Difference between revisions of "NoSQL"
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| Line 4: | Line 4: | ||
*# Data model: ''(key, value)'' pairs | *# Data model: ''(key, value)'' pairs | ||
*# Operations: '''Insert'''(key, value), '''Fetch'''(key), '''Update'''(key), '''Delete'''(key) | *# Operations: '''Insert'''(key, value), '''Fetch'''(key), '''Update'''(key), '''Delete'''(key) | ||
| + | *# Some allow (non-uniform) '''columns''' <u>within value</u>. | ||
| + | *# Some allow Fetch on range of keys. | ||
*Implementation: efficiency, scalability, fault-tolerance | *Implementation: efficiency, scalability, fault-tolerance | ||
** Records distributed to nodes based on key | ** Records distributed to nodes based on key | ||
** Replication | ** Replication | ||
| − | ** Single-record | + | ** Single-record transactions, "eventual consistency". |
Revision as of 18:14, 17 November 2013
Key-Value Stores
- Interface: extremely simple
- Data model: (key, value) pairs
- Operations: Insert(key, value), Fetch(key), Update(key), Delete(key)
- Some allow (non-uniform) columns within value.
- Some allow Fetch on range of keys.
- Implementation: efficiency, scalability, fault-tolerance
- Records distributed to nodes based on key
- Replication
- Single-record transactions, "eventual consistency".