A production scenario is used to illustrate the purpose and function of Datacenter Activation Coordination Protocol (DACP) when an entire site goes off line.
- [Instructor] The principle of quorum is clearly important…in maintaining reliable mailbox databases.…However all magic comes at a price.…Consider this not-so-unusual scenario:…Landon Hotels has two exchange servers…in their onsite datacenter.…These servers are part of a database availability group…which includes a witness server that's also located onsite.…In an effort to remain highly available,…two more exchange servers are brought online…in an offsite datacenter.…
They're also part of the same DAG.…This looks like a good plan.…There are an even number of exchange servers,…so the witness server aligns itself…with one of the onsite servers…and that helps maintain quorum.…Now suppose we have a power issue at our onsite datacenter…and the power's been out for almost an hour…and since we don't anticipate it being restored anytime soon…and the UPS won't last forever,…we made the tough decision to take down…the onsite exchange servers and the network equipment.…
Now the high availability features…are going to have a problem.…
AuthorScott M Burrell
- Planning and managing database storage
- Setting database requirements
- Storage architecture
- Virtualization scenarios
- Creating and managing mailbox databases
- Failure domains and SLA requirements
- Proper placement of a file share witness
- Site resilient DAG
- Troubleshooting database replication, performance, and database failure
- Planning for SLA recovery requirements
Skill Level Intermediate
Deploying Exchange Server 2016with Robert McMillen3h 1m Intermediate
Exchange 2016: Client Access Serviceswith Scott M Burrell1h 50m Intermediate
Exchange 2016: Transport Serviceswith Scott M Burrell2h 24m Intermediate
1. Plan and Manage Database Storage
2. High Availability Mailbox Databases
3. Site Resilient DAG
4. Troubleshooting Mailbox Databases
5. Backup and Recovery Solutions
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