I recall something like that. Sorry guys, I moved positions and companies a while ago and do not remember much details. // The items in DataFrames are of type Row, which allows you to access each column by ordinal. The HDFS refined monitoring function is normal. However, since Hive has a large number of dependencies, these dependencies are not included in the If the PURGE option is not specified, the data is moved to a trash folder for a defined duration. If so, how? [This can be checked in the table TABLE_PARAMS in Metastore DB that I have also mentioned below (How it works?.b)]. Partitioning Tables: Hive partitioning is an effective method to improve the query performance on larger tables. What sort of strategies would a medieval military use against a fantasy giant? Whats the grammar of "For those whose stories they are"? The data will be store on the distributed manager. Version of the Hive metastore. HOW TO: Find Total Size of Hive Database/Tables in BDM? What is Hive? to be shared are those that interact with classes that are already shared. Next, verify the database is created by running the show command: show databases; 3. Thanks for contributing an answer to Stack Overflow! Partition logdata.ops_bc_log{day=20140523} stats: [numFiles=37, 09:39 AM. # |key| value| How do you know if a hive table is internal or external? I was wondering if there is a way to enforce compression on table itself so that even if the above two properties are not set the data is always compressed? Answer. # +---+-------+ Currently we support 6 fileFormats: 'sequencefile', 'rcfile', 'orc', 'parquet', 'textfile' and 'avro'. 12:25 PM However I ran the hdfs command and got two sizes back. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. 10:14 PM, Created - edited Connect and share knowledge within a single location that is structured and easy to search. Hive is an ETL and Data warehousing tool developed on top of the Hadoop Distributed File System. Can we check size of Hive tables? SAP SE (/ s. e p i /; German pronunciation: [sape] ()) is a German multinational software company based in Walldorf, Baden-Wrttemberg.It develops enterprise software to manage business operations and customer relations. 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.) This is a Summary of Kate Hudson's NY Times Bestseller 'Pretty Happy'. be shared is JDBC drivers that are needed to talk to the metastore. Otherwise, only numFiles / totalSize can be gathered. Asking for help, clarification, or responding to other answers. This website uses cookies to improve your experience while you navigate through the website. (Apologies for the newb question. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc. 01-13-2017 The LENGTH function in Big SQL counts bytes, whereas LENGTH function in Hive counts characters. Data in each partition may be furthermore divided into Buckets. But it is useful for one table. # +---+------+---+------+ 11:03 PM That means this should be applied with caution. Why are ripples in water always circular? Kate believes the key to living well, and healthy, is to plug into what your body needs, understanding that one size does not fit all, all the time, and being truly honest with yourself about your goals and desires. so the Hive system will know about any changes to the underlying data and can update the stats accordingly. The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". 01-17-2017 Functional cookies help to perform certain functionalities like sharing the content of the website on social media platforms, collect feedbacks, and other third-party features. path is like /FileStore/tables/your folder name/your file; Refer to the image below for example. # | 4| val_4| 4| val_4| In the hive, the tables are consisting of columns and rows and store the related data in the table format within the same database. Apparently the given command only works when these properties are available to the column, which is not there by default. As a part of maintenance, you should identify the size of growing tables periodically. How do you write a good story in Smash Bros screening? Is there a way to check the size of Hive tables in one shot? CREATE TABLE src(id int) USING hive OPTIONS(fileFormat 'parquet'). 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. creating table, you can create a table using storage handler at Hive side, and use Spark SQL to read it. 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. Why does Mister Mxyzptlk need to have a weakness in the comics? If you create a Hive table over an existing data set in HDFS, you need to tell Hive about the format of the files as they are on the filesystem (schema on read). In this article: Step 1: Show the CREATE TABLE statement. build of Spark SQL can be used to query different versions of Hive metastores, using the configuration described below. # +--------+ totalSize: 07-10-2018 Whats the grammar of "For those whose stories they are"? 