Virtual Data Movers

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Virtual Data Movers

Upon completion of this module, you should be able to:• Describe Virtual Data Mover and its benefits and operations• Create and manage Virtual Data Movers on a VNX system

Virtual Data Movers

Copyright © 2014 EMC Corporation. All Rights Reserved. Virtual Data Movers 2

Virtual Data Movers

During this lesson the following topics are covered:• VNX Virtual Data Mover (VDM) feature overview• Benefits that VDMs provide to CIFS and NFS file storage • VDM operations

Lesson 1: Virtual Data Mover Overview

Copyright © 2014 EMC Corporation. All Rights Reserved.

Virtual Data Mover Overview

Virtual Data Movers 3

Virtual Data Mover

VDM Root File System

NFSServer

CIFSServer

• A “software” Data Mover• Supports:

Multiple CIFS servers An NFS server for single

domain namespace• Access data file system(s) and:

Shares for CIFS servers Exports for NFS server

• A “virtual container” Holds configuration data for

CIFS and NFS servers, shares and exports

Portable - can be moved or replicated to another physical Data Mover

DataFile System


• Root file system: root_fs_<vdm_x>• Mounted data file systems• CIFS server specific data:

CIFS server configurations Local Group DB Kerberos Information CIFS share DB Home directory information Audit and event logs Secmap

• NFS server specific data: NFS server endpoint and exports Name resolvers and STATD

hostname

Configuration held within each VDM


CIFS Server names and interfacesLocal Groups databaseKerberos InformationCIFS share database

Home DirectoriesEvent logs

NFS server endpoint and namespaceSTATD hostname

NFS exportsInterfaces

Virtual Data Mover

root_fs_vdm_1

SecmapNFSServer

CIFSServer

data_FS


Data Mover Feature & Configuration Information


Feature/Config Info Physical VirtualFTP/SFTP/FTPS Yes NoDNS/NIS/NTP/Routing Yes NoNetwork Interfaces Yes NoInternationalization Yes NoVirus Checker Yes NoLocal passwd & group files Yes NoPrimary/Secondary Usermapper Yes NoStandby Data Mover Yes NoParameters Yes NoStart/Stop CIFS Yes NoUsermapper client Yes YesSecmap Yes YesFile Systems Yes YesNFS Yes YesCIFS info (Local groups, shares, home dirs, interface & server names, audit logs, Kerberos)

Yes Yes


Virtual Data Mover Benefits• Ease of management of CIFS servers• Server isolation and security• Independent CIFS configurations on the same Data Mover• Load balancing• Migration and replication solution• NFS multiple domain solution


Copyright © 2014 EMC Corporation. All Rights Reserved. Virtual Data Movers

• The physical Data Mover has the VDM root file system mounted• The VDM’s NFS and CIFS servers are available on interfaces• The VDM has the data file system mounted to its root file system

Virtual Data Mover

NIS, DNS & NTP Client

NFSServer

Interface

InterfaceInterface

CIFSServer

Operational Virtual Data Mover

7

Root File System

/

/

DataFS

/share

/

Configuration Files

root_fs_vdm_1

/DataFS Mount

NFSServer CIFS

Server

/export

Interface

Interface

Interface

/root_vdm_1

Physical Data Mover

Mount


Storage > Shared Folders > CIFS > VDMs > Properties• VDM is moved to another

physical Data Mover VDM unmounts data file

systems VDM unloads from source

physical Data Mover VDM loads on target

physical Data Mover VDM mounts data file

systems

Moving a VDM

8


Storage > Shared Folders > CIFS > VDMs > Properties• VDM Stops running on physical Data Mover

Unloading a VDM

9

Data file system(s) must be unmounted from VDM

VDM stops access to Data Mover resources

VDM NFS/CIFS servers stop

Data Mover unmounts VDM root file system


Virtual Data Movers

During this lesson the following topics were covered:• VNX Virtual Data Mover (VDM) feature overview• Benefits that VDMs provide to CIFS and NFS file storage • VDM operations

Lesson 1: Summary


Copyright © 2014 EMC Corporation. All Rights Reserved. Virtual Data Movers 11

Virtual Data Movers

During this lesson the following topics are covered:• Virtual Data Mover creation• VDM states• VDM Implementation considerations for:

NamingInternationalizationNFSPortability

Lesson 2: Create and Manage Virtual Data Movers


Creating a VDM via Unisphere


Storage > Shared Folders > CIFS > VDMs > Create


VDM States


• Loaded – normal operational state

• Mounted – read-only state• Unloaded – inactive state


Summary of VDM States


VDM State NFS/CIFS Servers active?

VDM root file system state?

Data file system state?

VDM reloaded at boot?

Loaded(Default) Yes Mounted

(read/write) Accessible Yes

Mounted No Mounted(read-only) Inaccessible No

TempUnloaded No Unmounted Inaccessible Yes

PermUnloaded No Unmounted Inaccessible No


VDM Naming Considerations• VDM names must be unique

Avoid VDM name conflicts within VNX and if replicating to another VNX system

Renaming a VDM renames its root file system.


Replicator


Internationalization Mode Considerations• When created, VDM is set to internationalization mode of source

physical Data Mover When VDM is moved or replicated, target Data Mover

internationalization mode must match VDM’s mode


Unicode ASCII UnicodeUnicode


NFSv3/v4 TCP

Considerations for NFS on VDMs• VDM supports NFSv3 and NFSv4 over TCP protocol

UDP not supported• Supports a single NFS domain naming space per VDM• NFS configuration on VDMs is performed with CLI only

Refer to Configuring Virtual Data Movers on VNX document



VDM Portability Considerations• Networks and network services for source and target Data

Movers DNS/LDAP/NIS, NTP Interface names for NFS and CIFS servers

• Disk volumes and file systems


DNSNTP

LDAPNIS


Virtual Data Movers

During this lesson the following topics were covered:• Virtual Data Mover creation• VDM states• VDM Implementation considerations

Lesson 2: Summary



SummaryKey points covered in this module:• A Virtual Data Mover (VDM) is a VNX software-based Data

Mover • Considerations for implementing VDMs include:

Naming Internationalization Portability


Virtual Data Movers

Documents

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