running needs to mount this directory. When the Administration Server is relocated (failed over) to a different node, the node then mounts the same shared storage location on the same mount point. The remaining nodes in the topology do not need to mount this location.

Domain Directory for Managed Server Domain Directory:

ORACLE_BASE/admin/domain_name/mserver/domain_name

  • If you are using a shared disk, the mount point on the machine is:

    ORACLE_BASE/admin/domain_name/mserver
    

    Mounted to:

    /ORACLE_BASE/admin/domain_name/Noden/mserver/
    

    (each node uses a different domain directory for managed servers).

Note:

This procedure is really shared storage dependent. The above example is specific to NAS, but other storage types may provide this redundancy with different types of mappings.

Location for JMS file-based stores and Tlogs (SOA only):

ORACLE_BASE/admin/domain_name/soa_cluster_name/jms

ORACLE_BASE/admin/domain_name/soa_cluster_name/tlogs

  • Mount point: ORACLE_BASE/admin/domain_name/soa_cluster_name/

  • Shared storage location: ORACLE_BASE/admin/domain_name/soa_cluster_name/

  • Mounted from: All nodes running SOA or BAM must mount this shared storage location so that transaction logs and JMS stores are available when server migration to another node take place.

Location for Application Directory for the Administration Server

ORACLE_BASE/admin/domain_name/aserver/applications

  • Mount point: ORACLE_BASE/admin/domain_name/aserver/

  • Shared storage location: ORACLE_BASE/admin/domain_name/aserver

  • Mounted from: Only the node where the Administration Server is running must mount this directory. When the Administration Server is relocated (failed over) to a different node, the node then mounts the same shared storage location on the same mount point. The remaining nodes in the topology do not need to mount this location

Location for Application Directory for Managed Server

ORACLE_BASE/admin/domain_name/mserver/applications

This directory is local in the context of a SOA enterprise deployment.

MW_HOME (application tier)

Recommended directory: ORACLE_BASE/product/fmw

  • Mount point: ORACLE_BASE/product/fmw

  • Shared storage location: ORACLE_BASE/product/fmw (VOL1 and VOL2)

    Note:

    When there is just one volume available in the shared storage, you can provide redundancy using different directories to protect from accidental file deletions and for patching purposes. Two MW_HOMEs would be available; at least one at ORACLE_BASE/product/fmw1, and another at ORACLE_BASE/product/fmw2. These MW_HOMEs are mounted on the same mount point in all nodes.

  • Mounted from: Nodes alternatively mount VOL1 or VOL2 so that at least half of the nodes use one installation, and half use the other.

    In a SOA Enterprise Deployment topology, SOAHOST1 mounts VOL1 and SOAHOST2 mounts VOL2. When only one volume is available, nodes mount the two suggested directories in shared storage alternately. For example, SOAHOST1 would use ORACLE_BASE/product/fmw1 as a shared storage location, and SOAHOST2 would use ORACLE_BASE/product/fmw2 as a shared storage location)

ORACLE_HOME (web tier)

Recommended directory: ORACLE_BASE/product/fmw/web

  • Mount point: ORACLE_BASE/product/fmw

  • Shared storage location: ORACLE_BASE/product/fmw (VOL1 and VOL2)

    Note:

    Web Tier installation is typically performed on local storage to the WEBHOST nodes. When using shared storage, consider the appropriate security restrictions for access to the storage device across tiers.

    This enterprise deployment guide assumes that the Oracle Web Tier will be installed onto local disk. You may install the Oracle Web Tier binaries (and the ORACLE_INSTANCE) onto shared disk. If so, the shared disk MUST be separate from the shared disk used for the application tier.

  • Mounted from: For Shared Storage installations, nodes alternatively mount VOL1 or VOL2 so that at least half of the nodes use one installation, and half use the other.

    In a SOA Enterprise Deployment topology, WEBHOST1 mounts VOL1 and WEBHOST2 mounts VOL2. When only one volume is available, nodes mount the two suggested directories in shared storage alternately. For example, WEBHOST1 would use ORACLE_BASE/product/fmw1 as a shared storage location, and WEBHOST2 would use ORACLE_BASE/product/fmw2 as a shared storage location).

WL_HOME

Recommended directory: MW_HOME/wlserver_10.3

ORACLE_HOME

Recommended directory: MW_HOME/soa

ORACLE_COMMON_HOME

Recommended directory: MW_HOME/oracle_common

ORACLE_HOME_OSB

Recommended directory: /MW_HOME/osb

ORACLE_INSTANCE (OHS Instance)

Recommended directory: ORACLE_BASE/admin/instance_name

  • If you are using a shared disk, the mount point on the machine is:

    ORACLE_BASE/admin/instance_name
    

    Mounted to:

    ORACLE_BASE/admin/instance_name vol1
    

    Note:

    (VOL1) is optional; you could also use (VOL2).

4.3.5 Directory Structure and Configurations

This section provides diagrams and to help illustrate the recommended directory structure and shared storage.

Figure 4-1 illustrates the directory structure

Figure 4-1 Directory Structure

Description of Figure 4-1 follows
Description of "Figure 4-1 Directory Structure"

The directory structure in Figure 4-1 does not show other required internal directories, such as oracle_common and jrockit.

Table 4-1 explains what the various color-coded elements in the diagram mean.

