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Read the original article at Crisis Management in the Crosshairs – Sandy
Crisis Management During Sandy
The news this past week has brought endless images of devastation. All metropolitan region, the damage is apparent.
More than once in conversation I’ve commented “That’s similar to what I do.” The response is often one of confusion. So I go on to clarify. Web operations is every bit about disaster recovery and crisis management in the datacenter. If you saw Con Edison down in the trenches you might not know how that power gets to your building, or what all those
[Read more...]Read the original article at Real Disaster Recovery Lessons from Sandy
Also find Sean Hull’s ramblings on twitter @hullsean. Having just spent the last 24 hours in lower manhattan, while Hurricane Sandy rolled through, it’s offered some first hand lessons on disaster recovery. Watching the city and state officials, Con Edison, first responders and hospitals deal with the disaster brings some salient insights. 1. What are [...]
For more articles like these go to Sean Hull's Scalable Startups
Related posts:As part of a recent engagement, I described the relative products to manage a MySQL pair (i.e. an Active/Passive MySQL masters configuration). This included the steps to undertake a controlled failover for supporting software maintenance using manual procedures. The upcoming Effective MySQL: Replication Techniques in Depth book details each step and all conditions to review over a dozen pages. While the steps are straightforward and generally well known, scripting this for your environment takes a certain amount of work to ensure your information is correct, and application connectivity loss is kept to a minimum.
In Continuent Tungsten (which I have just been reviewing these past few weeks), I achieved the same result with a single command.
$ echo "switch" |[Read more...]
Read the original article at A History lesson for Cloud Detractors
We've all seen cloud computing discussed ad nauseam on blogs, on Twitter, Quora, Stack Exchange, your mom’s Facebook page... you get the idea. The tech bloggers and performance experts often pipe in with their graphs and statistics showing clearly that dollar-for-dollar, cloud hosted virtual servers can’t compete with physical servers in performance, so why is everyone pushing them? It's just foolhardy, they say.
On the other end, management and their bean counters would
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Read the original article at The Mythical MySQL DBA
I’ve been getting more than my fair share of calls from recruiters of late. Even in this depressed economic climate where jobs are rarer than a cab at rush-hour, it’s heartening to know that tech engineers are in great demand. And it’s even more heartening to think that demand for MySQL DBAs has never been better.
My reckoning was confirmed by a Bloomberg news report about stalwart retailers suffering from a dearth of talented engineers. Bloomberg cited Target’s outage-prone e-commerce site as a symptom of, among other things the market’s shortage. One of the challenges old-timers like Target face is having to compete with Silicon Valley startups
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Database Administration and Management is as important under MySQL as it is under other enterprise database platforms such as Oracle or SQL Server. Be proactive with your database operations, and avoid outage or loss of your most crucial data.
1. This page or area of the website is very slow, why?
There are a lot of components that make up modern internet websites, and a lot of places to get stuck in the mud. Website performance starts with the browser, what caching it is doing, their bandwidth to your server, what the webserver is doing (caching or not and how), if the webserver has sufficient memory, and then what the application code is doing and lastly how it is interacting with the backend database.
With all this complexity, it's no wonder so many sites struggle. Typically these types of analysis start with some load testing, to stress test your setup, so you can watch for leaks. Then
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Amazon EC2 and cloud computing offer great promise for startups to ramp up their online presence quickly. Navigate those challenges with an strong partner. We bring 20 years experience to the table with each new client.
1. Backup outside of the Cloud
Some of the high profile companies affected by Amazon's April 2011 outage could have recovered had they kept a backup of their entire site outside of the cloud. With any hosting provider, managed traditional data center or cloud provider, alternate backups are always a good idea. A MySQL logical backup and/or incremental backup can be copied regularly offsite or to an alternate cloud provider. That's real insurance!
2. Use alternate regions and availability zones
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Last week, I was at the NetApp office in North Sydney for the presentation on NetApp SnapManager for Oracle. It was good opportunity to learn more about NetApp snapshots while working on a project for one of our clients in Sydney. It was an especially interesting topic as I have some experience using Veritas Checkpoints (see my presentation on test systems refreshes), and it was interesting to see what’s different and new in the NetApp implementation. But I digress.
I learned that NetApp can provide access to the same LUNs via either Fiber-Channel (FC) or iSCSI. And this is when the interesting argument surfaced. Apparently, some companies aim to
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