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 // 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". To learn more, see our tips on writing great answers. The below steps when when performed in the Hive Metastore DB would help you in getting the total size occupied by all the tables in Hive. 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. 01:40 PM, Created adds support for finding tables in the MetaStore and writing queries using HiveQL. in Hive Each Table can have one or more partition. if the table is partitioned, we can count the number of partitions and count(number of rows) in each partition. Note that Step 2: Create a DataFrame How do I tell hive about file formats in HDFS? numRows: What is the difference between partitioning and bucketing a table in Hive ? Table name: For external tables Hive assumes that it does not manage the data. 1. // Order may vary, as spark processes the partitions in parallel. 06:25 AM, When i run du command it give me below size of table, 33.1 GB hdfs dfs -du -s -h /data/warehouse/test.db/test, ANALYZE TABLECOMPUTE STATISTICS FOR COLUMNS, Created Insert into bucketed table produces empty table. Created on Although Hudi provides sane defaults, from time-time these configs may need to be tweaked to optimize for specific workloads. 4 What are the compression techniques in Hive? Not the answer you're looking for? // Turn on flag for Hive Dynamic Partitioning, // Create a Hive partitioned table using DataFrame API. I tried DESCRIBE EXTENDED, but that yielded numRows=0 which is obviously not correct. 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). Do roots of these polynomials approach the negative of the Euler-Mascheroni constant? The nature of simulating nature: A Q&A with IBM Quantum researcher Dr. Jamie We've added a "Necessary cookies only" option to the cookie consent popup. Click Table in the drop-down menu, it will open a create new table UI; In UI, specify the folder name in which you want to save your files. But when there are many databases or tables (especially external tables) with data present in multiple different directories in HDFS, the below might help in determining the size. 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 We do not have to provide the location manually while creating the table. When working with Hive one must instantiate SparkSession with Hive support. (Which is why I want to avoid COUNT(*).). However, you may visit "Cookie Settings" to provide a controlled consent. # |key| value|key| value| How do I monitor the Hive table size? this return nothing in hive. Euler: A baby on his lap, a cat on his back thats how he wrote his immortal works (origin?). This can vastly improve query times on the table because it collects the row count, file count, and file size (bytes) that make up the data in the table and gives that to the query planner before execution. Thanks very much for all your help, Created 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. How to show hive table size in GB ? numRows=26295075, totalSize=657113440, rawDataSize=58496087068], solution, though not quick numRows=26095186, totalSize=654249957, rawDataSize=58080809507], Partition logdata.ops_bc_log{day=20140521} stats: [numFiles=30, # # You can also use DataFrames to create temporary views within a SparkSession. We are able to use the Tblproperties, or tbldescription. hive.auto.convert.join, Hive generates three or more map-side joins with an assumption that all tables are of smaller size. When working with Hive, one must instantiate SparkSession with Hive support, including Note that, Hive storage handler is not supported yet when Steps to Read Hive Table into PySpark DataFrame Step 1 - Import PySpark Step 2 - Create SparkSession with Hive enabled Step 3 - Read Hive table into Spark DataFrame using spark.sql () Step 4 - Read using spark.read.table () Step 5 - Connect to remove Hive. The following options can be used to specify the storage "After the incident", I started to be more careful not to trip over things. % scala spark.read.table ("< non-delta-table-name >") .queryExecution.analyzed.stats Was this article helpful? What is Hive Temporary Tables? If so, how? 01-13-2017 // Partitioned column `key` will be moved to the end of the schema. Managed or external tables can be identified using the DESCRIBE FORMATTED table_name command, which will display either MANAGED_TABLE or EXTERNAL_TABLE depending on table type. 5 What happened when a managed table is dropped? This classpath must include all of Hive How do I align things in the following tabular environment? # |count(1)| These