liliang199的专栏

Titan基于HDFS和Spark的批量数据导入 顶点集out_edges.txt 边集out_vertices.txt 解析脚本vertices.groovy，edges.groovy 导入脚本hadoop-script-load-example.groovy

spark.MapOutputTrackerMasterActor: Map output statuses were 14371441 bytes which exceeds spark.akka.frameSize (10485760 bytes). org.apache.spark.SparkException: Map output statuses were 14371441 bytes which exceeds spark.akka.frameSize (10485760 bytes).

2017-10-25 17:34:04,137 FATAL [regionserver60020] regionserver.HRegionServer: ABORTING region server bionode1,60020,1508924043337: Unhandled: org.apache.hadoop.hbase.ClockOutOfSyncException: Server bionode1,60020,1508924043337 has been rejected; Reported t

1 通过nc命令检查远程端口是否打开 $ nc -w 5  211.100.98.99 22 SSH-2.0-OpenSSH_6.6.1 如果没有输出，则任务端口没有开放 2. 通过nmap检查远程端口是否打开 $ nmap 124.16.144.32 -p 80 Starting Nmap 7.12 ( https://nmap.org ) at 2018-01-08

1 JanusGraph设置 1) 下载 janusgraph-0.2.2-hadoop2 https://github.com/JanusGraph/janusgraph/releases 2） 启动Cassadra、ElasticSearch、GremlinServer bin/janusgraph.sh start 3）初始化数据 打开gremlin终端，运行如下命令 gr...

1  设置边的数组属性 CREATE (n:Person { name: 'tom', title: 'Developer' }) CREATE (n:Person { name: 'john', title: 'Developer' }) create (a:Person{name:"tom"})-[r:RELTYPE{rtype:["r1", "r1"]}]->(b:Person{n...