Flashcube: Fast provisioning of serverless functions with streamlined container runtimes

Z Lin, KF Hsieh, Y Sun, S Shin, H Lu - Proceedings of the 11th Workshop …, 2021 - dl.acm.org
Proceedings of the 11th Workshop on Programming Languages and Operating Systems, 2021dl.acm.org
Fast provisioning of serverless functions is salient for serverless platforms. Though
lightweight sandboxes (eg, containers) enclose only necessary files and libraries, a cold
launch still requires up to a few seconds to complete. Such slow provisioning prolongs the
response time of serverless functions and negatively impacts users' experiences. This paper
analyzes the main reasons for such slowdown and introduces an effective containerization
framework, FlashCube. Instead of building a container from scratch, FlashCube quickly and …
Fast provisioning of serverless functions is salient for serverless platforms. Though lightweight sandboxes (e.g., containers) enclose only necessary files and libraries, a cold launch still requires up to a few seconds to complete. Such slow provisioning prolongs the response time of serverless functions and negatively impacts users' experiences. This paper analyzes the main reasons for such slowdown and introduces an effective containerization framework, FlashCube. Instead of building a container from scratch, FlashCube quickly and efficiently assembles it through a group of pre-created general container parts (e.g., namespaces, cgroups, and language runtimes). In addition, FlashCube's user-space implementation makes it easily applicable to existing commodity serverless platforms. Our preliminary evaluation demonstrates that FlashCube can quickly provision containerized functions in less than 10 ms (vs. ~400 ms using Docker containers).
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