Managing High Availability in PostgreSQL – Part III: Patroni

Managing High Availability in PostgreSQL – Part III: Patroni - ScaleGrid Blog

In our previous blog posts, we discussed the capabilities and functioning of PostgreSQL Automatic Failover (PAF) by Cluster Labs and Replication Manager (repmgr) by 2ndQuadrant. In the final post of this series, we will review the last solution, Patroni by Zalando, and compare all three at the end so you can determine which high availability framework is best for your PostgreSQL hosting deployment.

Patroni for PostgreSQL

Best Trendy iPhone Rose Gold Cases

Rose gold has become a popular choice for everything from jewelry to iPhone cases. If you are looking to upgrade your current iPhone case or purchasing your first case for your iPhone 6 or 6s, then you’ll want one of these five best trendy iPhone rose gold cases.

5 Best Trendy iPhone Rose Gold Cases

Obliq Rose Gold Slim Fit Armor Case

Not only do you want your iPhone case to protect your iPhone from damage – you want it to be functional and look good while providing that protection too. The Obliq rose gold slim fit armor case is a trendy and elegant way to provide protection for your iPhone. This case is both bold and simple and snaps onto your phone easily while leaving you access to all your iPhones buttons and ports. This allows you to change your phone without removing the case, which adds to convenience to using this case.

Rose Gold Rhinestone Rangsee Case

The rose gold rhinestone Rangsee case is well loved by many users due to the fact this case really blinged out. This is an extremely eye-catching and glamorous case that features rounded edged and solidly embedded crystals. While this case isn’t Continue reading

Wow: NVMe and PCIe Gen 4

Recently it’d come to my attention that my old PC rig wasn’t cutting it.

Considering it was 10 years old, it was doing really well. I mean, I went from HDD to 500 GB SSD to 1 TB SSD, up’d the RAM, and replaced the GPU at least once. But still, it was a 4-core system (8 threads) and it had performed admirably.

The Intel NIC was needed because the built-in ASUS Realtek NIC was a piece of crap, only able to push about 90 MB/s. The Intel NIC was able to push 120 MB/s (close to the theoretical max for 1 Gigabit which is 125 MB/s).

The thing that broke the camel’s back, however, was video. Specifically 4K video. I’ve been doing video edits and so forth in 1080p, but moving to 4K and the power of Premerier Pro (as opposed to iMovie) was just killing my system. 1080p was a Continue reading

Rafay Launches Kubernetes Management SaaS With NTT as a Customer

Rafay Systems made available its software-as-a-service (SaaS) for Kubernetes lifecycle management...

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WiFi 6 Gains Certification, Inches Closer to Mass Adoption

Qualcomm has already released WiFi 6 chips and Cisco has released a series of new access points and...

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© SDxCentral, LLC. Use of this feed is limited to personal, non-commercial use and is governed by SDxCentral's Terms of Use (https://www.sdxcentral.com/legal/terms-of-service/). Publishing this feed for public or commercial use and/or misrepresentation by a third party is prohibited.

Cloudflare IPO Scorches Wall Street

The content delivery network provider’s $525 million IPO attracted strong attention with the...

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© SDxCentral, LLC. Use of this feed is limited to personal, non-commercial use and is governed by SDxCentral's Terms of Use (https://www.sdxcentral.com/legal/terms-of-service/). Publishing this feed for public or commercial use and/or misrepresentation by a third party is prohibited.

3 strategies to simplify complex networks

As the cloud era meets the demands of digital transformation, networks must change. That means for enterprises, they must become simpler, said Juniper CEO Rami Rahim, speaking at the company's annual industry analyst conference last week.The past five years has seen more innovation in networking than in the previous 30. Things such as SD-WAN, multi-cloud, Wi-Fi 6, 5G, 400 Gig, and edge computing are on the near-term horizon for almost every company. While all of those technologies have enabled the network to do so much more than ever before, their complexity has also risen.To read this article in full, please click here

Network Break 252: Big Tech Backlash Hits Google; Activist Investor Tells AT&T To Slash And Burn

On today's Network Break podcast, Google is the latest tech giant to face a tech backlash as U.S. Attorneys General launch an antitrust investigation, AT&T comes under fire from an activist investor, Microsoft partners with satellite broadband providers on ExpressRoute, Gigamon rolls out new software, and more tech news.

