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Sun ZFS Storage 7000 System Administration Guide
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Document Information

Preface

1.  Introduction

2.  Status

3.  Configuration

4.  Services

5.  Shares

Shares

Introduction

Concepts

Storage Pools

Projects

Shares

Properties

Snapshots

Clones

Shadow Migration

Shadow Data Migration

Traditional Data Migration

Migration via synchronization

Migration via external interposition

Shadow Migration

Shadow migration behavior

Restrictions on shadow source

Shadow filesystem semantics during migration

Identity and ACL migration

Shadow Migration Management

Creating a shadow filesystem

Managing background migration

Handling errors

Monitoring progress

Canceling migration

Snapshots of shadow filesystems

Backing up shadow filesystems

Replicating shadow filesystems

Shadow migration analytics

Shadow migration requests

Shadow migration bytes

Shadow migration operations

Migration of local filesystems

Tasks

Testing potential shadow migration

Migrating data from an active NFS server

Space Management

Introduction

Terms

Space Management Terms

Physical Data

Logical Data

Referenced Data

Snapshot Data

Quota

Reservation

Understanding snapshots

Filesystem and project settings

Data quotas

Data reservations

User and group settings

Viewing current usage

BUI

CLI

User or group quotas

BUI

CLI

Identity management

Filesystem Namespace

Filesystem namespace

Nested mountpoints

Protocol access to mountpoints

NFSv2 / NFSv3

NFSv4

SMB

FTP / FTPS / SFTP

HTTP / HTTPS

Shares

BUI

List of Shares

Editing a Share

Usage Statistics

Available space

Referenced data

Snapshot data

Unused Reservation

Total space

Static Properties

Compression ratio

Case sensitivity

Reject non UTF-8

Normalization

Volume block size

Origin

Data Migration Source

Project Panel

Creating Shares

CLI

Navigation

Share Operations

Properties

General

General Share Properties

Space Usage

Volume size

Thin provisioned

Properties

Mountpoint

Read only

Update access time on read

Non-blocking mandatory locking

Data deduplication

Data compression

Checksum

Cache device usage

Synchronous write bias

Database record size

Additional replication

Virus scan

Prevent destruction

Restrict ownership change

Custom Properties

Protocols

Shares Protocols

NFS

CLI Considerations

Security Modes

Character set encodings

SMB

SCSI

HTTP

FTP

SFTP

Access

Access Control

Root Directory Access

User

Group

Permissions

ACL Behavior

ACL behavior on mode change

ACL inheritance behavior

Root Directory ACL

Snapshots

Introduction

Snapshot Properties

.zfs/snapshot visible

BUI

Listing Snapshots

Taking Snapshots

Renaming a Snapshot

Destroying a Snapshot

Rolling back to a Snapshot

Cloning a Snapshot

Scheduled Snapshots

CLI

Listing Snapshots

Taking Snapshots

Renaming a Snapshot

Destroying a Snapshot

Rolling back to a Snapshot

Cloning a Snapshot

Scheduled Snapshots

Projects

BUI

List of Projects

Editing a Project

Usage Statistics

Available space

Referenced data

Snapshot data

Unused Reservation

Unused Reservation of shares

Total space

Static Properties

Compression ratio

Creating Projects

CLI

Navigation

Project Operations

Selecting a pool in a cluster

Properties

General

General Project Properties

Space Usage

Quota

Reservation

Inherited Properties

Custom Properties

Filesystem Creation Defaults

LUN Creation Defaults

Protocols

Project Protocols

NFS

SMB

iSCSI

HTTP

FTP

Access

Access Control

Inherited ACL Behavior

Snapshots

Introduction

Snapshot Properites

.zfs/snapshot visible

BUI

CLI

Replication

Remote Replication Introduction

Concepts

Terminology

Targets

Actions and Packages

Storage Pools

Project-level vs Share-level Replication

Configuring Replication

Creating and Editing Targets

Creating and Editing Actions

Modes: Manual, Scheduled, or Continuous

Including Intermediate Snapshots

Sending and Canceling Updates

Managing Replication Packages

BUI

CLI

Canceling Replication Updates

Disabling a Package

Cloning a Package or Individual Shares

Exporting Replicated Filesystems

Severing Replication

Reversing the Direction of Replication

Destroying a Replication Package

Examples

Reversing Replication

Remote Replication Details

Authorizations

Alerts

Replication and Clustering

Snapshots and Data Consistency

Snapshot Management

Replicating iSCSI Configuration

Replicating Clones

Observing Replication

Replication Failures

Upgrading From 2009.Q3 and Earlier

Schema

Customized Share Properties

BUI

CLI

Tasks

Create a property to track contact info

6.  Analytics

7.  Integration

Glossary

Filesystem Namespace

Filesystem namespace

Every filesystem on the appliance must be given a unique mountpoint which serves as the access point for the filesystem data. Projects can be given mountpoints, but these serve only as a tool to manage the namespace using inherited properties. Projects are never mounted, and do not export data over any protocol.

All shares must be mounted under /export. While it is possible to create a filesystem mounted at /export, it is not required. If such a share doesn't exist, any directories will be created dynamically as necessary underneath this portion of the hierarchy. Each mountpoint must be unique within a cluster.

Nested mountpoints

It is possible to create filesystems with mountpoints beneath that of other filesystems. In this scenario, the parent filesystems are mounted before children and vice versa. The following cases should be considered when using nested mountpoints:

Protocol access to mountpoints

Regardless of protocol settings, every filesystem must have a mountpoint. However, the way in which these mountpoints are used depends on protocol.

NFSv2 / NFSv3

Under NFS, each filesystem is a unique export made visible via the MOUNT protocol. NFSv2 and NFSv3 have no way to traverse nested filesystems, and each filesystem must be accessed by its full path. While nested mountpoints are still functional, attempts to cross a nested mountpoint will result in an empty directory on the client. While this can be mitigated through the use of automount mounts, transparent support of nested mountpoints in a dynamic environment requires NFSv4.

NFSv4

NFSv4 has several improvements over NFSv3 when dealing with mountpoints. First is that parent directories can be mounted, even if there is no share available at that point in the hierarchy. For example, if /export/home was shared, it is possible to mount /export on the client and traverse into the actual exports transparently. More significantly, some NFSv4 clients (including Linux) support automatic client-side mounts, sometimes referred to as "mirror mounts". With such a client, when a user traverses a mountpoint, the child filesystem is automatically mounted at the appropriate local mountpoint, and torn down when the filesystem is unmounted on the client. From the server's perspective, these are separate mount requests, but they are stitched together onto the client to form a seamless filesystem namespace.

SMB

The SMB protocol does not use mountpoints, as each share is made available by resource name. However, each filesystem must still have a unique mountpoint. Nested mountpoints (multiple filesystems within one resource) are not currently supported, and any attempt to traverse a mountpoint will result in an empty directory.

FTP / FTPS / SFTP

Filesystems are exported using their standard mountpoint. Nested mountpoints are fully supported and are transparent to the user. However, it is not possible to not share a nested filesystem when its parent is shared. If a parent mountpoint is shared, then all children will be shared as well.

HTTP / HTTPS

Filesystems are exported under the /shares directory, so a filesystem at /export/home will appear at /shares/export/home over HTTP/HTTPS. Nested mountpoints are fully supported and are transparent to the user. The same behavior regarding conflicting share options described in the FTP protocol section also applies to HTTP.