Compaq 1850R Deploying the ProLiant Cluster for NetWare 4.2
Compaq 1850R - ProLiant - 128 MB RAM Manual
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- Compaq 1850R | Deploying the ProLiant Cluster for NetWare 4.2 - Page 1
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 - Compaq 1850R | Deploying the ProLiant Cluster for NetWare 4.2 - Page 2
intraNetWare, NDS, Novell Directory Services, and High Availability Server (NHAS) are trademarks of Novell, Inc. Pentium is a registered trademark of Intel Corporation. Copyright ©1999 Compaq Computer Corporation. All rights reserved. Printed in the U.S.A. Deploying the ProLiant Cluster for NetWare - Compaq 1850R | Deploying the ProLiant Cluster for NetWare 4.2 - Page 3
identities, tasks and users may be distributed easily between the distinct servers. With the focus for clustered systems being reliability, the ProLiant Cluster for NetWare 4.2 delivers again with automatic failover of all network resources and responsibilities in the event of a failure. Should one - Compaq 1850R | Deploying the ProLiant Cluster for NetWare 4.2 - Page 4
driving force behind the high-availability systems specific application systems Server can eliminate your concerns and ease your tightening networking budget through • Availability - Simply defined, availability is the measure of how well a computer system can continuously deliver services support - Compaq 1850R | Deploying the ProLiant Cluster for NetWare 4.2 - Page 5
Novell Directory Services (NDS) support − NetWare Loadable Module™ (NLM™)-based installation − Dynamic user licensing − Application fallback via IP Novell's High-Reliability Solution The ProLiant Cluster for NetWare 4.2, featuring Novell High Availability Server (NHAS), increases network reliability - Compaq 1850R | Deploying the ProLiant Cluster for NetWare 4.2 - Page 6
The Failover Process Costandby State During normal operation, shown in Figure 1, each server node in the ProLiant Cluster for NetWare 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 - Compaq 1850R | Deploying the ProLiant Cluster for NetWare 4.2 - Page 7
. By forcing a failover, you can remove a server from the network for scheduled maintenance without interrupting access to that server's volumes. Accessed by Node B only Accessed by Node B only Volume 1 Volume 2 Compaq RAID Array 4000 Disabled Server Fibre Channel Storage Hub Fibre Channel - Compaq 1850R | Deploying the ProLiant Cluster for NetWare 4.2 - Page 8
Host Controllers, a Fibre Channel Storage Hub, and a Compaq RAID Array 4000 storage system with a Fibre Channel Array Controller. ProLiant Server Fibre Channel Host Controller CompaqFRibAreIDChAarnranyel4A0r0ra0y Network Interface Controller (Dedicated Interconnect) Fibre Channel Storage Hub - Compaq 1850R | Deploying the ProLiant Cluster for NetWare 4.2 - Page 9
computing. Compaq StorageWorks RAID Array 4000 Storage System The ProLiant Cluster for NetWare 4.2 is based on a cluster architecture known as Shared Storage Clustering, in which clustered servers share access to a common set of hard drives. Novell High Availability Server requires all - Compaq 1850R | Deploying the ProLiant Cluster for NetWare 4.2 - Page 10
chassis that contains the disk drives, power supply, and Fibre Channel Array Controller. The Fibre Channel Array can hold twelve 1-inch or eight 1.6-inch Wide-Ultra SCSI-3 drives. The Compaq Fibre Channel Array comes in both a rack and a tower model. Each ProLiant Cluster for NetWare 4.2 must have - Compaq 1850R | Deploying the ProLiant Cluster for NetWare 4.2 - Page 11
is an integrated part of the Compaq Fibre Channel Array Controller, located within the Fibre Channel Array chassis. The Fibre Channel Array Controller supports RAID 0, 1, 4, and 5, as well as online capacity expansion and pre-failure notification for hard drives. In addition, the Fibre Channel Array - Compaq 1850R | Deploying the ProLiant Cluster for NetWare 4.2 - Page 12
, a redundant data path is configured between the cluster servers and the Compaq RAID Array 4000. The redundant components operate initially in is termed intra-cluster communication. The ProLiant Cluster for NetWare 4.2 uses the standard public network controller card (NetWare Link), an optional - Compaq 1850R | Deploying the ProLiant Cluster for NetWare 4.2 - Page 13
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 configure your Compaq ProLiant Server - Compaq 1850R | Deploying the ProLiant Cluster for NetWare 4.2 - Page 14
see the Compaq Server Setup and Management pack. Compaq Support Software Diskettes for Novell NetWare (Novell SSD) The Compaq SSD for Novell NetWare contains device drivers and utilities that enable you to take advantage of specific capabilities offered on Compaq products. The drivers and utilities - Compaq 1850R | Deploying the ProLiant Cluster for NetWare 4.2 - Page 15
