我们遇到了查询性能问题。当我们运行查询 JanusGraph Hooked

【问题标题】：We met the query performance issue. While we run the query JanusGraph Hooked我们遇到了查询性能问题。当我们运行查询 JanusGraph Hooked
【发布时间】：2018-01-15 10:00:52
【问题描述】：

我们有以下图表数据。只有 5 个顶点，但我们有很多边。如何处理以下查询？我想获取从一个节点到另一个节点的路径。或者我只是想获得自行车道。

suresh       = graph.addVertex(label,'person','uuid','7bff1bc0-cef1-1033-8f28-d99da6cfd8a9')
robin_niu    = graph.addVertex(label,'person','uuid','e3348740-d37f-1031-8b5b-89fbb6fdad64')
hujunjie     = graph.addVertex(label,'person','uuid','5e5139c0-dbe7-102e-8780-bedba724cbf7')
clintpollitt = graph.addVertex(label,'person','uuid','d92c6340-f98b-1035-85d7-bee5d5cc5ebe')
yanjuqi      = graph.addVertex(label,'person','uuid','2d9fba40-74c7-1033-8e84-d3a6c90ad2e9')

suresh.addEdge('Communication',robin_niu,'date','2017-11-01T00:00:00Z','weight',1)
suresh.addEdge('Communication',robin_niu,'date','2017-11-02T00:00:00Z','weight',1)
suresh.addEdge('Communication',robin_niu,'date','2017-11-03T00:00:00Z','weight',1)
suresh.addEdge('Communication',robin_niu,'date','2017-11-04T00:00:00Z','weight',1)
suresh.addEdge('Communication',robin_niu,'date','2017-11-05T00:00:00Z','weight',1)
suresh.addEdge('Communication',hujunjie,'date','2017-12-01T00:00:00Z','weight',1)
suresh.addEdge('Communication',hujunjie,'date','2017-12-02T00:00:00Z','weight',1)
suresh.addEdge('Communication',hujunjie,'date','2017-12-03T00:00:00Z','weight',1)
suresh.addEdge('Communication',hujunjie,'date','2017-12-04T00:00:00Z','weight',1)
suresh.addEdge('Communication',hujunjie,'date','2017-12-05T00:00:00Z','weight',1)
suresh.addEdge('Communication',yanjuqi,'date','2017-10-01T00:00:00Z','weight',1)
suresh.addEdge('Communication',yanjuqi,'date','2017-10-02T00:00:00Z','weight',1)
suresh.addEdge('Communication',yanjuqi,'date','2017-10-03T00:00:00Z','weight',1)
suresh.addEdge('Communication',yanjuqi,'date','2017-10-04T00:00:00Z','weight',1)
suresh.addEdge('Communication',yanjuqi,'date','2017-10-05T00:00:00Z','weight',1)
suresh.addEdge('Communication',yanjuqi,'date','2017-01-01T00:00:00Z','weight',1)
suresh.addEdge('Communication',yanjuqi,'date','2017-01-02T00:00:00Z','weight',1)
suresh.addEdge('Communication',yanjuqi,'date','2017-01-03T00:00:00Z','weight',1)
suresh.addEdge('Communication',yanjuqi,'date','2017-01-04T00:00:00Z','weight',1)
suresh.addEdge('Communication',yanjuqi,'date','2017-01-05T00:00:00Z','weight',1)
suresh.addEdge('Communication',yanjuqi,'date','2017-11-01T00:00:00Z','weight',1)
suresh.addEdge('Communication',yanjuqi,'date','2017-11-02T00:00:00Z','weight',1)
suresh.addEdge('Communication',yanjuqi,'date','2017-11-03T00:00:00Z','weight',1)
suresh.addEdge('Communication',yanjuqi,'date','2017-11-04T00:00:00Z','weight',1)
suresh.addEdge('Communication',yanjuqi,'date','2017-11-05T00:00:00Z','weight',1)
suresh.addEdge('Communication',yanjuqi,'date','2017-12-01T00:00:00Z','weight',1)
suresh.addEdge('Communication',yanjuqi,'date','2017-12-02T00:00:00Z','weight',1)
suresh.addEdge('Communication',yanjuqi,'date','2017-12-03T00:00:00Z','weight',1)
suresh.addEdge('Communication',yanjuqi,'date','2017-12-04T00:00:00Z','weight',1)
suresh.addEdge('Communication',yanjuqi,'date','2017-12-05T00:00:00Z','weight',1)
suresh.addEdge('Communication',yanjuqi,'date','2017-12-05T00:00:00Z','weight',1)
suresh.addEdge('ProfilesReportingToChain',clintpollitt,'date','2016-12-01T00:00:00Z','weight',5)
suresh.addEdge('Communication',clintpollitt,'date','2017-11-01T00:00:00Z','weight',1)
suresh.addEdge('Communication',clintpollitt,'date','2017-11-01T00:00:00Z','weight',1)
suresh.addEdge('Communication',clintpollitt,'date','2017-11-01T00:00:00Z','weight',1)
suresh.addEdge('Communication',clintpollitt,'date','2017-11-01T00:00:00Z','weight',1)
suresh.addEdge('Communication',clintpollitt,'date','2017-11-01T00:00:00Z','weight',1)
suresh.addEdge('Communication',clintpollitt,'date','2017-11-01T00:00:00Z','weight',1)
suresh.addEdge('Communication',clintpollitt,'date','2017-11-01T00:00:00Z','weight',1)
suresh.addEdge('Communication',clintpollitt,'date','2017-11-01T00:00:00Z','weight',1)
suresh.addEdge('Communication',clintpollitt,'date','2017-11-01T00:00:00Z','weight',1)
suresh.addEdge('Communication',clintpollitt,'date','2017-11-01T00:00:00Z','weight',1)
