MySQL DB replication hook to clean local cache
I have the app a MySQL DB is a slave for other remote Master DB. And i use memcache to do caching of some DB data. My slave DB can be updated if there are updates in a Master DB. So in my application i...
View ArticleWhat exactly are secondary members acknowledging in replicasets with MongoDB?
I try to understand the mechanics and behavior of MongoDB's replica-features better. I hope to get some insightful information from someone who is familiar with mongo's internals and behaviour. My aim...
View ArticleImpact of adjusting Time of Mongodb server?
Using Ubuntu 14.04 and mongodb 2.6.10 I have time difference between a replica machine and primary , my secondary isn't configured with NTP what are the implications of adjusting time on the secondary...
View ArticleError while deleting collection from a mongodb replica set
I have mongodb replica set but when i try to drop a collection from it is gives an error as "from exec command not master". I am using MongoDb with node js through MongoDb native driver, shouldn't the...
View ArticleMySQL relay log rotates too soon and too often
I have a simple master/slave setup where the slave is just a backup. Sometimes I notice that the relay log on the slave rotates too often and too soon, when it is still very small: 4:00 PM...
View ArticleHow to handle rowguid for replication in EF
I'm having some trouble trying to [INSERT/UPDATE] records in our database since we have implemented a replication scenario. (SQL SERVER 2012) When I try to save an entity I get these messages: Updating...
View ArticleRecords not getting replicate in Mysql 5.5 to MySQL 5.6
1. I have a MySQL 5.5 server (community edition) on one Linux server which is master. 2. I have a MySQL 5.6 server (community edition ) on another Linux server which is slave. 3. Statement based...
View Articlesql replication across domain [on hold]
i am replicating a database from one domain to another.I was thinking of creating a local windows account at publisher and subscriber and have permissions on the snap shot folder.
View ArticleCopy data from multiple databases to a central database for reporting and...
I have more than 8 databases and all are in a SQL Server environment. I need to extract data from specific tables (more than 50 tables) of each database and dump into a central database for reporting...
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missing indexes on distributor database
Looking for missing indexes on my distributor databases, I surprisingly find too many. the tables that need to be indexed are generally 3: MSrepl_commands MSlogreader_history MSdistribution_history...
View ArticleBuy Virtuoso Universal Server Comercial [on hold]
I want to purchase a commercial version of Virtuoso Universal Server for Linux, my question is if I buy the license "Virtuoso Personal Linux 7.x (Desktop)" able to replicate RDF graph three servers. ??...
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Sql Server 2008r2 Replication Snapshot Agent Hang
I am setting up a new merge publication, but I can not get the snapshot agent to run successfully. In fact, I can not run any snapshot agents for any of the other publications on this server now. This...
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Replication Lag on Postgres AWS RDS Service
We have a single master/single streaming replica Postgres 9.3 db on AWS. The load is not terribly high - this is a development/staging environment. (The production shows similar metrics). Point is the...
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What is the Relationship between HDFS Block Size and Network Replication...
Our HBase cluster has a significant amount of network traffic relative to the amount of data we believe we are writing to it via OpenTSDB. Relayed Bytes to OpenTSDB: Network Throughput in Bytes (Y Axis...
View ArticlePlay framework mysql Replication: Updates should go to a Master db only
Friends, I am using a play 2.3.x java app and want to use mysql replication , so that updates goes to Master only and not to slave, Please advise how can this be done, thanks abhishek
View ArticleFuture of "Logical Records" in SQL Merge Replication
I am building a new application which will be using SQL Merge Replication over very poor networks. It appears that the "Logical Records" feature would help significantly in coping with these network...
View ArticleBi-directional replication for the same MySQL table
AppA stores/retrieves data from dbA.tableA AppB stores/retrieves data from dbB.tableA tableA definition is the same across these databases. To start with dbB.tableA was copied from dbA.tableA (assuming...
View ArticleError on GTID Replication
During the replication usind GTID, happened this error in the slave server: Error 'Cannot execute statements with implicit commit inside a transaction when @@SESSION.GTID_NEXT != AUTOMATIC or...
View ArticleFetch Foreign Key Row Data With Sync
I am using SymmetricDS for first time and i have two table to sync. 1. Session_Tbl :- this table sync from Store to Corp. I cant make session_tbl bidirection. 2. Products :- This table sync in...
View ArticleFinding the least binary logs amount multiple slaves connected in master
I have the master server with multiple slaves (for ex: 4). I would like to purge the binary logs after checking the processed binlogs on all slaves. I wrote the below script to find the least binlogs...
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