server in the cluster must have an internal hard drive that is not part of the shared subsystem. If NetWare is installed with the shared drive subsystem proper NHAS installation on both NHAS servers. • After the NHAS installation, restart your Compaq ProLiant server. NHAS should load, and you - Compaq 1850R | Deploying the ProLiant Cluster for NetWare 4.2 - Page 16
. Any shared volumes are dismounted and any shared drives are released. If you want to failover the system, press F on the second server, which will force first server into the RECOVERY state. • If the failover was unsuccessful, check the network configuration and verify that it is properly set up - Compaq 1850R | Deploying the ProLiant Cluster for NetWare 4.2 - Page 17
. 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 disarmed. A Disk Link failure alone will not - Compaq 1850R | Deploying the ProLiant Cluster for NetWare 4.2 - Page 18
the failover process. Obviously, this condition is only acceptable in the event of an actual failure that disrupts the server's ability to service client requests. Therefore, the reliability of the connections between the servers in the cluster is a direct measure of the clustered system's ability - Compaq 1850R | Deploying the ProLiant Cluster for NetWare 4.2 - Page 19
server fails. The ADD command assigns the IP address to the surviving server in the event of a failover. The DEL command removes the IP address from the server support under server node, such as SYS:\SYSTEM. Each server User's Guide is incorrect. See specifically to your requirements. Below is a sample - Compaq 1850R | Deploying the ProLiant Cluster for NetWare 4.2 - Page 20
network message informing users the status of the servers in the cluster when a failover or recovery happens. Setting this value to manual will disable automatic failback of the volumes should the server , when a server enters the RECOVERY STATE, i.e. has failed, it processes the commands listed - Compaq 1850R | Deploying the ProLiant Cluster for NetWare 4.2 - Page 21
mounting this volume. This value derive from the partition time stamp NetWare creates and is used to recognize volumes for NHAS. By specifying a command or an executable script, when a server mounts this particular volume, it processes the commands inputted here. By specifying a command or - Compaq 1850R | Deploying the ProLiant Cluster for NetWare 4.2 - Page 22
mounting this volume. This value, derived from the partition time stamp NetWare creates, is used to recognize volumes for NHAS. By specifying a command or an executable script, when a server dismounts this particular volume, it processes the commands inputted here. By specifying a command or - Compaq 1850R | Deploying the ProLiant Cluster for NetWare 4.2 - Page 23
file, HASERVER.INI, in the SYS:\SYSTEM directory. Whenever a server goes into the costandby state, this script will configure the server to respond 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 - Compaq 1850R | Deploying the ProLiant Cluster for NetWare 4.2 - Page 24
.PL7000-2], as shown below: RecoveryCommand=REC1.NCF Save this file, HASERVER.INI, in the SYS:\SYSTEM directory. Whenever Server 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 - Compaq 1850R | Deploying the ProLiant Cluster for NetWare 4.2 - Page 25
server, though, will be broken. The existing Novell Client32 technology does not support automatic failover drive mappings. A failed-over shared drive can be re-mapped in Windows by using Windows Explorer as follows: 1. Right click on the Start button. 2. Select Explore. 3. Select Map Network Drive - Compaq 1850R | Deploying the ProLiant Cluster for NetWare 4.2 - Page 26
Any server applications accessing the shared drives after a failover must be started on the surviving server as described above, and any network drives will word processing applications where the server is accessed only to read and write a document, may not see any problem during a server failure - Compaq 1850R | Deploying the ProLiant Cluster for NetWare 4.2 - Page 27
as soon as Server A has resumed network communication, NHAS forces Server A into recovery mode and dismounts Server A's volumes. When the failover process has completed, NHAS will initiate the restoration of Server A and place both servers in costandby mode. Compaq recommends that system integrators - Compaq 1850R | Deploying the ProLiant Cluster for NetWare 4.2 - Page 28
a twist to system requirements. Specifically, the optimal amount of RAM that should be installed in each clustered server will vary drastically internal drive(s), size of all shared volumes, the applications and name spaces loaded, number of users, etc. A good reference article on server memory - Compaq 1850R | Deploying the ProLiant Cluster for NetWare 4.2 - Page 29
saved frequently if the server supporting the volume fails? Some service. Both types of connections can use the NetWare Application Launcher to restart any server compaq.com/solutions/enterprise/highavailability.html What happens to printer jobs when a system running Novell High Availability Server
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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.