suresh.addEdge('Communication',clintpollitt,'date','2017-11-01T00:00:00Z','weight',1)
suresh.addEdge('Communication',clintpollitt,'date','2017-11-01T00:00:00Z','weight',1)
suresh.addEdge('Communication',clintpollitt,'date','2017-11-01T00:00:00Z','weight',1)
suresh.addEdge('Communication',clintpollitt,'date','2017-11-02T00:00:00Z','weight',1)
suresh.addEdge('Communication',clintpollitt,'date','2017-11-02T00:00:00Z','weight',1)
suresh.addEdge('Communication',clintpollitt,'date','2017-11-02T00:00:00Z','weight',1)
suresh.addEdge('Communication',clintpollitt,'date','2017-11-02T00:00:00Z','weight',1)
suresh.addEdge('Communication',clintpollitt,'date','2017-11-02T00:00:00Z','weight',1)
suresh.addEdge('Communication',clintpollitt,'date','2017-11-02T00:00:00Z','weight',1)
suresh.addEdge('Communication',clintpollitt,'date','2017-11-02T00:00:00Z','weight',1)
suresh.addEdge('Communication',clintpollitt,'date','2017-11-02T00:00:00Z','weight',1)
suresh.addEdge('Communication',clintpollitt,'date','2017-11-02T00:00:00Z','weight',1)
suresh.addEdge('Communication',clintpollitt,'date','2017-11-02T00:00:00Z','weight',1)
suresh.addEdge('Communication',clintpollitt,'date','2017-11-02T00:00:00Z','weight',1)
suresh.addEdge('Communication',clintpollitt,'date','2017-11-02T00:00:00Z','weight',1)
suresh.addEdge('Communication',clintpollitt,'date','2017-11-02T00:00:00Z','weight',1)
suresh.addEdge('Communication',clintpollitt,'date','2017-11-02T00:00:00Z','weight',1)
suresh.addEdge('Communication',clintpollitt,'date','2017-11-02T00:00:00Z','weight',1)
suresh.addEdge('Communication',clintpollitt,'date','2017-11-02T00:00:00Z','weight',1)
suresh.addEdge('Communication',clintpollitt,'date','2017-11-02T00:00:00Z','weight',1)
suresh.addEdge('Communication',clintpollitt,'date','2017-11-02T00:00:00Z','weight',1)
suresh.addEdge('Communication',clintpollitt,'date','2017-11-02T00:00:00Z','weight',1)
suresh.addEdge('Communication',clintpollitt,'date','2017-11-02T00:00:00Z','weight',1)
suresh.addEdge('Communication',clintpollitt,'date','2017-11-02T00:00:00Z','weight',1)
suresh.addEdge('Communication',clintpollitt,'date','2017-11-02T00:00:00Z','weight',1)
suresh.addEdge('Communication',clintpollitt,'date','2017-11-02T00:00:00Z','weight',1)
suresh.addEdge('Communication',clintpollitt,'date','2017-11-02T00:00:00Z','weight',1)
suresh.addEdge('Communication',clintpollitt,'date','2017-11-11T00:00:00Z','weight',1)
suresh.addEdge('Communication',clintpollitt,'date','2017-11-11T00:00:00Z','weight',1)
suresh.addEdge('Communication',clintpollitt,'date','2017-11-11T00:00:00Z','weight',1)
suresh.addEdge('Communication',clintpollitt,'date','2017-11-11T00:00:00Z','weight',1)
suresh.addEdge('Communication',clintpollitt,'date','2017-11-11T00:00:00Z','weight',1)
suresh.addEdge('Communication',clintpollitt,'date','2017-11-11T00:00:00Z','weight',1)
suresh.addEdge('Communication',clintpollitt,'date','2017-11-11T00:00:00Z','weight',1)
suresh.addEdge('Communication',clintpollitt,'date','2017-11-11T00:00:00Z','weight',1)
suresh.addEdge('Communication',clintpollitt,'date','2017-11-11T00:00:00Z','weight',1)
suresh.addEdge('Communication',clintpollitt,'date','2017-11-11T00:00:00Z','weight',1)
suresh.addEdge('Communication',clintpollitt,'date','2017-11-11T00:00:00Z','weight',1)
suresh.addEdge('Communication',clintpollitt,'date','2017-11-11T00:00:00Z','weight',1)
suresh.addEdge('Communication',clintpollitt,'date','2017-11-11T00:00:00Z','weight',1)
suresh.addEdge('Communication',clintpollitt,'date','2017-11-11T00:00:00Z','weight',1)
suresh.addEdge('Communication',clintpollitt,'date','2017-11-11T00:00:00Z','weight',1)
suresh.addEdge('Communication',clintpollitt,'date','2017-11-11T00:00:00Z','weight',1)
suresh.addEdge('Communication',clintpollitt,'date','2017-11-11T00:00:00Z','weight',1)
suresh.addEdge('Communication',clintpollitt,'date','2017-11-11T00:00:00Z','weight',1)
suresh.addEdge('Communication',clintpollitt,'date','2017-11-11T00:00:00Z','weight',1)
suresh.addEdge('Communication',clintpollitt,'date','2017-11-11T00:00:00Z','weight',1)
suresh.addEdge('Communication',clintpollitt,'date','2017-11-11T00:00:00Z','weight',1)
suresh.addEdge('Communication',clintpollitt,'date','2017-11-11T00:00:00Z','weight',1)
suresh.addEdge('Communication',clintpollitt,'date','2017-11-11T00:00:00Z','weight',1)

