The downside of agent-based replication is the management and cost overheads involved in keeping the agents up-to-date. Conversely, agentless replication, by its very nature, avoids these overheads providing a much cheaper solution. However, it also requires systems to be offline while backup is taking place, which for critical systems is often unacceptable.
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Businesses need to weigh up the added cost of agent-based replication against its benefits in order to decide whether having systems offline is acceptable. In general, if a system is business-critical, it should use agent-based replication. For non-critical or remote systems, short offline periods are no great problem, and agentless replication should be used.
Related Q&A from Chris Reid
Chris Reid, consultant with Morse, looks at the pros and cons of inline and post-process data deduplication.continue reading