OES 23.4: NSS File System Administration Guide for Linux

OES 23.4: NSS File System Administration Guide for Linux

Overview of NSS

Introduction to NSS

Benefits of NSS

Understanding NSS

NSS Features and Capabilities

Comparison of NSS to Other File Systems

What’s New or Changed in NSS

What’s New or Changed in NSS (OES 24.3)

What’s New or Changed in NSS (OES 24.2)

What’s New or Changed in NSS (OES 24.1)

What’s New or Changed in NSS (OES 23.4)

NSS Active Directory Support

New Additions or Modifications to the Existing NSS Utilities

OES File Access Rights Management (NFARM)

OES User Rights Map (NURM)

Installing and Configuring OES Storage Services

Requirements for Installing NSS

Installing and Configuring NSS

Upgrading the Media Format for Hard Link Support

Enabling Users for Linux Utilities and Services

Updating NSS on OES 23.4

Upgrading from OES 2 to OES 23.4

Upgrading the NSS Media Format

Guidelines for Upgrading the Media Format of NSS Volumes

Enabling Hard Links After the Media Upgrade

NSS Media Upgrade

Automatic Pool Media Upgrade

Planning NSS Storage Solutions

Guidelines for NSS Storage

Compatibility and Interoperability Issues for NSS

Creating NSS Storage Objects in eDirectory

Naming NSS Storage Objects

Access Control for NSS

File Access for Users

Antivirus Support for NSS

Backup Support for NSS

NSS Support for Memory Mapped Files

Using NSS in a Virtualization Environment

Guidelines for Using NSS in a Xen Virtualization Environment

Installing OES on a Virtual Machine

Initializing New Virtual Disks on the Guest Server

Cross-Platform Issues for NSS

Cross-Platform Issues for NSS Pool Snapshots

Cross-Platform Issues for NSS Volumes

Cross-Platform Issues for NSS Features

Cross-Platform Issues for File Access

Cross-Platform Issues for Management Tools

Cluster-Enabling Shared NSS Devices and Pools with OES Cluster Services

Cluster-Enabling NSS Pools and Volumes

Guidelines for Cluster-Enabling NSS

Management Tools for NSS

iManager and Storage-Related Plug-Ins

NSS Management Utility (NSSMU) Quick Reference

NSS Commands and Utilities

OES Remote Manager

Client for Open Enterprise Server

Virtual File Services, APIs, and Scripts

OES Linux Volume Manager (NLVM)

