Compaq ProLiant 7000 Deploying the ProLiant Cluster for NetWare 4.2
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- Compaq ProLiant 7000 | Deploying the ProLiant Cluster for NetWare 4.2 - Page 1
NetWare 4.11 or NetWare 4.2 servers on the network, providing failover support and significant cost savings, since purchasing a dedicated server for failover the need to maintain duplicate files on different servers. • No single point of failure - The new Compaq StorageWorks RAID Array 4000 storage - Compaq ProLiant 7000 | Deploying the ProLiant Cluster for NetWare 4.2 - Page 2
, MultiLock, QuickBlank, QuickLock, UltraView, Innovate logo, Wonder Tools logo in black/white and color, and Compaq PC Card Solution logo are trademarks and/or service marks of Compaq Computer Corporation. Microsoft, Windows, Windows NT, Windows NT Server and Workstation, Microsoft SQL Server for - Compaq ProLiant 7000 | Deploying the ProLiant Cluster for NetWare 4.2 - Page 3
of its users. The following are the leading causes of downtime: • Planned service - In a cluster, a single server can be taken offline, while the other takes on the workload of the downed server. This allows planned service to occur with only minimal interruption to the overall system operation. - Compaq ProLiant 7000 | Deploying the ProLiant Cluster for NetWare 4.2 - Page 4
the measure of how well a computer system can continuously deliver services to clients. This is dependent upon the system's ability to prevent - By reducing downtime, you can eliminate both the high costs of administrative support and, at the same time, the lost revenue caused by downtime and - Compaq ProLiant 7000 | Deploying the ProLiant Cluster for NetWare 4.2 - Page 5
ProLiant Cluster for NetWare 4.2 Overview Novell products are designed to support incremental network growth, and the ProLiant Cluster for NetWare 4.2 network can benefit from the latest Internet/intranet and file and print services in a robust network environment for deploying general-purpose - Compaq ProLiant 7000 | Deploying the ProLiant Cluster for NetWare 4.2 - Page 6
4.2 operates as if it were a completely independent entity on the network. Server A and Server B are allocated their own dedicated volumes on the Compaq RAID Array 4000 shared storage. NHAS controls access for the shared storage and prevents one server from accessing the other server's volume. This - Compaq ProLiant 7000 | Deploying the ProLiant Cluster for NetWare 4.2 - Page 7
on the failed device, and transfer security and license information. NHAS also allows manual failover of shared volumes at any time by pressing F at the NHAS console. only Accessed by Node B only Volume 1 Volume 2 Compaq RAID Array 4000 Disabled Server Fibre Channel Storage Hub Fibre Channel - Compaq ProLiant 7000 | Deploying the ProLiant Cluster for NetWare 4.2 - Page 8
hardware requirements must be met for a ProLiant Cluster for NetWare 4.2 configuration. Compaq ProLiant Servers The primary components of a cluster are the servers. The initial release of the ProLiant Cluster for NetWare 4.2 supports a two-node cluster, where each node is a server. The key software - Compaq ProLiant 7000 | Deploying the ProLiant Cluster for NetWare 4.2 - Page 9
Availability Server requires all shared data to be stored in an external storage system to implement the necessary quorum arbitration. The Compaq RAID Array 4000 storage system brings significant advantages to clustering, including: • 100MB/s throughput • Server-to-hub and hub-to-storage distances - Compaq ProLiant 7000 | Deploying the ProLiant Cluster for NetWare 4.2 - Page 10
Channel Storage Hub 7 and, with the Fibre Channel Storage Hub 12, up to ten Compaq RA4000s are supported. In both cases, two ports on the hubs are used by the server connections. With the Compaq RA4000 connected to both servers through the Fibre Channel Storage Hub, you can independently manage - Compaq ProLiant 7000 | Deploying the ProLiant Cluster for NetWare 4.2 - Page 11
of the Compaq Fibre Channel Array Controller, located within the Fibre Channel Array chassis. The Fibre Channel Array Controller supports RAID 0, Host Controllers, one for each cluster node, are required in your Compaq ProLiant cluster. For higher availability, Fibre Channel Host Controllers can be - Compaq ProLiant 7000 | Deploying the ProLiant Cluster for NetWare 4.2 - Page 12
Backup Path Figure 4. Redundant Fibre Channel Loop As the figure shows, a redundant data path is configured between the cluster servers and the Compaq RAID Array 4000. The redundant components operate initially in standby mode. If any component (host controller, storage hub, array controller, or - Compaq ProLiant 7000 | Deploying the ProLiant Cluster for NetWare 4.2 - Page 13
