Is there a way to check the size of Hive tables? 2. What is the lowest common value? Lets assume you have a table which needs more than 25% of the disk space then you wont be able to do anything unless you delete and free up the space on that DB to allow data into the table. 07:16 PM, Created You can set HDFS quota. Hive size Array Function. 02:07 PM. ‎01-16-2017 With the help of database names, users can have same table name in different databases… this return nothing in hive. ‎02-10-2017 Creating an index is common practice with relational databases when you want to speed access to a column or set of columns in your database. describe formatted/extended partition . 02:14 PM, Find answers, ask questions, and share your expertise. Built in user-defined functions (UDFs) to manipulation of strings, dates, and other data-mining tools. Also one cannot set limitation at Hive level to state how much space a database can use. Also one cannot set limitation at Hive level to state how much space a database can use. From Hive-0.14.0 release onwards Hive DATABASE is also called as SCHEMA. You can add a comment to any column, after the type. Can you refer some links to check HDFS user level quota? I want to restrict a database to use only 25% of my HDFS storage not more than that. This article provides the SQL to list table or partition locations from Hive Metastore. There are many ways & techniques to do this. Re: Can we check size of Hive tables? If so - how? ‎01-13-2017 Skip to content. 12:00 PM. 05:16 PM, ANALYZE TABLE db_ip2738.ldl_cohort_with_tests COMPUTE STATISTICS. hive> show tables;OKbee_actionsbee_billsbee_chargesbee_cpc_notifsbee_customersbee_interactionsbee_master_03jun2016_to_17oct2016bee_master_18may2016_to_02jun2016bee_master_18oct2016_to_21dec2016bee_master_20160614_021501bee_master_20160615_010001bee_master_20160616_010001bee_master_20160617_010001bee_master_20160618_010001bee_master_20160619_010001bee_master_20160620_010001bee_master_20160621_010002bee_master_20160622_010001bee_master_20160623_010001bee_master_20160624_065545bee_master_20160625_010001bee_master_20160626_010001bee_master_20160627_010001bee_master_20160628_010001bee_master_20160629_010001bee_master_20160630_010001bee_master_20160701_010001bee_master_20160702_010001bee_master_20160703_010001bee_master_20160704_010001bee_master_20160705_010001bee_master_20160706_010001bee_master_20160707_010001bee_master_20160707_040048bee_master_20160708_010001bee_master_20160709_010001bee_master_20160710_010001bee_master_20160711_010001bee_master_20160712_010001bee_master_20160713_010001bee_master_20160714_010001bee_master_20160715_010002bee_master_20160716_010001bee_master_20160717_010001bee_master_20160718_010001bee_master_20160720_010001bee_master_20160721_010001bee_master_20160723_010002bee_master_20160724_010001bee_master_20160725_010001bee_master_20160726_010001bee_master_20160727_010002bee_master_20160728_010001bee_master_20160729_010001bee_master_20160730_010001bee_master_20160731_010001bee_master_20160801_010001bee_master_20160802_010001bee_master_20160803_010001, Created The size array function is used to return the size of an array type variable. Get filecount, total size, average filesize for Hive tables - hive_info.rb. Here are a few ways of listing all the tables that exist in a database together with the number of rows they contain. Space quota per team for cost management. We can use SCHEMA in place of DATABASE in this command. Here, IF NOT EXISTS is an optional clause, which notifies the user that a database with the same name already exists. If people create table outside of those directories, you should warn them that, that data will be deleted. To get the number of rows in a single table we usually use SELECT COUNT(*) or SELECT COUNT_BIG(*). Created Assume that you set your hive warehouse directory to be 25% of HDFS storage. Is there any way I can restrict a Hive database to use defined space? What does hdfs dfs -du -s -h /path/to/table output? 