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Re: Run JanusGraph/Cassandra/ElasticSearch in production in a VM with 8GB/RAM
Hi, it does not seem impossible but you should really test it and ask yourself the questions:
do your really need gremlin to query your data (instead of SQL)?
do you really need Elasticsearch for
Hi, it does not seem impossible but you should really test it and ask yourself the questions:
do your really need gremlin to query your data (instead of SQL)?
do you really need Elasticsearch for
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By
HadoopMarc <bi...@...>
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#5362
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Run JanusGraph/Cassandra/ElasticSearch in production in a VM with 8GB/RAM
Hi, is possible to Run JanusGraph/Cassandra/ElasticSearch in production in a VM with 8GB/RAM?
The system has more reads than writes, we create 10 vertex per hour and the system has a average of 20
Hi, is possible to Run JanusGraph/Cassandra/ElasticSearch in production in a VM with 8GB/RAM?
The system has more reads than writes, we create 10 vertex per hour and the system has a average of 20
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By
"p...@pwill.com.br" <pw...@...>
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#5361
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Use index for sorting
Hello,
I'm using JanusGraph with Cassandra (0.5.2) and ElasticSearch.
I try to optimize my queries and use the mixed indexes as much as possible, in particular for sortings, but I have some
Hello,
I'm using JanusGraph with Cassandra (0.5.2) and ElasticSearch.
I try to optimize my queries and use the mixed indexes as much as possible, in particular for sortings, but I have some
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By
toom <to...@...>
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#5360
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Re: throw NullPointerException when query with hasLabel() script
it is reproducible in my environment. and this problem is not appeared when janusgraph server started.
it is always there after i running into it for the first time, continuing to now
i have another
it is reproducible in my environment. and this problem is not appeared when janusgraph server started.
it is always there after i running into it for the first time, continuing to now
i have another
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By
阳生丙 <ouyang....@...>
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#5359
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Re: OLAP, Hadoop, Spark and Cassandra
Hi Mladen,
Interesting read! Spark is not very sensitive to the number of tasks. I believe that for OLAP on HadoopGraph the optimum is for partitions of 256 Mb or so. Larger is difficult to hold in
Hi Mladen,
Interesting read! Spark is not very sensitive to the number of tasks. I believe that for OLAP on HadoopGraph the optimum is for partitions of 256 Mb or so. Larger is difficult to hold in
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By
HadoopMarc <bi...@...>
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#5358
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Re: SimplePath query is slower in 6 node vs 3 node Cassandra cluster
Hi Boxuan,
Thank you for getting back to me. Please find my responses below:
> Did you check the hardware differences?
Yes I can confirm that the two clusters are identical except for the number of
Hi Boxuan,
Thank you for getting back to me. Please find my responses below:
> Did you check the hardware differences?
Yes I can confirm that the two clusters are identical except for the number of
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By
Varun Ganesh <operatio...@...>
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#5357
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Re: OLAP, Hadoop, Spark and Cassandra
I know I'm quite late to the party, but for future reference - the number of input partitions in Spark depends on the partitioning of the source. In case of cassandra, partitioning is determined by
I know I'm quite late to the party, but for future reference - the number of input partitions in Spark depends on the partitioning of the source. In case of cassandra, partitioning is determined by
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By
Mladen Marović <mladen...@...>
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#5356
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HBase and Solr Standalone index not work
hello, I want to ask how to be able to index solr and hbase storage, because I tried that the data could only enter hbase but could not index data to solr, I used hbase version 2.1.0, zookeper version
hello, I want to ask how to be able to index solr and hbase storage, because I tried that the data could only enter hbase but could not index data to solr, I used hbase version 2.1.0, zookeper version
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By
sefty nindyastuti <sefty...@...>
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#5355
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Re: throw NullPointerException when query with hasLabel() script
Hi,
Can you please send something going wrong that is reproducible? Below you find an example on the latest janusgraph-full-0.5.2 where hasLabel() works fine.
marc:/tera/lib/janusgraph-full-0.5.2$
Hi,
Can you please send something going wrong that is reproducible? Below you find an example on the latest janusgraph-full-0.5.2 where hasLabel() works fine.
marc:/tera/lib/janusgraph-full-0.5.2$
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By
HadoopMarc <bi...@...>
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#5354
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Re: throw NullPointerException when query with hasLabel() script
to HadoopMarc:
it is not about double quote. the problem is: when gremlin script contains hasLabel() clause, janus server will throws NullPointerException.
i use console and gremlin driver to fire
to HadoopMarc:
it is not about double quote. the problem is: when gremlin script contains hasLabel() clause, janus server will throws NullPointerException.
i use console and gremlin driver to fire
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By
阳生丙 <ouyang....@...>
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#5353
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Re: Configuring Transaction Log feature
one correction to last post in below line.
