Vyacheslav, Автор в IT Blog

Testing a DHCP server with dhcpperf

dhcpperf is a DHCP load testing tool.

Installing FRRouting on Ubuntu 18.04

For example, I will install FRRouting on Ubuntu 18.04

How to change innodb_flush_method in MySQL

innodb_flush_method defines the method for flushing data from RAM to disk.

High CPU load on Cisco Nexus 3064

Once I discovered on the graphs a large burst of Multicast packets on one of the ports of the Cisco Nexus 3064 switch, while the CPU load increased to 30%, before that it was 12% with L2 traffic of 13 Gbit/s.

Migrating MySQL Directory

Once I created a raid, mounted it as a disk system partition and transferred the MySQL directory directly to it, but in this case there were drawbacks, the lost+found directory could appear, it could not be used for other data, etc., after that I began to transfer the MySQL directory not directly to the partition, but created a directory on it and transferred it to it.

How to update BIOS U30 on HPE DL380 Gen10

For example, I will update the BIOS U30 on the HPE ProLiant DL380 Gen10 server.

Manual update of cPanel

In this article, I will provide examples of updating cPanel and WHM.

Installing NetBox on Ubuntu

NetBox is a web application for documenting and management of computer networks.
With a large number of networks, devices, it allows you to visually place it in racks, maintain a database, etc.
For example, I will perform a test installation of NetBox on Ubuntu 18.04.

Description of DNS Amplification Attacks

In this article, I will briefly describe the principle of DDoS DNS Amplification attacks.

How to change innodb_io_capacity in MySQL

innodb_io_capacity – determines the number of write IOPS for background InnoDB tasks, such as flushing pages from a buffer pool, etc. If the cleanup operation is lagging, then InnoDB can perform cleanup more aggressively at a higher IOPS, which is defined in the innodb_io_capacity_max variable.