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  • Grokking the System Design Interview is an interactive course that explains the Large Scale Distributed System Design problems in detail. System design questions have become a standard part of the software engineering hiring process. This course is created by hiring managers who’ve been working at Google, Facebook, Microsoft, and Amazon, and is a complete guide to master the System Design Interviews.

  • Enterprise-Grade Database Architecture. The speed and enormous scale of today’s real-time, mission critical applications has exposed gaps in legacy database technologies. Read Building Enterprise-Grade Database Architecture for Mission-Critical, Real-Time Applications to learn: Challenges of supporting digital business applications or Systems of Engagement; Shortcomings of conventional databases; The emergence of enterprise-grade NoSQL databases; Use cases in financial services, AdTech, e-Commerce, online gaming & betting, payments & fraud, and telco; How Aerospike’s NoSQL database solution provides predictable performance, high availability and low total cost of ownership (TCO)

  • What engineering and IT leaders need to know about data science. As data science becomes more mature within an organization, you may be pulled into leading, enabling, and collaborating with data science teams. While Continue reading

Worth Reading: NVMe for Data Centers

The Non-Volatile Memory Express (NVMe) specification defines a new method to access solid-state drives (SSDs) over a PCIe bus, and it’s forecasted to grow exponentially over the next few years thanks to its performance advantages and lower latencies compared with legacy protocols (such as SATA). NVMe-enabled storage infrastructures are not only seeing wide deployment, but they’re now entering other data center areas that were once typically reserved for legacy HDDs and SSDs. NVMe has become an agent for next-generation data centers. To understand this evolution, it’s important to review the history and examine some of the new application workloads that are being transformed by this protocol. —Anand Jayapalan @ The Data Center Journal

The post Worth Reading: NVMe for Data Centers appeared first on rule 11 reader.

BGP Attribute : Multi-Exit Discriminator or Known as MED

Today I am going to talk about the other BGP attribute which is widely used for the inbound traffic to come in to your network. MED is generally set by the service provider and the lower value of the MED will be selected as a preference route for incoming traffic into the network.

MED attribute is exchanged between ASs, but a MED attribute that comes into an AS does not leave the AS. When an update enters the AS with a certain MED value, that value is used for decision making within the AS. When BGP sends that update to another AS, the MED is reset to 0.

MED is called as optional non-transtive attribute and the router compares MED attributes for paths from external neighbors that are in the same AS. Hope you got the exact point of the MED use in the BGP enabled network. Lets take an topology and the configuration part of the MED. The topology and the IP addresses showing in this example is taken only for the demo purposes and have no relevance with any of the live or the enterprise network.

Fig 1.1- BGP Attribute- MED
 Configurations on Router A  

Save on School Supplies With Amazon’s Back To School Deals – Deal Alert

If you already know this page exists, let it serve as a reminder. Amazon's back to school deals page centralizes their best discounts on everything from laptops to calculators to pencils and batteries. If you still have supplies left to buy, there's plenty of time. Grab your list, fill your cart, and start putting check marks on your list while also saving some cash. Visit Amazon's back to school Electronics deals page here, or their main back to school deals page right here.To read this article in full or to leave a comment, please click here

Imanis Data focuses on big data backup and recovery

Imanis Data, formerly known as Talena, released version 3.0 of its eponymous backup and recovery platform last week with emphasis on supporting very large datasets that are being generated in the era of big data. The company notes that three out of four companies have experienced a data loss over the last year, which carries an average cost of $900,000 and weeks of downtime. With Imanis Data 3.0, the company claims its backup architecture backs up, recovers and replicates terabyte and petabyte-sized data sets up to 10 times faster than any other solution on the market, minimizing the impact of data loss by reducing costly days and weeks of downtime to minutes and hours and reducing secondary storage costs by up to 80%. To read this article in full or to leave a comment, please click here

Imanis Data focuses on big data backup and recovery

Imanis Data, formerly known as Talena, released version 3.0 of its eponymous backup and recovery platform last week with emphasis on supporting very large datasets that are being generated in the era of big data. The company notes that three out of four companies have experienced a data loss over the last year, which carries an average cost of $900,000 and weeks of downtime. With Imanis Data 3.0, the company claims its backup architecture backs up, recovers and replicates terabyte and petabyte-sized data sets up to 10 times faster than any other solution on the market, minimizing the impact of data loss by reducing costly days and weeks of downtime to minutes and hours and reducing secondary storage costs by up to 80%. To read this article in full or to leave a comment, please click here

Imanis Data focuses on big data backup and recovery

Imanis Data, formerly known as Talena, released version 3.0 of its eponymous backup and recovery platform last week with emphasis on supporting very large datasets that are being generated in the era of big data. The company notes that three out of four companies have experienced a data loss over the last year, which carries an average cost of $900,000 and weeks of downtime. With Imanis Data 3.0, the company claims its backup architecture backs up, recovers and replicates terabyte and petabyte-sized data sets up to 10 times faster than any other solution on the market, minimizing the impact of data loss by reducing costly days and weeks of downtime to minutes and hours and reducing secondary storage costs by up to 80%. To read this article in full or to leave a comment, please click here

50% off Prey for Xbox One and PlayStation 4 – Deal Alert

In Prey, you awaken aboard Talos I, a space station orbiting the moon in the year 2032. You are the key subject of an experiment meant to alter humanity forever – but things have gone terribly wrong. The space station has been overrun by hostile aliens and you are now being hunted. As you dig into the dark secrets of Talos I and your own past, you must survive using the tools found on the station, your wits, weapons, and mind-bending abilities. Right now you can get 50% off the listed price. See this deal now on Amazon.To read this article in full or to leave a comment, please click here

What is GLBP and where GLBP should be used ?