01:40 PM. ‎02-10-2017 so the Hive system will know about any changes to the underlying data and can update the stats accordingly. I write about Big Data, Data Warehouse technologies, Databases, and other general software related stuffs. ‎01-17-2017 ‎01-09-2018 If your dataset is small, you can use Unix cat command to check the data. If you’re using a GUI tool, such as SSMS to manage your databases, you can easily check the size of your database by clicking your way through the GUI (right-click the database, point to Reports, then Standard Reports, and then click Disk Usage). 01:40 PM, Created Apache Hive supports the following File Formats - 1. 3. Or any property to define a space quota for a database in hive. __Text File__ - Data is … The tables in Hive are similar to tables in Relational Databases. For eg: Team A 25%, Team B 25% and Team C 50%. Without an index, the database system has to read all rows in the table to find the data you have selected. Created on ‎01-17-2017 In Apache Hive, all the data is present in HDFS as files. Since this is an external table (EXTERNAL_TABLE), Hive will not keep any stats on the table since it is assumed that another application is changing the underlying data at will. To access the disk usage table: Login to SSMS. This quota combined should not be more than 25%. Gives you the database size and certain more properties of it: Technique 2: For a specific database: sp_helpdb'adventureworks' 04:19 PM. Why keep stats if we can't trust that the data will be the same in another 5 minutes? 10:16 PM. Go to Hive shell by giving the command sudo hive and enter the command ‘create database’ to create the new database in the Hive.. To list out the databases in Hive warehouse, enter the command ‘show databases’. Add unstructured, data, NoSQL, and Hadoop to the mix, and suddenly you have a massive da… Introduction to Hive Databases. - edited Update: I checked Ranger as well but did not find any setup related to space limitation. hive> describe extended bee_master_20170113_010001> ;OKentity_id stringaccount_id stringbill_cycle stringentity_type stringcol1 stringcol2 stringcol3 stringcol4 stringcol5 stringcol6 stringcol7 stringcol8 stringcol9 stringcol10 stringcol11 stringcol12 string, Detailed Table Information Table(tableName:bee_master_20170113_010001, dbName:default, owner:sagarpa, createTime:1484297904, lastAccessTime:0, retention:0, sd:StorageDescriptor(cols:[FieldSchema(name:entity_id, type:string, comment:null), FieldSchema(name:account_id, type:string, comment:null), FieldSchema(name:bill_cycle, type:string, comment:null), FieldSchema(name:entity_type, type:string, comment:null), FieldSchema(name:col1, type:string, comment:null), FieldSchema(name:col2, type:string, comment:null), FieldSchema(name:col3, type:string, comment:null), FieldSchema(name:col4, type:string, comment:null), FieldSchema(name:col5, type:string, comment:null), FieldSchema(name:col6, type:string, comment:null), FieldSchema(name:col7, type:string, comment:null), FieldSchema(name:col8, type:string, comment:null), FieldSchema(name:col9, type:string, comment:null), FieldSchema(name:col10, type:string, comment:null), FieldSchema(name:col11, type:string, comment:null), FieldSchema(name:col12, type:string, comment:null)], location:hdfs://cmilcb521.amdocs.com:8020/user/insighte/bee_data/bee_run_20170113_010001, inputFormat:org.apache.hadoop.mapred.TextInputFormat, outputFormat:org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat, compressed:false, numBuckets:-1, serdeInfo:SerDeInfo(name:null, serializationLib:org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe, parameters:{field.delim= , serialization.format=Time taken: 0.328 seconds, Fetched: 18 row(s)hive> describe formatted bee_master_20170113_010001> ;OK# col_name data_type comment, entity_id stringaccount_id stringbill_cycle stringentity_type stringcol1 stringcol2 stringcol3 stringcol4 stringcol5 stringcol6 stringcol7 stringcol8 stringcol9 stringcol10 stringcol11 stringcol12 string, # Detailed Table InformationDatabase: defaultOwner: sagarpaCreateTime: Fri Jan 13 02:58:24 CST 2017LastAccessTime: UNKNOWNProtect Mode: NoneRetention: 0Location: hdfs://cmilcb521.amdocs.com:8020/user/insighte/bee_data/bee_run_20170113_010001Table