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Re: [Titan, Cassandra] Query performance degrades with network latency between Cassandra nodes
It depends on your replication factor. If you didn't set it explicitly, the default RF=1. As you add nodes and the data gets distributed across the Cassandra nodes, the coordinator may need to connect
It depends on your replication factor. If you didn't set it explicitly, the default RF=1. As you add nodes and the data gets distributed across the Cassandra nodes, the coordinator may need to connect
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By
Jason Plurad <plu...@...>
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#66
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Re: Loading Janus DB from a distributed program
Thanks, this worked perfectly. The JanusGraphTransaction object also has a getVertices method which allows me to fetch them by ID. Performance seems pretty good on the small set of data I have, ill
Thanks, this worked perfectly. The JanusGraphTransaction object also has a getVertices method which allows me to fetch them by ID. Performance seems pretty good on the small set of data I have, ill
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By
robk...@...
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#67
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Re: [Titan, Cassandra] Query performance degrades with network latency between Cassandra nodes
This is a two node cassandra cluster with Netwoktopology strategy. The data ownership is 100% on both the nodes.
KEYSPACE my_ks;
CREATE KEYSPACE my_ks WITH replication = {'class':
This is a two node cassandra cluster with Netwoktopology strategy. The data ownership is 100% on both the nodes.
KEYSPACE my_ks;
CREATE KEYSPACE my_ks WITH replication = {'class':
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By
bdi...@...
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#68
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Extract and Store Subgraph - Example
Hi,
I'm using Gremlin Server in the JanusGraph package and trying to extract a subgraph.
:> sg =
Hi,
I'm using Gremlin Server in the JanusGraph package and trying to extract a subgraph.
:> sg =
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By
Ravee <raveendranat...@...>
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#69
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Latest supported versions of backends
Hi,
I was previously using Titan and now I migrated my code to JanusGraph. I'm still using it with the latest Titan supported versions of the backends (as written here:
Hi,
I was previously using Titan and now I migrated my code to JanusGraph. I'm still using it with the latest Titan supported versions of the backends (as written here:
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By
Gabriel Campero Durand <gabriel...@...>
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#70
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Re: Extract and Store Subgraph - Example
Can you provide more details on what is going wrong? It is a bit hard to debug your situation without any graph data.
I tried this...
$ ./bin/janusgraph.sh start
Forking Cassandra...
Running
Can you provide more details on what is going wrong? It is a bit hard to debug your situation without any graph data.
I tried this...
$ ./bin/janusgraph.sh start
Forking Cassandra...
Running
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By
Jason Plurad <plu...@...>
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#71
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Re: Latest supported versions of backends
This is the Issue that tracks it before the first release comes out.
https://github.com/JanusGraph/janusgraph/issues/102
Thanks,
Jerry
This is the Issue that tracks it before the first release comes out.
https://github.com/JanusGraph/janusgraph/issues/102
Thanks,
Jerry
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By
Jerry He <jerr...@...>
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#72
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Re: Latest supported versions of backends
Hi Jerry,
Thanks for your answer. I'll keep in the loop with this one.
In the meantime, I'll stick to the old versions.
Best,
Gabriel.
Hi Jerry,
Thanks for your answer. I'll keep in the loop with this one.
In the meantime, I'll stick to the old versions.
Best,
Gabriel.
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By
Gabriel Campero Durand <gabriel...@...>
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#73
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Recommendations for bulk delete of edges
Hi,
I have been using Titan for a while and have recently moved to Janusgraph. Thanks for revitalising the project!
I am using Janusgraph to look at social chat that is generating approximately 7
Hi,
I have been using Titan for a while and have recently moved to Janusgraph. Thanks for revitalising the project!
I am using Janusgraph to look at social chat that is generating approximately 7
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By
ke...@...
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#74
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Re: Recommendations for bulk delete of edges
I'm not sure I would use bothE(). Have you tried just outE()?
I would be curious to see if it's querying that's slow or if it's dropping. Try using profile() or using time of count() instead of
I'm not sure I would use bothE(). Have you tried just outE()?
I would be curious to see if it's querying that's slow or if it's dropping. Try using profile() or using time of count() instead of
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By
Robert Dale <rob...@...>
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#75
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Re: Recommendations for bulk delete of edges
Hi Kevin,
By an "elasticsearch index" you do mean a mixed index, don't you?
