Cluster-Wide Central Control | Quantum 3.5 instruction

Appendix C StorNext Files

Cluster-Wide Central Control

Cluster-Wide Central Control

The purpose of this feature (currently supported on the Linux platform only,) is to provide cluster-wide central control. A central control file called nss-cctl.xmlprovides a way to restrict the behavior of SNFS cluster nodes (fsm, file system client, cvadmin client) from a central place: an NSS server.

This feature currently supports the following controls that allow you to specify:

1Whether a client is allowed to mount as a proxy client.

2Whether a client is allowed to mount as read/write or read-only.

3Whether a user (especially a local administrator on Windows clients,) is allowed to take ownership of a file or directory on a Stornext file system.

4Whether cvadmin running on a certain client is allowed to have super admin privilege to run destructive commands such as starting/ stopping the file system, refreshing disks, changing quota settings, and so on.

5Whether cvadmin running on certain client is allowed to connect to other fsms via the -Hoption.

The control file is in xml format and has a hierarchical structure. The top level element, snfsControl, contains control elements with the securityControl label for certain file systems. If you have different controls for different file systems, each file system should has its own control definition. A special virtual file system, SNFS_ALL, is used as the default control for file systems not defined in this control file. It is also used to define the cvadmin-related control on clients.

Note: You cannot have a file system named SNFS_ALL.

Each file system-related element (indicated by the label securityControl) has a list of controlEntry items. Each controlEntry item defines the client and the controls. The client type can be either host or netgrp. A host can be the IP address or the host name. (Both IP V4 and IP V6 are supported.) Netgrp specifies a group of consecutive IP addresses and has a network IP address (either IP V4 or V6,) and network mask bits. It is possible for

StorNext 3.5 Installation Guide

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Quantum 3.5 manual Cluster-Wide Central Control

