Azure Blob Storage across serval Data Centers
Say I've a Blob Storage in Amsterdam and someone from China is accessing it, uploading a file. Does he need to send the file to Amsterdam or to his nearest Data Center ? I really appreciate it if...
View ArticleDb response is slow in one server
We have two slave servers for one master. In the two slaves we are using same mysql server(5.5.40) and same hardware and same configuration file. But in second server the query response time is high...
View ArticleConflicts between Row-Based Replication and Triggers
I am trying using MySQL Replication Listener Library to do data replication between HostA and HostB. Basiclly it's just like doing row-based replication, but by myself other than mysql. Reading all row...
View Article3 Node Replica Set all became SECONDARY
my 3 set replica set all became secondary and I'm not sure why. db1 2014-12-12T02:43:55.067+0000 [conn1413096] end connection 10.0.64.12:58483 (512 connections now open) 2014-12-12T02:43:55.067+0000...
View ArticleCapturing change deltas when database replication or CDC breaks
The company I work for is in the process of implementing change data capture on a Microsoft BI stack for the purpose of capturing incremental changes that need to be loaded into the data warehouse. So...
View ArticleWhy does MongoDB give me the cannot use 'w' > 1 when a host is not...
Here is the information about my development environment: •Microsoft Visual Studio Community 2015 •.NET Framework 4.6 •ASP.NET MVC assembly System.Web.Mvc Version=5.2.3.0 •MongoDB.Driver 2.0.1.27...
View ArticleIs there a database where slaves can handle writes to hide write latency?
I started with a multi-master Cassandra setup for my application, but I realized I don't need true multi-master functionality: I just need to be able to hide write latency by having applications write...
View ArticleMongoDB Geographically Distributed Replica Sets, why use priority 0 for...
I have read the documentation provided by MongoDB here, but I fails to explain why we should set non-primary DC secondaries to priority 0....
View ArticleCouchdb replication performance
I have an installation of three couchdb boxes that have continuous pull replications set up amongst themselves. Question: If I add a document to, say Box A, I am trying to find out how much time does...
View ArticleMySQL Multi-source - Single Slave Setup. Adding Unique Master ID on Master's...
this is a design question. I understand that Replication, is like mirroring. So this would mean, whats on the master, should be mirrored on the slave. (Is this always the case, like strictly same...
View ArticleHow to disable the replication from Solr Master for particular cores on all...
I am aware that I can disable the replication from master for all slaves as follows: http://master_host:port/solr/replication?command=disablereplication However, as per my understanding, this disabling...
View ArticleWhat are alternatives to Replication to distibute data (Microsoft SQL Server)
Is anyone knowledgeable of alternatives to SQL Server replication? I have a scenario where separate databases will share a lot of the same data which complex queries will match against. We want to...
View ArticleMySQL 5.6 replication causes 'waiting for table lock'
All of the sudden queries on slave server stopped with status "Waiting for table level lock" I restart mysql service and stop replications and locking does not show up anymore. Once I turn replications...
View ArticleSQL Server 2008R2 - how to install replication components
I am trying to install the Replication components for SQL Server 2008R2, on technet website it says: On the computer that is running IIS, insert the SQL Server 2008 R2, SQL Server 2008, or SQL Server...
View Articlereplicate local mysql server to a cloud-based mysql
We have a local mysql server(not on public domain) and want that server replicated to a google cloud sql instance that we have. My question is that: 1. is this possible? 2. our local server is...
View ArticleCouchDB Load Balancing: Primary write-only and Replicas read-only
We are looking at load balancing our CouchDB databases. The strategy of having one primary database that handles only writes, and multiple replicas that handle only reads, seems like a good solution to...
View ArticleHow can we plan for a High Avialblity in Postgresql 9.3?
I am working for mission critical project. We are palnning for High Availblity.At any point of time irrespective of the failure(n/w,Hw or db) one db server should be avilable for Application. Scenario...
View Articlemongodb replication node stuck at “STARTUP2” with optimeDate as 1970
i have just setup replica sets with three nodes . the third node is stuck at stateStr STARTUP2 with "optimeDate" : ISODate("1970-01-01T00:00:00Z"). However its showing no error message. Is this...
View ArticleMerge replication throws PRIMARY KEY violation during the initialization of...
I am using SQL Server 2014 SP1 to set up merge replication on Windows 2008. The databases (Publisher & Subscriber) are restored from the production back up of SQL Server 2005 publisher database....
View ArticlePlay framework mysql Replication: Updates should go to a Master db only [on...
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
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