pointer bashing since 2012.

Modern sflow? pysflowd!

Recently I’m working a lot on my so called “pysflowd” application. pysflowd is a python based sflow collector, which collects, stores, analyzes and exports (to Elasticsearch) sflow datagrams. pysflowd reads sflow datagrams from a udp socket, parses the datagram and stores the parsed data into a in-memory sqlite3 database (which […]

KVM Memory Latency

I’m recently dealing a lot with performance adjust- and measurements for flowShield v3. Interestingly, I’ve figured out, that KVM adds some serious latency to memory operations, which is problematic, as it means increased latency and at some point packetloss once for user- and kernelspace networking applications. Lets imagine, you have […]