Oracle for years has seemed impervious to cloud computing. First Larry Ellison dismissed it. Then he sort of touted it, his version at least. But all along, Oracle was growing nicely. The industry chatter didn’t seem to matter. Big companies buy big software systems.Something changed this winter.  Oracle’s software license sales limped up just 2% in December, and the company blamed customer budget cuts and fears over the European debt crisis. Sales to Europe, Africa and the Middle East make up a third of Oracle’s revenues. The stock took an instant 8% hit, but perhaps...

In this post, I will discuss a few common partition techniques in distributed cache. Especially, I will elaborate on my understanding on the use of Redis Cluster.Please understand that at the time of writing, the latest version of Redis is 4.0.10. Many articles on the same topic have a different idea from this post. This is mainly because, those articles are probably outdated. In particular, they may refer to the Redis Cluster implementation in Redis 3. Redis Cluster has been improved a lot since Redis 4.Common Partition TechniquesHere, we refer to horizontal partitioning, which...

Cloud computing has become increasingly popularity among companies. It greatly saves the investment of infrastructure and training with everything is running on cloud, it also improves the accessibility and flexibility of service provided by companies. With its popularity, many products are born or becoming popular to help build and move the apps to the cloud.Some well known names of these products are Vagrant, Docker/LXC, Chef and OpenStack. These tools can help create, test and deploy applications developed without concerning too much about platform differences. What are the relationship of ...

As a former diehard fan of Hadoop, I LOVED the fact that you can work on up to Petabytes of data.  I loved the ability to scale to thousands of nodes to process a large computation job.  I loved the ability to store and load data in a very flexible format.  In many ways, I loved Hadoop, until I tried to deploy it for analytics.   That’s when I became disillusioned with Hadoop (it just "ain't all that").At Quantivo, we’ve explored many ways to deploy Hadoop to answer analytical queries (trust me – I made every attempt to include it in my day job).&n...

This post is part of our ReadWriteCloud channel, which is dedicated to covering virtualization and cloud computing. The channel is sponsored by Intel and VMware. Read the case study about how Intel Xeon processors and VMware deliver unprecedented reliability in the face of RAM errors.For years, everyone was talking about the convergence of interfaces. The Web, and as a result, the browser, were "clearly" about to take over as the major platforms and cloud computing emerged. Then, in March 2008, Steve Jobs unleashed the iOS followed by the mobile apps revolution. What seems to have happened nex...

When installing Postgres on Windows, there is some default account created for user to login. One of them is postgres, but we often don;t know what's the password for this account when we first login using this account. We need to change the password for this account. How to change it?Step 1. Modify the pg_hba.conffileGo to the /data/ and open the pg_hba.conf.# TYPE  DATABASE        USER            ADDRESS                ...

Nimbula – the build-your-own-cloud outfit founded by Amazon's former vice president of engineering – has announced a new release of its Director platform, saying it will allow businesses to run a unified "infrastructure cloud" across geographically separate data centers.In short, this means that those using such a cloud can log into a single console to tap computing resources served up from disparate physical locations. Nimbula says that Director is the first "cloud OS" to span geographies in this way.Reza Malekzadeh, Nimbula vice president of marketing, tells The Register that D...

Computerworld - At a cloud computing conference in New York in June, a number of speakers pointed out that the cloud is moving past the hype stage and is beginning to deliver tangible benefits to organizations. These improvements include increased flexibility and agility.But moving to the cloud can also mean added costs, some of which might be unexpected, according to IT executives whose organizations have implemented cloud services or are considering them.While these types of costs don't necessarily prevent companies from getting real business value out of cloud computing initiatives, they wi...