nosql
NoSQL
CAP
- Consistency
- Availability
- Partition tolerance
각각 조합에 대한 예:
- AP: Dynamo, Cassandra, SimpleDB, CouchDB
- CA: Aster Data, Greenplum
- CP: BigTable, Hbase, MongoDB, Redis, MemcacheDB
BASE
- Basically Available
- Soft-state
- Eventually consistency
PACELC
if there is a partition (P) how does the system tradeoff between availability and consistency (A and C); else (E) when the system is running as normal in the absence of partitions, how does the system tradeoff between latency (L) and consistency ©?
- Hbase : PC/EC
- Cassandra : PA/EL
Data Model
- relational
- key-value
- column-oriented/tabular
- document-oriented
Data Type
- scalar: number, string, etc
- multi-valued: sets
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