Type: EXTERNAL_TABLETable Parameters:COLUMN_STATS_ACCURATE falseEXTERNAL TRUEnumFiles 0numRows -1rawDataSize -1totalSize 0transient_lastDdlTime 1484297904, # Storage InformationSerDe Library: org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDeInputFormat: org.apache.hadoop.mapred.TextInputFormatOutputFormat: org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormatCompressed: NoNum Buckets: -1Bucket Columns: []Sort Columns: []Storage Desc Params:field.delim \tserialization.format \tTime taken: 0.081 seconds, Fetched: 48 row(s)hive> describe formatted bee_ppv;OK# col_name data_type comment, entity_id stringaccount_id stringbill_cycle stringref_event stringamount doubleppv_category stringppv_order_status stringppv_order_date timestamp, # Detailed Table InformationDatabase: defaultOwner: sagarpaCreateTime: Thu Dec 22 12:56:34 CST 2016LastAccessTime: UNKNOWNProtect Mode: NoneRetention: 0Location: hdfs://cmilcb521.amdocs.com:8020/user/insighte/bee_data/tables/bee_ppvTable Type: EXTERNAL_TABLETable Parameters:COLUMN_STATS_ACCURATE trueEXTERNAL TRUEnumFiles 0numRows 0rawDataSize 0totalSize 0transient_lastDdlTime 1484340138, # Storage InformationSerDe Library: org.apache.hadoop.hive.ql.io.parquet.serde.ParquetHiveSerDeInputFormat: org.apache.hadoop.hive.ql.io.parquet.MapredParquetInputFormatOutputFormat: org.apache.hadoop.hive.ql.io.parquet.MapredParquetOutputFormatCompressed: NoNum Buckets: -1Bucket Columns: []Sort Columns: []Storage Desc Params:field.delim \tserialization.format \tTime taken: 0.072 seconds, Fetched: 40 row(s), Created This command should also help you get the size of HIVE table : I was wondering if stats were needed to have describe extended output the actual file size. Get filecount, total size, average filesize for Hive tables - hive_info.rb. http://hadoop.apache.org/docs/r2.7.2/hadoop-project-dist/hadoop-hdfs/HdfsQuotaAdminGuide.html, Created Using the HDFS utilities to check the directory file sizes will give you the most accurate answer. hive> set hiveconf:hive.cli.print.current.db=true; hive (my_db)> This value will be overwritten if you restart the Hive CLI or you open a new one. USE database_name was added in Hive 0.6 (HIVE-675). ‎01-17-2017 The query takes... 3. Hive stores data in the table as hdfs file, you can simply use hdfs dfs -du command to identify size of folder and that would be your table size. 1. Default Value: 16000000; Added In: Hive 0.5.0; When the average output file size of a job is less than this number, Hive will start an additional map-reduce job to merge the output files into bigger files. the output looke like this: hdfs dfs -du -s -h hdfs://hdpprd/data/prod/users/ip2738/ldl_cohort_with_tests, result:  2.9 G     8.8 G       hdfs://hdpprd/data/prod/users/ip2738/ldl_cohort_with_tests, Created 10:24 PM. If it’s a file, you’ll get the length of the file. hive.merge.smallfiles.avgsize. Metadata storage in a RDBMS, reduces the time to function semantic checks during query execution. Like databases, you can attach a comment to the table itself and you can define one or more table properties.In most cases, the primary benefit of TBLPROPERTIES is to add additional documentation in a key-value format. I do not want one team to utilize the entire cluster space. For a managed (non-external) table, data is manipulated through Hive SQL statements (LOAD DATA, INSERT, etc.) "PARTITIONS" stores the information of Hive table partitions. cat export.csv employee.id,employee.name,employee.age,employee.gender 1,James,30,M 2,Ann,40,F 3,Jeff,41,M 4,Jennifer,20,F hiveuser@namenode:~/hive$. Features of Hive: It provides indexes, including bitmap indexes to accelerate the queries. This is quite straightforward for a single table, but quickly gets tedious if there are a lot of tables, and also can be slow. data warehouse infrastructure tool that processes structured data in Hadoop The easiest way to find the size of all the tables in a database is to use the SQL Server Management Studio’s (SSMS) standard report called Disk Usage by Table. Hive organizes data into databases, tables, partitions