Benchmarking Suricata in Different Isolation Systems Using TCPreplay
Containers like LXC are becoming a popular solution to program isolation. Compared to virtual machines (VM), containers tend to have less resource overhead and higher performance, which makes it interesting to explore how much benefit we can get from deploying virtual network functions (VNF) with containers instead of VMs. Therefore, we conducted an experiment in which we compared performance and resource usage of Suricata, a popular multi-threaded IDS program, in bare metal, Docker container, and virtual machine setups, and in different load levels and resource allocation configurations.
Continue readingonedrived - Microsoft OneDrive client for Linux
onedrived is a client program for Microsoft OneDrive on Linux platform.
It enables you to sync local directories with remote OneDrive repositories
(a.k.a., “Drive”) of one or more OneDrive Personal account (OneDrive for
Business accounts are not yet supported).
The program is written in Python3, and uses official OneDrive Python SDK to communicate with OneDrive server, Keyring to securely store account credentials, and Linux inotify API to monitor file system changes.
Continue readinggitlab-ag - Combining Git and Autograding
Planned in December 2014 and first released in January 2015, gitlab-ag is a project that aims to enhance GitLab, an open-source GitHub-like system, for educational use. The primary goal is to facilitate batch operations on GitLab and integrate automated grading mechanism, thereby replacing the AutoGrader system used in the past. It runs as a standalone website that manipulates GitLab API. GitHub Repository: https://github.com/xybu/gitlab-ag Documentation: https://github.com/xybu/gitlab-ag/blob/master/README.md License: GPLv2 Features Import / delete users in batch: import students (GitLab users) from CSV when a new semester starts, and delete all users after semester ends. Continue readingIE Cache Location and Metro App Crash
For very long time I have been creating RAM disk and pointing temp and cache dirs there to improve I/O performance and reduce unnecessary SSD writes. Since Windows 8, changing the cache location of IE (a.k.a. “Temporary Internet Files”) to a RAM disk could result in crashes of Metro (a.k.a. “Modern”) apps, which I didn’t figure out why until recently. The problem is also observable in Windows 10.
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Set up Ubuntu + PHP7 + Nginx + MySQL Stack
This tutorial introduces how to set up a LEMP (Linux + Nginx + MySQL + PHP-FPM) stack on Ubuntu Server from scratch.
Continue readingPurdue CS240 Autograder
For historical curiosity, this page records the work of Autograder, an automated grading platform used in Purdue CS240 “Programming in C” course. Students submit code for grading and later receive grades. This platform encouraged students to try achieving best score and also greatly reduced TAs’ workload. In Fall 2014 a new project gitlab-ag, based on GitLab, replaced Autograder. Autograder has been deprecated. The purpose of this page is to summarize the knowledge and experience gained from this project so that we make better things in the future. Continue reading