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  Role Management of Dameng Database

  The role management of Dameng database is seldom used in daily use scenarios. Generally speaking, the roles included in the main database can be configured according to the various needs of some users or some tables. This article also follows the previous idea to practice the basic functions such as role creation, modification, deletion and so on.

  2022-06-01 22:03:45 Views: 298
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  Learning Redis persistence

  Redis supports two persistence mechanisms: RDB and AOF. Persistence can effectively avoid the problem of data loss caused by process exit. Data recovery can be achieved by using previously persisted files when you restart next time. Understanding the persistence mechanism is very important for Redis operation and maintenance. First of all, introduce R

  2022-06-01 22:03:37 Views: 274
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  Practical Guide to Oracle GoldenGate Quick installation and configuration

  As the core strategic product developed by Oracle, GoldenGate plays a more and more important role in high availability, disaster recovery, data extraction and conversion. There are so many things goldengate can do, such as high availability, disaster recovery, Real-Tim

  2022-06-01 22:03:37 Views: 280
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  Mysql command line auto-completion-- mycli installation

  1. Install piping [root @ mysql] # yum-y install python-pip python-devel [root@mysql ~] # curl https://bo based on python

  2022-06-01 22:03:34 Views: 258
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  PostgreSQL12 experience

  1. Create the database D:\ PostgreSQL\ bin > initdb.exe-D D:\ PostgreSQL\ data-E UTF-8-U postgres-W2. Start the database pg_ctl-D "D

  2022-06-01 22:03:33 Views: 225
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  Flume-1.6.0 Learning Notes (6) kafka source

  Lu Chunli's work notes are not as good as bad notes. Flume1.6.0 has added full support for kafka: Flume Sink and Source for Apache KafkaA new channel that u.

  2022-06-01 22:03:33 Views: 277
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  MySQL string to double conversion stack frame (precision may be lost)

  1. Conversion case A recent case in which a friend discussed the loss of precision in string conversion double is as follows: this case comes from a friend Xu Chenliang root@mysqldb 22:12: [xucl] > show create table T1\ Gaming accuracy *

  2022-06-01 22:03:30 Views: 216
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  Introduction to the method of aggregation

  Aggregation provides various data processing methods for collecting document data and returns the results of the calculation. MongoDB provides three ways to execute aggregation commands: the aggregation pipeline method, the map-reduce method, and the single-target aggregation method. 1. Poly

  2022-06-01 22:03:30 Views: 273
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  How does the account system deal with the problems of high concurrency and hot accounts?

  The core of Internet financial system is payment and settlement, and the basis of payment and settlement is account system. The mutual fund account system is characterized by large concurrency, fast response, large transaction amount, and prominent hot account problems. A qualified account system must not only solve the above problems, but also absolutely ensure the safety of funds. As trustworthy, this

  2022-06-01 22:03:14 Views: 276
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  Automatically install MongoDB Master, Slave, Arbiter scripts

  Found that someone plagiarized my article, unexpectedly did not write the source, think about it is also very happy, will also be plagiarized, used to be plagiarized in junior high school is to copy other people's homework. I have changed this article many times, and that guy copied the code that was a little bit bug before. After he sees it, copy it again so as not to mislead the son of Man.

  2022-06-01 22:03:14 Views: 251
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  The start-up meeting of IEEE trusted Internet of things data Management working Group led by Liyuan Science and Technology was held.

  On October 15, 2019, the IEEE Standards Association P2144 trusted Internet of things data Management working Group led by material Edge Technology was successfully held. Enterprise representatives and technical experts in the field of Internet of things and blockchain technology attended to jointly discuss the data management of Internet of things and trusted data based on blockchain.

  2022-06-01 22:03:11 Views: 214
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  An example of error report in OGG startup

  Using OGG to migrate the database, an error was reported when configuring OGG to start, and the error is as follows: Baidu checked and said that it was set to automatically start the remote replication process and needed to add source port and ip, but I found that the local OGG did not set anything for remote replication. In fact, it was because of OG.

  2022-06-01 22:03:08 Views: 241
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  MongoDB sharding cluster

  1. About sharding 1. What is a sharding database application with high data volume and throughput will cause great pressure on the performance of the stand-alone machine. A large query will exhaust the CPU of the stand-alone machine, and a large amount of data will cause greater pressure on the storage of the stand-alone machine, which will eventually deplete the memory of the system and transfer the pressure to the disk IO. Mong

  2022-06-01 22:02:49 Views: 272
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  Further discussion on the Mechanism and principle of mysql Lock-the interpretation of Lock

  Locking is a very important technology to realize database concurrency control. When a transaction makes a request to the system and locks it before operating on a data object. After locking, the transaction has some control over the data object, and other transactions cannot change the data object until the transaction releases the lock.

  2022-06-01 22:02:20 Views: 243
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  Series of articles on TiKV Source Code parsing (11) Storage-transaction Control

  Background knowledge TiKV is a strongly consistent distributed KV storage that supports transactions. TiKV uses raft to ensure strong consistency among multiple replicas. The transaction TiKV refers to Google's Percolator transaction model and implements the

  2022-06-01 22:02:19 Views: 203
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  Mysql8.0 binary installation

  Mysql8.0 binary installation 1. Create directory authorization groupadd mysqluseradd mysqlmkdir-p / usr/local/mysql/mkdir-p / usr/local/mysql/

  2022-06-01 22:02:19 Views: 288
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  View the daily archive size of the Oracle database

  1. Log location SQL > select group#,member from vault logfileterGROUP# MEMBER--

  2022-06-01 22:02:19 Views: 257
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  Mongodb installation, operation

  Installation of mongodb 1: download mongodb www.mongodb.org download the latest stable version 2: extract the file 3: no compilation, itself is a compiled binary executable. 4: start the mongod service. / bi

  2022-06-01 22:02:16 Views: 267
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  Deploy and install Mahout

  Introduction to Mahout Mahout is an open source project under Apache Software Foundation (ASF), which provides the implementation of some scalable classical algorithms in the field of machine learning, designed to help developers create more easily and quickly

  2022-06-01 22:02:14 Views: 236
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  Redis Learning 6Murray-Master-Slave Environment configuration

  1. Omit the compilation and installation process 2. Master-slave configuration vi / data/usr/redis-4.0.11/conf/redis.confmaster:bind 127.0.0.1 192.168.121.121daemon

  2022-06-01 22:02:05 Views: 272