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MySQL stress test tool, remote server preferred

For MySQL stress test there exists programs: http://dev.mysql.com/doc/mysqltest/2.0/en/test-programs.html Also mysqlslap exists: http://dev.mysql.com/doc/refman/5.5/en/mysqlslap.html Is it possible ...
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Using PGBouncer with HAProxy results in connection errors only after load testing

We have a website (flask python based) which is load balanced between to instances. This two clients have both their own pgbouncer master which connects to a single HAProxy which is round robin ...
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83 views

Error to connect mongos when trying to create replicated sharded cluster

I'm trying to create an replicated sharded cluster in mongodb. Initially I've created two shards and there are a replica set with three members in each shard. And all the shards and replicasets run in ...
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116 views

Mongodb: slow shard balancing

I've decided to shard a collection with 500M+ documents into 24 shards. All shards are on the same machine without replicas as was advised in this title (core sharding). The shard key is {"_id":1}. I ...
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73 views

Connection occasionally fails connecting to MySQL on Amazon RDS from PHP

We're moving MySQL databases from our own EC2 instance, to a multi-zone RDS instance. These are accessed from a load balanced lighttpd + PHP cluster. We've noticed that quite often, in the morning, ...
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645 views

Solved Mysql connection lost with HAProxy

I have master-master replication with mysql. and haproxy configured front of my master-master replication. When I connect my replication via HaProxy, mysql says that "MYSQL has gone away". But when I ...
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1answer
214 views

Are TCP loadbalancers an alternative to Postgres 9.X read slaves load balancers like pgPool II or pgBouncer?

To scale read traffic on PostgreSQL streaming replication slaves, I want to be able to load-balance the requests. Postgres documentation suggests using tools like pgPool and pgBouncer, but I am ...
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514 views

Confused about load balancing and horizontal scaling in postgresql [closed]

Please correct me if I am wrong but I guess handling more requests and load by adding more machines or balancing the load between multiple servers is horizontal scalling. So, if I add more servers, ...
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188 views

pgpool2 not working on my Ubuntu i686 athlon i386 GNU/Linux

I am trying to implement replication and load balancing on my Ubuntu i686 athlon i386 GNU/Linux.for creating database clustures I have installed postgresql contrib 9.1.11 having initially database ...
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1answer
36 views

MongoDB Balancer:move data inside replication set or across replication set?

After reading the document of mongodb on the balancer topic , I have two questions: 1.If I set Balancer on , will the db operation efficiency will be influenced ? 2.Still ,I cannot understand ...
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2k views

PostgreSQL High Availability/Scalability using HAProxy and PGBouncer

I have multiple PostgreSQL servers for a web application. Typically one master and multiple slaves in hot standby mode (asynchronous streaming replication). I use PGBouncer for connection pooling: ...
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1answer
737 views

How can I configure SQL Server 2012 to use multiple NICs?

How can I configure SQL Server 2012 to use multiple NICs? I've a server with 4 NICs. I want to use 2 NICs to query my databases, and 2 NICs to retrieve results from them. I want them to work in load ...
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1answer
243 views

LoadBalancing JDBC DataSource Connect without URL

When using JDBC I like the new DataSource-way to establish the connection. Further I like the isolated set-Methods for the properties like setUser, setPassword, setDriverType, setServerName, ...