PostgreSQL: Can I do pg_start_backup() on a live, running db under load?
Our established replication has broken ("requested WAL segment has already been removed" during downtime) We cannot easily stop the master again. Can we do pg_start_backup(), rsync ${PGDATA}/ master to...
View ArticleAfter Restore Log_reuse_wait_desc of Replication
I'm wondering if anybody has ran into this issue before and has any suggestions on what's causing it/how to fix it. We are restoring a database into lower Dev environments and after the restore the...
View ArticleMeta Destination Owner Differs From Actual Owner
How can the replication meta data table differ from the properties of the publication through the interface; for instance ... SELECT destination_owner FROM distribution..MSarticles Yet, when selecting...
View Articleneed to know about abcde.* in the below query [on hold]
please let us know what would be the result of the below query and explain with it SELECT count(*) over() as rowncnt, abcdef.** FROM( select * from xyz) abcdef here what is the need of abcdef in two...
View ArticleHyper V replication - vs - sql replication solutions
I need to establish an offsite copy of a number of production servers, including SQL server. Hyper V replication has been chosen as a simple solution (all servers are virtual). This is to supplement...
View Articlehow to solve error 1778 on mysql server 5.7.12 multi source replication on...
Cannot execute statements with implicit commit inside a transaction when @@SESSION.GTID_NEXT == 'UUID:NUMBER'. Error_code: 1778 this is the error message in the error log file slave sql running is...
View ArticleChallenge: Active Replication Ordering Scenario?
I have a question about active replication and ordering. I am aware that traditionally active replication in a distributed system requires total ordering to propagate requests to replicas, however, I...
View ArticleMysql replication error Last_IO_Error
We have existing server master to master replication on two server, and we not mentioned 11.12.13.18 ip in any where, but we are getting error like below. Last_IO_Error: Master command...
View ArticleHDFS: Majority of DataNodes needed for operation?
I have an HDFS Cluster where I have stored a file that has a replication factor of 3. If one DataNode is down, I should still be able to read, delete and upload that file again. HDFS should recognize...
View ArticleTransactional replication subscriber vs AG secondary replica for reporting
I am trying to recommend my client a SQL server upgrade (from 2005-> 2014) which will allow the users to create record snapshot (via SSRS) from a read-only data source. Data latency should be kept...
View Article"Oneway" Replication from Oracle DB to TimesTen
currently I'm really stuck into a problem and I not able to finde a nice way to realize that. I need a suggestion to replicate from oracle db (some tables) to a TimesTen. A connection is only possible...
View ArticleMySQL table replication on the same server
I have one the same server (Linux) two databases: db1 and db2 and I want to replicate db1.table1 to db2.table1 I added the following lines to my.cnf and restarted mysql service replicate-do-table =...
View ArticleIf replication is 600 seconds behind master will INSERT or UPDATE queries...
If slave is behind master by 600 seconds, will queries including NOW() also be 600s different? Example: master|mysql> INSERT INTO my_table (hash,my_time) VALUES ('foo',NOW()); ### 600s later, does...
View ArticleScripting SQL Server Replication
I am trying to use SSIS to take a backup of Replication scripts. I am using Script task and using ReplicationServer class under Microsoft.SqlServer.Replication. The problem is, the package is failing...
View ArticlePostgres multidisk master replicating to single disk slave
I have an odd situation. I have a postgreSQL database master with multiple large tablespaces divided across 3 physical disks. I am setting up a slave that will be used to offload long, time-insensitive...
View ArticleIs it possible to have MySQL slave outside firewall
For various reasons I need one of the databases from intranet MySQL server to be made available to (insecure) online server. Due to the requirements it was decided that a db dump will be used via cron...
View ArticleRedis replication at key level
We are using redis. We have two set of data. One set of data(Assume it is using the prefix redis:local: eg: redis:local:key1) is used by the main application and no need of replication. Another set of...
View ArticleAdding a distributor for availability groups
According to this MSDN article, I need to add a distributor: Configure Replication for AlwaysOn Availability Groups (SQL Server) I'm confused by this particular statement: The distributor should not be...
View ArticleZooming an image in java by Repication Method
I am trying to read an image, zoom it in to 80*60 and then make it duplicated in size by replication method. My methods work well individually, but when when I call them in the main method my image...
View ArticleWhich one to use? InnoDB Replication or MySQL Cluster?
I am building a url shortener and I use InnoDB as the storage engine for link data. I will start with a single VPS containing both application instance and MySQL database instance on the same Virtual...
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