Exchange Disaster Recovery with SANRAD V-Switch Planning Guide
Below is a MRR and PLR article in category Computers Technology -> subcategory Other.
Exchange Disaster Recovery with SANRAD V-Switch: A Planning Guide
Overview
Designing a disaster recovery system requires careful planning to meet your company's specific needs, SLAs, and budget constraints. This guide is designed to assist you in creating an Exchange disaster recovery plan using SANRAD Replication. It assumes you have a basic understanding of SANRAD V-Switch and Exchange Administration.
Key Considerations for Exchange Disaster Recovery
General Considerations
When combining SANRAD replication with Microsoft Exchange Server, consider the following:
- Budget: Your financial resources will influence your design choices.
- Recovery Time Objective (RTO): How quickly you need to have data back online.
- Recovery Point Objective (RPO): How much data loss is acceptable.
- Network Bandwidth: The capacity between local and remote sites.
- Replication Method: Choose between synchronous and asynchronous replication.
- Replication Frequency: Relevant for asynchronous replication.
- Initial Volume Synchronization: Essential for protecting existing Exchange data.
Recovery Time Objective (RTO)
A high RTO requires duplicate hardware for rapid recovery, which can be costly.
Recovery Point Objective (RPO)
Define RPO by how much data your company can afford to lose. High RPO demands more bandwidth, while low RPO may increase data loss risk due to less frequent replication.
Network Bandwidth
Bandwidth is crucial for replication. Consider:
- T1 Links (1.5Mb): Suitable for less frequent, asynchronous replication.
- T3 Links (45Mb) or 1Gb Links: Allow frequent replication, enabling a choice between synchronous and asynchronous methods.
Replication Method
- Synchronous Replication: Writes I/O commands simultaneously to local and remote volumes, requiring high bandwidth for fast acknowledgment.
- Asynchronous Replication: Writes commands to local and journal volumes, with periodic replication to remote sites. This method suits lower bandwidths, such as 1.5Mb.
For asynchronous replication, consider:
1. Network bandwidth.
2. Volume of data changes.
3. RPO requirements.
Initial Volume Synchronization
To protect existing Exchange data, initial synchronization is necessary, depending on:
- Volume size.
- Network bandwidth.
Methods:
- Online Synchronization: Begins immediately upon starting replication, using the same network link.- Offline Synchronization: A manual process requiring user intervention to synchronize remote site volumes.
Specific Considerations for Exchange
When planning Exchange disaster recovery, keep in mind:
- Quick access to the most recent Exchange database and logs. SANRAD provides fast remote access.
- The Exchange database and transaction logs must be replicated together, using consistency groups.
- Integration with Active Directory: Ensure a domain controller exists at the remote site or can be quickly established.
- Maintain the latest replicated Windows backup set, including system state, to expedite recovery.
By considering these factors, you'll be able to design a robust and effective disaster recovery plan for your Exchange server using SANRAD V-Switch.
You can find the original non-AI version of this article here: Exchange Disaster Recovery with SANRAD V-Switch Planning Guide.
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