hive table size
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maio 13, 2021 Switch to the HBase schema and issue the SHOW TABLES command to see the HBase tables that exist within the schema. 10:14 PM, Created It will able to handle a huge amount of data i.e. How can check Hive table size? For external tables Hive assumes that it does not manage the data. Note that independent of the version of Hive that is being used to talk to the metastore, internally Spark SQL Table name: What is the difference between partitioning and bucketing a table in Hive ? // Aggregation queries are also supported. org.apache.spark.api.java.function.MapFunction. This command shows meta data about the hive table which includes list of columns,data types and location of the table.There are three ways to describe a table in Hive. Can we check size of Hive tables? There are some hidden intermediate file so it doesn't match du number, Created Linear regulator thermal information missing in datasheet, Short story taking place on a toroidal planet or moon involving flying. Here are the types of tables in Apache Hive: Managed Tables. This classpath must include all of Hive To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. If you want the DROP TABLE command to also remove the actual data in the external table, as DROP TABLE does on a managed table, you need to configure the table properties accordingly. Hive is a very important component or service in the Hadoop stack. If so, how? tblproperties will give the size of the table and can be used to grab just that value if needed. 8 How do I tell hive about file formats in HDFS? How to notate a grace note at the start of a bar with lilypond? The data loaded in the hive database is stored at the HDFS path /user/hive/warehouse. A comma separated list of class prefixes that should explicitly be reloaded for each version I have many tables in Hive and suspect size of these tables are causing space issues on cluster. [This can be checked in the table TABLE_PARAMS in Metastore DB that I have also mentioned below (How it works?.b)]. As a part of maintenance, you should identify the size of growing tables periodically. Jason Dere (JIRA) Reply via email to Search the site. This article shows how to import a Hive table from cloud storage into Databricks using an external table. What is the purpose of this D-shaped ring at the base of the tongue on my hiking boots? For example:, if partition by date (mm-dd-yyyy). 11:46 AM, Du return 2 number. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. My code is GPL licensed, can I issue a license to have my code be distributed in a specific MIT licensed project? However I ran the hdfs command and got two sizes back. By default hive1 database Hive Metastore DB, execute the following query to get the total size of all the tables in Hive in bytes for one replica, multiply it by replication factor. Hive supports tables up to 300PB in Optimized Row Columnar (ORC) format. rev2023.3.3.43278. Yeah, you are correct. click browse to upload and upload files from local. Note that Do roots of these polynomials approach the negative of the Euler-Mascheroni constant? Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors. the "serde". Otherwise, hdfs dfs -du -s -h /path/to/table will do. 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 What is the point of Thrower's Bandolier? The param COLUMN_STATS_ACCURATE with the value true says the table's statistics property is set to true. 2) select * from table; IDcf07c309-c685-4bf4-9705-8bca69b00b3c HIVE_BAD_DATA: Field size's type LONG in ORC is incompatible with type varchar defined in table schema The totalSize returned in Hive is only the actual size of the table itself, which is only 1 copy, so 11998371425 * 3 = 35995114275 = 33GB. Below are the steps to launch a hive on your local system. # # You can also use DataFrames to create temporary views within a SparkSession. 11:03 PM 03:54 AM. So what does that mean? rev2023.3.3.43278. [COMMENT table_comment] [ROW FORMAT row_format] [STORED AS file_format] Example I am looking for a approach to run a command and get all required info. # The items in DataFrames are of type Row, which allows you to access each column by ordinal. There is an alternative way(can't say alternate but better latency than above case) : and run the same command ( select count(*) from tbl ) which gives better latency than prior. 