The post Network Break 252: Big Tech Backlash Hits Google; Activist Investor Tells AT&T To Slash And Burn appeared first on Packet Pushers.

How to freeze and lock your Linux system (and why you would want to)

How you freeze and "thaw out" a screen on a Linux system depends a lot on what you mean by these terms. Sometimes “freezing a screen” might mean freezing a terminal window so that activity within that window comes to a halt. Sometimes it means locking your screen so that no one can walk up to your system when you're fetching another cup of coffee and type commands on your behalf.In this post, we'll examine how you can use and control these actions. [ Two-Minute Linux Tips: Learn how to master a host of Linux commands in these 2-minute video tutorials ] How to freeze a terminal window on Linux You can freeze a terminal window on a Linux system by typing Ctrl+S (hold control key and press "s"). Think of the "s" as meaning "start the freeze". If you continue typing commands after doing this, you won't see the commands you type or the output you would expect to see. In fact, the commands will pile up in a queue and will be run only when you reverse the freeze by typing Ctrl+Q. Think of this as "quit the freeze".To read this article in full, please click Continue reading

The Week in Internet News: Antitrust Investigations of Big Tech Heat Up

Playing monopoly: Antitrust investigations of large U.S. tech companies are launching, with 48 state attorneys general announcing a Google probe, Salon.com reports. The focus is on Google’s alleged domination of online advertising. Meanwhile, the U.S. House of Representatives Judiciary Committee has asked Facebook, Amazon, Apple, and Google parent company Alphabet to turn over documents in its own antitrust probe, CNBC.com says. The House committee seems to be focused on Facebook’s and Google’s recent acquisitions, Amazon’s promotion of its own products, and other issues.

Broadband Island: Anacortes, Washington, on Fidalgo Island near Seattle, is building its own broadband network, Geekwire.com notes. The city is using existing water lines to install fiber optic cable, and the service will cost residential customers $39 per month for 100 Mbps service and $69 for gigabit speeds. 

The Internet of Gasoline: Hackers are increasingly talking about ways to target Internet of Things connected gasoline pumps, ZDNet reports. It’s unclear whether hackers are targeting gas pumps as a way to get cheaper gas or for more destructive reasons. Smart electricity meters are also a target, with the goal of reducing bills, the story suggests.

Free the root: CircleID.com has an Continue reading

Tech Bytes: Oracle And The Failsafe SD-WAN (Sponsored)

Today's Tech Bytes dives into failsafe SD-WAN with sponsor Oracle. We discuss how Oracle provides Quality of Experience through techniques such as continuous unidirectional measurement and sub-second response to network events. Our guest is Andy Gottlieb, VP, SD-WAN Solutions at Oracle.

The post Tech Bytes: Oracle And The Failsafe SD-WAN (Sponsored) appeared first on Packet Pushers.

Just Published: High-Level Azure Networking Concepts

Last week we started the Microsoft Azure Networking saga that will eventually mirror the AWS Networking materials.

I recorded the hands-on demos in advance so we had plenty of time to discuss Azure API and CLI, geographies, regions and availability zones, high-availability concepts, and deployments models… and spent the second half of the live session focusing on virtual networks, subnets, interface, and IP addresses. The videos are already online and accessible with Standard ipSpace.net Subscription.

Next step (on September 24th): network security and user-defined routes.

Fine-grained, secure and efficient data provenance on blockchain systems

Fine-grained, secure and efficient data provenance on blockchain systems Ruan et al., VLDB’19

We haven’t covered a blockchain paper on The Morning Paper for a while, and today’s choice won the best paper award at VLDB’19. The goal here is to enable smart contracts to be written in which the contract logic depends on the history, or provenance of its inputs.
For example, a contract that sends a reward amount of tokens to a user based on that user’s average balance per day over some period.

