ElasticCache
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REDIS or Memcached for a stateless application - need to change the application code
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For Databases use Memcached – for more robust workloads use REDIS
REDIS
Multi AZ - Haley available
Read Replica
Data Precipitant - data can be backed-up and restored
MemCached
Multi Node , No data backup , Data Sharing
Cluster mode (REDIS):
Disabled
1 primary – 0- 5 replicas (sync) = scale read performance
- Horizontal = adding removing read replicas
- Vertical = change node type
Enabled
data is partitioned, multi-AZ, up to 500 node per cluster = scale writes
- Online (no downtime)
- Offline (downtime) – change note type, engine version