Term | Description / Purpose | Example GCP Services / Features |
High Availability (HA) | System designed to operate continuously without failure for a long time. | Cloud SQL (HA Config), GKE Regional Clusters, Cloud Spanner |
Fault Tolerance | Ability of a system to continue operating properly even when part of the system fails. | Compute Engine MIG, Cloud Spanner, Cloud Storage Multi-Regional Buckets |
Disaster Recovery (DR) | Strategies & mechanisms to recover and restore data/systems after catastrophic failures. | Cloud Storage Backups, Snapshots, Cross-Region Replication |
Redundancy | Duplication of critical components to increase reliability. | Cloud Load Balancing, Regional Disks, Multi-zonal Deployments |
Failover | Automatic switching to a redundant/standby system upon failure. | Cloud SQL automatic failover, Cloud Spanner automatic failover |
Load Balancing | Even distribution of traffic across multiple resources to prevent overload. | Cloud Load Balancing (HTTP(S), TCP/UDP), Internal Load Balancer |
Scalability | Ability to handle increased load by adding resources. | GKE Autoscaling, Compute Engine MIG Autoscaling |
Elasticity | Dynamic adjustment of resources (scale in/out) to match demand. | GKE Cluster Autoscaler, Cloud Functions Auto-Scaling |
Durability | Guarantee that data will not be lost. | Cloud Storage (11 9’s durability), Persistent Disk Snapshots |
Replication | Copying data across multiple locations for availability and durability. | Cloud Spanner replication, Cloud SQL Read Replicas, Multi-Regional Storage |
Auto-Healing | Automatic detection and replacement of unhealthy resources. | Compute Engine Managed Instance Groups, GKE Node Auto-Repair |
Geo-Redundancy | Distributing resources/data across multiple geographic locations for maximum resilience. | Cloud Storage Multi-Regional, Cloud Spanner Multi-Regional |
Backup & Restore | Regular backups and ability to restore systems/data to a previous state. | Cloud SQL Backups, Persistent Disk Snapshots, GKE Backups |
RTO / RPO Compliance | Recovery Time Objective (RTO) and Recovery Point Objective (RPO) metrics for availability and disaster recovery planning. | Cloud Spanner, Cloud SQL, Disaster Recovery Strategies |
Zero Downtime | Achieving continuous availability without service interruption. | GKE Blue/Green Deployments, Rolling Updates |
Consistency | Ensuring data accuracy across distributed systems. | Cloud Spanner (Strong Consistency), Cloud SQL |
Multi-Zonal Deployment | Deploying resources across multiple zones within a region. | GKE Regional Clusters, MIGs |
Multi-Regional Deployment | Deploying resources across multiple regions to maximize availability. | Cloud Storage Multi-Regional Buckets, Cloud Spanner Multi-Regional |
SLA (Service Level Agreement) | Commitment on uptime & reliability levels from GCP. | Compute Engine SLA, Cloud Storage SLA, Cloud SQL SLA |
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