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Related Manuals for Sun Microsystems Sun StorEdge Network Data Replicator 3.0
Summary of Contents for Sun Microsystems Sun StorEdge Network Data Replicator 3.0
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Page 1: Configuration Guide
Sun StorEdge ™ Network Data Replicator 3.0 Configuration Guide Sun Microsystems, Inc. 901 San Antonio Road Palo Alto, CA 94303-4900 U.S.A. 650-960-1300 Part No. 806-7550-10 June 2001, Revision A Send comments about this document to: docfeedback@sun.com... - Page 2 Sun, Sun Microsystems, le logo Sun, Sun StorEdge, Sun Enterprise, Solstice Disksuite, Sun Trunking, SunScreen, AnswerBook, et Solaris sont des marques de fabrique ou des marques déposées, ou marques de service, de Sun Microsystems, Inc. aux Etats-Unis et dans d’autres pays.
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Page 3: Table Of Contents
Contents Preface Overview Sun SNDR Software Description Supported Hardware and Software 3 TCP/IP Connection Hardware Components 3 Network Multipathing 4 Applications 5 Architecture Configuration Considerations 7 Volumes Eligible for Replication Choosing Volume Level Protection Bitmap Volumes for Scoreboard Logs 8 Choosing a Connection Medium to Link My Sites ATM Link Advantages Configuring Redundant Links Between Sites... - Page 4 Using The Sun SNDR and Sun StorEdge Instant Image Software 16 Sun SNDR Software and Sun StorEdge Fast Write Cache Software One-to-Many and Multihop Volume Sets 18 Using The Sun SNDR Software in a Firewall Environment 19 Sun StorEdge Network Data Replicator 3.0 Configuration Guide • June 2001...
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Page 5: Preface
Preface The Sun StorEdge Network Data Replicator 3.0 Configuration Guide describes the Sun StorEdge™ Network Data Replicator (Sun SNDR) software and general information about its use. This guide is intended for system administrators who have experience with the Solaris™ operating environment and related disk storage systems. -
Page 6: Documentation Conventions
-b {phost | shost} { arg | arg} In syntax, braces and pipes indicate that one of the arguments must be specified. vi Sun StorEdge Network Data Replicator 3.0 Configuration Guide • June 2001... -
Page 7: Related Documentation
Title Part Number man pages sndradm scmadm svadm iiadm Latest information Sun StorEdge Network Data Replicator 3.0 Software 806-7513 Notes Sun StorEdge Instant Image 3.0 Release Notes 806-7678 Installation and User Sun StorEdge Network Data Replicator 3.0 806-7514 Installation Guide Sun StorEdge Instant Image 3.0 Installation Guide... - Page 8 SunScreen 3.1 Administration Guide 806-4127 Solaris Bandwidth Manager 1.6 System 806-4704 Administration Guide Configuration Sun Enterprise 10000 InterDomain Network 806-5230 Configuration Guide Sun StorEdge Instant Image 3.0 Configuration Guide 806-7676 viii Sun StorEdge Network Data Replicator 3.0 Configuration Guide • June 2001...
- Page 9 For the latest version of storage software documentation, go to: http://www.sun.com/products-n-solutions/hardware/docs/Software/ Fatbrain.com, an Internet professional bookstore, stocks select product documentation from Sun Microsystems, Inc. For a list of documents and how to order them, visit the Sun Documentation Center on Fatbrain.com at: http://www.fatbrain.com/documentation/sun...
- Page 10 Sun StorEdge Network Data Replicator 3.0 Configuration Guide • June 2001...
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Page 11: Overview
C H A P T E R Overview Caution – Do not install or use the Sun StorEdge Version 3.0 Core and data services software on servers in a Sun Cluster 3.0 environment. The Version 3.0 software is not co-existent with the Sun Cluster 3.0 environment. The Version 3.0 software is co-existent in the Sun Cluster 2.2 environment, where it will not interfere with failover. - Page 12 Note – You can also group volume sets according to their cluster or resource tag to perform replication in a Sun Cluster 2.2 or 3.0 Update 1 clustered environment only. Sun StorEdge Network Data Replicator 3.0 Configuration Guide • June 2001...
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Page 13: Supported Hardware And Software
One-to-many and multihop volume sets — The Sun SNDR software enables you to create one-to-many and multihop volume sets. In a one-to-many volume set, you can replicate data from one primary volume to many secondary volumes residing on one or more hosts. In a multihop set, the secondary host volume of one volume set can be the primary host volume of another volume set. -
Page 14: Network Multipathing
Network interface aggregation and Sun Trunking software and the native facilities provided in a Solaris operating network alternate pathing environment update. ™ Network encryption SunScreen Software Network bandwidth allocation Solaris Bandwidth Manager Sun StorEdge Network Data Replicator 3.0 Configuration Guide • June 2001... -
Page 15: Applications
Applications The Sun SNDR software provides protection of critical enterprise information. The following information types are candidates for remote replication: Database partitions and logs Data that is important for business continuance in a disaster situation The Sun SNDR software can be leveraged for additional applications, such as: Data migration Remote backup Remote data analysis... - Page 16 Instant Image SDBC SDBC NSCTL - NSCTL - Network storage Network storage Device driver Device driver control module control module Hardware Hardware The Sun SNDR Software Architecture FIGURE 1 Sun StorEdge Network Data Replicator 3.0 Configuration Guide • June 2001...
