Nebula Graph Community Meeting Archive

Meeting Archive

2022-05-04(UTC)

https://youtu.be/-1X3pKVRk8U

Topics

• Ad-hoc Topic: Nebula Graph 3.1.0 Overview
• Open floors for a sync discussion/Q&A - 5 mins

Participants

• wey gu
• Tiago Peczenyj

2022-04-20(UTC)

https://youtu.be/o_-e0yqCxJE

Topics

• Project heartbeats - 5 mins

• #4098 RETURN extract(a.player.name, "\\w+") by @wuxiaobai24
  • Extract the substring that matches the regular expression from the string
• #4095 Refactor FIND PATH:
  • reduced RAM usage of allPath & multiPairShortestPath
  • reduced data copying by integrating conjunct path into the path operator
• #4131 Disk fault recovery improved with multiple data path awareness
• #4129 Single server now supports auto adding hosts
• #4146 Optimizer refactor:
  • now only release symbols of top layer nodes in all matched nodes
• #4162 PATH optimizer refactored:
  • redundant path removed, time complexity reduced

• Ad-hoc Topic: Spark on Nebula Graph - 10 mins
• Open floors for a sync discussion/Q&A - 5 mins

Participants

• wey gu

2022-04-06(UTC)

recording: https://youtu.be/P9NoHLRi85Q

• Core

  • https://github.com/vesoft-inc/nebula/pull/3997 support match (v:player) where (v)-[:like]->() return v now
  • https://github.com/vesoft-inc/nebula/pull/3929 support match (v)-->(v) now
  • https://github.com/vesoft-inc/nebula/pull/4067 support failed info in SHOW JOB
  • More comments https://github.com/vesoft-inc/nebula/issues/3677
  • Fixed version in docker image
  • https://github.com/vesoft-inc/nebula/pull/4085 more information on show job <>
  • https://github.com/vesoft-inc/nebula/pull/4088 , https://github.com/vesoft-inc/nebula/pull/4017 balance data
  • https://github.com/vesoft-inc/nebula/pull/4100 notice in service status for not added hosts

• Release of 3.0.2 with arm docker build

• others

  • nebula-operator supports v3.0+ now

• Ad-hoc topic: Nebula on a Pi Board

---

2022-03-23(UTC)

Participants:

• @wey-gu
• @porscheme

📺 recording: - https://youtu.be/tJ4EVPelw38

🚩 Project Heartbeat

• #3993 Something error when the version of tag/edge schema is greater than 256

• #3946, #4060 UDF progress

• #4063 Query optimization summary based on cache experiment

• #3771 persist learner info

• #4030 refactor: use STL facilities instead of 3rd party libraries(Jun)

• Feature:

  • #3989 clear space

• Others

  • #3905 console in binary packages
  • Nebula .net, Nebula jdbc with 3.0.0 supported

Ad-hoc topic

How I use Knowledge Graph to help solve Chinese Wordle

---

2022-03-09(UTC)

Participants:

- wey gu
- lisa liu

recording: - https://youtu.be/y1M-8mW5YSs

Project Heartbeat

Interesting ISSUE:

• https://github.com/vesoft-inc/nebula/issues/3941 thread pool perf
• https://github.com/vesoft-inc/nebula/issues/3940 multi-get rocksDB Surrounding Merged:
• https://github.com/vesoft-inc/nebula-third-party/pull/37 arm build supported
• https://github.com/vesoft-inc/nebula-operator/pull/117 Operator: Helm Auth supported Core Merged:
• https://github.com/vesoft-inc/nebula/pull/3904 use one global lock in meta
• https://github.com/vesoft-inc/nebula/pull/3896 permission for kill queries
• https://github.com/vesoft-inc/nebula/pull/3913 auto_remove_invalid_space default true
• https://github.com/vesoft-inc/nebula/pull/3839 https://github.com/vesoft-inc/nebula/issues/2533 GetProps supports Limit push down

Ad-hoc: the workflow of contributing to nebula-graph core.

---

2022-02-23(UTC)

Participants:

- wey gu
- wei sheng

recording: - https://youtu.be/jDdbsntxoZA

Project Heartbeat

• 3.0 Released 🚩! https://nebula-graph.io/posts/nebula-graph-v3.0.0-release-note/

• Master Core

  • Prop pruner nebula/pull/3750
  • --disable_page_cache nebula/pull/3890
  • GetProps LIMIT push down nebula/pull/3839

• Spark-Connector and Algo(2.6.2)/Exchange(2.6.3)

  • fixed address invalid when it's domain name

• Nebula-Contrib

  • php, .net, nodejs client moved here

Topic: Nebula Graph Index Explained

• 📚 https://www.siwei.io/en/nebula-index-explained/

---

2022-02-08(UTC)

Participants:

- wey gu
- hera han
- jamie liu

recording: - https://youtu.be/hlNzrbqTcP4

Project Heartbeat

• 2.6.2 Core released 🚩nebula/releases/tag/v2.6.2

  • fixed memeory issue/CGROUPv2 issue/full-text index issue

• Master Core

  • Snowflake ID supported in UUID() nebula/pull/3500
  • Single Server(standalone) Support nebula/pull/3310
  • fixed a backup issue if after v2 -> v3 upgrade nebula/pull/3855

• ⎈ K8s Operator nebula-operator/pull/109

  • unsatisfiableAction, configuration for POD Spread Constraint

• 3.1.0 project created: 📅 https://github.com/orgs/vesoft-inc/projects/28/views/6

• nebula-agent v0.1.0 released nebula-agent/releases/tag/v0.1.0

Ad-hoc topic: Nebula Spark-Connector/Nebula-Algorithm in K8s

• Arch. of Nebula Graph
• How Nebula Services are landed in K8s
• Service Discovery in Nebula
• Nebula-Algorithm config explained
• How-to & Hands-on 🏂🏻
  • wey-gu/nebula-operator-kind 👉🏻 #whats-next

---

2022-01-26(UTC)

Topics

Community meeting kick-off and way of working - 5 mins - wey Project heartbeats - 5 mins - wey

Participants:

- wey

recording: - https://youtu.be/7IiPAJ66IZg

PR:

• LDBC test cases introduced: https://github.com/vesoft-inc/nebula/pull/3537
• K6 supports Nebula Graph v1: https://github.com/vesoft-inc/k6-plugin/tree/nebula_v1
• SHOW HOSTS now reports version: https://github.com/vesoft-inc/nebula/pull/3702
• Configurable max_expression_depth: https://github.com/vesoft-inc/nebula/pull/3722
• Limit number of sessions per client: https://github.com/vesoft-inc/nebula/pull/3729
• PostgreSQL support in exchange: https://github.com/vesoft-inc/nebula-exchange/pull/62

Threads:

• Dgraph Data Import to Nebula Graph

  • option 0 https://github.com/vesoft-inc/nebula-exchange/issues/57
    • nebula-spark-connector & dgraph-spark-connector
  • option 1 https://github.com/jievince/rdf-converter

• Why is nebula in python slow?

  • https://discuss.nebula-graph.com.cn/t/topic/7285 (Chinese, but with python code)
  • TL;DR:
    • CPU-bound in case of huge returning data(unserilzation), multi-process should be considerred
    • IO-bound in case of long query(like count(*)), multi-thread helps only in this case

• GraphD crash on CGROUPv2 OS/Container host OS

  • https://github.com/vesoft-inc/nebula/issues/3278
  • 2.6.2 is on the way