replication

How do i run a query in MYSQL without writing it to the binary log

≯℡__Kan透↙ 提交于 2019-12-03 03:37:52
问题 I want to run an import of a large file into MySQL. However, I don't want it written to the binary log, because the import will take a long time, and cause the slaves to fall far behind. I would rather run it seperately on the slaves, after the fact, because it will be much easier on the system. The table in question is a new one, and therefore I don't really have to worry about it getting out of sync, as the master and all the slaves will have the same data in the end, because they will all

How to split read-only and read-write transactions with JPA and Hibernate

做~自己de王妃 提交于 2019-12-03 03:11:55
问题 I have a quite heavy java webapp that serves thousands of requests/sec and it uses a master Postgresql db which replicates itself to one secondary (read-only) database using streaming (asynchronous) replication. So, I separate the request from primary to secondary(read-only) using URLs to avoid read-only calls to bug primary database considering replication time is minimal. NOTE : I use one sessionFactory with a RoutingDataSource provided by spring that looks up db to use based on a key. I am

How do I check SQL replication status via T-SQL?

我只是一个虾纸丫 提交于 2019-12-03 02:11:43
I want to be able to check the status of a publication and subscription in SQL Server 2008 T-SQL. I want to be able to determine if its okay, when was the last successful, sync, etc.. Is this possible? I know this is a little late.... SELECT (CASE WHEN mdh.runstatus = '1' THEN 'Start - '+cast(mdh.runstatus as varchar) WHEN mdh.runstatus = '2' THEN 'Succeed - '+cast(mdh.runstatus as varchar) WHEN mdh.runstatus = '3' THEN 'InProgress - '+cast(mdh.runstatus as varchar) WHEN mdh.runstatus = '4' THEN 'Idle - '+cast(mdh.runstatus as varchar) WHEN mdh.runstatus = '5' THEN 'Retry - '+cast(mdh

How do I configure Solr replication with multiple cores

荒凉一梦 提交于 2019-12-02 19:43:26
I have Solr running with multiple cores. Because of the heavy load, I want to set up a slave containing the exact same indexes. The documentation http://wiki.apache.org/solr/SolrReplication states "Add the replication request handler to solrconfig.xml for each core", but I only have one solrconfig.xml. My configuration: Config: /data/solr/web/solr/conf/config files Data: /data/solr/data/solr/core data dirs Is it really necessary to copy the solrconfig.xml for each core? And where should I put these multiple solrconfig files? solr.xml <?xml version="1.0" encoding="UTF-8" ?> <solr persistent=

Copy table from remote sqlite database?

。_饼干妹妹 提交于 2019-12-02 18:37:58
问题 Is there any way to copy data from one remote sqlite database to another? I have file replication done across two servers; however, some changes are recorded in an sqlite database local to each server. To get my file replication to work correctly, I need to copy the contents of one table and enter them into the table on the opposite system. I understand that sqlite databases are not meant for remote access; but is there any way to do what I need? I suppose I could write the contents of the

PostgreSQL replication strategies

若如初见. 提交于 2019-12-02 18:31:48
Right now we are using PostgreSQL 8.3 (on Linux) as a database backend to our Ruby on Rails web application. Considering that on PostgreSQL database we actively use row level blocking and PL/PGSQL, what can we employ to secure our data -- I mean tools, packages, scripts, strategies -- to successfully replicate the database and build multi-master combination? I will appreciate master-slave suggestions as well. For example, if I put several application servers running Apache/Ruby to achieve higher performance and at the end deploy several database servers, is there any way to build multi-master

Data Replication error in Hadoop

淺唱寂寞╮ 提交于 2019-12-02 18:10:17
I am implementing the Hadoop Single Node Cluster on my machine by following Michael Noll's tutorial and have come across data replication error: Here's the full error message: > hadoop@laptop:~/hadoop$ bin/hadoop dfs -copyFromLocal > tmp/testfiles testfiles > > 12/05/04 16:18:41 WARN hdfs.DFSClient: DataStreamer Exception: > org.apache.hadoop.ipc.RemoteException: java.io.IOException: File > /user/hadoop/testfiles/testfiles/file1.txt could only be replicated to > 0 nodes, instead of 1 at > org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:1271) > at > org

What are the scenarios for using mirroring, log shipping, replication and clustering in SQL Server

老子叫甜甜 提交于 2019-12-02 18:07:28
As far as i know SQL Server provides 4 techniques for better availability. I think these are the primary usage scenarios, in summary :- 1) Replication would be primarily suited for online-offline data synchronization scenarios (laptop , mobile devices, remote servers). 2) Log shipping could be used to have a failover server with manual switching, whereas 3) Database Mirroring is an automatic failover technique 4) Failover Clustering is an advanced type of database mirroring. Am i right ? Thanks. Failover clustering is an availability technology that provides redundancy at the hardware level

Redis deployment configuration - master slave replication

只愿长相守 提交于 2019-12-02 17:43:46
问题 Currently I have two servers which I have deployed node.js/Express.JS based web services API. I am using Redis for caching the JSON strings. What will be the best option deploying this setup in to production? I see here it advices to go with a dedicated server redis. OK. I take it and use a dedicated server for running redis master. Can I use existing app servers as slave nodes? Note : these app servers are running an Node/Express application. What other other options do I have? 回答1: You can.

How do i run a query in MYSQL without writing it to the binary log

北慕城南 提交于 2019-12-02 17:05:36
I want to run an import of a large file into MySQL. However, I don't want it written to the binary log, because the import will take a long time, and cause the slaves to fall far behind. I would rather run it seperately on the slaves, after the fact, because it will be much easier on the system. The table in question is a new one, and therefore I don't really have to worry about it getting out of sync, as the master and all the slaves will have the same data in the end, because they will all import the same file eventually. I also don't want to change any of the replicate-ignore-* or binlog