Managing Devices

Understanding Devices

Viewing a List of Devices on a Server

Viewing Details for a Device

Scanning for Devices

Initializing a Disk

Sharing Devices

Viewing Partitions on a Device

Viewing Pools on a Device

Enabling Write-Through Cache Management on SCSI Devices and RAID Controllers

Migrating NSS Devices to OES 23.4

Guidelines for Moving Devices from NetWare 6.5 SP8 to OES 23.4

Moving Non-Clustered Devices From NetWare 6.5 SP8 Servers to OES 23.4

Moving Clustered Devices with NSS Volumes to OES 23.4

Migrating NSS Data from NSS32 to NSS64

Managing Partitions

Understanding Partitions

Viewing a List of Partitions

Viewing Details for a Partition

Deleting an NSS Partition

Adding Other Types of File System Partitions

Managing NSS Software RAID Devices

Understanding Software RAID Devices

Planning for a Software RAID Device

Viewing a List of Software RAID Devices on a Server

Viewing Details of a Software RAID Device

Creating Software RAID Devices with iManager

Creating Software RAID Devices with NSSMU

Mirroring an Existing Pool with NSSMU

Recovering a Mirror where All Elements Report ‘Not in Sync’ Using NSSMU

Creating a RAID 1 Mirror to Duplicate Data

Creating a Software RAID 0+1 with NSSMU

Creating a Software RAID 5+1 with NSSMU

Renaming a Software RAID Device

Increasing the Size of a Software RAID Device

Restriping a Software RAID

Replacing a Failed Segment in a Software RAID

Deleting a Software RAID Device

Viewing Pools on a Software RAID Device

Viewing Partitions on a Software RAID Device

Deleting Partitions on a Software RAID Device

Managing Software RAID Devices with NSSMU

Managing Multipath I/O to Devices

Understanding Multipath I/O

NSS Errors When Linux Multipath Is Not Configured

Configuring Multipath

Managing NSS Pools

Guidelines for Creating a Pool

Creating a Pool

Activating and Deactivating Pools

Increasing the Size of a Pool

Renaming a Pool

Deleting a Pool

Managing Fstrim on a Pool

Viewing Pools on a Server

Viewing Pool Details

Viewing Partition Information for a Pool

Viewing Volume Information for a Pool

Viewing Device Information for a Pool

Preventing Pools from Activating on Multiple Servers

Updating eDirectory Pool Objects

Updating eDirectory for Shared Pool

Verifying and Rebuilding NSS Pools and Volumes

When to Use Verify and Rebuild

Verifying and Rebuilding an NSS Pool and Its Volumes

ReZIDing Volumes in an NSS Pool

Managing NSS Pool Snapshots

Understanding Pool Snapshots

Guidelines for Using and Managing Pool Snapshots

Creating a New Pool Snapshot

Viewing a List of Snapshots for a Given Pool

Viewing Pool Snapshot Details

Modifying the Stored-On Location for Snapshots

Onlining or Offlining a Pool Snapshot

Viewing and Managing an Online Pool Snapshot

Restoring Data from an Online Pool Snapshot

Deleting a Pool Snapshot

Managing NSS Volumes

Understanding Volume Properties

Guidelines for NSS Volumes

Creating Unencrypted NSS Volumes

Configuring Encrypted NSS Volumes with NSSMU

Updating eDirectory Volume Objects

Viewing the Details of an NSS Volume

Viewing Properties of an NSS Volume

Modifying Attributes of an NSS Volume

Modifying the NSS Volume Size

Configuring the Name Space for an NSS Volume

Mounting NSS Volumes with Linux Commands

Renaming an NSS Volume

Renaming (Modifying) the Mount Point for an NSS Volume

Activating and Deactivating an NSS Volume

Mounting and Dismounting an NSS Volume

Exporting and Importing NSS Volumes for NFS Access

Deleting an NSS Volume

Finding the Filename for a Given ZID

Setting and Viewing the ZID Mode for a Volume

Verifying or Rebuilding NSS Volumes

Moving Volumes with DFS

Splitting Volumes with DFS

Managing Encrypted NSS Volumes

Understanding Encrypted Volume Support

Security Considerations for Encrypted Volumes

Creating an Encrypted Volume

Mounting an Encrypted NSS Volume with NSSMU

Mounting Encrypted NSS Volumes with NSS Commands

Dismounting an Encrypted NSS Volume with NSSMU

Using Encrypted Volumes in a Server Cluster

Removing Encrypted Volumes

Using Encrypted Buffers

Securing Access to NSS Volumes, Directories, and Files

Configuring File System Trustees, Trustee Rights, Inherited Rights Filters, and Attributes

Configuring the Security Equivalence Vector Update Frequency

Using Data Shredding to Prevent Access to Purged Files

Enabling or Disabling LAF Audit Log Messages for Trustee Events

Managing Compression on NSS Volumes

Understanding Compression

Configuring Compression for a Server

Configuring a Volume for Compression

Suspending Compression for Volumes or Files

Disabling Compression for a Volume

Restoring Data to a Uncompressed Volume

Configuring Compression Preferences for Directories and Files

Using NSS Commands to Configure and Monitor Compression

Repairing Compressed Volumes with the Compfix Utility

Backing Up Compressed Files

Managing Space Quotas for Volumes, Directories, and Users

Understanding Space Quotas

Managing NSS Volume Quotas

Managing Directory Quotas

Managing User Space Quotas

Salvaging and Purging Deleted Volumes, Directories, and Files

Understanding the NSS Salvage System

Configuring the Purge Behavior for NSS

Enabling or Disabling the Salvage Attribute for an NSS Volume

Viewing, Salvaging, or Purging Deleted NSS Volumes in a Pool

Salvaging or Purging Deleted Files with iManager

Salvaging or Purging Deleted Files with Other Tools

Managing Hard Links

Understanding Hard Links

Upgrading the Media Format for Hard Links Support

Enabling or Disabling the Hard Links Attribute

Creating a Hard Link Using Ln on an NSS Volume

Creating a Hard Link Using a zLink API

Creating a Hard Link for Testing Purposes

Viewing Hard Links for a File

Deleting a Hard Link

Deleting a Primary Link

Managing Files and Folders on NSS Volumes

Creating a Folder on an NSS Volume

Deleting a File or Folder on an NSS Volume

Uploading Files to an NSS Volume

Downloading Files from an NSS Volume

Renaming a File on an NSS Volume

Moving a File to Different Folder on an NSS Volume

Viewing or Modifying File or Folder Properties

Viewing or Modifying File Ownership

Viewing, Adding, Modifying, or Removing a Directory Quota

Managing Backup and Restore for Data and Trustee Information

Using OES Storage Management Services

Using the Event File List to Refine the Backup

Using METAMIG to Save and Restore Trustee Information on NSS and Linux POSIX File Systems

Using Extended Attributes (xAttr) Commands

Backing Up Files Without Altering the Access Time

Additional Information

Tuning NSS Performance

Do I Need to Tune NSS?