Contents

StorNext Copyright Statement Contents Displaying the Configuration Wizard StorNext GUI Accessing the StorNext GUI 112 106110 111 125 Viewing a Fibre Channel Device 124 Figures Figures 104 101102 103 Tables 146 105 Preface Purpose Audience Document Organization Convention Example Notational Conventions Related Documents North America Online Service Support World Wide WebContacting Quantum Document No Document Title Document Description 1Installing StorNext File System and Storage Manager Operating System Requirements Storage Manager System RequirementsHardware Requirements Operating System Kernel Platform Disk Space File SystemsPartitioning Local Hard Disks LAN Requirements Than 1 TB Getting Ready to InstallConfiguring Storage Devices Planning for LUNs Larger Operating Label for System LUNs 1 TB LUNs 1-2 TB LUNs 2 TB Vtoc Before You Begin Pre-Installation ScriptSupport Directory Description Pre-installation script runs figure Running snPreInstall Interpreting snPreInstall Output Type Description Remove the existing rpms StorNext Installation Script For Red Hat users only, before proceeding you must Installation script runs figure Menu Option Description Changing Installation Configuration Options Changing Application Directory Locations Configuration Menu Changing the Default Media Type Performing an Installation Operation 2Installing StorNext File System Windows Server File System Requirements Etc/hosts file Planning for LUNs Larger than 1 TB SVTOC MacOS X Panthera Apple Xsan Installing the Linux Kernel Source Code Installing StorNext File System on Linux or UnixLaunching the Snfs Installation Script Ls -l Exit the Snfs installation script Change installation options for the locationApplication directories see Changing Performing an Installation Operation Disabling Automatic IP Address Configuration Installing StorNext File System on Windows Removing a Previous Version of StorNext StorNext Installation window appears figure Running the Setup Wizard StorNext Installation Window Install StorNext Snfs Setup End User License Agreement Snfs Setup Choose Setup Type Click an installation option Snfs Setup Finish Restoring a Previous Client Configuration StorNext Installation Window Configure StorNext Import/Export Client Configuration Window Click an option for handling current configuration settings 3Installing the StorNext Client Operating System Release or Kernel Platform Client System Requirements StorNext File System Client Buffer Cache Hardware Requirements Platform Type =2GB Memory Downloading the StorNext Client Software Select Platform window appears figure For a MDC running Snfs only On the home page, click Download Client Software Window Installing the StorNext Client on Linux Installing the StorNext Client on Linux or Unix Mkdir -pmount point chmod 777 mount point Installing the StorNext Client on Sun Solaris File system mount point cvfs 0 auto rw Installing the StorNext Client on HP-UX Installing the StorNext Client on IBM AIX Mkdir -pmount point chmod 777 mount point Installing the StorNext Client on Windows StorNext Installation Window Remove StorNext Click Next to continue License Agreement window appears figure Snfs Setup Choose Setup Type Restoring a Previous Client Configuration StorNext Installation Window Configure StorNext Click an option for handling current configuration settings Configuring StorNext StorNext GUI Accessing the StorNext StorNext Home File System and Storage Manager Configuration Wizard StorNext Configuration Wizard File System Only Add File System Enter License Add Tape Drive Add LibraryAdd Media Add Storage Policy Add Storage DisksMail Notification Configuring a Distributed LAN Client Server Distributed LAN server configuration utility appears figure Sndpscfg Configuration Utility Field / Button Description Using Distributed LAN Client and Server Commands Creating an Override ConfigurationCommand Description Windows Configuration Utilities Mount Point Client Configuration Instead of selecting Map to Drive Letter, select Select Map to Drive Letter to map the drive toSpecific drive letter Select the desired drive letter Distributed LAN LANserver Select this option to disable the StorNext clientSelect to configure the StorNext client as a As a distributed LAN client or distributed Advanced Mount Options Specify the number of times the driver will re Default isWhen this box is checked, the driver attempts Default is off Soft Mount. Quantum Accessed When this box is checked, the file system canBe mounted and accessed without all Disks being accessible in the file system stripe PathInError will be bypassed in favor When you choose Allow I/O Timouts, thisRequest in error, otherwise reset Penalty value, where n is expressed Advanced Cache Options Will not buffer any data. All files will be read When this box is not checked, the file systemDirectly into the applications memory using If Buffer Cache is disabled, the remaining Maximum of 100. Using a value of 0 disables File system block size. The value default isDefault value is 1MB Default value is 16 buffers with a Shared on the SAN, setting the Attribute Flush Default values are 30 seconds for nonSetting these parameters lower will greatly Circumstances where files are frequently On the Disk Labeler window, do one of the following Disk Device Labeler Labeling Disks Do not write a label to the disk and proceed to License Identifier Simple File System ConfigurationClose the Disk Labeler dialog box Click to select all devices in the list Name used by clients when establishing aSwitching to the next disk in the stripe group Click to deselect all devices in the list Configuration utility Click to save the configuration usingCurrent settings. The configuration file is Saved in the StorNext configuration directory Configuring StorNext Windows Configuration Utilities Click to save changes to the FSM services list Click to add a file system to the FSM servicesFSM services list Configurations is highest priority and 9 is Utility without saving changes Click to quit the File System Startup List Server Administration File System Properties Stripe Group Properties Quota Properties Been used Type the name of the user or group to set aQuota for Displays the percentage of the quota that has Server Configuration Quality of Service InformationClients Information Disk Definitions on Stripe Groups on Disk Types on Global Settings When reading and storing files Optional Select to send a warning when aUser attempts to access a file that is locked or Allocate when a file is created Disk Types Server Configuration Disk Types Disk Definitions Click to create a new disk definition. Type a Select to enable the selected disk definitionWhen enabled, the defined disk is available to Configured file system for I/O Stripe Groups Click to delete the selected device name Using the Quality of Service QOS API Select to enable the selected stripe groupWhen enabled, the stripe group is available to Accesses the disk Installing Promise RAID Controller Software Windows Boot Manager Screen Windows Boot Manager Screen StorNext 3.5 Installation Guide 109 Uninstalling StorNext on Unix and Linux Uninstalling StorNext Snfs Uninstalling Snsm StorNext Remove Main Menu Uninstalling the StorNext Client Software HP-UX Uninstalling StorNext on Windows Sharing a Library Between Applications StorNext Administration Tasks Vi mediafilelibraryname Fssysparmoverride Configuration File Manually Modifying Storage Manager Configuration StorNext 3.5 Installation Guide 117 Mounting Snfs on the OSx Computer Connecting to a StorNext Network Using Xsan StorNext 3.5 Installation Guide 119 Creating the automount.plist File Mounting Snfs on the Mac OS X Computer Plist StorNext 3.5 Installation Guide 123 Viewing a Fibre Channel Device Changing Log Rolling Times StorNext Log Rolling AdministrationLog Rolling Options Avoiding Poor System Performance Modified find command looks like this Example.cfg File StorNext Files Appendix C StorNext Files Page Page Page Page Page Cluster-Wide Central Control Cluster-Wide Control File Example Page # Snfsall Commonly Used Snfs Files Cvlog debug and runtime messages Usr/cvfs/docs Cvapi.c a sample API application Quality of Service Guide Active vs. Passive Supported Platforms Overview Non-Realtime Operation ConfigurationUnit of I/O Converting MB/sec to I/O/ sec Name Description Default Reserve Rtio Upper Bound Token Timeouts Real-time I/O SetRtio Oversubscription Handles Ungated files Calculating Available Non-Realtime I/O ConfigurationAll internal calculations are done in terms of I/O/sec Host bw-type sg=yy,sg=yy Configuration File Examples Callbacks Client in Step Above diagram, a process on client a requests some amountStripe group back to non-real-time mode Issued and return to the previous state Be back in its original state Stripe group is back in non-real-time mode, Client a requests some amount of Rtio as in Figure Situation arises it can be detected StorNext 3.5 Installation Guide 157 Failure Semantics , assume the stripe group is already in real-time mode as aTime I/O token in . The FSM calls back to Clients B and D Client C with the new token in Step FSM Failures Client Failures Send out callbacks to other clients MonitoringReal-time I/O available Client Token Releases Sharing Disk Resources