File_System_Migration

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CDMS Overview Introduction This section contains EMC ® VNX File System Migration (also known as CDMS) overviews for the network file system (NFS) and Common Internet File System (CIFS) protocols. It contains information on document structure, relevant terminology, NFS and CIFS restrictions, migration tools, supported capabilities, document assumptions, migration requirements, and configuration guidelines. NFS CDMS allows you to seamlessly migrate existing NFS file systems from source file servers to the VNX while providing full read/write access to the affected data. It preserves file attribute-related information such as permissions, atime/mtime, and UID/GIDs. NFS is a file-sharing protocol that enables you to share a file system over a TCP/IP network. The file systems might be migrated from a general-purpose NFS source file server, VNX, or an appliance product such as NetApp. During data migration, there is little or no disruption of data availability and access to the UNIX workstation client. During data migration, it is a best practice to monitor the VNX and EMC Symmetrix ® system resources. It is recommended that you use the tools that are provided to do this monitoring such as the EMC Unisphere GUI. If a further level of monitoring is needed, use Workload Analyzer as this tool allows you to monitor the system’s resources. CIFS CDMS allows you to seamlessly migrate existing data by using the CIFS protocol from source file servers to the VNX with limited interruption to normal business operations. The CIFS protocol enables Microsoft Windows clients to map share file systems on the VNX as network drives. Table 1 on page 19 provides a list of supported CIFS source file servers. Each Data Mover can be configured as one or more virtual CIFS servers. Each virtual CIFS server can have its own shares and can belong to a different Windows domain. The VNX supports access control lists (ACLs) for shares, directories, and files accessed with the CIFS protocol. 16 VNX File System Migration Version 2.0 for NFS and CIFS User Guide 7.1
Supported capabilities CDMS Overview This section describes currently supported NFS and CIFS migration capabilities. It describes capabilities common to protocols as well as NFS-specific and CIFS-specific capabilities. Common The following supported functions are common to NFS and CIFS data migrations: ◆ Simultaneous migration of multiple servers and file systems. ◆ Use of international characters in file system migration, I18N for file/directory names for NFS. For CIFS, Unicode is used to format the character set. Using International Character Sets on VNX for File provides more information. ◆ CDMS on all models of Data Movers. At a minimum, 507 Data Movers are recommended for best performance. ◆ Consolidation of multiple, existing, file systems into a single, standard, Data Mover UxFS file system. NFS specific The following supported functions are unique to NFS data migrations: ◆ Migration of a single file system in parts to several UxFS file systems by using one or more Data Movers. ◆ Unchanged migration of the following file inode information: Size Access time Modification time User ID (UID) GID, privilege, and mode bits Link count Supported capabilities 17
Page 1 and 2: EMC ® VNX Series VNX File System
Page 3 and 4: Preface Contents Chapter 1 CDMS Ove
Page 5 and 6: Administrative share methodology...
Page 7 and 8: Figures Title Page 1 NFS configurat
Page 9 and 10: Tables Title Page 1 CIFS migration
Page 11 and 12: Preface As part of an effort to imp
Page 13 and 14: Typographical conventions EMC uses
Page 15: Invisible Body Tag 1 CDMS Overview
Page 19 and 20: CIFS specific The following support
Page 21 and 22: Scope CDMS Overview This section co
Page 23 and 24: Assumptions CDMS Overview This sect
Page 25 and 26: Configuring VNX User Mapping provid
Page 27 and 28: CDMS Overview ◆ The user account
Page 29 and 30: System requirements CDMS Overview T
Page 31 and 32: Restrictions and limitations CDMS O
Page 33 and 34: CDMS Overview ◆ Microsoft guarant
Page 35 and 36: NFS specific The following tools ar
Page 37 and 38: CDMS Overview Figure 2 on page 37 s
Page 39 and 40: Mail Options Users Alex Ted Joe mai
Page 41 and 42: CDMS Overview 4. The mail.txt file
Page 43 and 44: Issue tracker CDMS Overview The iss
Page 45 and 46: Invisible Body Tag 2 Site Preparati
Page 47 and 48: Checklist This section contains a c
Page 49 and 50: Site Preparation ❑ Configure the
Page 51 and 52: Using the server_cdms command Table
Page 53 and 54: User interfaces choices GUI support
Page 55 and 56: Determining file system size Runnin
Page 57 and 58: Site Preparation ◆ If the source
Page 59 and 60: Site Preparation ◆ Creating print
Page 61 and 62: Usermapper methods Site Preparation
Page 63 and 64: Adding Win32 API to Perl script (CI
Page 65 and 66: Step Action Table 5 Adding Win32 AP
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Invisible Body Tag 3 Migration Proc
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Personnel qualifications Migration
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Invisible Body Tag 4 Planning and D
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Planning and Design migrations, a c
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Planning and Design Do files get co
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Planning and design Planning and De
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Step Action Planning and Design 4 (
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Data Migration Analysis and detaile
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Step Action To complete the file sy
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Planning and Design File format The
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Invisible Body Tag 5 NFS The follow
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Summary Table 6 on page 89 summariz
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2. If the Data Mover assumes the IP
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Step 2: Preparing file systems for
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Action To create an MGFS, use this
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6. Check that the file system is mo
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Step 4: Starting the CDMS migration
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Action localPort= = port number use
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3. Check the server log to ensure t
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The fstab must be modified as follo
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Step 6: Ensuring that all data is m
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Output $ server_2 : pmacF30: path =
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Extending disk space If you run out
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Step 8: Verifying migration complet
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Action To verify the status of a mi
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Step 9: Converting the migration fi
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Many-to-one migration Step 5: Conne
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-type {nfsv2|nfsv3} = NFS version 3
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Parallelization or serialization Si
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Ensure that you monitor the progres
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Postmigration testing Assuming the
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Invisible Body Tag 6 CIFS The follo
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Administrative share methodology Us
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One-to-one migration Source file se
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Summary Table 8 on page 135 summari
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Step 1: Creating an account Create
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For a Windows NT 4.0 environment If
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Output SHAREDUP 01.06 Copyright (c)
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where: exclude = default prefix =
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Step 4: Identifying high-priority f
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Note: Kerberos is a security system
