Author Archives: sumitkgaur

Docker CaaS

Mesos and docker based container orchestration using all opensource components and no lock-in. Continue reading

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Kubernetes Truely HA Cluster

Kubernetes Concepts  Skydns is the DNS addon for service ip . Jobs (kind:Job) are complementary to Replication Controllers. A Replication Controller manages pods which are not expected to terminate (e.g. web servers), and a Job manages pods that are expected to … Continue reading

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ZFS – Dedup/Compression is the core

*Introduction 1) RAID-Z1 is similar to RAID 5 (allows one disk to fail), RAID-Z2 is similar to RAID 6 (allows two disks to fail) and RAID-Z3 (allows three disks to fail). The need for RAID-Z3 arose recently because RAID … Continue reading

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Glusterfs – Simplicity is the Key !!

** GlusterFS *GlusterFS is a powerful cluster filesystem written in user space which uses FUSE to hook itself with VFS layer. *Filesystem in Userspace (FUSE) lets non-privileged users create their own file systems without editing kernel code. User run file … Continue reading

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OpenStack Swift for Disaster Recovery

-:Overview:- Evolving Swift where a single cluster can be distributed over multiple, geographically dispersed sites, joined via high-latency network connections. Disaster Recovery will be the mechanism for continued operations when you have multiple Swift environments in various locations. In this … Continue reading

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Software Defined Networking (SDN) and OpenStack

Software-defined networking (SDN) is an approach to networking in which control decoupled from hardware and given to a software application called a controller. 1) SDN is : a) Separation of data and control  planes and a vendor-agnostic interface (e.g. OpenFlow)       … Continue reading

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OpenStack Object Storage (SWIFT)

Swift is a multi-tenant, highly scalable and durable object storage system that was designed to store large amounts of unstructured data at low cost via a RESTful http API. The main advantage of object storage is very low implementation cost compared … Continue reading

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