Use Sqoop to import MySQL Data to Hadoop

Use Sqoop to import MySQL Data to Hadoop The installation and configuration of Hadoop will not be discussed here.Sqoop installation is also very simple. After Sqoop is installed and used, you can test whether it can be connected to mysql (Note: The

Comparison of PostgreSQL database backup and recovery technologies

Comparison of PostgreSQL database backup and recovery technologies There are three completely different methods to back up PostgreSQL data: SQL dump File System-level backup Online backup I. SQL dump The pg_dump application tool is used to

Oracle 11g backup-based rman duplicate

Oracle 11g backup-based rman duplicate Backup-based rman duplicate command to create standby databasePrerequisites: ensure the backup of the original database and archive is completely visible to the standby end,It is assumed that the storage

How to Use RMAN to restore some tablespaces

How to Use RMAN to restore some tablespaces During the routine maintenance and use of the Oracle database, data may be accidentally deleted (drop, delete, truncate). When we use conventional means (flashback query, flashback drop, we can use the

Use mysqlbinlog to extract binary logs

Use mysqlbinlog to extract binary logs The MySQL binlog log records all changes to the current database since the MySQL database is enabled. Binlog logs are binary files. We can extract binary logs to generate readable SQL statements to reconstruct

How to Diagnose Oracle Data Pump-How to add diagnostic information to a Data Pump

How to Diagnose Oracle Data Pump-How to add diagnostic information to a Data Pump There are still many bugs in the 11g Data Pump (expdp/impdp), and we often encounter inexplicable card death, which makes people feel overwhelmed. I recently read an

Solve the problem that the database cannot automatically collect statistics due to Oracle 11g installation.

Solve the problem that the database cannot automatically collect statistics due to Oracle 11g installation. Recently, it was found that some Oracle 11g databases could not automatically collect statistics. Some View query results are as follows: SQL>

Generate tree encoding using Oracle stored procedures

Generate tree encoding using Oracle stored procedures Requirement Field Description Remarks ID Primary Key, 32-bit UUID   TYPE_CODE Encoding Example: 1-01-003 PARENT_ID Parent node ID, 32-bit

Impdp experience ORA-39001, ORA-39000, ORA-39142

Impdp experience ORA-39001, ORA-39000, ORA-39142 Expdp/impdp because the source data version is higher than the target database version, encounter ORA-39001, ORA-39000, ORA-39142, solve only need to expdp export with the target data version, the

Implementation of standalone database in Redis

Implementation of standalone database in Redis Principle The Redis server saves all databases in the db array of the redis. h/redisServer structure in the server status. Each item in the db array is a RedisDb structure, and each redisDb structure

Redis 2.8.18 installation error Solution

Redis 2.8.18 installation error Solution Redis 2.8.18 Installation Error Zmalloc. h: 50: 31: error: jemalloc/jemalloc. h: No such file or directoryZmalloc. h: 55: 2: error: # error "Newer version of jemalloc required"Make [1]: *** [adlist. o] Error 1

Mysql High Performance Memcached (2), mysqlmemcached

Mysql High Performance Memcached (2), mysqlmemcachedThis article describes the problems that need to be paid attention to when deploying Memcached and the distributed algorithm of Memcached.Whether you are a new system or a system that has been

[Useful for volume opening] record the process of solving deadlocks under a high concurrency, and give useful ideas on volume opening

[Useful for volume opening] record the process of solving deadlocks under a high concurrency, and give useful ideas on volume opening It is helpful to open the exam. I haven't written a blog for a long time, and I have been busy working

Mongodb substitutes tokumx and mongodbtokumx

Mongodb substitutes tokumx and mongodbtokumx On the way to NOSQL, not only mongodb is worth noting I recently tested a mongodb from TokuMx. Calculate it as a derivative product! People familiar with Msql may be familiar with this company! First,

Mysql High Performance Memcached (1), mysqlmemcached

Mysql High Performance Memcached (1), mysqlmemcachedThis article describes how to install and use Memcached.What is Memcached?Free & open source, high-performance, distributed memory object caching system, generic in nature, but intended for use in

Character set & #39; utf8mb4 & #39; is not a compiled character set, utf8mb4compiled

Character set 'utf8mb4' is not a compiled character set, utf8mb4compiled A Character set error occurred during a recent MySQL Data migration. The prompt is "character set 'utf8mb4' is not a compiled Character set ". That is, the character set utf8mb4

Impdp terminate ORA-7445 [kpodpals], impdpkpodpals due to fatal errors

Impdp terminate ORA-7445 [kpodpals], impdpkpodpals due to fatal errorsIt was difficult to successfully export all the data to the user the day before yesterday. Today, the user told me that the exported data could not be imported. First, ask the

Qt compiles mysql and creates a table before importing it. qtmysql

Qt compiles mysql and creates a table before importing it. qtmysqlIn view of the fact that many students are always unable to compile myql for Qt and encounter various problems, I would like to write this tutorial to help students who need it.First,

Oracle Integer type/DBNull processing method, oracledbnull

Oracle Integer type/DBNull processing method, oracledbnull 1. I used to think that integer = number (10,126) -- 38 is the maximum precision of number integer is a super large data type, the maximum value can be expressed as power) -1 because one

Huge pages Series 3, hugepages Series

Huge pages Series 3, hugepages Series Use the following shell script to calculate the large page configuration parameters. Make sure that the data instance has been started before using the script, If the database version is 11 GB, check whether

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