Table 4-1 Directory Structure Elements

Element Explanation

Admin Server element

The Administration Server domain directories, applications, deployment plans, file adapter control directory, JMS and TX logs, and the entire MW_HOME are on a shared disk.

Managed server elements

The managed server domain directories can be on a local disk or a shared disk. Further, if you want to share the managed server domain directories on multiple nodes, then you must mount the same shared disk location across the nodes. The instance_name directory for the web tier can be on a local disk or a shared disk.

Fixed name element

Fixed name.

Installation-dependent names

Installation-dependent name.


Figure 4-2 shows an example configuration for shared storage with multiple volumes for SOA. This can be extrapolated with the same structure for BAM deployments.

Figure 4-2 Example Configuration for Shared Storage

Shared storage, explained in table following image.

Table 4-2 summarizes the directory structure for the domain.

Table 4-2 Contents of Shared Storage

Server Type of Data Volume in Shared Storage Directory Files

WLS_SOA1

Tx Logs

VOL1

ORACLE_BASE/admin/domain_name/soa_cluster_name/tlogs

The transaction directory is common (decided by WebLogic Server), but the files are separate.

WLS_SOA2

Tx Logs

VOL1

ORACLE_BASE/admin/domain_name/soa_cluster_name/tlogs

The transaction directory is common (decided by WebLogic Server), but the files are separate.

WLS_SOA1

JMS Stores

VOL1

ORACLE_BASE/admin/domain_name/soa_cluster_name/jms

The transaction directory is common (decided by WebLogic Server), but the files are separate; for example: SOAJMSStore1, UMSJMSStore1, and so on.

WLS_SOA2

JMS Stores

VOL1

ORACLE_BASE/admin/domain_name/soa_cluster_name/jms

The transaction directory is common (decided by WebLogic Server), but the files are separate; for example: SOAJMSStore2, UMSJMSStore2, etc.

WLS_SOA1

WLS Install

VOL1

MW_HOME

Individual in each volume, but both servers see same directory structure.

WLS_SOA2

WLS Install

VOL2

MW_HOME

Individual in each volume, but both servers see same directory structure.

WLS_SOA1

SOA Install

VOL1

MW_HOME/soa

Individual in each volume, but both servers see same directory structure.

WLS_SOA2

SOA Install

VOL2

MW_HOME/soa

Individual in each volume, but both servers see same directory structure.

WLS_SOA1

Domain Config

VOL1

ORACLE_BASE/admin/domain_name/mserver/domain_name

For configurations where managed server domain directory is located in shared storage, the files would be individual in each volume, but both servers see the same directory structure. In this guide, local storage is used for managed server domain directories.

WLS_SOA2

Domain Config

VOL2

ORACLE_BASE/admin/domain_name/mserver/domain_name

Individual in each volume, but both servers see same directory structure.

WLS_SOA1

Domain Config

VOL1

ORACLE_BASE/admin/domain_name/aserver/domain_name

Used by only one Server where the Administration server is running.


4.4 Configuring Shared Storage

Use the following commands to create and mount shared storage locations so that SOAHOST1 and SOAHOST2 can see the same location for binary installation in two separate volumes.

Note:

The user ID used to create a shared storage file system owns and has read, write, and execute privileges for those files. Other users in the operating system group can read and execute the files, but they do not have write privileges. For more information about installation and configuration privileges, see the "Understanding Installation and Configuration Privileges and Users" section in the Oracle Fusion Middleware Installation Planning Guide.

"nasfiler" is the shared storage filer.

From SOAHOST1:

mount nasfiler:/vol/vol1/ORACLE_BASE/product/fmw
ORACLE_BASE/product/fmw -t nfs

From SOAHOST2:

mount nasfiler:/vol/vol2/ORACLE_BASE/product/fmw
ORACLE_BASE/product/fmw -t nfs

If only one volume is available, you can provide redundancy for the binaries by using two different directories in the shared storage and mounting them to the same directory in the SOA Servers:

From SOAHOST1:

mount nasfiler:/vol/vol1/ORACLE_BASE/product/fmw1
ORACLE_BASE/product/fmw -t nfs

From SOAHOST2:

mount nasfiler:/vol/vol1/ORACLE_BASE/product/fmw2
ORACLE_BASE/product/fmw -t nfs

The following commands show how to share the SOA TX logs location across different nodes:

mount nasfiler:/vol/vol1/ORACLE_BASE/stores/soadomain/soa_cluster/tlogs
/ORACLE_BASE/stores/soadomain/soa_cluster/tlogs -t nfs

mount nasfiler:/vol/vol1/ORACLE_BASE/stores/soadomain/soa_cluster/tlogs
/ORACLE_BASE/stores/soadomain/soa_cluster/tlogs -t nfs

Validating the Shared Storage Configuration

Ensure that you can read and write files to the newly mounted directories by creating a test file in the shared storage location you just configured.

For example:

$ cd newly mounted directory
$ touch testfile

Verify that the owner and permissions are correct:

$ ls -l testfile

Then remove the file:

$ rm testfile

Note:

The shared storage can be a NAS or SAN device. The following illustrates an example of creating storage for a NAS device from SOAHOST1. The options may differ depending on the specific storage device.

mount nasfiler:/vol/vol1/fmw11shared ORACLE_BASE/wls -t nfs -o rw,bg,hard,nointr,tcp,vers=3,timeo=300,rsize=32768,wsize=32768

Contact your storage vendor and machine administrator for the correct options for your environment.