这样就完成了一次高效的查询操作,相比于之前3次完全独立的查询调用。 目前此方面的改进在JIRAHDFS-13616:Batch listing of multiple directories。 另外,根据HDFS-13616上面的讨论,此部分改进在元数据的loading过程中会有近10到20倍的性能提升。 Batch-List API在DFSClient.java中的定义如下: publicBatchedDirectoryListin...
命令ID。 您可以通过调用 ListCommands 获取命令 ID。 c-hz01v8x80o3*** InvokeRecordStatus string 否 需要查询的命令的运行状态。取值范围: Finished:已结束 Running:运行中 Failed:运行失败 Stopped:已停止 Finished PageNumber integer 否 当前页码。 起始值:1 默认值:1 1 PageSize integer 否 每页显示的行...
SeaweedFS - SeaweedFS is an open source distributed file system supporting WebDAV, S3 API, FUSE mount, HDFS, etc, optimized for lots of small files, and easy to add capacity. Apache-2.0 Go SFTPGo - Flexible, fully featured and highly configurable SFTP server with optional FTP/S and WebDAV ...
winner - [built-in]“Undo”(and “redo”) changes in the window configuration with the key commands. golden-ratio.el - Automatically resizes windows based on the golden ratio. ElScreen - Utility for multiple screens. Zoom - Fixed and automatic balanced window layout for Emacs....
List of Apache Hadoop hdfs commands Apache Hadoop : Creating Wordcount Java Project with Eclipse Part 1 Apache Hadoop : Creating Wordcount Java Project with Eclipse Part 2 Apache Hadoop : Creating Card Java Project with Eclipse using Cloudera VM UnoExample for CDH5 - local run Apache Hadoop...
2200+亿 commands/day 5000亿Read/day 500亿Write/day 18TB+ Memory 500+ Servers in 6 IDC 2000+instances 应该是国内外比较大的Redis使用平台,今天主要从应用角度谈谈Redis服务平台。 Redis使用场景 1.Counting(计数) 计数的应用在另外一篇文章里较详细的描述,计数场景的优化http://www.xdata.me/?p=262这里就...
<property> <name>dfs.namenode.audit.log.debug.cmdlist</name> <value>getfileinfo,liststatus</value> <description> A comma separated list of NameNode commands that are written to the HDFS namenode audit log only if the audit log level is debug....
Hadoop - Hadoop/HDFS. Onyx - Distributed, masterless, high performance, fault tolerant data processing. Written entirely in Clojure. Spark - Spark is a fast and general engine for large-scale data processing. Storm - Storm is a distributed realtime computation system. Impala - Real-time Query ...
The array of connection types. Accepted values are: AMAZON_KINESIS, AMAZON_REDSHIFT, AMAZON_S3, AZURE_DATA_LAKE_STORAGE, AZURE_SYNAPSE_ANALYTICS, DATABRICKS, DB2, ELASTICSEARCH, GENERIC, GOLDENGATE, GOOGLE_BIGQUERY, GOOGLE_CLOUD_STORAGE, GOOGLE_PUBSUB, HDFS, JAVA_MESSAGE_SERVICE, KAFKA, KAFKA_SC...
Hadoop - Hadoop/HDFS. Onyx - Distributed, masterless, high performance, fault tolerant data processing. Written entirely in Clojure. Spark - Spark is a fast and general engine for large-scale data processing. Storm - Storm is a distributed realtime computation system. Impala - Real-time Query ...