and management of your clustered servers: • Compaq SmartStart and Support Software CD • Compaq System Configuration Utility • Compaq Insight Manager • Compaq Support Software Diskette for Novell NetWare (Novell SSD) Compaq SmartStart and Support Software CD SmartStart is the intelligent way to - Compaq ProLiant 7000 | Deploying the ProLiant Cluster for NetWare 4.2 - Page 14
are provided for use only with Compaq hardware. For additional details on the features contained in the Novell SSD, visit http://www.compaq.com/support/files/server/softpaqs/Netware/NSSD.html The Compaq SSD for Novell NetWare is included in the Compaq Server Setup and Management pack. 0096 - Compaq ProLiant 7000 | Deploying the ProLiant Cluster for NetWare 4.2 - Page 15
the order listed: CONFIG SCAN FOR NEW DEVICES LIST DEVICES VOLUME • Be sure to install the latest NetWare Support Pack, which is available from Novell, and the Compaq Support Software for Novell NetWare (Novell SSD). • The installation of NHAS requires administrative privileges. • The servers in the - Compaq ProLiant 7000 | Deploying the ProLiant Cluster for NetWare 4.2 - Page 16
operation, press F on the keyboard. Compaq recommends that you pause the NHAS software that you want to manually failover the first server and file to reflect the correct information or reinstall NHAS. • If problems continue, check SYS:\HASERVER\HASERVER.LOG for errors. Contact your local support - Compaq ProLiant 7000 | Deploying the ProLiant Cluster for NetWare 4.2 - Page 17
drives will have already become inaccessible. The volumes will not be mounted on the other server unless all other links fail or a manual failover is invoked. If the problem is in the shared subsystem, then some or all of the shared drives will become inaccessible and one or both servers will be - Compaq ProLiant 7000 | Deploying the ProLiant Cluster for NetWare 4.2 - Page 18
assist you in administering and supporting the ProLiant Cluster for NetWare actual failure that disrupts the server's ability to service client requests. Therefore, the reliability of the Fault Detection and Correction, is available on all Compaq 10/100 Fast Ethernet products. This feature reduces - Compaq ProLiant 7000 | Deploying the ProLiant Cluster for NetWare 4.2 - Page 19
in a .NCF batch file one can configure. Comments are remarked with a "#" sign: # enables duplicate IP addresses support under NetWare set allow ip the NHAS User's Guide is incorrect. See Novell's Errata sheet for the correct layout. This is only a document change. Your HASERVER.INI file should be in - Compaq ProLiant 7000 | Deploying the ProLiant Cluster for NetWare 4.2 - Page 20
the cluster when a failover or recovery happens. Setting this value to manual will disable automatic failback of the volumes should the server that went processes the commands listed here. This specified command should call a file that contains all commands necessary for a successful IP failover. By - Compaq ProLiant 7000 | Deploying the ProLiant Cluster for NetWare 4.2 - Page 21
script, when a server enters into the RECOVERY STATE, i.e. has failed, it processes the commands inputted here. This specified command should call a file that contains all commands necessary for a successful IP failover. By specifying a command or an executable script, when a server enters into the - Compaq ProLiant 7000 | Deploying the ProLiant Cluster for NetWare 4.2 - Page 22
that explain how to implement IP failover between the two servers in the cluster. The script files that follow should be used as a reference when creating your own custom IP failover script files. Scenario IP address of Server A (PL7000-1): 123.45.67.1 with VOL1: on shared disk IP address of Server - Compaq ProLiant 7000 | Deploying the ProLiant Cluster for NetWare 4.2 - Page 23
to all client requests to 123.45.67.11 and, at the same time, removing any secondary IP addresses for the other server. 2. Create a file called CO2.NCF on Server B with the following entries (the lines beginning with # are comments for explanation and clarity): # deletes the other server's secondary - Compaq ProLiant 7000 | Deploying the ProLiant Cluster for NetWare 4.2 - Page 24
A enters the recovery state, this script will have NHAS configure Server A to no longer respond to client requests to 123.45.67.22. 6. Create a file called REC2.NCF on Server A with the following entries (each command is preceded by remarked comments): # adds all secondary IP addresses del secondary - Compaq ProLiant 7000 | Deploying the ProLiant Cluster for NetWare 4.2 - Page 25
we will cause Server A to fail and transfer all network services to Server B. For the purposes of this illustration, cause B will execute the FAIL2.NCF file which will assign Server A's former secondary existing Novell Client32 technology does not support automatic failover drive mappings. A failed - Compaq ProLiant 7000 | Deploying the ProLiant Cluster for NetWare 4.2 - Page 26
