-2
votes
1answer
49 views

What's the best way to sync folders across 03 or more webservers? [closed]

I have 03 servers and I want to sync some folders across them. I'm using DRBD + OCFS2 for a year or so, but it doesn't support more than 02 servers right now. I read about GlusterFS and CEPH, but ...
1
vote
1answer
107 views

Best PostgreSQL HA strategy for 99% read scenario?

I'm in the process of building out a new PostgreSQL (9.3) environment in which traffic hovers around 99% read. We'll have 2 very powerful machines, connected via 1Gb ethernet. With the multitude of ...
4
votes
2answers
289 views

How to change the master in a MongoDB cluster without restarting the process?

Reading the documentation of MongoDB about how to configure a master-slave configuration of a cluster (our cluster will have more than 12 nodes, so unfortunately we can't have a replica-set ...
0
votes
1answer
54 views

Oracle replication A->B and B<-A?

If you have two unrelated Oracle databases on separate servers, can you replicate A to B and B to A so both servers have a copy of both db's? Idea is for DR "on the cheap" without buying more Oracle ...
2
votes
4answers
96 views

Looking for a solid redirection infrastructre [closed]

We have critical servers (webservers and databases) that are fully replicated, except for the reverse proxy that we use to hide the internal stuff. This proxy is acting like a router that filters and ...
2
votes
2answers
230 views

How many mongod instances should I run with a 2 server replicaset setup?

Currently I've got server A and server B running with the following mongod instances: Server A mongod server (usually PRIMARY) mongod arbiter Server B mongod server (usually SECONDARY) When ...
0
votes
1answer
231 views

How to use AppScale

There are some wiki which explain how to install and setup AppScale. But I didn't find anything related to the extensive use of AppScale. I mean, what to do in case of major outage ? If the node ...
2
votes
4answers
497 views

Solution for two-way file-system transparent solution

I need to implement some sort of HA setup where 2 servers need to be able to always be in sync, no matter on which one you write on. The DB part can be covered by a master-master replication setup. ...
1
vote
3answers
709 views

MySQL / InnoDB replication: how to perform crash recovery?

How do I perform crash recovery in a MySQL/InnoDB Master-Slave asynchronous replication setup? Specifically: If a slave crashes, how do I make it syncs up with the master after I bring it back up? ...
2
votes
1answer
675 views

What are the advantages of async. database mirroring over transaction replication?

I've primarily a developer, but our organization is small, so I have been tasked with developing a HA strategy for our SQL servers. Currently, I manage our transactional replication to two additional ...
3
votes
3answers
2k views

How to: Hot Standby SQL Server in another datacenter?

For our SaaS app, I want to have a system in place for a datacenter wide failure. In the main datacentre, we have two servers set up with MSSQL Database Mirroring (synchronised). This provides us ...
0
votes
1answer
71 views

What configuration would allow me to keep my MySQL server(s) updated while keeping the service consistently available?

I have several Centos 5 web hosting servers with local instances of MySQL that I am looking to segment so that all servers connect to a central MySQL instance. These are web applications doing more ...
0
votes
1answer
437 views

DRBD Replication failure

A couple of weeks ago I setup a 2 nodes CRM system with one of the resources managed being MySQL over DRBD. Today for maintenance reasons I restarted both nodes but now they can't connect to each ...
0
votes
2answers
313 views

Ideas for scaling out database architecture

We're looking to scale out our existing database architecture and need some advice on which way to go. We currently have 2 web servers behind a load balancer that both read & write to a single ...
2
votes
3answers
497 views

Blade Server Cluster High Availability Questions

I have a poweredge 1855 blade server with 10 blades I am trying to setup the system to handle: 1 plesk server for mail and dns + dns replication to another machine 1 system for httpd & mysql 1 ...
0
votes
2answers
118 views

Is replication suitable for this scenario?

The case: An industrial IT system, controlling and storing data on two production lines There is one server per production line. Each server runs the automation objects for that production line. ...
2
votes
3answers
917 views

High Availability and Replication for Web Servers

I have a 3-layer web solution like this: Frontend with load balancing + proxies + static content Backend with 2 Apache web servers each one serving different sites Publishing System that pushes ...