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Page 17: Configuration Considerations
C H A P T E R Configuration Considerations Volumes Eligible for Replication Generally, include the following critical volumes in the Sun SNDR configuration: Database and database management system (DBMS) logs (the total database or online DBMS log) Access control files You can exclude volumes from the Sun SNDR software configuration if they can be reconstructed at the recovery site or if they seldom change: Temporary volumes (such as those used in sort operations) -
Page 18: Choosing Volume Level Protection
2 - only write the bitmap on shutdown, so a full resync is required after a crash, but an update resync is required after a reboot. rdc_bitmap_mode=0; Sun StorEdge Network Data Replicator 3.0 Configuration Guide • June 2001... -
Page 19: Choosing A Connection Medium To Link My Sites
If your server is configured in a clustered environment, set the bitmap mode to 1. If your server is not configured in a clustered environment, you can also choose the bitmap mode setting of 1 to improve error or disaster recovery. Choosing a Connection Medium to Link My Sites The primary and secondary sites must be connected by a standard medium that... -
Page 20: Configuring Redundant Links Between Sites
SunScreen software is normally configured at the edge of the data center network. Of course, cooperating SunScreen software is required at each data center. Sun StorEdge Network Data Replicator 3.0 Configuration Guide • June 2001... -
Page 21: Choosing Between Synchronous And Asynchronous Replication
Choosing Between Synchronous and Asynchronous Replication In synchronous mode, a write operation is not confirmed as complete until the remote volume has been updated. Generally, synchronous mirroring is limited to relatively short distances (that is, tens of kilometers) because of the detrimental effect of round-trip propagation delay on I/O response times. -
Page 22: When To Suspend Replication To The Secondary Site
Mutual replication might be used where critical applications and storage are split across sites, and both sites require remote replicated volumes. Sun StorEdge Network Data Replicator 3.0 Configuration Guide • June 2001... -
Page 23: Order-Dependent Writes And Volume Set Grouping
Order-Dependent Writes and Volume Set Grouping For the Sun SNDR Version 2.0 software, write ordering is only maintained by the Sun SNDR software within a logical volume. In Version 3.0, write ordering is also maintained for groups of asynchronously replicating volume sets. (The general definition of write ordering here is that write operations directed to the target volume occur in the same order as write operations to the source.) The group of target volumes is a point-in-time copy of the group of source volumes. -
Page 24: Recovery Considerations
Recovery Considerations The Sun StorEdge Network Data Replicator 3.0 System Administrator’s Guide contains information about various recovery scenarios. This section describes the following topics: Failing Over to the Secondary Site Recovering the Primary or Secondary Site Using The Sun SNDR and Sun StorEdge Instant Image Software... - Page 25 Choosing the Resynchronization Type: Update or Full Tip – If a synchronization initiated by the sndradm -m or sndradm -m -r commands is interrupted, use the sndradm -m -u update command to complete the synchronization. Use /usr/opt/SUNWscm/sbin/scmadm -S to view the synchronization progress. An update resynchronization applies changes that occurred at the primary data to the secondary site during the time replication was suspended.
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Page 26: Using The Sun Sndr And Sun Storedge Instant Image Software
Additionally, a point-in-time snapshot at the secondary site can be used for applications such as remote backup, remote data analysis, or other functions. Sun StorEdge Network Data Replicator 3.0 Configuration Guide • June 2001... -
Page 27: Sun Sndr Software And Sun Storedge Fast Write Cache Software
Sun SNDR Software and Sun StorEdge Fast Write Cache Software Note – You cannot use the Sun StorEdge Fast Write Cache (FWC) product, including the SUNWnvm Version 3.0 software, in a Sun Cluster environment because cached data is inaccessible from other machines in a cluster. To compensate, you can use a caching array, such as the Sun StorEdge A3500 disk array. -
Page 28: One-To-Many And Multihop Volume Sets
Secondary host volume /dev/rdsk/c0t0d0s5 /dev/rdsk/c0t0d0s5 /dev/rdsk/c0t0d0s5 One volume set Another volume set A = Primary host volume B = Secondary host volume One-to-Many and Multihop Volume Sets FIGURE 1 Sun StorEdge Network Data Replicator 3.0 Configuration Guide • June 2001... -
Page 29: Using The Sun Sndr Software In A Firewall Environment
Using The Sun SNDR Software in a Firewall Environment You can use the Sun SNDR software with any enhanced network product that Sun offers. Port 121 must be available for use by the Sun SNDR sndrd daemon. You can use IP masquerading. SNDR uses connection-oriented service (COTS) based remote procedure calls (RPC;... - Page 30 Sun StorEdge Network Data Replicator 3.0 Configuration Guide • June 2001...
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