Posts Tagged 'Reliability'

July 5, 2012

Bandwidth Utilization: Managing a Global Network

SoftLayer has over 1,750 Gbit/s of network capacity. In each of our data centers and points of presence, we have an extensive library of peering relationships and multiple 10 Gbit/s connections to independent Tier 1 carriers. We operate one of the fastest, most reliable networks on the planet, and our customers love it:

From a network operations standpoint, that means we have our work cut out for us to keep everything running smoothly while continuing to build the network to accommodate a steady increase in customer demand. It might be easier to rest on our laurels to simply maintain what we already have in place, but when you look at the trend of bandwidth usage over the past 18 months, you'll see why we need to be proactive about expanding our network:

Long Term Bandwidth Usage Trend

The purple line above plots the 95th percentile of weekly outbound bandwidth utilization on the SoftLayer network, and the red line shows the linear trend of that consumption over time. From week to week, the total usage appears relatively consistent, growing at a steady rate, but when you look a little deeper, you get a better picture of how dynamic our network actually is:

SoftLayer Weekly Bandwidth Usage

The animated gif above shows the 2-hour average of bandwidth usage on our entire network over a seven-week period (times in CDT). As you can see, on a day-to-day basis, consumption fluctuates pretty significantly. The NOC (Network Operations Center) needs to be able to accommodate every spike of usage at any time of day, and our network engineering and strategy teams have to stay ahead of the game when it comes to planning points of presence and increasing bandwidth capacity to accommodate our customers' ever-expanding needs.

But wait. There's more.

Let's go one level deeper and look a graph of the 95th percentile bandwidth usage on 5-minute intervals from one week in a single data center:

Long Term Bandwidth Usage Trend

The variations in usage are even more dramatic. Because we have thirteen data centers geographically dispersed around the world with an international customer base, the variations you see in total bandwidth utilization understate the complexity of our network's bandwidth usage. Customers targeting the Asian market might host content in SNG01, and the peaks in bandwidth consumption from Singapore will counterbalance the valleys of consumption at the same time in the United States and Europe.

With that in mind, here's a challenge for you: Looking at the graph above, if the times listed are in CDT, which data center do you think that data came from?

It would be interesting to look at weekly usage trends, how those trends are changing and what those trends tell us about our customer base, but that assessment would probably be "information overload" in this post, so I'll save that for another day.


P.S. If you came to this post expecting to see "a big truck" or "a series of tubes," I'm sorry I let you down.

October 18, 2011

Adding 'Moore' Storage Solutions

In 1965, Intel co-founder Gordon Moore observed an interesting trend:"The complexity for minimum component costs has increased at a rate of roughly a factor of two per year ... Certainly over the short term this rate can be expected to continue, if not to increase."

Moore was initially noting the number of transistors that can be placed on an integrated circuit at a relatively constant minimal cost. Because that measure has proven so representative of the progress of our technological manufacturing abilities, "Moore's Law" has become a cornerstone in discussions of pricing, capacity and speed of almost anything in the computer realm. You've probably heard the law used generically to refer to the constant improvements in technology: In two years, you can purchase twice as much capacity, speed, bandwidth or any other easily-measureable and relevant technology metric for the price you would pay today and for the current levels of production.

Think back to your first computer. How much storage capacity did it have? You were excited to be counting in bytes and kilobytes ... "Look at all this space!" A few years later, you heard about people at NASA using "gigabytes" of space, and you were dumbfounded. Fastforward a few more years, and you wonder how long your 32GB flash drive will last before you need to upgrade the capacity.

32GB Thumb Drive

As manufacturers have found ways to build bigger and faster drives, users have found ways to fill them up. As a result of this behavior, we generally go from "being able to use" a certain capacity to "needing to use" that capacity. From a hosting provider perspective, we've seen the same trend from our customers ... We'll introduce new high-capacity hard drives, and within weeks, we're getting calls about when we can double it. That's why we're always on the lookout for opportunities to incorporate product offerings that meet and (at least temporarily) exceed our customers' needs.

Today, we announced Quantastor Storage Servers, dedicated mass storage appliances with exceptional cost-effectiveness, control and scalability. Built on SoftLayer Mass Storage dedicated servers with the OS NEXUS QuantaStor Storage Appliance OS, the solution supports up to 48TB of data with the perfect combination of performance economics, scalability and manageability. To give you a frame of reference, this is 48TB worth of hard drives:


If you've been looking for a fantastic, high-capacity storage solution, you should give our QuantaStor offering a spin. The SAN (iSCSI) + NAS (NFS) storage system delivers advanced storage features including, thin-provisioning, and remote-replication. These capabilities make it ideally suited for a broad set of applications including VM application deployments, virtual desktops, as well as web and application servers. From what I've seen, it's at the top of the game right now, and it looks like it's a perfect option for long-term reliability and scalability.


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