postgresql multi master replication

file on The file will not be the same size and number of files, the restore can only use the master binary log file, cannot use the relay log file. 7, local must have a relay log and binary log;slave-side as long as not to do multi-level replication, you can not binary log files; multi-level

So far, we have processed file-based replication (or log shipping) and simple stream-based replication settings. In both cases, after the transaction is committed on master, the data is submitted and received by slave. It will still be lost at the time that master commits and slave actually receives the data completely

Label:Basic Environment Description: 9.3 PostgreSQL version:9.3. 6 Master:192.168. 56.101 Standby:192.168. 56.102 Installation process slightly, based on pkg package 1. Configure the Master side # psql-u pgsql-d postgres-c"CREATE USER Rep REPLICATION LOGIN ENCRYPTED PASSWORD ' PASSWORD ';" # cd/usr/local/pgsql # vim

few milliseconds) or very long (minutes, hours, days). One important fact is that the data may be lost. A small lag is less likely to be a data loss, but any lag greater than 0 can easily lead to data loss.If you want to make sure that data is never lost, you must switch to synchronous replication. As you have seen in this section, a synchronous transaction is synchronous because it is valid if the thing is committed to two servers.Consider performan

Label:4.4 Stream-based and file-based recoveryLife is not always black or white; sometimes there are some shades of gray. For some scenarios, stream replication may be just right. In other cases, file-based replication and PITR are what you need. However, there are also many cases where you need both stream replication and file-based

slave, thus spreading master updates. MySQL does not support multi-master Replication-that is, one slave can have multiple masters. However, through some simple combinations, we can build a flexible and powerful replication architecture.4.1 single

server can accept the write request, and the modified data must be broadcast from the original server to all other servers before the transaction is committed. Excessive write actions result in excessive locking, which results in poor performance. In fact, the performance of simultaneous writes on multiple servers is always lower than the performance written on a single server. Read requests will be distributed evenly to each individual server. Some implementations use shared disks to reduce co

recovery (pitr,point-in-time-recovery). ] In this scenario, stream replication will resolve your issue. With stream replication, the latency of replication will be minimal and you can enjoy some extra level of protection for your data. Let's talk about the overall architecture of the PostgreSQL streaming infrastructur

Tags: mysql replicationMySQL replication principle/library-based multi-threaded replication principle/BLGC-based multi-threaded replication principleSingle thread master-slave replication:From the library to the main library to re

4.7 Conflict ManagementIn PostgreSQL, stream replication data flows in only one direction. Xlog is provided by master to several slave that consume transaction logs and provide you with a better backup of your data. You may wonder how this can lead to a conflict, which can occur.Consider the situation: as you know, there is a small delay in data

: conservative1 row in set (0.00 sec) 8. Check the dump thread in the master database. Check whether the binlog dump thread has been correctly started MariaDB [(none)]> show processlist \G*************************** 1. row *************************** Id: 7 User: root Host: 172.20.0.1:41868 db: employees Command: Sleep Time: 56 State: Info: NULLProgress: 0.000*************************** 2. row *************************** Id: 10 User: repl

4.3 Slave to master switchIf you want to extend the read or you want to make a backup of the data, a slave is a good thing. However, slave may not always be slave. At some point, you may need to convert slave to master. PostgreSQL provides some simple ways to do this. The first and most likely most convenient way to convert a slave to a

Label:5.3 Redundancy and stop replicationWhen it comes to synchronous replication, there is a phenomenon that must not be missed. Imagine that we have a two-node cluster with synchronous replication. What happens if a slave failure occurs? The answer is that master cannot easily divide the region into slow slave and fault slave, so it will start waiting for slave

wal_keep_segments heavily. The idea of this postgresql.conf setup is to keep master in more Xlog files than is theoretically needed. If you set the variable to 1000, it means that master will keep the xlog above 16GB. In other words, your slave can disappear 16GB compared to normal (convert to master). This greatly increases the slave's advantage of joining a cl

reasons, it may be necessary to maintain and restore replication again and again. Just consider a major software update. It might do some nasty things about your data structure. You absolutely don't want to have the wrong stuff copied to your system. Therefore, it is convenient to stop copying and restart it once it proves to be normal.Two functions can be used for this work:SELECT Bdr.bdr_apply_pause ()To restart again, you can use the following fun

|+------------------------+-------+ 7. Test: Create a database on the master node and view the database on the other two nodes: Create database jjj; // CREATE the database show databases on the master node; // view the DATABASE from the slave Node We can see that both slave servers can copy the data of the master server. The test was successful. In the followi

mariadb 10 Multi-source Replication (multi-source replication) Business usage scenario analysis, and how to use itOfficial MySQL a slave can only correspond to one MASTER,MARIADB 10 start supporting multi-source

Use pg_basebackup to build a PostgreSQL stream replication Environment This article introduces the high availability of PostgreSQL. Here we will first conduct a stream replication experiment. Environment:OS: [Ha @ node0 ~] $ Uname-Linux node0 2.6.32-358. el6.x86 _ 64 #1 SMP Fri Feb 22 00:31:26 UTC 2013 x86_64 x86_64 x8

The image function of csdn is too painful. You need to manually upload images. When Can Windows Live writer be opened? You are welcome to visit my personal website: www.deanlinux.com to write only some technical articles. MySQL Master/Slave architecture: In enterprise applications, MySQL often uses a master-slave architecture or a master-

Transfer from http://blog.csdn.net/beiigang/article/details/39099575PG replication, high availability, load balancing related clusters, here is a summary for your reference.PG has the following various replication-based clustering schemes, most of which were not collated at the time. Now there are many of these cluster configuration documents on the Internet, after this document to find the complete point o