GLBP stands for Gateway Load Balancing Protocol. In this article, I will explain where GLBP is used , where it shouldn’t be used with the topologies. GLBP is a Cisco preparatory protocol. In most networks, design requirements might be to use only standard based protocols. If that is the case, GLBP is not a standard […]

The post What is GLBP and where GLBP should be used ? appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.

Quick Reference to Common AWS CLI Commands

This post provides an extremely basic “quick reference” to some commonly-used AWS CLI commands. It’s not intended to be a deep dive, nor is it intended to serve as any sort of comprehensive reference (the AWS CLI docs nicely fill that need).

This post does make a couple of important assumptions:

  1. This post assumes you already have a basic understanding of the key AWS concepts and terminology, and therefore doesn’t provide any definitions or explanations of these concepts.

  2. This post assumes the AWS CLI is configured to output in JSON. (If you’re not familiar with JSON, see this introductory article.) If you’ve configured your AWS CLI installation to output in plain text, then you’ll need to adjust these commands accordingly.

I’ll update this post over time to add more “commonly-used” commands, since each reader’s definition of “commonly used” may be different based on the AWS services consumed.

To list SSH keypairs in your default region:

aws ec2 describe-key-pairs

To use jq to grab the name of the first SSH keypair returned:

aws ec2 describe-key-pairs | jq -r '.KeyPairs[0].KeyName'

To store the name of the first SSH keypair returned in a variable for use in later commands:

KEY_NAME=$(aws  Continue reading

IDG Contributor Network: Getting data center managers & C-Suite on the same page for DCIM implementation

In any enterprise – large and small – bottom-line ROI is arguably the biggest factor driving business decisions. Whether switching from PCs to Macs, investing in new travel and expense management software or integrating data center solutions, every business unit, from HR to sales and IT, must prove the value that new processes and offerings will have on the enterprises’ bottom line. The problem? Getting buy-in from all business groups, from the C-Suite on down, can be a serious undertaking often halting or ceasing potential implementation. When it comes to the data center, no one knows this better than data center managers who must work tirelessly with C-Suite to showcase the value and benefits of next generations data center software solutions.To read this article in full or to leave a comment, please click here

IDG Contributor Network: Getting data center managers & C-Suite on the same page for DCIM implementation

In any enterprise – large and small – bottom-line ROI is arguably the biggest factor driving business decisions. Whether switching from PCs to Macs, investing in new travel and expense management software or integrating data center solutions, every business unit, from HR to sales and IT, must prove the value that new processes and offerings will have on the enterprises’ bottom line. The problem? Getting buy-in from all business groups, from the C-Suite on down, can be a serious undertaking often halting or ceasing potential implementation. When it comes to the data center, no one knows this better than data center managers who must work tirelessly with C-Suite to showcase the value and benefits of next generations data center software solutions.To read this article in full or to leave a comment, please click here

IDG Contributor Network: Getting data center managers & C-Suite on the same page for DCIM implementation

In any enterprise – large and small – bottom-line ROI is arguably the biggest factor driving business decisions. Whether switching from PCs to Macs, investing in new travel and expense management software or integrating data center solutions, every business unit, from HR to sales and IT, must prove the value that new processes and offerings will have on the enterprises’ bottom line. The problem? Getting buy-in from all business groups, from the C-Suite on down, can be a serious undertaking often halting or ceasing potential implementation. When it comes to the data center, no one knows this better than data center managers who must work tirelessly with C-Suite to showcase the value and benefits of next generations data center software solutions.To read this article in full or to leave a comment, please click here

Docker features for handling Container’s death and resurrection

Docker containers provides an isolated sandbox for the containerized program to execute. One-shot containers accomplishes a particular task and stops. Long running containers runs for an indefinite period till it either gets stopped by the user or when the root process inside container crashes. It is necessary to gracefully handle container’s death and to make … Continue reading Docker features for handling Container’s death and resurrection →

Why that “file-copy” forensics of DNC hack is wrong

People keep asking me about this story about how forensics "experts" have found proof the DNC hack was an inside job, because files were copied at 22-megabytes-per-second, faster than is reasonable for Internet connections.

This story is bogus.

Yes, the forensics is correct that at some point, files were copied at 22-mBps. But there's no evidence this was the point at Internet transfer out of the DNC.

One point might from one computer to another within the DNC. Indeed, as someone experienced doing this sort of hack, it's almost certain that at some point, such a copy happened. The computers you are able to hack into are rarely the computers that have the data you want. Instead, you have to copy the data from other computers to the hacked computer, and then exfiltrate the data out of the hacked computer.

Another point might have been from one computer to another within the hacker's own network, after the data was stolen. As a hacker, I can tell you that I frequently do this. Indeed, as this story points out, the timestamps of the file shows that the 22-mBps copy happened months after the hack was detected.

If the 22-mBps was Continue reading
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