Soláthraíonn Redis ardáil ar fáil trí atáirgeadh (cóipeanna macasamhla de na sonraí), Redis Sentinel (monatóireacht fhaillithe uathoibríoch), agus Redis Cluster (scagadh + atáirgeadh). Tá sé tábhachtach na nithe seo a thuiscint chun Redis a rith go iontaofa i dtáirgeadh.
Atáirgeadh — príomh agus macasamhla
PRIMARY (master) → handles writes; asynchronously replicates data to replicas
REPLICAS (slaves) → copies of the primary's data; can serve READS (read scaling)
Write → Primary → async replication → Replicas (eventually consistent)
✓ Redundancy (replicas have copies) + read scaling (reads offloaded to replicas)
✗ Replication is ASYNC → a small lag; a failover could lose very recent writes
