WalB is an open-source backup system that consists of block devices, called WalB devices, and userland utilities, called WalB tools. A WalB device records write-I/Os. WalB tools extracts them to create restorable snapshots in an incremental manner.
Compared with dm-snap and dm-thin, WalB is designed to achieve small I/O latency overhead and short backup time. We conducted an experiment to take an incremental backup of a volume under random write workload. The result confirms those advantages of WalB.
Cybozu cloud platform, which has 500TB volumes and processes 25TB write-I/Os per day, is required to achieve (1) stable workload performance without I/O spikes which may affect application user experience and (2) short backup interval specified in our service level objective. WalB satisfies the requirements, while dm-snap is not enough to and dm-thin is not expected to.
Over the last two decades, the fundamental building blocks of application delivery have evolved. It started with non-virtualized servers from Sun, moved to virtual machines from VMWare and AWS (on first private and then public clouds, the latter being called Infrastructure-as-a-Service), and then continued to buildpacks on Platform-as-a-Service offerings such as Heroku. We’ll review this evolution, and the subsequent one toward open source approaches to VMs, IaaS, and PaaS like OpenStack and Cloud Foundry.
Finally, we'll see how these pieces have evolved to the standard architecture today of orchestrated containers as part of a microservices architecture, and how Kubernetes is establishing itself as the Linux of the cloud. We'll discuss some of the advantages of a cloud native architecture, including isolation, avoiding lock-in, scalability, agility and maintainability, efficiency and resiliency.
ARM servers are about to enter the mainstream after many years of development. This is especially true in Japan, home to SoftBank, and also to the Post K ARM powered supercomputer. Jon Masters has been involved in ARM servers since the beginning. In this talk, he will discuss the history of ARM servers, explaining what defines an ARM server and how they differ from the alternatives, and how to practically build and deploy an ARM server installation. Many common issues are discussed and advice is given for those on the cutting edge who plan to deploy in 2017.
Along with factors such as performance, scalability and usability, security is one of the key characteristics by which those who deploy open source judge your project. Just like those other characteristics, it doesn't just happen on its own and needs to be prioritised.
In this talk Dr. Nicko van Someren will present the Linux Foundation's Core Infrastructure Initiative (CII) and describe some of the efforts it is making to help open source projects improve their own security. He will discuss some of the measure and steps that projects can take to enhance their security processes and discuss the CII's Best Practice Badges Program, a free open source secure development maturity model, designed with and for the open source community. Citing both good and bad examples, he’ll dive into what progress is or isn’t being made with security vis a vis the software development lifecycle.
Let's Encrypt has been a success for the open source community and for privacy in today's world. Within months of launch Let's Encrypt was one of the largest issuers of certificates on planet earth. This talk will review some of the functionality, goals and mission of Let's Encrypt and focus in on it's struggle and success as a little startup in a saturated market.
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