12/1/2023 0 Comments Backup replicationAll database writes go to the primary member of the replica set and are quickly synced to all secondary members. The MongoDB feature that enables redundancy is called Replication.įor those not familiar, when you organize MongoDB into a replica set, all members of the set stay in sync. If a component becomes unavailable, a standby system takes over immediately and transparently. To insulate infrastructures from these completely inevitable events, we build redundancy into our systems. For example, you might decide you need to re-provision a machine with twice as much RAM.Īll these issues would lead to your system being unavailable. These issues impact cloud infrastructures as well, although in different ways. Sometimes your server runs out of space on its disk, at which point you’ll need to take it offline so you can install a bigger one. So do power supplies, network cards, and other individual machine components. All drives eventually fail, often without warning. ^1 Over time, infrastructures always suffer predictable failures that can impact this availability. The answer can be reduced to a single distinction: replication is for availability and backups are for disaster recovery.Īvailability is a measure of percentage of time an application is working and accessible to end users at full capacity. Doesn’t replication already protect their data sufficiently? Sometimes when MongoDB users evaluate Cloud Manager, they question whether they need a backup if they are already using replication.
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