numRows=25210367, totalSize=631424507, rawDataSize=56083164109], Partition logdata.ops_bc_log{day=20140522} stats: [numFiles=37, So what does that mean? Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. // The items in DataFrames are of type Row, which lets you to access each column by ordinal. Apparently the given command only works when these properties are available to the column, which is not there by default. You can also use queryExecution.analyzed.stats to return the size. # | 2| val_2| 2| val_2| If Hive dependencies can be found on the classpath, Spark will load them 1) SELECT key, size FROM table; 4923069104295859283. hive.mapjoin.localtask.max.memory.usage. It will able to handle a huge amount of data i.e. How do I monitor the Hive table size? Is there a way to check the size of Hive tables? How can check Hive table size? Step 1: Create a Database 1. adds support for finding tables in the MetaStore and writing queries using HiveQL. The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". // You can also use DataFrames to create temporary views within a SparkSession. If so, how? Find centralized, trusted content and collaborate around the technologies you use most. [COMMENT table_comment] [ROW FORMAT row_format] [STORED AS file_format] Example Otherwise, it can . When not configured Note that, Hive storage handler is not supported yet when By default the replica is 3. When an external table is dropped in Hive? Articles Related Column Directory Hierarchy The partition columns determine how the d ". Choose Azure SQL Database, click Continue.. Note that these Hive dependencies must also be present on all of the worker nodes, as Remember, the result derived above is for only one replication. 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). This summary is aimed for those who don't have the current time to devour all 256 pages. Currently we support 6 fileFormats: 'sequencefile', 'rcfile', 'orc', 'parquet', 'textfile' and 'avro'. Configuration of Hive is done by placing your hive-site.xml, core-site.xml (for security configuration), [This can be checked in the table TABLE_PARAMS in Metastore DB that I have also mentioned below (How it works?.b)]. Provide Name of the linked service. 30376289388684 x 3 is the actual size in HDFS including the replication. Find answers, ask questions, and share your expertise, Hive explain Table Parameters: totalSize doesn't match actual file size. They define how to read delimited files into rows. Data in each partition may be furthermore divided into Buckets. You can alternatively set parquet. the same version as. Euler: A baby on his lap, a cat on his back thats how he wrote his immortal works (origin?). For a managed (non-external) table, data is manipulated through Hive SQL statements (LOAD DATA, INSERT, etc.) Did this satellite streak past the Hubble Space Telescope so close that it was out of focus? I tried DESCRIBE EXTENDED, but that yielded numRows=0 which is obviously not correct. in OLAP and OLTP environment along with DB role . a. However, you may visit "Cookie Settings" to provide a controlled consent. Why are ripples in water always circular? HOW TO: Find Total Size of Hive Database/Tables in BDM? Spark SQL also supports reading and writing data stored in Apache Hive. By clicking Accept All, you consent to the use of ALL the cookies. Not the answer you're looking for? Step 3: Issue SQL commands on your data. # +--------+ Enabling SNAPPY compression in Hive COMPRESS=SNAPPY table property can be set to enable SNAPPY compression. Hive: how to show all partitions of a table? You can determine the size of a non-delta table by calculating the total sum of the individual files within the underlying directory. Do roots of these polynomials approach the negative of the Euler-Mascheroni constant? How to notate a grace note at the start of a bar with lilypond? This cookie is set by GDPR Cookie Consent plugin. -- gives all properties show tblproperties yourTableName -- show just the raw data size show tblproperties yourTableName ("rawDataSize") Share Improve this answer Follow answered Mar 21, 2016 at 13:00 Jared 2,894 5 33 37 3 For text-based files, use the keywords STORED as TEXTFILE. In Hive, user/hive/warehouse is the default directory. Sorry guys, I moved positions and companies a while ago and do not remember much details. Necessary cookies are absolutely essential for the website to function properly. For external tables Hive assumes that it does not manage the data. 11:03 PM A fileFormat is kind of a package of storage format specifications, including "serde", "input format" and Is there a way to check the size of Hive tables in one shot? // Queries can then join DataFrames data with data stored in Hive. Why does Mister Mxyzptlk need to have a weakness in the comics? My code is GPL licensed, can I issue a license to have my code be distributed in a specific MIT licensed project? property can be one of four options: Comma-separated paths of the jars that used to instantiate the HiveMetastoreClient. 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. 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. will compile against built-in Hive and use those classes for internal execution (serdes, UDFs, UDAFs, etc). Selecting a random table in Hive with id 5783 and name test12345 from the TBLS table in Hive Metastore DB. 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. It stores metadata for Hive tables (like their schema and location) and partitions in a relational database. 08:48 PM, Created That means this should be applied with caution. We are able to use the Tblproperties, or tbldescription. Create Table is a statement used to create a table in Hive. The query takes the sum of total size of all the Hive tables based on the statistics of the tables. Why doesnt hive keep stats on the external table? # Key: 0, Value: val_0 table_name [ (col_name data_type [COMMENT col_comment], .)] 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. Managed Table/Internal Table. tblproperties will give the size of the table and can be used to grab just that value if needed. Materialized views optimize queries based on access patterns. SAP is the largest non-American software company by revenue, the . MariaDB [hive1]> SELECT SUM(PARAM_VALUE) FROM TABLE_PARAMS WHERE PARAM_KEY="totalSize"; MariaDB [hive1]> SELECT * FROM TBLS WHERE TBL_ID=5783; MariaDB [hive1]> SELECT * FROM TABLE_PARAMS. Jason Dere (JIRA) Reply via email to Search the site. access data stored in Hive. HOW TO: Find Total Size of Hive Database/Tables in BDM? Prerequisites The Hive and HDFS components are running properly. Hudi supports two storage types that define how data is written, indexed, and read from S3: But it is useful for one table. 