Kisscache is a simple caching service developed by Linaro for the LKFT (Linux Kernel Functional Testing project at Linaro) project to cache test artefacts like kernel, dtb and root filesystem. While pretty simple, KissCache can cahe https urls without any hacks that proxies like squid will require.

Kisscache is intensively used at Linaro to reduced the amount of data downloaded by the CI system while improving reliability with automatic retries. Since it's introduction, two years ago, KissCache was able to save 1TB of data transfer and decrease the amount of network failures.

In this short introduction, I will show you the features that make this service so efficient for LKFT.