On this Thanksgiving Eve in the US, it is easy to recount the things for which I am grateful: my family, my friends, my health, etc. Monday will be 6 years since I exited from my service in the Marine Corps. At that time I was not sure I would even stay in tech as a career (law school still seems like a good backup plan). I am incredibly grateful and humbled by my career and the trajectory it has taken in recent years. A substantial part of this has been involvement in the tech community, especially the VMware community. I’m far from the only person that has built a career on the back of the VMware community. I am thankful for the guidance and inspiration I have received over the past six years.
It is imperative for any file system to be highly scalable, performant, and fault tolerant. Otherwise…why would you even bother to store data there? But realistically, achieving fault tolerance is done through data redundancy. On the flipside, the cost of redundancy is increased storage overhead. There are two possible encoding schemes for fault tolerance: triple mirroring (RF3) and erasure coding. To ensure the Scale Data Distributed Filesystem (SDFS, codenamed “Atlas”) is fault tolerant while increasing capacity and maintaining higher performance, Rubrik uses a schema called erasure coding.
As a part of its native replication, MongoDB maintains multiple copies of data in a construct called a replica set.
So, what is a replica set? A replica set in MongoDB is a group of mongod(primary daemon process for the MongoDB system) process that maintains the same data set. Put simply, it is a group of MongoDB servers operating in a primary / secondary failover fashion. Replica sets provide redundancy and high availability.
A server’s capacity can be challenged by database systems with large data sets or high throughput applications. For example, high query rates can consume the CPU capacity of the server; likewise working set sizes larger than a system’s RAM stress the IO capacity of disks.
It’s that time of summer — VMworld US is only a few days away! Yet again I am making the trek to Las Vegas for the festivities. I wanted to highlight the sessions where I will be presenting so that you have the opportunity to either schedule and come heckle or remind yourself to watch later. I will be hanging around the vBrownBag area of VMvillage or the Rubrik booth when not presenting; come say hello!
Part of me feels like it flew by but then I remember the hours spent reviewing all the designs (*ahem* Adam) and then it feels like it took an eternity to get through. Admittedly, Virtual Design Master was probably one of the coolest community driven events in which I have participated. If you are unfamiliar with Virtual Design Master, I strongly encourage you to check out the site and catch up with the five seasons.Read More »
Job interviews are tough. It’s the equivalent of both parties deciding whether they want to get married during the first date. So, imagine my surprise when Thom Greene asked me to conduct a mock interview with him in preparation for his job hunt. Thom was game enough to even allow me to record it as a vBrownBag session.Read More »
vBrownBag EMEA is in the midst of recording sessions that cover the VCAP6-DCV Deploy (3V0-622) exam. If you are interested in presenting one of the exam objective, see the Call for Presenters post here.
Objective 2.2 – Map Service Dependencies
Skills and Abilities
Evaluate dependencies for infrastructure and application services that will be included in a vSphere design.
Create Entity Relationship Diagrams that map service relationships and dependencies.
Analyze interfaces to be used with new and existing business processes.
Determine service dependencies for logical components.
Include service dependencies in a vSphere 6.x Logical Design.
Analyze services to identify upstream and downstream service dependencies.
Navigate logical components and their interdependencies and make decisions based upon all service relationships.
Nutanix does not want to be known for simply hyper-converged infrastructure. That was made very clear during Nutanix’s .NEXT conference in Washington DC two weeks ago. As Trevor Pott said in a recent article from The Register, “if all you’ve got to sell is HCI, then your company is already dead.” Nutanix is choosing to evolve rather than die.Read More »