One part of my job involves designing the virtualization model for our internal unified communications (UC) system deployments around the world. A critical task in this design is specifying which UC virtual machines (VMs) can share a Cisco Unified Computing System (Cisco UCS) server chassis or blade and which ones can’t. When migrating UC servers to a shared virtual environment, we need to make sure we carefully balance each VM’s needs for CPU, storage, network and memory. Read More »
In an earlier post, my colleague Reid Bourdet described how we migrated our largest Cisco Unified Communications Manager (Cisco UCM) cluster to a virtual machine environment running on Cisco Unified Computing System (Cisco UCS) servers. This was the 19-node (server) Cisco UCM cluster that serves the Cisco headquarters campus in San Jose, California; and we completed the migration over a weekend.
What makes that move even more interesting is that we’re nearly done consolidating 5 separate clusters into one virtual environment, and reducing the total number of servers by a factor of four. Virtualization on the Cisco UCS hardware allows us to consolidate multiple UCM nodes on a single blade. In this post, I’ll provide more details about the scope of this migration, the results we’ve gained, and how we’ll continue migrating other Cisco UCM clusters to Cisco UCS servers around the world.
Today I want to bring up DCI use case that I’ve been thinking about: capacity expansion. As you know, the purpose of DCI is to connect two or more Data Centers together so that they share resources and deliver services. The capacity expansion use case is when you have temporary traffic bursts, cloud bursts, either planned or unplanned, maintenance windows, migrations or really any temporary service event that requires additional service capacity.
To start addressing the challenge of meeting these planned and unplanned cloud burst and capacity expansion requirements, check out the new ACE + OTV feature called Dynamic Workload Scaling announced recently.
Tags: ACE, Burst, Capacity Expansion, Cisco, cloud, Cloud Burst, data center, Data Center Interconnect, DC, DCI, DWS, Dynamic Workload Scaling, locality, Nexus 7000, OTV, SASU, Systems Architecture and Strategy Unit, virtual machine, VM, VM Locality
I suppose that I could have titled this blog post as, “The Value of the Network for Cloud Computing”, but I wanted to focus on the viewpoints that I often hear from end-users or application owners. They tend to look at the network as a conduit to their information, and the bigger the pipe the better. The “bandwidth is more important than oxygen” theory. While I can obviously understand this viewpoint from groups that consume the network from the perspective of bandwidth, it’s important to remember that the network is the fundamental element that allows Cloud Computing (Public, Private or Hybrid) to exist in the first place.
So let’s talk about some of the myths and misunderstandings around Cloud and the network… Read More »