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3. Enable Unicode for the Data Move
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Action To configure interfaces betw
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Perform the following: 1. Create st
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Output Note id = 18 name = mgfs1 ac
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Step 8: Preparing for migration Per
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a. If migrating from a Windows 2000
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Step 9: Setting up the CIFS environ
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3. For Windows environments, ensure
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Two rights are required for the lgd
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Step 11: Creating CDMS connections
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For a Windows NT 4.0 environment Ac
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Configure the Data Mover by using a
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Step 14: Ensuring that all data is
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If the error log is not empty, foll
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Monitoring progress Action To monit
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Action To verify the status of a mi
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Step 17: Converting the MGFS to a U
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! CAUTION Step 18: The next step If
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Summary The steps to implement many
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Retained server name merge New serv
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Step 4: Evaluating the source file
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Output Note id = 246 name = stv1 ac
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Output id = 33 name = mgfs2 acl = 0
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Two rights are required for the lgd
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Step 10: Setting up the CIFS enviro
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For a Windows NT 4.0 environment Ac
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Step 11: Migrating local group info
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Action To migrate the local group i
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Create connections for each CIFS so
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To perform this task, use a command
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= mount point name of the MGFS (wit
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The sharedup.exe utility output fil
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Step 14: Ensuring all data is migra
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Step 6: Backing up the source file
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Step 10: Setting up the CIFS enviro
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Step 16: The next step If all CIFS
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Invisible Body Tag 7 Troubleshootin
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Problems and solutions Troubleshoot
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CDMS connect fails on session setup
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Migration suspension (hang) conditi
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For example, if the system server_3
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Connection command failures (CIFS)
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Time skews too much in a Windows 20
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Example SMB: 3: CIFSCallBackForMGFS
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Managing a failed verification or c
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Step Action Troubleshooting CDMS 5
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Using the server_cdms command Troub
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Table 14 Migration error codes (pag
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CDMS server log error messages Trou
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Invisible Body Tag A Using CDMS Mig
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Tool description summary Using CDMS
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ackupWrapper.exe utility Using CDMS
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# #SHAREDUP FILE @Revision:1 @Sourc
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Using CDMS Migration Tools to migra
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ch_group.pl script Tool location UN
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Using CDMS Migration Tools “Migra
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Using CDMS Migration Tools ◆ If t
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Running the script Run the scripts
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Displaying directory structure (Win
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Using CDMS Migration Tools Using a
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Using CDMS Migration Tools If the a
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Using CDMS Migration Tools Function
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Step Action Using CDMS Migration To
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Using CDMS Migration Tools xxxxxxxx
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International multibyte character s
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Subdirectory open successfully Clie
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Known issues There are known issues
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diskUsage.pl script Using CDMS Migr
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Entering the pathname for the log f
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Using CDMS Migration Tools ========
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Using CDMS Migration Tools As shown
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lgdup.exe utility Using CDMS Migrat
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Table 19 The shareup.exe utility op
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Invisible Body Tag B Estimating NFS
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Assumptions Estimating NFS Data Mig
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Initial time estimate Example Estim
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Small file data migration rates Est
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Estimating NFS Data Migration Times
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Parallel migration Estimating NFS D
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Invisible Body Tag C NFS Mount and
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Constructing read requests NFS Moun
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NFS Mount and Export Options File i
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NFS Mount and Export Options The an
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Migrating files with the SetGroupID
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Invisible Body Tag D Logging The fo
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Sample session The following is an
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. Using a text editor, open the par
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Invisible Body Tag E Network Applia
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Procedure Step Action Network Appli
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! Output Network Appliance Consider
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Network Appliance Considerations 7.
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Symbols .ckpt file, disposition 269
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connection command spaces in share
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converting 51 exporting for NetApp
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duration variables 110, 174 example
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Windows systems 33 sequential migra
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X xlt.cfg file, editing for interna
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