hbase structure

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HBASE Basic Structure

at this time.3) Wal splittingNo detailed documentation documentedSeven. RegionsRegions is highly available, with the basic elements of a distributed table, each column family (column family) a store (corresponding to a data file that we understand)(HBase table)Region (regions for the table)Store (store per columnfamily for each region for the table)Memstore (Memstore for each Store for each region for the table)StoreFile (Storefiles for each Store fo

NetEase Video Cloud: hbase– storage file hfile structure analysis

NetEase Video Cloud is a PAAs video cloud service launched by NetEase, which is mainly used in online education, live show, telemedicine, enterprise collaboration and other fields. Today, NetEase video cloud technology experts to share with you: hbase– storage file hfile structure analysis.Hfile is an organization of files for HBase to store data, referencing the

Hbase (2)-Data Storage Structure

Hbase terminology in this article:Column-based: column-orientedRow: RowColumn group: column familiesColumn: ColumnUnit: Cell The biggest difficulty in understanding hbase (an open-source Google bigtable application) is what is the concept of hbase's data structure? First, hbase is different from general relational dat

Hbase (3)-framework structure and process

Hbase relies on hadoop's HDFS as the storage base. Therefore, the structure is similar to hadoop's master-slave mode. hbase master server is responsible for managing all the hregion servers, however, the hbase master server does not store any data in hbase. The table in

HBase Introduction (3)---frame structure and process

HBase relies on Hadoop's HDFs as the storage base, so the structure is similar to the master-slave mode of Hadoop, and HBase master server manages all hregion servers, but HBase master The server itself does not store any data in HBase. The

Hbase-root-and. META. Table structure

In HBase, most of the operations are done in Regionserver, client side want to insert, delete, query data need to find the corresponding Regionserver first. What do you call a corresponding regionserver? is to manage the regionserver of the region you want to operate. The client itself does not know which Regionserver manages which region, then how does it find the corresponding regionserver? This article is on the basis of research source to uncover

"HBase authoritative guide" reading note 8: Eighth chapter structure

information /hbase/root-region-server contains the machine name of the region server where the-root-region is located, which is often used in area targeting /hbase/rs This znode is the root node for all region servers, and the cluster is used to track server exceptions, each znode is a temporary node, and the node name is the name of the region server /hbas

Hbase and zookeeper Data Structure Query

rmr path 8 delquota [-n|-b] path 9 quit 10 printwatches on|off11 create [-s] [-e] path data acl12 stat path [watch]13 close 14 ls2 path [watch]15 history 16 listquota path17 setAcl path acl18 getAcl path19 sync path20 redo cmdno21 addauth scheme auth22 delete path [version]23 setquota -n|-b val path24 [zk: 192.168.230.128:2181(CONNECTED) 31] ls /25 [

[HBase] data model (logical structure)

[HBase] data model (Logical Structure) HBase stores data in the form of tables. A table consists of rows and columns. The column is divided into several rowfamily columns. The logical view is as follows: The following describes several key concepts: 1) RowKey-the row key is a byte array, any string can be used as the row key. -- the rows in the table are sorted b

Table structure for HBase

Table structure for HBaseHBase stores data in the form of a table. The table is made up of rows and columns. The columns are divided into a number of column family/column families (column family).650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M01/73/54/wKioL1X6d6azVxzgAACdunVHBwg519.jpg "title=" QQ picture 20150917161006.png "alt=" Wkiol1x6d6azvxzgaacdunvhbwg519.jpg "/>As shown, Key1,key2,key3 is the only row key value for three records, Colum

Structure of the HBase meta table

Below is a look at the structure of the Hbase:meta table, Hbase:meta table, save the region address of each table, there are some other information, such as the name of region, Hregioninfo, server information. Each row in the Hbase:meta table corresponds to a single region. For example, we now create a table called "T". The corresponding lines in the Hbase:meta look like the following. row column Family column Qualifie

HBase shell Table Structure Management

HBASE table Structure Management detailed explanation  List List of tables1 hbase (main):001:0> list 1 table 2 cdr 3 noc 4 2 row (s) in 0.1800 seconds 5 Span style= "COLOR: #008080" >6 = = [ " cdr ", " NOC "] result  Create a table  Delete a table  View the

HBase System Architecture and Data Structure

HBase tables generally have the following features: 1 large: A table can have hundreds of millions of rows and 1 million columns. 2 column-oriented: column-oriented (family) Storage and permission control, column (family) independent search. 3 thin HBase tables generally have the following features: 1 large: A table can have hundreds of millions of rows and 1 million columns. 2 column-oriented: column-orien

HBase System Architecture and Data Structure

HBase tables have the following features: 1 large: A table can have hundreds of millions of rows and millions of Columns 2. Column-oriented: storage and permission Control for columns (families), and independent column (family) retrieval. 3 sparse: Columns with null values do not occupy storage space. Therefore, tables can be designed to be sparse. The following figure shows the location of Hbase in Hadoop

Storage Structure of nutch-hbase

Label: style blog HTTP color ar art Div log sp Webpage field descriptionField value changes in various stages of webpage Row COM.2345. Www: HTTP/Col F: fi//FetchintervalCol F: TS//Fetchtime Id primary key, which is generated based on the webpage URL (Format: reversed domain name: Protocol: Port and Path). Therefore, nutch2 can only save the status of the current webpage, however, historical information cannot be saved. (if this is not the case, historical versions will be retained. Each row h

HBase system architecture and data structure

The tables in HBase generally have this feature: 1 big: A table can have billions of rows, millions of columns 2 column-oriented: column (family)-oriented storage and permission control, column (family) independent retrieval. 3 sparse: For a column that is empty (null), it does not occupy storage space, so the table can be designed to be very sparse. The following image is the location of hbase in Hadoop ec

"HBase Basic Tutorial" 1, hbase single-machine mode and pseudo-distributed mode installation

JobTracker10620 TaskTracker18818 HQuorumPeer8902 NameNode4) Enter Shell modeAfter entering shell mode, through the list command to view all the table information of the current database, create a member table with the Creation command, which has member_id,address,info three column families, through the describe command to view the member table structure, Exit the HBase Shell mode with the Exit command.[[em

HBase learning Summary (2): HBase introduction and basic operations, hbase basic operations

successfully installed, enter "list" to view all the tables in HBase. The command execution is as follows: hbase(main):001:0> listTABLE 0 row(s) in 0.2390 seconds=> [] HBase contains 0 tables because it is the first logon. 2. Create a tableH

HBase learning Summary (5): HBase table design, hbase table

HBase learning Summary (5): HBase table design, hbase table I. How to start Pattern Design When talking about schema, consider the following:(1) How many columnfamily should this table have?(2) what data does the column family use?(3) How many columns should each columnfamily have?(4) What is the column name? (Although the column name does not need to be defined

HBase learning Summary (2): HBase introduction and basic operations

leave the HBase ShellVersion 1.0.1, r66a93c09df3b12ff7b86c39bc8475c60e15af82d, Fri Apr 17 22:14:06 PDT 2015hbase(main):001:0> To verify whether HBase is successfully installed, enter "list" to view all the tables in HBase. The command execution is as follows: hbase(main):001:0> listTABLE

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