Thank you for your further comments. I'm still a bit confused though. Janus advertises itself as a database for huge graphs. But I'm asking myself if it means huge "homogeneous" graphs (ie. a simple

Hi Laura, Things are a bit different than you ask: a vertex has a single label only a property key has a single datatype only, but it can be Object.class, see

Hi Laura, Many people use CSV for data and JSON for schemas (in other graph databases too). Not sure what will be the most "standard" or "efficient" approach, but CSV/JSON seems to be most common.

All the examples that I see in the Janus documentation seem to use Groovy. Instructions such as JanusGraphFactory.open(), graph.openManagement(), mgmt.makeEdgeLabel() etc. Is there any human-friendly

Thank you Marc, I think it does indeed! If I understand correctly, I can use labels to "namespace" my nodes, or in other words as a way to identify subgraphs. If I have a node with 2 labels instead,

Hi Laura, Good that you pay close attention to understanding indices in JanusGraph because they are essential to proper use. Does the following section of the ref docs answers your

Thank you Boxuan Li, It is obvious that your are an expert, is any other way apart of isFitted=true to know that index is used or not? (It may be even debugging JanusGraph server or Cassandra) We

I'm new to Janus and LPGs. I have a question after reading the Janus documentation. As far as I understand, edges labels as well as properties (for both nodes and edges) are indexed globally. What

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Hi Christopher, isFitted = true basically means no in-memory filtering is needed. If you see isFitted = false, it does not necessarily mean vertex-centric indexes are not used. It could be the case

Pawan, I was able to make your code work. the problem is "setStartTimeNow()" Instead use setStartTime(Instant.now()) and test. It works. I am yet to explore difference between two api. make sure to

Thanks a lot for responding Marc. Yes, I had initially tried setting spark.yarn.archive with the path to spark-gremlin.zip. However with this approach, the containers were failing with the message

Hi Manabu, Yes, providing an example graph works much better in exploring the problem space. I am afraid, though, that I did not find much that will help you out. on a single machine with cassandra

In the mean time I found that the difference between profile() and currentTimeMillis can be much larger. Apparently, the profile() step takes into account that for real queries, vertices are not

Hi, Can anyone explain why the total duration displayed by the profile() step is more than twice as large as the time difference clocked with System.currentTimeMillis? see below, For those who wonder,

Hi Roy, I think I would first check whether the skew is absent if you count the rows reading the HBase table directly from spark (so, without using janusgraph),

Hi Varun, Good job. However, your last solution will only work with everything running on a single machine. So, indeed, there is something wrong with the contents of spark-gremlin.zip or with the way

Thank you Marc. I was able to reduce the tasks by adjusting the `num_tokens` settings on Cassandra. Still unsure about why each task takes so long though. Hoping that this a per-task overhead that

Answering my own question. I was able fix the above error and successfully run the count job after explicitly adding /Users/my_comp/Downloads/janusgraph-0.5.2/lib/* to

An update on this, I tried setting the env var below: export HADOOP_GREMLIN_LIBS=$GREMLIN_HOME/lib After doing this I was able to successfully run the tinkerpop-modern.kryo example from the Recipes