What is a characteristic of triangle/multitarget replication?

Question

Exhibit

Options

• AFailover can occur to either of the two remote sites
• BDistance between all sites must be less than 125 km
• CBunker site must be in sync with the remote site at all times
• DOnly the production site is available during normal operations

• A
  80% (37)
• B
  2% (1)
• C
  4% (2)
• D
  13% (6)

Explanation

Three-site triangle/multitarget replication In three-site triangle/multitarget replication, data at the source storage array is concurrently replicated to two different arrays at two different sites, as shown in the figure on the slide. The source-to-bunker site (target 1) replication is synchronous with a near-zero RPO. The source-to- remote site (target 2) replication is asynchronous with an RPO in the order of minutes. The distance between the source and the remote sites could be thousands of miles. This implementation does not depend on the bunker site for updating data on the remote site because data is asynchronously copied to the remote site directly from the source. The triangle/multitarget configuration provides consistent RPO unlike cascade/multihop solutions in which the failure of the bunker site results in the remote site falling behind and the RPO increasing. The key benefit of three-site triangle/multitarget replication is the ability to failover to either of the two remote sites in the case of source-site failure, with disaster recovery (asynchronous) protection between the bunker and remote sites. Disaster recovery protection is always available if any one-site failure occurs.

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