Default Value: 256000000; Added In: Hive 0.4.0; Size of merged files at the end of the job. Login into Hive Metastore DB and use the database that is used by hive. Assume that you set your hive warehouse directory to be 25% of HDFS storage. Steps: 1. I am exploring other option where I can restrict hdfs folder which will be the location of db. So, here is how you can almost achieve it but it's a combination of technology as well as policy you will implement. 12:25 PM What does hdfs dfs -du -s -h /path/to/table output? The easiest way to find the size of all the tables in a database is to use the SQL Server Management Studioâs (SSMS) standard report called Disk Usage by Table. Hive organizes data into databases, tables, partitions and buckets or clusters. Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. What are the facts, and what subjects relate back to those facts? 02:14 PM, Find answers, ask questions, and share your expertise. Created 01:40 PM, Created 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. This quota combined should not be more than 25%. If people create table outside of those directories, you should warn them that, that data will be deleted. USE database_name was added in Hive 0.6 (HIVE-675). To get the number of rows in a single table we usually use SELECT COUNT(*) or SELECT COUNT_BIG(*). If so - how? For eg: Team A 25%, Team B 25% and Team C 50%. 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. If youâre 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). Establish an organizational policy that Hive tables must be created only on above directories. Velocity can be taken as the speed at which data is acquired, processed and used. I recall something like that. Query to find the size of the database and database file is a simple and most common requirement. To find out the exact size of the database, we have to find out the data length and index length MySQL Query: SELECT table_schema "Data Base", SUM( data_length + index_length) / 1024 / 1024 "Size in MB" FROM information_schema.TABLES GROUP BY table_schema ; This was before big data and Hadoop. It really doesn't work at Hive level. 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? 3. 05:16 PM, Find answers, ask questions, and share your expertise. 01-17-2017 Created If itâs a file, youâll get the length of the file. I'll just create an external table. 02-10-2017 All the commands discussed below will do the same work for SCHEMA and DATABASE keywords in the syntax. 02-09-2017 01-17-2017 The syntax of the du command is as follows: hdfs dfs -du -h /"path to specific hdfs directory" 12-06-2017 04:20 PM. The query takes... 3. Following is the syntax of size function. 05:16 PM, ANALYZE TABLE db_ip2738.ldl_cohort_with_tests COMPUTE STATISTICS. this return nothing in hive. Features of Hive: It provides indexes, including bitmap indexes to accelerate the queries. Created 2. 10:59 PM, Created 01:40 PM. "PARTITIONS" stores the information of Hive table partitions. 01-09-2018 I have many tables in Hive and suspect size of these tables are causing space issues on HDFS FS. I do not want one team to utilize the entire cluster space. @mbalakrishnan is right. 1. 01-13-2017 Metadata storage in a RDBMS, reduces the time to function semantic checks during query execution. This is quite straightforward for a single table, but quickly gets tedious if there are a lot of tables, and also can be slow. Think about this. 05:38 PM, Created so the Hive system will know about any changes to the underlying data and can update the stats accordingly. Something like YARN Capacity queues. Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. Created Is there a Hive query to quickly find table size (i.e. Here is the link which talks about the HDFS quota. - edited Created on 08:48 PM, Created 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 You can add a comment to any column, after the type. With the help of database names, users can have same table name in different databases⦠So what does that mean? so the Hive system will know about any changes to the underlying data and can update the stats accordingly. Without an index, the database system has to read all rows in the table to find the data you have selected. Also one cannot set limitation at Hive level to state how much space a database can use. There are different appliances, methodologies, and theories. [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. It needs to be set at HDFS user level quota. Is there any way I can restrict a Hive database to use defined space? Add unstructured, data, NoSQL, and Hadoop to the mix, and suddenly you have a massive da⦠... Beer lover and many more.. 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 write about Big Data, Data Warehouse technologies, Databases, and other general software related stuffs. Or any property to define a space quota for a database in hive. Apache Hive supports the following File Formats - 1. Why keep stats if we can't trust that the data will be the same in another 5 minutes? number of rows) without launching a time-consuming MapReduce job? You set quota at directory level. Here are âjustâ some of them: Technique 1: sp_helpdb. 02-09-2017 01-13-2017 Re: Can we check size of Hive tables? Hi all, I am looking to find the size of the database by counting all the used pages. 02-09-2017 Here, IF NOT EXISTS is an optional clause, which notifies the user that a database with the same name already exists. If so - how? Databases contain tables, which are in turn made up of partitions. Here are a few ways of listing all the tables that exist in a database together with the number of rows they contain. 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 Can we check size of Hive tables? Also one cannot set limitation at Hive level to state how much space a database can use. What is the lowest common value? 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. 04:19 PM. 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. 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 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 02-10-2017 02-09-2017 Hive Database Commands Note. Remember, the result derived above is for only one replication. Assign HDFS quota to directories where users can create table (data warehouse directory as well as external directories). There are many ways & techniques to do this. 01-17-2017 01-16-2017 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. The eduonixcourses database has been created in the metastore repository so our Hive installation is working properly. Thank you @mbalakrishnan. 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 }' DATABASE, HIVE, SCRIPTING, Shell Script beeline command in shell scripting using variables, shell script to check whether data is present in the hive table or not, shell script to check whether hive table is present or not Post navigation Users and administrators can act accordingly by watching the spool usage to improve the performance. 12:00 PM. Created For a managed (non-external) table, data is manipulated through Hive SQL statements (LOAD DATA, INSERT, etc.) 01:03 PM. Is there a way to check the size of Hive tables? This article provides the SQL to list table or partition locations from Hive Metastore. I tried DESCRIBE EXTENDED, but that yielded numRows=0 which is obviously not correct. 01-17-2017 09:36 PM. I dont understand the usecase of limiting a database to use a X percent. Using the HDFS utilities to check the directory file sizes will give you the most accurate answer. 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. So, Both SCHEMA and DATABASE are same in Hive. http://hadoop.apache.org/docs/r2.7.2/hadoop-project-dist/hadoop-hdfs/HdfsQuotaAdminGuide.html, Created You can set HDFS quota. hive.merge.size.per.task. 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. Skip to content. The database creates in a default location of the Hive warehouse. Export Hive Table into CSV Using Hive CLI Command. For a managed (non-external) table, data is manipulated through Hive SQL statements (LOAD DATA, INSERT, etc.) Space quota per team for cost management. 3. Created Volume obviously, refers to the size of the storage required. All gists Back to GitHub Sign in Sign up Sign in Sign up {{ message }} Instantly share code, notes, and snippets. 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. Built in user-defined functions (UDFs) to manipulation of strings, dates, and other data-mining tools. 10:24 PM. (Which is why I want to avoid COUNT(*).) describe formatted/extended
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