Comments for exortech.com

Comment on Weekly Release Blog #18 – Long-running database migrations by exortech

exortech — Sat, 15 Jan 2011 18:20:06 +0000

Good suggestion. We definitely run screen these days when performing these types of operations.

Comment on Weekly Release Blog #18 – Long-running database migrations by Amir

Amir — Sat, 15 Jan 2011 10:24:11 +0000

This is an old post, but I’ll comment anyway:
Always use GNU screen when doing work on remote servers, and timing-out SSH connections will not interrupt your processes.

Comment on Weekly Release Blog #11 – Zero-Downtime Database Deployment by Benjamin Starks

Benjamin Starks — Tue, 09 Nov 2010 18:39:06 +0000

Mutating a schema change is the major problem we are also facing. With 20+ web-server frontends all hitting the database we can’t just bring all of them down to change the logic structure.

We looked at Liquibase for a while, but even though it builds automatically scripts that can apply a schema change, the time it takes to do it for our 8GB+ db locks up the application. We are giving ChronicDB a go next.

Comment on Weekly Release Blog #11 – Zero-Downtime Database Deployment by Pawan

Pawan — Fri, 01 Oct 2010 12:28:02 +0000

if stage servers DB servers are there stop data flow from stage to Primary DB servers, you can take one more mirror server, do deployment on it and do testing, once successfull, failover the server and make principal down, and start data flow from stage to Primary server. This will not affect existing users. Hope it would help

Comment on Weekly Release Blog #11 – Zero-Downtime Database Deployment by Chris

Chris — Sun, 21 Feb 2010 00:16:00 +0000

You may want to have a look at a product called ChronicDB. It offers zero-downtime database deployment in a way that solves the chicken-or-the-egg problem.

Comment on Weekly Release Blog #11 – Zero-Downtime Database Deployment by Simon Harris

Simon Harris — Wed, 20 Jan 2010 04:19:09 +0000

How do you handle views (if at all)?

Have you had to handle column type changes?

Comment on Weekly Release Blog #11 – Zero-Downtime Database Deployment by Scott Rich

Scott Rich — Fri, 15 Jan 2010 17:48:23 +0000

Great article, thanks. I hope this isn’t a naive question, but this scheme doesn’t seem to allow for any form of “mutating” schema change, changing the logical or physical type of a column, for example. Is the assumption that this has to be done by moving the new app version to a new column and deprecating the old?

Comment on Weekly Release Blog #11 – Zero-Downtime Database Deployment by Zero Downtime Continuous Deployment « Lean Builds

Zero Downtime Continuous Deployment « Lean Builds — Tue, 01 Dec 2009 00:04:31 +0000

[...] since you’ve potentially got lots of dependency problems; luckily, the Exortech blog recently addressed this issue as [...]

Comment on Weekly Release Blog #11 – Zero-Downtime Database Deployment by exortech.com » Blog Archive » Back from Bangalore (and Hyderabad and Mumbai)

Thu, 17 Sep 2009 05:56:43 +0000

[...] presentation also stimulated some good side chatter on twitter. In general, zero-downtime database deployment, continuous monitoring and WAGMI seemed to be popular topics. Thanks to everyone who made it out [...]

Comment on Speaking at DevTeach Vancouver by exortech.com » Blog Archive » Speaking in India

exortech.com » Blog Archive » Speaking in India — Mon, 07 Sep 2009 14:19:37 +0000

[...] This week, I’m off to India to speak at the CodeChef conference. The conference consists of three talks over three days in three different Indian cities: Mumbai, Hyderabad and Bangalore. I will be speaking alongside Lisa Crispin and Bhavin Turakhia. My talk (unsurprisingly) will be on weekly releases and will be quite similar to the presentation that I gave at Devteach. [...]