clintpollitt.addEdge('Communication',robin_niu,'date','2017-12-01T00:00:00Z','weight',1)
clintpollitt.addEdge('Communication',robin_niu,'date','2017-12-02T00:00:00Z','weight',1)
clintpollitt.addEdge('Communication',robin_niu,'date','2017-12-03T00:00:00Z','weight',1)
clintpollitt.addEdge('Communication',hujunjie,'date','2017-11-01T00:00:00Z','weight',1)
clintpollitt.addEdge('Communication',hujunjie,'date','2017-12-02T00:00:00Z','weight',1)
clintpollitt.addEdge('Communication',hujunjie,'date','2017-10-03T00:00:00Z','weight',1)
clintpollitt.addEdge('Communication',hujunjie,'date','2017-12-04T00:00:00Z','weight',1)
clintpollitt.addEdge('Communication',hujunjie,'date','2017-12-05T00:00:00Z','weight',1)
clintpollitt.addEdge('Communication',yanjuqi,'date','2017-10-01T00:00:00Z','weight',1)
clintpollitt.addEdge('Communication',yanjuqi,'date','2017-10-02T00:00:00Z','weight',1)
clintpollitt.addEdge('Communication',yanjuqi,'date','2017-10-03T00:00:00Z','weight',1)
clintpollitt.addEdge('Communication',yanjuqi,'date','2017-10-04T00:00:00Z','weight',1)
clintpollitt.addEdge('Communication',yanjuqi,'date','2017-10-05T00:00:00Z','weight',1)
clintpollitt.addEdge('Communication',yanjuqi,'date','2017-01-01T00:00:00Z','weight',1)
clintpollitt.addEdge('Communication',yanjuqi,'date','2017-01-02T00:00:00Z','weight',1)
clintpollitt.addEdge('Communication',yanjuqi,'date','2017-01-03T00:00:00Z','weight',1)
clintpollitt.addEdge('Communication',yanjuqi,'date','2017-01-04T00:00:00Z','weight',1)
clintpollitt.addEdge('Communication',yanjuqi,'date','2017-01-05T00:00:00Z','weight',1)
clintpollitt.addEdge('Communication',yanjuqi,'date','2017-11-01T00:00:00Z','weight',1)
clintpollitt.addEdge('Communication',yanjuqi,'date','2017-11-02T00:00:00Z','weight',1)
clintpollitt.addEdge('Communication',yanjuqi,'date','2017-11-03T00:00:00Z','weight',1)
clintpollitt.addEdge('Communication',yanjuqi,'date','2017-11-04T00:00:00Z','weight',1)
clintpollitt.addEdge('Communication',yanjuqi,'date','2017-11-05T00:00:00Z','weight',1)
clintpollitt.addEdge('Communication',suresh,'date','2017-11-01T00:00:00Z','weight',1)
clintpollitt.addEdge('Communication',suresh,'date','2017-11-01T00:00:00Z','weight',1)
clintpollitt.addEdge('Communication',suresh,'date','2017-11-01T00:00:00Z','weight',1)
clintpollitt.addEdge('Communication',suresh,'date','2017-11-01T00:00:00Z','weight',1)
clintpollitt.addEdge('Communication',suresh,'date','2017-11-01T00:00:00Z','weight',1)
clintpollitt.addEdge('Communication',suresh,'date','2017-11-02T00:00:00Z','weight',1)
clintpollitt.addEdge('Communication',suresh,'date','2017-11-02T00:00:00Z','weight',1)
clintpollitt.addEdge('Communication',suresh,'date','2017-11-02T00:00:00Z','weight',1)
clintpollitt.addEdge('Communication',suresh,'date','2017-11-02T00:00:00Z','weight',1)
clintpollitt.addEdge('Communication',suresh,'date','2017-11-02T00:00:00Z','weight',1)
clintpollitt.addEdge('Communication',suresh,'date','2017-11-02T00:00:00Z','weight',1)
clintpollitt.addEdge('Communication',suresh,'date','2017-11-02T00:00:00Z','weight',1)
clintpollitt.addEdge('Communication',suresh,'date','2017-11-02T00:00:00Z','weight',1)
clintpollitt.addEdge('Communication',suresh,'date','2017-11-02T00:00:00Z','weight',1)
clintpollitt.addEdge('Communication',suresh,'date','2017-11-02T00:00:00Z','weight',1)
clintpollitt.addEdge('Communication',suresh,'date','2017-11-02T00:00:00Z','weight',1)
clintpollitt.addEdge('Communication',suresh,'date','2017-11-02T00:00:00Z','weight',1)
clintpollitt.addEdge('Communication',suresh,'date','2017-11-11T00:00:00Z','weight',1)
clintpollitt.addEdge('Communication',suresh,'date','2017-11-11T00:00:00Z','weight',1)
clintpollitt.addEdge('Communication',suresh,'date','2017-11-11T00:00:00Z','weight',1)

