karthikraju Posts - Answer Overflow

karthikraju

•Created by karthikraju on 10/15/2024 in #questions

Unable to use text predicates like 'textContains' in gremlin python

I know that it's already mentioned in the janusgraph documentation that these predicates are not supported by gremlin python because they aren't supported by tinkergraph either. I saw in this thread: https://discord.com/channels/981533699378135051/1176188416078139503 that we should write our own serializer and if it's the only way to get it working or is there any alternative

3 replies

JJanusGraph

•Created by karthikraju on 10/2/2024 in #questions

Unable to run two instances of janusgraph using scylla as the storage backend in docker

I am trying to setup two different instances of janusgraph with scylla as the backend but I am not able to get it working.

2 replies

JJanusGraph

•Created by karthikraju on 9/24/2024 in #questions

Need advice on setting up janusgraph as a microservice

I am trying to build a recommendation system using janusgraph. I already have setup one janusgraph instance with an index backend for just the product and its related entities. Now, I need to add the users to the mix as well. But, I am confused as to whether introduce the User vertices in the product graph instance or should make a separate graph altogether. The reason for wanting a new instance for the users is that, there is a community feature that is included as well where creating personalities based on that user graph will becomes crucial. If I do make two different services what would be a good way of communicating between the two graphs?

4 replies

JJanusGraph

•Created by karthikraju on 9/16/2024 in #questions

Syncing data between MongoDB and Janusgraph

My primary data source is MongoDB where collections are already. I need a way to sync the data from MongoDB to Jansugraph. The manual way of doing this is using MongoDB oplogs but I would like to know if there are any other better options before I get into that.

1 replies

JJanusGraph

•Created by karthikraju on 9/13/2024 in #questions

Indexes are not being used even after enabling

I have setup one composite index, one mixed index and one relation index. Although all of them have the 'ENABLED' status, the queries are still doing a full scan. I have attached the schema. Here is the query that I am trying to execute:

gremlin> g.V().has('_id', '66b0dc9f2bd5e4709894fc29').profile()
==>Traversal Metrics
Step                                                               Count  Traversers       Time (ms)    % Dur
=============================================================================================================
JanusGraphStep([],[_id.eq(66b0dc9f2bd5e4709894f...                     1           1         101.875   100.00
  constructGraphCentricQuery                                                                   0.103
  constructGraphCentricQuery                                                                   0.017
  GraphCentricQuery                                                                          101.534
    \_condition=(_id = 66b0dc9f2bd5e4709894fc29)
    \_orders=[]
    \_isFitted=false
    \_isOrdered=true
    \_query=[]
    scan                                                                                     101.341
      \_query=[]
      \_fullscan=true
      \_condition=VERTEX
                                            >TOTAL                     -           -         101.875        -

gremlin> g.V().has('_id', '66b0dc9f2bd5e4709894fc29').profile()
==>Traversal Metrics
Step                                                               Count  Traversers       Time (ms)    % Dur
=============================================================================================================
JanusGraphStep([],[_id.eq(66b0dc9f2bd5e4709894f...                     1           1         101.875   100.00
  constructGraphCentricQuery                                                                   0.103
  constructGraphCentricQuery                                                                   0.017
  GraphCentricQuery                                                                          101.534
    \_condition=(_id = 66b0dc9f2bd5e4709894fc29)
    \_orders=[]
    \_isFitted=false
    \_isOrdered=true
    \_query=[]
    scan                                                                                     101.341
      \_query=[]
      \_fullscan=true
      \_condition=VERTEX
                                            >TOTAL                     -           -         101.875        -

9 replies

JJanusGraph

•Created by karthikraju on 8/16/2024 in #questions

Is there a way to connect janusgraph to an existing opensearch instance as the index backend?

I have an opensearch instance running already which I want to also use as the index backend for janusgraph.

      janusgraph.index.search.backend: elasticsearch
      janusgraph.index.search.hostname: <my-opensearch-hostname>:9200

      janusgraph.index.search.backend: elasticsearch
      janusgraph.index.search.hostname: <my-opensearch-hostname>:9200

But this doesn't work and I get the error: java.lang.IllegalArgumentException: Unsupported Elasticsearch server major version: 2.14.0 Any help would be appreciated. Thank you!

2 replies

JJanusGraph

•Created by karthikraju on 8/8/2024 in #questions

What would be the ideal way to set up deep learning on janusgraph data?

I have setup a simple knowledge graph on janusgraph and I wanted to use the data to train a deep learning model. I found DGL(https://dglke.dgl.ai/doc/index.html) library which seems to be used mostly. I am not sure how I should go about this. DGL accepts training data as a simple comma seperated strings which defines the from_vertex, relationship and the to_vertex ex: "London", "isCapitalOf", "UK" I have multiple relationships and eventually want to get embeddings of the data and use them for recommendations with vector similarity search. Any help would be appreciated. Thank you

5 replies

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