and write a document, may not see any problem during a server failure and recovery. Upon failover, trivial compared to the delay and cost of manually swapping in a new server and restoring the in a Failover Novell High Availability Server's support for dynamic user licensing automatically adds the - Compaq ProLiant 7000 | Deploying the ProLiant Cluster for NetWare 4.2 - Page 27
mode. Compaq recommends that the newly mounted volumes must be manually added using one of the Novell cluster. Name space support modules have a .NAM file extension, for example OFF is returned, you can follow the instructions on the screen to enable this option. file, print, or application services. - Compaq ProLiant 7000 | Deploying the ProLiant Cluster for NetWare 4.2 - Page 28
using a failover condition, where all shared volumes are mounted on one server, as the basis. Caching Concerns As a matter related to performance, NetWare uses a file cache to increase server performance. However, when this cache is used and a server fails, information that is contained in the - Compaq ProLiant 7000 | Deploying the ProLiant Cluster for NetWare 4.2 - Page 29
that have not been saved frequently if the server supporting the volume fails? Some client applications may fail when seamlessly reconnect to the clustered service. Both types of connections com/products/clusters/ and http://www.compaq.com/solutions/enterprise/highavailability.html What happens
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,QWHJUDWLRQ±1RWH
September 1999
0096-0699-A
Prepared by ECG Technology
Communications Group
Compaq Computer Corporation
Contents
Clustering Overview
....................
3
Clusters Defined
........................
3
Causes of Downtime
..................
3
Cost of Downtime
.......................
4
Benefits of Clustering
.................
4
Summary
....................................
4
ProLiant Cluster for NetWare
4.2 Overview
.................................
5
Features and Benefits of the
ProLiant Cluster for NetWare
4.2
..............................................
5
Novell’s High-Reliability
Solution
......................................
5
The Failover Process
.................
6
Hardware Requirements
............
8
Compaq ProLiant Servers
..........
8
Compaq StorageWorks
RAID Array 4000 Storage
System
.......................................
9
Cluster Interconnects
...............
12
Software Components
...............
13
Novell Software
........................
13
Compaq Software
....................
13
Planning Novell High
Availability Server
Installation
..................................
15
Verification of NHAS
Installation
................................
15
ProLiant Cluster for NetWare
4.2 Administration
.....................
18
Increasing Availability
...............
18
IP and Applications Failover
.....
18
Management
............................
26
Technical FAQs
.........................
28
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IRU±1HW:DUH±²³´
Abstract:
Compaq is renowned in the Enterprise market with its industry-
leading, highly available, fault-tolerant servers. Compaq servers and storage
deliver on this reputation by offering the highest level of reliability and
uptime with features such as:
•
Industry standard PCI Hot Plug and internal hot-plug storage
•
Redundant hot-plug fans, power supplies, and NICs
•
Automatic Server Recovery-2 (ASR-2)
•
ECC protected memory
•
Integrated Management Display (IMD)
•
Integrated Remote Console (IRC)
•
Compaq SmartStart and Compaq Insight Manager
The Compaq ProLiant Cluster for NetWare 4.2 is designed to help
customers reduce the risk and costs of downtime due to hardware or
software failures.
Benefits include:
•
Automatic failover protection - In the event of a failure on one server,
the remaining server maintains availability of network data and
resources.
•
Active servers - Users can now cluster two active NetWare 4.11 or
NetWare 4.2 servers on the network, providing failover support and
significant cost savings, since purchasing a dedicated server for failover
is no longer necessary.
•
Shared storage - Support for shared storage devices allows customers to
reduce overall management costs by centralizing administration and
back-up. Shared storage also allows more efficient use of storage space
by eliminating the need to maintain duplicate files on different servers.
•
No single point of failure – The new Compaq StorageWorks RAID
Array 4000 storage system provides redundant fibre channel loops for
No Single Point of Failure configurations.
The ProLiant Cluster for NetWare 4.2 provides the highest levels of system
and application availability for customers with high system uptime
requirements for NetWare 4.x environments. These levels are necessary to
meet the requirements of demanding business-critical environments. This
Integration Note details the configuration options and server requirements,
provides insight into the administration, and describes some of the features
available with the ProLiant Cluster for NetWare 4.2.