yanjuqi.addEdge('Communication',robin_niu,'date','2017-12-11T00:00:00Z','weight',1)
yanjuqi.addEdge('Communication',robin_niu,'date','2017-12-12T00:00:00Z','weight',1)
yanjuqi.addEdge('Communication',robin_niu,'date','2017-12-13T00:00:00Z','weight',1)
yanjuqi.addEdge('Communication',hujunjie,'date','2017-11-11T00:00:00Z','weight',1)
yanjuqi.addEdge('Communication',hujunjie,'date','2017-12-12T00:00:00Z','weight',1)
yanjuqi.addEdge('Communication',hujunjie,'date','2017-10-13T00:00:00Z','weight',1)
yanjuqi.addEdge('Communication',hujunjie,'date','2017-12-14T00:00:00Z','weight',1)
yanjuqi.addEdge('Communication',hujunjie,'date','2017-12-15T00:00:00Z','weight',1)
yanjuqi.addEdge('Communication',clintpollitt,'date','2017-10-01T00:00:00Z','weight',1)
yanjuqi.addEdge('Communication',clintpollitt,'date','2017-10-02T00:00:00Z','weight',1)
yanjuqi.addEdge('Communication',clintpollitt,'date','2017-10-03T00:00:00Z','weight',1)
yanjuqi.addEdge('Communication',clintpollitt,'date','2017-10-04T00:00:00Z','weight',1)
yanjuqi.addEdge('Communication',suresh,'date','2017-10-05T00:00:00Z','weight',1)
yanjuqi.addEdge('Communication',suresh,'date','2017-01-01T00:00:00Z','weight',1)