Actually, indexing does not help you too much, because your query still hits 1/7 of your edgestore. The way to go here is to
Hi Kevin,
By an "elasticsearch index" you do mean a mixed index, don't you?
Actually, indexing does not help you too much, because your query still hits 1/7 of your edgestore. The way to go here is to
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By
HadoopMarc <m.c.d...@...>
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#76
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Re: Recommendations for bulk delete of edges
Thanks Robert,
I will follow the path you have suggested and see what that I can achieve. The problem with the g.V() queries is that it is iterating over all vertices, so it is fast when I first
Thanks Robert,
I will follow the path you have suggested and see what that I can achieve. The problem with the g.V() queries is that it is iterating over all vertices, so it is fast when I first
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By
ke...@...
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#77
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Re: Recommendations for bulk delete of edges
Hi Marc,
Thanks for this. Yes it is a mixed index with elasticsearch as the backend. I've thought about the poor man's approach and I'm going to give that a try. In fact I can probably query
Hi Marc,
Thanks for this. Yes it is a mixed index with elasticsearch as the backend. I've thought about the poor man's approach and I'm going to give that a try. In fact I can probably query
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By
ke...@...
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#78
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Calling a SparkGraphComputer from within Spark
Hi,
I have a Spark-based program, which writes vertices and edges to a JanusGraph cluster (Cassandra backend). Once the write is complete, I would like to execute an OLAP traversal for all vertices,
Hi,
I have a Spark-based program, which writes vertices and edges to a JanusGraph cluster (Cassandra backend). Once the write is complete, I would like to execute an OLAP traversal for all vertices,
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By
robk...@...
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#79
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Re: Recommendations for bulk delete of edges
I'm definitely not a Titan/Janus or ES expert so I'm not sure how it works. But I imagine if you had an index by label, timestamp, asc, then you would only ever hit the tip of the index
I'm definitely not a Titan/Janus or ES expert so I'm not sure how it works. But I imagine if you had an index by label, timestamp, asc, then you would only ever hit the tip of the index
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By
Robert Dale <rob...@...>
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#80
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Re: Recommendations for bulk delete of edges
These are all good suggestions. Not sure if it would be feasible to recreate your db, but if it was, you may be able to use edge TTLs:
These are all good suggestions. Not sure if it would be feasible to recreate your db, but if it was, you may be able to use edge TTLs:
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By
Ted Wilmes <twi...@...>
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#81
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Re: Unique composite index with label constraint - issue?
Hi Ivan,
When I first read your question on March 6 I thought this one was not for me, but I see now that you still did not get an answer. I agree it looks suspicious, but there is still one thing I
Hi Ivan,
When I first read your question on March 6 I thought this one was not for me, but I see now that you still did not get an answer. I agree it looks suspicious, but there is still one thing I
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By
HadoopMarc <m.c.d...@...>
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#82
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Re: Calling a SparkGraphComputer from within Spark
Hi Rob,
Documentation is not abundant on this, I agree. So I read through the spark-gremlin source code and saw that SparkGraphComputer can reuse the SparkContext using the
Hi Rob,
Documentation is not abundant on this, I agree. So I read through the spark-gremlin source code and saw that SparkGraphComputer can reuse the SparkContext using the
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By
HadoopMarc <m.c.d...@...>
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#83
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Re: Calling a SparkGraphComputer from within Spark
Thanks (again!) for the quick response. I've got Gremlin to use the existing SparkContext successfully.
I'm trying to test this, however I'm also finding triggering the traversal from Scala
Thanks (again!) for the quick response. I've got Gremlin to use the existing SparkContext successfully.
I'm trying to test this, however I'm also finding triggering the traversal from Scala
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By
robk...@...
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#84
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Re: Calling a SparkGraphComputer from within Spark
Hi Rob,
Yes, you are diving in, I read. JanusGraph data are available as HadoopGraph using the HBaseInputFormat and CassandraInputFormat classes. You can find examples on the old Titan forum,
Hi Rob,
Yes, you are diving in, I read. JanusGraph data are available as HadoopGraph using the HBaseInputFormat and CassandraInputFormat classes. You can find examples on the old Titan forum,
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By
HadoopMarc <m.c.d...@...>
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#85
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