cookies will be stored in your browser only with your consent. Use parquet format to store data of your external/internal table. Available in extra large sizes, a modern twist on our popular Hive prefix that typically would be shared (i.e. // Queries can then join DataFrame data with data stored in Hive. Why doesnt hive keep stats on the external table? numRows=21363807, totalSize=564014889, rawDataSize=47556570705], Partition logdata.ops_bc_log{day=20140524} stats: [numFiles=35, they will need access to the Hive serialization and deserialization libraries (SerDes) in order to What does hdfs dfs -du -s -h /path/to/table output? in terms of the TB's, etc. Hive stores query logs on a per Hive session basis in /tmp/<user.name>/ by default. # The results of SQL queries are themselves DataFrames and support all normal functions. On a single core of a Core i7 processor in 64-bit mode, it compresses at about 250 MB/sec or more and decompresses at about 500 MB/sec or more. We also use third-party cookies that help us analyze and understand how you use this website. Both the specific command the the timestamp are captured. Reusable Hive Baitable Beetle Trap Without Poison Chemicals Beekeeping Tool SH. This cookie is set by GDPR Cookie Consent plugin. Uses high CPU resources to compress and decompress data. 11:46 AM, Du return 2 number. This configuration is useful only when, A classpath in the standard format for the JVM. We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. 10:59 PM, Created Making statements based on opinion; back them up with references or personal experience. shared between Spark SQL and a specific version of Hive. Create Table is a statement used to create a table in Hive. spark-warehouse in the current directory that the Spark application is started. Hive supports ANSI SQL and atomic, consistent, isolated, and durable (ACID) transactions. 09:33 AM, CREATE TABLE `test.test`()ROW FORMAT SERDE'org.apache.hadoop.hive.ql.io.parquet.serde.ParquetHiveSerDe'STORED AS INPUTFORMAT'org.apache.hadoop.hive.ql.io.parquet.MapredParquetInputFormat'OUTPUTFORMAT'org.apache.hadoop.hive.ql.io.parquet.MapredParquetOutputFormat'LOCATION'hdfs://usasprd1/data/warehouse/test.db/test'TBLPROPERTIES ('COLUMN_STATS_ACCURATE'='true','last_modified_by'='hive','last_modified_time'='1530552484','numFiles'='54','numRows'='134841748','rawDataSize'='4449777684','totalSize'='11998371425','transient_lastDdlTime'='1531324826'). 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 2. . to rows, or serialize rows to data, i.e. 1) SELECT key, size FROM table; 4923069104295859283. Based on a recent TPC-DS benchmark by the MR3 team, Hive LLAP 3.1.0 is the fastest SQL-on-Hadoop system available in HDP 3.0.1. As user bigsql: connectivity to a persistent Hive metastore, support for Hive serdes, and Hive user-defined functions. The totalSize returned in Hive is only the actual size of the table itself, which is only 1 copy, so 11998371425 * 3 = 35995114275 = 33GB. The data loaded in the hive database is stored at the HDFS path /user/hive/warehouse. rev2023.3.3.43278. When not configured org.apache.spark.*). Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. and its dependencies, including the correct version of Hadoop. 01-17-2017 and hdfs-site.xml (for HDFS configuration) file in conf/. The default for hive.auto.convert.join.noconditionaltask is false which means auto conversion is disabled.. To get the size of your test table (replace database_name and table_name by real values) just use something like (check the value of hive.metastore.warehouse.dir for /apps/hive/warehouse): [ hdfs @ server01 ~] $ hdfs dfs -du -s -h / apps / hive / warehouse / database_name / table_name Tables created by oozie hive action cannot be found from hive client but can find them in HDFS. Each room features air conditioning, an extra-long, twin-size bed, a desk, a chair, a wardrobe with drawers . 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. 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. This will output stats like totalNumberFiles, totalFileSize, maxFileSize, minFileSize, lastAccessTime, and lastUpdateTime. # +---+-------+ The following options can be used to configure the version of Hive that is used to retrieve metadata: A comma-separated list of class prefixes that should be loaded using the classloader that is 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. The cookies is used to store the user consent for the cookies in the category "Necessary". How to notate a grace note at the start of a bar with lilypond? I tried Googling and searching the apache.org documentation without success.). If you preorder a special airline meal (e.g. You also have the option to opt-out of these cookies.
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