robin_niu.addEdge('Communication',hujunjie,'date','2017-12-11T00:00:00Z','weight',1)
robin_niu.addEdge('Communication',hujunjie,'date','2017-12-12T00:00:00Z','weight',1)
robin_niu.addEdge('Communication',hujunjie,'date','2017-12-13T00:00:00Z','weight',1)
robin_niu.addEdge('Communication',hujunjie,'date','2017-11-11T00:00:00Z','weight',1)
robin_niu.addEdge('Communication',hujunjie,'date','2017-12-12T00:00:00Z','weight',1)
robin_niu.addEdge('Communication',hujunjie,'date','2017-10-13T00:00:00Z','weight',1)
robin_niu.addEdge('Communication',yanjuqi,'date','2017-12-14T00:00:00Z','weight',1)
robin_niu.addEdge('Communication',yanjuqi,'date','2017-12-15T00:00:00Z','weight',1)
robin_niu.addEdge('Communication',clintpollitt,'date','2017-10-01T00:00:00Z','weight',1)
robin_niu.addEdge('Communication',suresh,'date','2017-11-01T00:00:00Z','weight',1)
robin_niu.addEdge('Communication',suresh,'date','2017-01-01T00:00:00Z','weight',1)
robin_niu.addEdge('ProfilesReportingToChain',yanjuqi,'date','2017-10-02T00:00:00Z','weight',5)
robin_niu.addEdge('ProfilesColleague',hujunjie,'date','2017-10-03T00:00:00Z','weight',2)

hujunjie.addEdge('Communication',robin_niu,'date','2017-12-11T00:00:00Z','weight',1)
hujunjie.addEdge('Communication',robin_niu,'date','2017-12-12T00:00:00Z','weight',1)
hujunjie.addEdge('Communication',clintpollitt,'date','2017-12-13T00:00:00Z','weight',1)
hujunjie.addEdge('Communication',clintpollitt,'date','2017-11-11T00:00:00Z','weight',1)
hujunjie.addEdge('Communication',clintpollitt,'date','2017-12-12T00:00:00Z','weight',1)
hujunjie.addEdge('Communication',suresh,'date','2017-10-13T00:00:00Z','weight',1)
hujunjie.addEdge('Communication',suresh,'date','2017-11-01T00:00:00Z','weight',1)
hujunjie.addEdge('Communication',suresh,'date','2017-01-01T00:00:00Z','weight',1)
hujunjie.addEdge('Communication',yanjuqi,'date','2017-12-14T00:00:00Z','weight',1)
hujunjie.addEdge('Communication',yanjuqi,'date','2017-12-15T00:00:00Z','weight',1)
hujunjie.addEdge('Communication',yanjuqi,'date','2017-10-01T00:00:00Z','weight',1)
hujunjie.addEdge('ProfilesReportingToChain',yanjuqi,'date','2016-10-02T00:00:00Z','weight',5)
hujunjie.addEdge('ProfilesColleague',robin_niu,'date','2017-10-03T00:00:00Z','weight',2)