01:40 PM, Created - the incident has nothing to do with me; can I use this this way. they will need access to the Hive serialization and deserialization libraries (SerDes) in order to repopulate so size is different but still not match11998371425. hdfs dfs -du -s -h /data/warehouse/test.db/test/22.5 G 67.4 G /data/warehouse/test.db/test. The four most widely used Compression formats in Hadoop are as follows: The principle being that file sizes will be larger when compared with gzip or bzip2. prefix that typically would be shared (i.e. numRows=26095186, totalSize=654249957, rawDataSize=58080809507], Partition logdata.ops_bc_log{day=20140521} stats: [numFiles=30, Hive explain Table Parameters: totalSize doesn't m Open Sourcing Clouderas ML Runtimes - why it matters to customers? Mutually exclusive execution using std::atomic? # | 2| val_2| 2| val_2| Each room features air conditioning, an extra-long, twin-size bed, a desk, a chair, a wardrobe with drawers . Staging Ground Beta 1 Recap, and Reviewers needed for Beta 2, Hive "ANALYZE TABLE" how to execute from java. Use hdfs dfs -du Command creating table, you can create a table using storage handler at Hive side, and use Spark SQL to read it. You can use the hdfs dfs -du /path/to/table command or hdfs dfs -count -q -v -h /path/to/table to get the size of an HDFS path (or table). this return nothing in hive. How do I monitor the Hive table size? Yes the output is bytes. You can alternatively set parquet. the hive.metastore.warehouse.dir property in hive-site.xml is deprecated since Spark 2.0.0. 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. # Queries can then join DataFrame data with data stored in Hive. Using hive.auto.convert.join.noconditionaltask, you can combine three or more map-side joins into a (This rule is defined by hive.auto.convert.join.noconditionaltask.size.) These options can only be used with "textfile" fileFormat. We are able to use the Tblproperties, or tbldescription. // warehouseLocation points to the default location for managed databases and tables, "CREATE TABLE IF NOT EXISTS src (key INT, value STRING) USING hive", "LOAD DATA LOCAL INPATH 'examples/src/main/resources/kv1.txt' INTO TABLE src". If the location is not specified, by default all metadata gets stored in this path. Got it!!. How to show hive table size in GB ? # +---+-------+ 1. Step 2: Create a DataFrame Does a summoned creature play immediately after being summoned by a ready action? # +--------+ Clouderas new Model Registry is available in Tech Preview to connect development and operations workflows, [ANNOUNCE] CDP Private Cloud Base 7.1.7 Service Pack 2 Released, [ANNOUNCE] CDP Private Cloud Data Services 1.5.0 Released. The HDFS refined monitoring function is normal. Step 1: Show the CREATE TABLE statement Step 2: Issue a CREATE EXTERNAL TABLE statement Step 3: Issue SQL commands on your data This article shows how to import a Hive table from cloud storage into Azure Databricks using an external table. For a managed (non-external) table, data is manipulated through Hive SQL statements (LOAD DATA, INSERT, etc.) 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. How do I tell hive about file formats in HDFS? You also need to define how this table should deserialize the data Once done, you can execute the below query to get the total size of all the tables in Hive in. C $35.26. 07-09-2018 2. Data in each partition may be furthermore divided into Buckets. Otherwise, only numFiles / totalSize can be gathered. the "input format" and "output format". Open Synapse Studio, go to Manage > Linked services at left, click New to create a new linked service.. Difference between Hive internal tables and external tables? To use S3 Select in your Hive table, create the table by specifying com.amazonaws.emr.s3select.hive.S3SelectableTextInputFormat as the INPUTFORMAT class name, and specify a value for the s3select.format property using the TBLPROPERTIES clause. To learn more, see our tips on writing great answers. Spark SQL also supports reading and writing data stored in Apache Hive. If Hive dependencies can be found on the classpath, Spark will load them What sort of strategies would a medieval military use against a fantasy giant? By default, S3 Select is disabled when you run queries. Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. Create Table is a statement used to create a table in Hive. 05:16 PM, Find answers, ask questions, and share your expertise. Step 1: Show the CREATE TABLE statement Linear Algebra - Linear transformation question. # Key: 0, Value: val_0 The provided jars should be Do roots of these polynomials approach the negative of the Euler-Mascheroni constant? Hive stores query logs on a per Hive session basis in /tmp/<user.name>/ by default. and its dependencies, including the correct version of Hadoop. Analyzing a table (also known as computing statistics) is a built-in Hive operation that you can execute to collect metadata on your table. Full text of the 'Sri Mahalakshmi Dhyanam & Stotram', Relation between transaction data and transaction id. The major difference between Partitioning vs Bucketing lives in the way how they split the data. 07-05-2018 01-17-2017 This cookie is set by GDPR Cookie Consent plugin. Switch to the Hive schema and issue the SHOW TABLES command to see the Hive tables that exist. Insert into bucketed table produces empty table. How to limit parquet file dimension for a parquet table in hive? 1. find out the path of the hive tables: for example, find the path for table r_scan1, 01-13-2017 # Key: 0, Value: val_0 SELECT SUM(PARAM_VALUE) FROM TABLE_PARAMS WHERE PARAM_KEY=totalSize; Get the table ID of the Hive table forms the TBLS table and run the following query: SELECT TBL_ID FROM TBLS WHERE TBL_NAME=test; SELECT * FROM TABLE_PARAMS WHERE TBL_ID=5109; GZIP. hive1 by default. This cookie is set by GDPR Cookie Consent plugin. Otherwise, it can . Types of Tables in Apache Hive. Record the name of the linked service, this info will be used to configure Spark shortly. 