and buckets or clusters. ‎12-06-2017 To list the sizes of Hive tables in Hadoop in GBs: 1 1 sudo -u hdfs hadoop fs -du /user/hive/warehouse/ | awk '/^ [0-9]+/ { print int ($1/ (1024**3)) " [GB]\t" $2 }' ... Beer lover and many more.. The simplest method for listing the size of your database tables is to use a handy and official script provided by Amazon Redshift Utilities, table_info.sql. database size and usage To get maximum database size and current usage for a particular database, ForgetCode suggests the simple select query as below. The command will show you the space (in bytes) used by the files that match the file pattern you specify. You restrict that external directory, I can create another directory and point my external table to it. The Hadoop fs -du -s -h command is used to check the size of the HDFS file/directory in human readable format.Since the hadoop file system replicates every file,the actual physical size of the file will be number of replication with multiply of size of the file. (Which is why I want to avoid COUNT(*).) And how do you mix, match, merge, and integrate systems that might have been around for decades with systems that only came to fruition a few months ago? ‎01-13-2017 hive1 by default. 08:48 PM, Created 04:20 PM. Something like YARN Capacity queues. This was before big data and Hadoop. What are the facts, and what subjects relate back to those facts? 1. If you want to check database size of particular database using SSMS Gui Go to Server Explorer -> Expand it -> Right click on Database -> Choose Properties -> In popup window choose General tab ->See Size Source: Check database size in Sql server (Various Ways explained) I tried DESCRIBE EXTENDED, but that yielded numRows=0 which is obviously not correct. i got the output. EXTERNAL_TABLE), Hive will not keep any stats on the table since it is assumed that another application is changing the underlying data at will. Use hdfs dfs -du Command Hadoop supports many useful commands that you can use in day to day activities such as finding size of hdfs folder. For a managed (non-external) table, data is manipulated through Hive SQL statements (LOAD DATA, INSERT, etc.) Find Size Of Tables Using SSMS Standard Report. Query to get the Table size: SELECT DATABASENAME, TABLENAME, SUM (CURRENTPERM)/1024**2 AS CURRENT_MB, SUM (CURRENTPERM)/1024**3 AS CURRENT_GB FROM DBC.ALLSPACE WHERE DATABASENAME = 'DATABASE_NAME' AND TABLENAME = 'TABLE_NAME' GROUP BY 1,2 ORDER BY 1,2 1 2 So what does that mean? So, here is how you can almost achieve it but it's a combination of technology as well as policy you will implement. Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. hive.merge.size.per.task. Think about this. Thanks very much for all your help, Created Query to find the size of the database and database file is a simple and most common requirement. Can we check size of Hive tables? I recall something like that. Thank you @mbalakrishnan. [ANNOUNCE] New Cloudera ODBC 2.6.12 Driver for Apache Impala Released, [ANNOUNCE] New Cloudera JDBC 2.6.20 Driver for Apache Impala Released, Transition to private repositories for CDH, HDP and HDF, [ANNOUNCE] New Applied ML Research from Cloudera Fast Forward: Few-Shot Text Classification, [ANNOUNCE] New JDBC 2.6.13 Driver for Apache Hive Released. Created 05:16 PM, Find answers, ask questions, and share your expertise. Here is the link which talks about the HDFS quota. To revert to the default database, use the keyword " default " instead of a database name. Steps: 1. Lets assume you have a table which needs more than 25% of the disk space then you wont be able to do anything unless you delete and free up the space on that DB to allow data into the table. ‎02-10-2017 01:03 PM. so the Hive system will know about any changes to the underlying data and can update the stats accordingly. ‎02-09-2017 Query the metastore to check the metastore for database eduonixcourses exists. Establish an organizational policy that Hive tables must be created only on above directories.
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