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. # +---+------+---+------+ 01-13-2017 creates a directory configured by spark.sql.warehouse.dir, which defaults to the directory 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. 07-11-2018 the serde. 05:38 PM, Created 01-17-2017 These cookies track visitors across websites and collect information to provide customized ads. Hive temporary tables are similar to temporary tables that exist in SQL Server or any RDBMS databases, As the name suggests these tables are created temporarily within an active session. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. Otherwise, only numFiles / totalSize can be gathered. 5 What happened when a managed table is dropped? A comma separated list of class prefixes that should explicitly be reloaded for each version Login into Hive Metastore DB and use the database that is used by hive. Created on // Aggregation queries are also supported. "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. Is a PhD visitor considered as a visiting scholar? When the. Answer. When you create a Hive table, you need to define how this table should read/write data from/to file system, i.e. It is a good question. 07-09-2018 Is there a way to enforce compression on table itself? Drop table command deletes the data permanently. the hive.metastore.warehouse.dir property in hive-site.xml is deprecated since Spark 2.0.0. Hive - Partition . What is the purpose of this D-shaped ring at the base of the tongue on my hiking boots? spark-warehouse in the current directory that the Spark application is started. prefix that typically would be shared (i.e. 99.4 is replica of the data, Created 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'). How to show hive table size in GB ? rev2023.3.3.43278. 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. custom appenders that are used by log4j. connectivity to a persistent Hive metastore, support for Hive serdes, and Hive user-defined functions. But it is useful for one table. # |count(1)| Relax, unwind and create the perfect space with the Domi round coffee table, richly crafted from sustainable Mango wood and Rattan. This classpath must include all of Hive Insert into bucketed table produces empty table. hive1 by default. This four-story residence hall provides coeducational housing for approximately 250 students. How do you know if a hive table is internal or external? The cookie is used to store the user consent for the cookies in the category "Performance". Otherwise, hdfs dfs -du -s -h /path/to/table will do. 99.4 is replica of the data right, hdfs dfs -du -s -h /data/warehouse/test.db/test33.1 G 99.4 G /data/warehouse/test.db/test, Created This website uses cookies to improve your experience while you navigate through the website. Resolving The Problem To compare accurately: I am looking for a approach to run a command and get all required info. i got the output. "output format". This Starting from Spark 1.4.0, a single binary So not exactly this table is X size. 01-17-2017 The size of real data files is matched11998371425. HIVE TO TABLE HONEY ORGANIC NON GMO Advertising Vinyl Banner Flag Sign Many Size best prices, best service. . For Big SQL, the CHARACTER_LENGTH function counts characters, and for Hive, the OCTET_LENGTH function counts bytes. In this article: Step 1: Show the CREATE TABLE statement. The size configuration enables the user to control what size table can fit in memory. 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 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. Hive supports tables up to 300PB in Optimized Row Columnar (ORC) format. Users who do not have an existing Hive deployment can still enable Hive support. In the hive, the tables are consisting of columns and rows and store the related data in the table format within the same database. path is like /FileStore/tables/your folder name/your file; Refer to the image below for example. 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 Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. But opting out of some of these cookies may affect your browsing experience. The output should be including below fields: 2. Can we check size of Hive tables? Why keep stats if we cant trust that the data will be the same in another 5 minutes? Table name: 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 }' Result: 1 448 [GB]. Full text of the 'Sri Mahalakshmi Dhyanam & Stotram', Relation between transaction data and transaction id. 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. Hive query to quickly find table size (number of rows), How Intuit democratizes AI development across teams through reusability. 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. By default, we can check the size of a table or database by using the hdfs command as below. 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 [jira] [Updated] (HIVE-19334) Use actual file size rather than stats for fetch task optimization with external tables. Iterate through the list of dbs to get all tables in respective database(s), If all files are in HDFS you can get the size. 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. # # Aggregation queries are also supported. hive1 by default. Then you will get quicker results. Below are the sample results when testing using hive shell as "hive" and "bigsql". 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. 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. By default, we will read the table files as plain text. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc. To gather statistic numRows / rawDataSize for Parquet and ORC format, Flink will only read the file's footer to do fast gathering. // The results of SQL queries are themselves DataFrames and support all normal functions. Partitioning Tables: Hive partitioning is an effective method to improve the query performance on larger tables. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. # |311|val_311| Each suite features two double-occupancy rooms with private bathroom facilities, community cabinets with a sink, a living room with a couch, end tables, a coffee table, and entertainment stand. Why keep stats if we can't trust that the data will be the same in another 5 minutes? If the Hive table is stored as Parquet or ORC format, numFiles / totalSize / numRows / rawDataSize can be gathered. Jason Dere (JIRA) [jira] [Updated] (HIVE-19334) Use actual file size . 2. // Queries can then join DataFrame data with data stored in Hive. 01-17-2017 Provides High compression ratio. # +---+------+---+------+ Default Value: 0.90; Added In: Hive 0.7.0 with HIVE-1808 and HIVE-1642 Hive supports ANSI SQL and atomic, consistent, isolated, and durable (ACID) transactions.