data replication

Migrating Data With ZFS Send and Receive

August 18, 2016 By Stephen 10 Comments

I like ZFS Send and Receive, but I’m not totally sold on it. I’ve used rsync for decades, so I’m not giving it up anytime soon. Even so, I can see the value of ZFS Send and Receive for local migration and data management tasks as well as the backup and replication tasks that are typically talked about.

Live DR Replicas On-Demand

June 3, 2013 By Stephen Leave a Comment

Ideas in IT come in waves, and recently I’ve been hearing about a great capability: On-demand live replicas of production virtual machines. Want to test your DR environment? Spin up a live sandbox in the cloud or at a service provider using VMware ESX. And if there’s a real disaster, you can always run there for real!

Ranting and Raving About the 2018 iPad Pro

I remain enthusiastic about the iPad Pro, despite getting a scratched screen and my concerns about durability. It’s a worthy successor to the original and offers enough improvements that I’d recommend the upgrade for just about anyone who uses their iPad for serious work. It’s still not yet a laptop replacement, but this is due more to a lack of desktop-class software for iOS than anything in Apple’s control.

Go Get a ProtonMail Account and Protect Your Online Life!

It’s an easy decision: Get a free ProtonMail account and use that as your verification address for important financial and social media accounts. Keep using whatever email account you like for regular communication, but don’t mix security and communication!

Download My Free E-Book, “Essential Enterprise Storage Concepts”!

April 4, 2017

I’ve got a lot to say about storage, as you might have noticed from reading my blog. So I finally sat down and wrote a book on enterprise storage. Now you can download the e-book for free, thanks to support from my friends at SolarWinds!

My Visit to Bletchley Park

August 3, 2012

Bletchley Park is much more than a museum. For those interested in the history of computing, like me, or World War II buffs, it’s a must-see. The reconstructed Bombe and Colossus computer are truly breathtaking, and I find myself drawn to the stories of codebreaking that took place here. I highly recommend a visit!

GPS Time Rollover Failures Keep Happening (But They’re Almost Done)

April 6, 2019

This is week “1111111111” in the GPS system. Tomorrow morning it will roll over to week “0000000000”. How well will various systems handle this change? Not well, judging by what we’ve seen so far!

MacBook Users: Encrypt Your Drive with OS X FileVault! It’s Easy and Free!

December 20, 2012

Once you encrypt your MacBook’s drive with FileVault 2, you’ll never even know it’s there. But if you ever lose your machine, you can rest easy knowing that your data is safe. Considering how well this solution performs and that it is included free of charge, there is no reason not to use it!

From Kipling’s Dirigibles to the Jet Age

May 13, 2012

I don’t get much chance to read for pleasure, but two things I’ve been reading recently spurred my imagination. After reliving the advent of modern transportation in the solid non-fiction Jet Age by Sam Howe Verhovek, I stumbled upon two pieces of speculative fiction from an unlikely source that predated everything presented there.

Not All 802.11n Networks Are Alike

July 2, 2011

Buyers of 802.11n wireless network equipment should not assume they will see a great benefit right out of the box. Most will have to enable by hand a high-performance configuration including wide channels and 5 GHz operation. And some client devices may never reach the levels of performance expected by consumers due to hardware limitations.

Microsoft’s Big Chance to Change

August 23, 2013

It takes a truly-remarkable leader to be willing to kill his old golden geese to make room for a new one; so far, only Apple and Amazon seem willing to forgo continuity in the name of profitable destruction. But new corporate leadership at Microsoft might un-stick the company and awaken the once-innovative Redmond powerhouse. The retirement of Steve Ballmer is welcome news.

Scaling Storage In Conventional Arrays

November 19, 2013

It is amazing that something as simple-sounding as making an array get bigger can be so complex, yet scaling storage is notoriously difficult. Our storage protocols just werenâ€™t designed with scaling in mind, and they lack the flexibility needed to dynamically address multiple nodes. So my hat is off to these companies and others who have come up with clever ways to maintain compatibility while scaling out beyond the bounds of a single storage array.