JanusGraphTransaction tx = graph.buildTransaction().logIdentifier("TestLog").start();
one correction to last post in below line.
JanusGraphTransaction tx = graph.buildTransaction().logIdentifier("TestLog").start();
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By
Pawan Shriwas <shriwa...@...>
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#5350
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Re: Configuring Transaction Log feature
Hi Sandeep,
Please see below java code and properties information which I am trying in local with Cassandra cql as backend. This code is not giving me the change log as event which I can get via
Hi Sandeep,
Please see below java code and properties information which I am trying in local with Cassandra cql as backend. This code is not giving me the change log as event which I can get via
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By
Pawan Shriwas <shriwa...@...>
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#5349
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Re: Configuring Transaction Log feature
Pawan,
Can you elaborate more on the program where your are trying to embed the script in?
Regards,
Sandeep
Pawan,
Can you elaborate more on the program where your are trying to embed the script in?
Regards,
Sandeep
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By
Sandeep Mishra <sandy...@...>
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#5352
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Re: Configuring Transaction Log feature
Never worked with cassandra. Perhaps a base64 encoding is used for storing.
Never worked with cassandra. Perhaps a base64 encoding is used for storing.
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By
Sandeep Mishra <sandy...@...>
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#5351
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Re: Configuring Transaction Log feature
Hey Jason,
Same thing happen with my as well where above script work well in gremlin console but when we use it in java. we are not getting anything in process() section as callback. Could you help
Hey Jason,
Same thing happen with my as well where above script work well in gremlin console but when we use it in java. we are not getting anything in process() section as callback. Could you help
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By
Pawan Shriwas <shriwa...@...>
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#5348
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Re: throw NullPointerException when query with hasLabel() script
Hi,
Do you mean that the only difference between the first and the second script is the presence of the closing double quote? I see the stacktrace is from Gremlin Server: did you use Gremlin Console
Hi,
Do you mean that the only difference between the first and the second script is the presence of the closing double quote? I see the stacktrace is from Gremlin Server: did you use Gremlin Console
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By
HadoopMarc <bi...@...>
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#5347
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throw NullPointerException when query with hasLabel() script
query with gremlin script: "g.E().hasLabel('L2_LINK').has('prop1', 'prop1-value')"
the returned result is expected and correct.
but query with gremlin script: "g.E().hasLabel('L2_LINK').has('prop1',
query with gremlin script: "g.E().hasLabel('L2_LINK').has('prop1', 'prop1-value')"
the returned result is expected and correct.
but query with gremlin script: "g.E().hasLabel('L2_LINK').has('prop1',
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By
阳生丙 <ouyang....@...>
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#5346
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Re: Caused by: org.janusgraph.diskstorage.locking.PermanentLockingException: Expected value mismatch for KeyColumn
One more thing which i observed is if in the same transaction I try to change the objId property of vertices which has same value for objId, then commit is successful. But if i change the value in
One more thing which i observed is if in the same transaction I try to change the objId property of vertices which has same value for objId, then commit is successful. But if i change the value in
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By
"priy...@gmail.com" <priyanka...@...>
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#5344
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Re: SimplePath query is slower in 6 node vs 3 node Cassandra cluster
Hi,
> why the query is 3x slower on 6 nodes
Did you check the hardware differences? Probably the 6-node cluster has slower network, less memory, slower disk, etc.
Another possibility that I can think
Hi,
> why the query is 3x slower on 6 nodes
Did you check the hardware differences? Probably the 6-node cluster has slower network, less memory, slower disk, etc.
Another possibility that I can think
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By
BO XUAN LI <libo...@...>
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#5345
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Re: How to improve traversal query performance
Hi Manabu,
OK, I think for this graph structure your initial query is fine for getting the right output results. Still, to better understand the impact on the performance of using sack() you might
Hi Manabu,
OK, I think for this graph structure your initial query is fine for getting the right output results. Still, to better understand the impact on the performance of using sack() you might
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By
HadoopMarc <bi...@...>
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#5343
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