hbase monitoring

The problem is described in detail below:2016-12-09 15:10:39,160 ERROR [org.apache.hadoop.hbase.client.connectionmanager$hconnectionimplementation]- The node/hbase is not in ZooKeeper. It should has been written by the master. Check the value configured in ' Zookeeper.znode.parent '. There could is a mismatch with the one configured in the master.2016-12-09 15:10:39,264 ERROR [Org.apache.hadoop.hbase.client.connectionmanager$hconnectionimplementation

[email protected] conf]$ cat RegionserversHadoopmasterHadoopSlave1HadoopSlave2Export java_home=/home/hadoop/app/jdk1.7.0_79Export Hbase_manages_zk=falseHBase (main):002:0> create ' test_table ', ' F 'Package zhouls.bigdata.HbaseProject.Test1;Import org.apache.hadoop.conf.Configuration;Import org.apache.hadoop.hbase.HBaseConfiguration;Import Org.apache.hadoop.hbase.TableName;Import org.apache.hadoop.hbase.client.HTable;Import Org.apache.hadoop.hbase.client.Put;Import org.apache.hadoop.hbase.util.

how hbase is accessed1. Native Java API: The most conventional and efficient way to access;2, hbase shell:hbase command line tool, the simplest interface, suitable for hbase management use;3, Thrift Gateway: The use of Thrift serialization technology, support C++,php,python and other languages, suitable for other heterogeneous systems online access

distributed to other region servers for recovery. The Hlog file is an ordinary Hadoop Sequence file,sequence The key is the Hlogkey object, the Hlogkey records the attribution information written to the data, in addition to table and region names, but also includes Sequence number and Timestamp,timestamp are "write Time", the starting value of sequence is 0, or the last time the file system was deposited in sequence. The value of HLog sequece file is the KeyValue object of

results produced after map and reduce operations seem to have been written to hbase. However, when the files in hlog and storefile of hbase are flush to disk, these two files are stored in the HDFS datanode, and HDFS is permanently stored. 2. What is the relationship between zookeeper and hadoopcore and hbase? What services does zookeeper provide? They manage n

HBase version: 0.98.6Thrift Version: 0.9.0Use thrift client with Python to connect HBase error:1 Traceback (most recent):2File"D:\workspace\Python\py\helloworld.py", line 27,inch3tables =client.gettablenames ()4File"E:\mazhongsoft\python\lib\hbase\Hbase.py", line 788,inchGettablenames5 returnself.recv_gettablenames ()6File"E:\mazhongsoft\python\lib\

threads are suitable for scenarios with low memory consumption and high TPS requirements for a single request. When setting this value, the main reference is monitoring memory.Note that if the number of region servers is small and a large number of requests are on the same region, the read/write lock caused by memstore triggering flush will affect the global TPS, the higher the number of Io threads, the better.Enabling RPC-level logging is enabled du

for a single request. When setting this value, the main reference is monitoring memory. Note that if the number of region servers is small and a large number of requests are on the same region, the read/write lock caused by memstore triggering flush will affect the global TPS, the higher the number of Io threads, the better. Enabling RPC-level logging is enabled during stress testing to monitor the memory consumption and GC status of each request at

manually recovered, this balance action is meaningless, which will result in uneven load and bring more burden to RS. In particular, for scenarios with fixed regions allocation. Hbase. regionserver. handler. countDefault Value: 10Description: The number of I/O threads that the RegionServer requests process.Optimization:The optimization of this parameter is closely related to the memory.A small number of IO threads are suitable for Big PUT scenarios w

Data import./hbase org.apache.hadoop.hbase.mapreduce.Driver Import table name data file locationHdfsThe data file location can be prefixed file:///Otherwise, the HDFs address is accessed.Data export./hbase org.apache.hadoop.hbase.mapreduce.Driver Export table name data file locationEnter the shell command.cd/hbasehome/bin/CD./hbase Shell2016-05-20 15:36:32,370 IN

the following environment variable information is configured in the current user: Export hadoop_classpath= $HBASE _home/lib/*: CLASSPATH Then, execute the source command to make the contents of the configuration immediately effective.2.3. Perform a preview After the task has been successfully submitted, the Linux console will print the progress of the task, or you can view the progress of the execution in the yarn's resource

Use Ganglia to monitor Hadoop and HBase Clusters 1. Introduction to Ganglia Ganglia is an open-source monitoring project initiated by UC Berkeley designed to measure thousands of nodes. Each computer runs a gmond daemon that collects and sends metric data (such as processor speed and memory usage. It is collected from the operating system and the specified host. Hosts that receive all metric data can displa

Implement Hbase paging and Hbase Paging Author: Source of R xingyue: http://www.cnblogs.com/rxingyue. You are welcome to reprint it. Please keep this statement. Thank you! In a project, hbase paging is performed because the data volume is large and scheduled incremental analysis is required. The version used in the project is hbase1.1. Need to enable coprocessor

1.2. Quick Start-standalone HBase This guide describes setup of a standalone HBase instance running against the local filesystem. This isn't an appropriate configuration for a production instance of HBase, but would allow you to experiment with HBase. This section shows the Create a table in

I. Segmentation and distribution of large tablesThe tables in HBase are made up of rows and columns. Tables in HBase can be up to billions of rows and millions of columns. The size of each table can be up to terabytes, sometimes even petabytes. These tables are split into smaller units of data and then allocated to multiple servers. These smaller data units are called region. The server hosting region is ca

their latest status, ensuring that it is updated in real time, so that if more than one hmaster is started, it increases the active The burden of Hmaster. The previous article has introduced Hmaster's main use for hregion allocation and management, DDL (Data Definition Language, both table new, delete, modify, etc.) implementation, etc., it has two main responsibilities: Coordinating Hregionserver The hregion is allocated at startup, and the hregion is redistributed when loa

Hbase.client.scanner.cachingDefines the number of rows retrieved when the next method is called in the scanner. The larger the number, the fewer remote calls the client needs to make to the regionserver at the time of the scan. The larger the value, the larger the client consumes memory.Hbase.balancer.periodThe region equalizer runs periodically in HBase master. This property defines the time interval at which the equalizer runs, by default, 5 minutes

Written in front one: In this paper, hive and hbase are integrated so that hive can read the data in HBase, so that the two most commonly used frameworks in the Hadoop ecosystem are combined to complement each other. Written in front two: Use software description To contract all software storage directory: /home/yujianxin First, hive integrated hbase pr

balance (so that other RS can be restored Based on the wal logs recorded by the faulty machine ). When the faulty RS is manually recovered, this balance action is meaningless, which will result in uneven load and bring more burden to Rs. In particular, for scenarios with fixed regions allocation. Hbase. regionserver. handler. CountDefault Value: 10Description: The number of I/O threads that the regionserver requests process.Optimization:The optimizat

1. Under what conditions does splitpolicy meet? In version 0.94, the default value is increasingtoupperboundregionsplit1_y1) constantsizeregionsplitpolicy, 2) keyprefixregionsplitpolicy, 3) regionsplitpolicy, you can specify the policy implementation hbase in the configuration file. regionserver. region. split. policy. The default value is increasingtoupperboundregionsplitpolicy4) increasingtoupperboundregionsplitpolicy.