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Questions tagged [nebula-graph]

NebulaGraph is an open source graph database solution. Use this tag for any questions that relate to using NebulaGraph as the database of your project. Any bugs or feature requests should be reported through the Nebula Graph GitHub issue tracker.

NebulaGraph is an open-source distributed graph database solution.

Use this tag for any questions relating to using NebulaGraph as your project's graph database. Any bugs or feature requests should be reported through the NebulaGraph GitHub issue tracker.

Find more about NebulaGraph Database at:

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Memory Usage Issue in NebulaGraph

Nebula version: 3.6.0 Memory: 1.5T Data volume: Approximately 500 million nodes During storage, Nebula Storage occupies 70% of the memory. When querying all nodes, the memory becomes full and Nebula Graph occupies the majority of the memory space.…
Wey Wang
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When using NebulaGraph NQL, an error occurs when trying to re-add a deleted attribute in a tag using the DROP statement

When using Nebula NQL, an error occurs when trying to re-add a deleted attribute in a tag using the DROP statement. enter image description here I have previously deleted these two attributes using the DROP statement, and I can confirm that the…
Zhuanmin Zhang
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How does NebulaGraph determine the direction of edges?

In NebulaGraph, the BIDIRECT keyword is used in GO statements to determine the direction of edges in a query. NebulaGraph uses GO statements in combination with BIDIRECT for bidirectional queries. To determine the direction of edges, you can use the…
XiaoXia Liang
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What if the data folder of a certain node in NebulaGraph is lost?

A node data folder in NebulaGraph is missing. Can I copy data from other nodes? Nebula version: v3.5.0 Deployment method: Distributed Installation method: Docker Production environment or not: Y Hardware Information Disk SATA 64C 128G There are…
GraceChaya
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NebulaGraph attribute setting Format int8 int16 int32 int64 Is there any difference in storage space?

nebula version: 3.5.0 Deployment method: stand-alone Installation method: Docker Whether to use the production environment: N hardware information: Disk (SSD recommended) CPU, memory information specific description of the problem I saw that…
Danmei Li
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Does rocksdb in NebulaGraph have an option to close or control the disk space preoccupied by its .log file?

Recently, we found that the .log file of rocksdb, the underlying storage engine of Nebula, takes up much more disk space when viewed with du or ls -s than the file size viewed with ls -dl. It has been observed that a 5MB .log file takes up 72MB of…
Danmei Li
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NebulaGraph-bench importer fails

nebula version: v3.5.0 Deployment method: cloud / distributed / stand-alone (distributed) Installation method: source code compilation / Docker / RPM (source code compilation) Whether to use the production environment: Y / N (y) hardware…
Danmei Li
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NebulaGraph Community Edition Query Causes Database Crash

match p=(v:Person{name:“Lily”})-[*]->() return p When querying, graphd directly crashes, using the community version 3.5 What should I do at this time? There is another question: Excuse me, the hard disk of the server is full, how to expand the…
Wey Wang
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NebulaGraph Production Environment Deployment Scale Evaluation

how do you roughly evaluate hardware resources when deploying a Nebula cluster? For example, to store 10 million points and 1 trillion edges, assuming each point has only one Tag, how many nodes should be used at least, and what should be the…
Zhuanmin Zhang
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How does NebulaGraph set the log level of rocksdb to WARN or higher?

Recently, we found that the log files of rocksdb, Nebula's backend storage engine, sometimes take up a lot of disk space, especially when there is a lot of graph space. Because each graph space will have a set of rocksdb log files, the default log…
XiaoXia Liang
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NebulaGraph concurrent execution timeout

Simultaneously execute 5000 concurrently nebula-console -addr 192.168.10.8 -port 9669 -u Joe -p Joespassword -e "go statement" There will be a timeout problem. If you set -t 600000, an error will still be reported. How to deal with it to ensure that…
XiaoXia Liang
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NebulaGraph query timeout Storage Error: RPC failure, probably timeout

nebula version: 3.5 Deployment method: stand-alone Installation method: RPM Whether to use the production environment: N Hardware information: memory 62G - Specific description of the problem When doing a query, it can still be queried when the…
XiaoXia Liang
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Cannot run program “python” problem occurs when NebulaGraph imports data./run.sh

nebula version: (In order to save the time for the respondent to check the version information, remember to display the version information of the first post in the form of a screenshot) Deployment method: cloud / distributed / stand-alone…
GraceChaya
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Can NebulaGraph control the total log file capacity and write log files cyclically?

After the Nebula environment we are deploying runs for a long time, the log files of graphd and storage are sometimes very large, tens to hundreds of GB, and there is a risk of filling up the disk. We are using the Nebula V3.0.0 community edition,…
GraceChaya
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NebulaGraph massive data query timeout and future cluster planning consultation

nebula version: 3.5 Deployment method: stand-alone Installation method: RPM Whether to use the production environment: N hardware information Memory: 64G enter image description here specific description of the problem There are about 4 million…
GraceChaya
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