That’s hard to do in today’s blockchain systems for two reasons:

  1. Provenance can only be determined by querying and replaying all on-chain transactions, which is inefficient and an offline activity.
  2. As a consequence the computation of provenance and issuing a subsequent transaction are decoupled and hence there are no serializability guarantees. “In blockchains with native currencies, serializabiliy violations can be exploited for Transaction-Ordering attacks that cause substantial financial loss to the users.”

In other words, smart contracts cannot access historical blockchain states in a tamper-evident manner.

In designing a blockchain-friendly provenance mechanism, three aspects unique to the blockchain environment differentiate the problem from that of traditional database provenance:

  1. There are no Continue reading

If You Travel to Slovenia, You SHOULD NOT Fly with Adria Airways

I apologize to my regular readers for a completely off-topic post, but if I manage to save a single traveller the frustrations I experienced a few weeks ago it was well worth it. Also, please help spread the word…

TL&DR: If you travel to Slovenia, DO NOT even consider flying with Adria Airways (and carefully check the code-share flights, they might be hiding under a Lufthansa or Swiss flight number). Their actual flight schedule is resembling a lottery, and while I always had great experience with the friendly, courteous and highly professional cabin crews, it’s totally impossible to reach their customer service.

2019-09-30: The agony ended sooner than I expected. On September 30th Adria Airways declared bankruptcy, ending the frustration and uncertainty of thousands of passengers they left stranded across Europe for almost 10 days. So long Adria, and thanks for all the good flights (we'll eventually forget all the mess you made in the last year)

2019-09-22: Added updates on what happened during last week. The whole thing is becoming a soap opera

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WISP Design – Migrating from Bridged to Routed

TFW adding the 301st subscriber to your bridged WISP….

 

 

Why are bridged networks so popular?

  • Getting an ISP network started can be a daunting task. Especially, if you don’t have a networking background.
  • Understanding L1/L2/L3 is not easy – I spent a number of years working in IT before I really started to grasp concepts like subnetting, the OSI model and Layer 2 vs. Layer 3. It takes a while.
  • Bridged networks are very attractive when first starting out. No subnetting is required and the entire network can be NATted out an upstream router with minimal configuration.

 

What does a “bridged” network look like?

  • Bridged networks use a single Layer 3 subnet across the same Layer 2 broadcast domain (typically over switches and software/hardware bridges) which is extended to all towers in the WISP
  • Bridging can be done with or without VLANs but they are most commonly untagged.
  • The diagram below is a very common example of a bridged WISP network.

 

What is the difference between switching and bridging?

These days, there isn’t much difference between the two terms, switch is a marketing term for a multiport hardware-accelerated bridge that became popular in the 1990s to Continue reading

WISP Design – Migrating from Bridged to Routed

TFW adding the 301st subscriber to your bridged WISP….

 

 

Why are bridged networks so popular?

  • Getting an ISP network started can be a daunting task. Especially, if you don’t have a networking background.
  • Understanding L1/L2/L3 is not easy – I spent a number of years working in IT before I really started to grasp concepts like subnetting, the OSI model and Layer 2 vs. Layer 3. It takes a while.
  • Bridged networks are very attractive when first starting out. No subnetting is required and the entire network can be NATted out an upstream router with minimal configuration.

 

What does a “bridged” network look like?

  • Bridged networks use a single Layer 3 subnet across the same Layer 2 broadcast domain (typically over switches and software/hardware bridges) which is extended to all towers in the WISP
  • Bridging can be done with or without VLANs but they are most commonly untagged.
  • The diagram below is a very common example of a bridged WISP network.

 

What is the difference between switching and bridging?

These days, there isn’t much difference between the two terms, switch is a marketing term for a multiport hardware-accelerated bridge that became popular in the 1990s to Continue reading

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