我想获取从一个节点到另一个节点的路径。

以下 2 个查询不能很好地工作。我该如何解决这个问题？

g.V().has('uuid','e3348740-d37f-1031-8b5b-89fbb6fdad64').repeat(out()).until(has('uuid','2d9fba40-74c7-1033-8e84-d3a6c90ad2e9')).simplePath().path()


g.V().has('uuid','e3348740-d37f-1031-8b5b-89fbb6fdad64').as('v').
  repeat(outE().as('e').inV().as('v')).
    until(has('uuid','2d9fba40-74c7-1033-8e84-d3a6c90ad2e9')).
  store('a').
    by('uuid').
  store('a').
    by(select(all, 'v').unfold().values('uuid').fold()).
  store('a').
    by(select(all, 'e').unfold().
       store('x').
         by(union(values('weight'),
                  select('x').count(local)).fold()).
       cap('x').
       store('a').
         by(unfold().limit(local, 1).fold()).unfold().
       sack(assign).
         by(constant(1d)).
       sack(div).
         by(union(constant(1d),
                  tail(local, 1)).sum()).
       sack(mult).
         by(limit(local, 1)).
       sack().sum()).
  cap('a')

【问题讨论】：

  • 任何可以帮助我的人。非常感谢。我还尝试设置 uuid 索引。但它仍然不能很好地工作。
  • graph.tx().rollback() mgmt = graph.openManagement() uuid = mgmt.getPropertyKey('uuid') mgmt.buildIndex('byUuid',Vertex.class).addKey(uuid ).buildCompositeIndex() mgmt.commit() mgmt.awaitGraphIndexStatus(graph,'byUuid').call() mgmt.commit() mgmt.updateIndex(mgmt.getGraphIndex("byUuid"),SchemaAction.REINDEX).get() mgmt.commit()

标签： graph gremlin tinkerpop3 janusgraph


【解决方案1】：

我不完全理解你的问题，但我读它的意思是你想找到这些顶点之间的唯一路径，你可以得到：

gremlin> g.V().has('uuid','e3348740-d37f-1031-8b5b-89fbb6fdad64').
......1>   repeat(out().simplePath()).
......2>     until(has('uuid','2d9fba40-74c7-1033-8e84-d3a6c90ad2e9')).
......3>   path().
......4>   dedup()
==>[v[2],v[8]]
==>[v[2],v[4],v[8]]
==>[v[2],v[6],v[8]]
==>[v[2],v[0],v[8]]
==>[v[2],v[4],v[6],v[8]]
==>[v[2],v[4],v[0],v[8]]
==>[v[2],v[6],v[0],v[8]]
==>[v[2],v[6],v[4],v[8]]
==>[v[2],v[0],v[6],v[8]]
==>[v[2],v[0],v[4],v[8]]
==>[v[2],v[4],v[6],v[0],v[8]]
==>[v[2],v[4],v[0],v[6],v[8]]
==>[v[2],v[6],v[0],v[4],v[8]]
==>[v[2],v[6],v[4],v[0],v[8]]
==>[v[2],v[0],v[6],v[4],v[8]]
==>[v[2],v[0],v[4],v[6],v[8]]

当然，鉴于图表的结构，您必须遍历大量路径才能到达：

gremlin> g.V().has('uuid','e3348740-d37f-1031-8b5b-89fbb6fdad64').
......1>   repeat(out().simplePath()).
......2>     until(has('uuid','2d9fba40-74c7-1033-8e84-d3a6c90ad2e9')).
......3>   path().
......4>   count()
==>34794

我会进一步假设这是示例数据，您的实际数据可能有更多的评估路径。在考虑性能影响时，您需要密切关注这个数字以及在最坏的情况下可能会被遍历的边总数。请注意，索引对超出初始顶点查找的遍历没有帮助，但是，如果您要以某种方式进一步过滤路径以减少要从数据库返回的边数，则以顶点为中心的索引在这里可能会很有帮助（例如“找到我在 '2017-11-02T00:00:00Z' 上的所有路径”）。

【讨论】：

  • 嗨，斯蒂芬，另一个问题，我如何为边缘添加过滤器？只想对 g.V().has('uuid','e3348740-d37f-1031-8b5b-89fbb6fdad64') 的通信权重求和？
  • 您能否将其形成为一个新的 stackoverflow 问题并提供有关您具体想要什么的更多详细信息？我认为这个答案可能需要一种不同的遍历方法，因为这意味着包括边缘信息。
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