Tuning Cache Buffers for NSS

Configuring or Tuning Group I/O

Tuning I/O Schedulers

Configuring Delayed Block Allocation

Monitoring the Status of the NSS File System and Services

Monitoring Status of NSS Devices, Pools, and Volumes with iManager

Monitoring Compression and Salvage Statistics

Monitoring Quotas and Space Usage for NSS Pools and Volumes

Monitoring File System Parameters

Troubleshooting the NSS File System

NSS Server Hangs on Ceph Storage with the RADOS Block Device

Deleting a Cluster Pool Using iManager Fails with an Error

Rights Command Failure

Cannot Connect to Target Servers from iManager

Cannot See NSS Devices, Pools, or Volumes

eDirectory Errors When Creating NSS Pools or Volumes

File Compression is Not Working

Linux Fails to Execute Dismount, Umount, or Delete Commands for NSS Volumes

Multipath Devices Are Not Resolved

NSS Volume Disappears from the NCP Console (ncpcon)

Pathname Exceeds 255-Character Limit

Server Hangs When Using an NSS Volume as a Netatalk Share

Slow Mount Performance for NSS Volumes Using the UNIX Name Space

Software RAID 1 Fails to Recognize a Replacement Device

Tuning NSS Volumes for GroupWise Servers

Unknown Users as File Owners

Using Scripts to Create or Manage NSS Pools and Volumes

NFS Volume Mount Failure Blocks the Mounting of Other File Systems

Using Linux iManager Not Able to Manage an OES Linux/NetWare Server

Selecting the Device/Partition Option Which is Corrupted

Salvaging an Encrypted Volume Fails After Renaming

Pool Activation Fails After Aborting ravsui Verify or Rebuild Process

Trustee Entries are Stored in Different Formats in NetWare and Linux Platforms

Debugging of nlvm Results in the Display of Warning Messages in the nlvm_debug.log File

NLVM Pool Move Fails and Deactivates the Pool

Changing NameSpace of a Volume Does Not Work if the Volume is in Use on the Server When NameSpace is Changed

Metamig Error When Copying Hidden or System File From Source Volume to Target Volume

iManager Taking Too Long to Load User Quotas or Error in Loading User Quotas

Error 23316 “No Space for Move Stamps” During a Pool Move

Role-based Users not able Access Rights to Files and Folders under Modify Group

An NSS32 Pool's Media Version Does not Change After Migrating to OES 2015

Using the rights Utility With the -d Option Results in an Error for DST Volumes

Troubleshooting NFARM

Security Considerations

Security Features of NSS

Preventing Unauthorized Access

Securing Sensitive Information During Remote Management Sessions

Protecting Data During Backup and on Backup Media

Preventing Exposure of Sensitive Data in a Core Dump

Preventing Exposure of the Encryption Password in a Log

Using Data Shredding to Prevent Unauthorized Access to Purged Files

Acquiring Security Equivalence Vectors for NSS Users

Protecting Modules Responsible for Security Equivalence Vectors

Controlling File System Access and Attributes for NSS Volumes

Displaying Directory and File Attributes for NSS Volumes

Security Best Practices for zAPIs

Controlling Physical Access to Servers and Resources

Securing Access to the Servers With a Firewall

Creating Strong Passwords

Using NSS Commands

Help and Find Commands

Access Time Command

Background File System Checker Commands

Cache Management Commands

Compression Commands

Data Shredding Commands

Daylight Savings Time Commands

Delayed Block Allocation Commands

eDirectory Storage Object ID Commands

Encrypted Buffers Commands

Extended Attributes (XAttr) Commands

Event File List (EFL) Command

NSS Media Upgrade Commands

I/O Write Commands

LAF Audit Log Messages Commands

Load Commands for the nssstart.cfg File

Low Storage Alert Messages Commands

Migration Support Commands for Near-Line Storage

Modified File List (MFL) Commands

Multipath I/O Failover Commands

Multiple Server Activation Prevention (MSAP) Commands

noatime and atime Commands

noatime and nodiratime Support for Linux open, mount, nfsmount, and /etc/fstab

Opportunistic Locking Commands

Pool Freeze and Thaw Commands

Pool Management Commands

Pool Snapshot Commands

Pool Verify and Rebuild Commands

POSIX Permission Mask Command

Quotas Commands

Read Ahead Blocks and Allocate Ahead Blocks Commands

Salvage and Purge Commands

Security Equivalence Vector Update Commands

Sendfile API Support Command

Status Commands

Visibility Rebuild Command

Volume Management Commands

attrib

compfix

metamig

nsscon

nssmu

nssupdate

ravsui

ravview

rights

volumes (NCP Console Utility)

nssquota

nssraid

ncsinit

nsschown

map-users

user-rights-map

sputil

Using Linux Commands to Manage NSS Devices

Creating and Mounting NSS Pools and Volumes by Using Linux Commands

Configuring Default Mount Settings for NSS Pools and Volumes

Expanding NSS Pools

Deleting NSS Pools

Copying Data from a Linux-Managed Pool to an NSS-Managed Pool

List of NSS Features

Comparison of NSS on Linux and NCP Volumes on Linux POSIX File Systems

NSS Nomenclature