Blog Section
Network latency significantly affects the performance of applications or services that interact with the network. The lower the latency, the higher the performance. This is true for any network service, ranging from a regular website to a database or network storage. A good example is the Domain Name System (DNS). DNS is inherently a distributed system, with root nodes scattered […]
Once, I faced the task of granting one of my clients the right to edit PTR records for the given /28 subnet. I don't have automation for editing BIND settings externally. So I decided to take a different approach—delegate a piece of the PTR zone of the /24 subnet to the client. It seemed simple enough—just set the subnet correctly and point to the desired […]
In one of our previous articles regarding infrastructure planning when deploying the Zimbra Collaboration Suite in enterprises, it was mentioned that the primary limitation when operating this solution is the read/write speed of disk devices in mail storage systems. Indeed, at a time when several hundred employees are simultaneously accessing the same mail storage, the bandwidth for […]
TP-Link has released the Deco W2400 system, designed to deploy a Wi-Fi network in a large private house or apartment. The kit includes two routers. It is claimed that they can cover an area of up to 280 square meters with a quality Wi-Fi signal. If needed, the system can be supplemented with additional routers. The devices can operate in two frequency bands — 2.4 GHz and […]
It seemed that after the vulnerabilities Meltdown and Spectre discovered over a year ago, nothing could surprise fans and users of Intel processors anymore. Yet again, the company managed to astonish us. More precisely, it was the researchers of vulnerabilities in Intel's microarchitecture that surprised us. A new set of vulnerabilities collectively known as microarchitectural data sampling (MDS) threatens to put a halt to the technology of multithreaded computing or […]
As with most posts, a problem arose with a distributed service, let’s call this service Alvin. This time, I didn't discover the issue myself; it was reported to me by the client-side team. One day, I woke up to a disgruntled email about significant delays with Alvin, which we planned to launch soon. Specifically, the client was facing a 99th percentile delay in […]
This year’s vulnerability discovered in Exchange allows any user in the domain to gain domain administrator rights and compromise Active Directory (AD) and other connected hosts. Today, we will explain how this attack works and how to detect it. Here’s how the attack operates: The attacker seizes the account of any domain user with an active mailbox to subscribe to the […]
In May, RUVDS opened a new hermetic zone in Germany, in the country's largest financial and telecommunications city, Frankfurt. The highly reliable Telehouse Frankfurt data center is one of the data centers of the European company Telehouse (headquartered in London), which is in turn a subsidiary of the global Japanese telecommunications corporation KDDI. We have discussed our other sites multiple times before. Today, we will talk about […]
An update for the virtualization system VirtualBox 6.0.8 has been released. Among the main changes: Fixes for errors during kernel module builds with non-standard configurations. Fixes for errors when attempting to restore from a saved VM state. UI change: full paths to files are now displayed in the New Medium window. UI change: fixes for issues with mouse click passthrough in multi-monitor VM configurations. […]
At the beginning of this month, on May 3rd, a significant release of the 'management system for distributed data storage in Kubernetes' was announced — Rook 1.0.0. Over a year ago, we published a general overview of Rook. At that time, we were asked to share our practical experience with it — and now, just at this important milestone in the project's history, we are pleased to […]
The use of solid-state drives in the field of data storage is no longer surprising. SSDs have firmly entered the IT equipment landscape ranging from personal computers and laptops to servers and storage systems. Over time, several generations of SSDs have emerged, each offering improved performance, reliability, and maximum capacity. But the question of monitoring write resources […]
The future 'father' of Soviet cosmonautics, Sergey Korolev — in the center. His passion for aviation began in his youth when he joined a glider club. He will face many challenges ahead, but his youthful enthusiasm will stay with him for life. Note: the photograph has been colorized using a service from Mail.ru. Their neural network performed much better than, for example, […]