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Questions tagged [distributed-database]

Anything related to distributed databases and the techniques and the tools used to manage them. A distributed database is a database whose information is not stored in a single physical location, but it is spread over various devices, often placed far apart.

Anything related to distributed databases and the techniques and the tools used to manage them. A distributed database is a database whose information is not stored in a single physical location, but it is spread over various devices, often placed far apart.

188 questions
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Configure hadoop/hbase in fully-distributed mode

I'm new in Hbase and I need to do some experiments with it in fully distributed mode. I am using ubuntu. I want create a cluster with two nodes (a master and a slave) and according to what I read, HBase runs under a Hadoop Distributed File System…
Pedro Cunha
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How to change connectionsPerHost and threadsAllowedToBlockForConnectionMultiplier configuration in mongdb through mongo shell?

I need to change threadsAllowedToBlockForConnectionMultiplier and connectionsPerHost values in mongodb from their default value through mongo shell instead of a program. How can I go about it?
Siddharth
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how to set up an horizantal Partiting Distributed database Enviroment between two servers

suppose that i have a database for employees and i want to distribute the queres on two different servers at differnt location , let's say location a & location b . I'm wondering how to distribute a table into two servers interconnected by network…
Abo gaseem
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Distributed Mutual Exclusion: Coterie Formation

I have been studying distributed mutual exclusion algorithms based on the concept of Quorums. Quoting: A Coterie C is defined as a set of sets, where each set g ∈ C is called a quorum. The following properties hold for quorums in a coterie: 1)…
sg1
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Making backup from database to another server

I have a host on a server and that contains an SQL Server Database. I have another server in another country and i want have a backup from the database every 5 minutes or after each transaction only insert new row to another database. After some…
Saman Gholami
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Who do large key-value stores scale better horizontally than document databases?

In this presentation there was a chart that showed the following horizontal scalability ceiling as data gets larger: key-value > column family > document database > graph database http://youtu.be/UodTzseLh04?t=13m36s In other words, as data gets…
Sridhar Sarnobat
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Fault Tolerant Write-only Highly Distributed Database

Scenario: I have a database that accepts writes from a set of geographically distributed clients over unreliable links. The clients just do write operations, and possible reads on the data of their own last 2 to 3 write operations. Older data is…
Samveen
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How to support GUID in Windows Azure Mobile services

It is specifically mention that WAMS needs a int ID column to work in SQL Azure. However when developing enterprise apps over distributed databases, GUIDs are the preferred Primary key to have. How does one get around avoiding int ID column and…
user1763470
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Modify foreign key to create a distributed database

I'm distributing a database but I have two tables with foreign keys references to the other database in other server. I have already searched and found that I can't make a foreign key referring to a table in another database in other server. But,…
Ninita
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mongodb indices and scaling

Reading the MongoDB documentation for indexes, i was left a little mystified and unsettled by this assertion found at: http://docs.mongodb.org/manual/applications/indexes/#ensure-indexes-fit-ram If you have and use multiple collections, you must…
lurscher
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Distributed Database

I NEED YOUR HELP ANY IDEA ANY SOLUTION SCENARIO: An organization suppose Jason industries have its branches in different regions of country. In each branch there is a local database where they maintain their data locally. Suppose one branch in…
Abdul Majid
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Looking for a lightweight-ish distributed DB/cache

I will store simple plain text, but I'm looking for these features from a (D)DB/cache: Replication across all nodes Adding nodes to a live cluster It's free Persistence to disk (not to another DB) Uses relatively little resources Apache ZooKeeper…
user963395
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Why CQRS and Event Sourcing design pattern is getting popular recently?

Command Query Responsibility Separation (CQRS) and Event Sourcing (ES) pattern has been around for more than a decade. However, in recent years, many people are familiarizing themselves with these patterns. Is there any reason like technological…
AmanLonare
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how to return updated and previous value through a stored procedure?

help needed regarding an assignment: Write a stored procedure, which takes EID and CITY as an argument, and update city of the employee of given EID. After updating city, you must display old city and new city of employee along with his/her name.I…
ashiq pervez
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How to create a local distributed database using multiple laptops or virtual machines?

I want to run an academic experiment and need to create a distributed database. My plan is to use four devices: two of them running the database, one running a load balancer algorithms and the other sending requests. How do I create this local…
Palash Sharma
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