README before using the Veritas Storage Foundation™ 5.
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Contents Preface........................................................................................................4 Publishing History.....................................................................................................................4 1 Overview..................................................................................................5 SG SMS Bundles Do Not Include VCS.........................................................................................
Preface This README before using the Veritas Storage Foundation™ 5.1 SP1 Cluster File System Administrator's Guide contains important information about Veritas CFS and CVM when they are included in an HP Serviceguard Storage Management Suite Version A.04.00 bundle. This information IS NOT included in the Veritas Storage Foundation™ 5.1 SP1 Cluster File System Administrator's Guide. Publishing History The latest publishing date and part number indicate the current edition.
1 Overview The information in this README applies to the following SG SMS Version A.04.00 bundles that include the Veritas Storage Foundation™ 5.1 SP1 Cluster File System (CFS) and Cluster Volume Manager (CVM) by Symantec: • T2777EB bundle — A.04.00.00 HP Serviceguard Cluster File System • T8687EB bundle — A.04.00.00 HP HA-OE with Serviceguard Cluster File System • T8697EB bundle — A.04.00.
Table 2 CFS Unsupported Features (continued) Features and Commands Not Supported on CFS Cache Advisories Cache advisories are set with the mount command on individual file systems, but are not propagated to other nodes of a cluster. Cached Quick I/O This Quick I/O for Databases feature that caches data in the file system cache is not supported on CFS.
Maximum number of nodes A maximum of 16 nodes are supported in a Serviceguard Storage Management Suite CFS configuration. Single network option The Veritas Storage Foundation™ 5.1 SP1 Cluster File System Administrator's Guide refers to the option for a single network during installation. This is not relevant in a Serviceguard Storage Management installation. SG SMS creates GAB/LLT configurations on the same networks that have Serviceguard heart beats.
CFS Administration CFS enables multiple hosts to mount and perform file operations concurrently on the same storage device. To operate in a cluster configuration, CFS requires the integrated set of Veritas ™ products by Symantec that are included in the HP Serviceguard Storage Management Suite. CFS includes Low Latency Transport (LLT) and Group Membership Atomic Broadcast (GAB) packages. The LLT package provides node-to-node communications and monitors network communications.
using the sg/cfs_all template. CVM must be up and running when you create or modify modular CFS packages. For more information on modular CFS packages, see Creating a Storage Infrastructure with Veritas Cluster File System (CFS) and Managing Disk Groups and Mount Points Using Modular Packages in chapter 5 of Managing Serviceguard Nineteenth Edition available at: www.hp.com/go/ hpux-serviceguard-docs → HP Serviceguard Storage Management Suite A.04.
NOTE: Remove remote shell permissions after completing the CFS installation and configuration. Resource Temporarily Unavailable If the installation fails with the following error message on the console: fork() failed: Resource temporarily unavailable The value of the nkthread tunable parameter may not be large enough. The nkthread tunable requires a minimum value of 600 on all systems in the cluster.
qio option enabled. So if some nodes in the cluster have a Quick I/O license installed and others do not, a cluster mount can succeed on some nodes and fail on others due to different mount options. To avoid this situation, ensure that Quick I/O licensing is uniformly applied, or be careful to mount the cluster file system with the qio/noqio option appropriately specified on each node of the cluster. See the mount(1M) manual page. • A shared CVM volume was not specified.
Performance Issues Quick I/O File system performance is adversely affected if a cluster file system is mounted with the qio option enabled and Quick I/O is licensed, but the file system is not used for Quick I/O files. Because qio is enabled by default, if you do not intend to use a shared file system for Quick I/O, explicitly specify the noqio option when mounting. Low Memory Under heavy loads, software that manages heartbeat communication links may not be able to allocate kernel memory.
