graph - Store and query property history with Neo4j

Question

I need to maintain a tree which contains nodes with attributes which are usually or strings, new attributes can be added to a node at runtime, etc. So a graph database like Neo4j is an obvious solution. But there is a slight twist: when an attribute is changed, I need to keep a record of its old value, and be able to efficiently query these old values (in particular, queries like "give me up 25 values of attribute X of node Y, starting from time Z" to support paging, and obviously "get latest value" needs to be efficient as well). What would be a good way to represent this?

Answer 1

TimelineIndex除了限制点击次数外，几乎可以满足我的需求。但是从 JavaDocIndexHits看来，如果我迭代尽可能多的我需要然后关闭迭代器，这似乎并不重要。

所以一个解决方案看起来像这样：将我需要历史记录的每个属性表示为节点；所以而不是

Sensor
-----
name = "battery"
measurement = 1

我有

Sensor           attr
-----            -+--> name = "measurement"
name = "battery"  |    value = 1
                  |    timestamp = 100000000
                  |
                  +--> name = "measurement"
                  |    value = 2
                  |    timestamp = 100000001
                  |
                  +--> name = "measurement"
                       value = 1
                       timestamp = 100000002

然后我TimelineIndex为每个Sensor节点和每个带有历史的属性维护一个。