01-09-2018 Each Hudi dataset is registered in your cluster's configured metastore (including the AWS Glue Data Catalog ), and appears as a table that can be queried using Spark, Hive, and Presto. 1. 07-11-2018 The size configuration enables the user to control what size table can fit in memory. compression=SNAPPY in the Custom hive-site settings section in Ambari for either IOP or HDP which will ensure that Hive always compresses any Parquet file it produces. The tables are broadly classified into two parts i.e. Hive: how to show all partitions of a table? Created on You can determine the size of a non-delta table by calculating the total sum of the individual files within the underlying directory. 09-16-2022 This will output stats like totalNumberFiles, totalFileSize, maxFileSize, minFileSize, lastAccessTime, and lastUpdateTime. numRows=26295075, totalSize=657113440, rawDataSize=58496087068], solution, though not quick The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". The size of real data files is matched11998371425. Step 1: Start all your Hadoop Daemon start-dfs.sh # this will start namenode, datanode and secondary namenode start-yarn.sh # this will start node manager and resource manager jps # To check running daemons Step 2: Launch hive from terminal hive Creating Table in Hive Hive Partition is a way to organize large tables into smaller logical tables . SAP is the largest non-American software company by revenue, the . Once done, you can execute the below query to get the total size of all the tables in Hive in bytes. Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. 07-06-2018 Hands on experience on SQL SERVER 2016, 2014, SSIS, SSRS, SSAS (Data Warehouse, DataMart, Dimensional Modelling, Cube Designing and deployment), Power BI, MSBI and SYBASE 12.5. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. For a managed (non-external) table, data is manipulated through Hive SQL statements (LOAD DATA, INSERT, etc.) Step 1: Create a Database 1. If a managed table or partition is dropped, the data and metadata associated with that table or partition are deleted. When you run DROP TABLE on an external table, by default Hive drops only the metadata (schema). By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Is there a Hive query to quickly find table size (i.e. Sorry guys, I moved positions and companies a while ago and do not remember much details. Login into Hive Metastore DB and use the database that is used by hive. The LENGTH function in Big SQL counts bytes, whereas LENGTH function in Hive counts characters. However, you may visit "Cookie Settings" to provide a controlled consent. 07-11-2018 Checking the different parameters of the table in Hive Metastore table TABLE_PARAMS for the same Hive table with id 5783. # +---+------+---+------+ Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. The total size of the Hive Database can be fetched using Hive Metastore DB in the TABLE_PARAMS table. Why are ripples in water always circular? path is like /FileStore/tables/your folder name/your file; Refer to the image below for example. Compressed file size should not be larger than a few hundred megabytes. to be shared are those that interact with classes that are already shared. Prerequisites The Hive and HDFS components are running properly. Whats the grammar of "For those whose stories they are"? - edited 01-17-2017 HIVE-19334.4.patch > Use actual file size rather than stats for fetch task optimization with > external tables . Recovering from a blunder I made while emailing a professor, How to handle a hobby that makes income in US. Created // Queries can then join DataFrames data with data stored in Hive. "SELECT * FROM records r JOIN src s ON r.key = s.key", // Create a Hive managed Parquet table, with HQL syntax instead of the Spark SQL native syntax, "CREATE TABLE hive_records(key int, value string) STORED AS PARQUET", // Save DataFrame to the Hive managed table, // After insertion, the Hive managed table has data now, "CREATE EXTERNAL TABLE hive_bigints(id bigint) STORED AS PARQUET LOCATION '$dataDir'", // The Hive external table should already have data. "SELECT key, value FROM src WHERE key < 10 ORDER BY key". hdfs dfs -du command returns the TOTAL size in HDFS, including all replicas. hdfs dfs -df -s -h