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November 4, 2001 On Wednesday, Verizon received an errant disconnect order from the ISP,
Intermedia. Luckily, the facilities were not reallocated. Verizon got
the line back up around 10am on Saturday, about 48 hours after the disconnect. Downtime extended from Thursday 10am to Saturday 10am.
On Saturday morning, a new primary MX record was added to the backup
DNS for vees.net and
epistolary.org for a machine on a remote network to accept and deliver
all mail arriving for either of those domains to a temporary file.
Shortly after that, the T1 connectivity returned and mail was redirected back
to the main servers.
This is in line with the disaster recovery plan
which switches the mail over after 48 hours and "Temporarily Down" web pages
(with an appropriate robots.txt file to prevent poisioning of the search
engines) set up at a remote location answering for all epistolary.org and
vees.net hosts.
No mail was lost, and all mail was delivered successfully within the standard
5 day time frame. Mail from UMBC was delayed until 72 hours later due to an MTA size issue. This
issue was also found and repaired.
In the future, there will be a secondary server with a mirrored config
available on a seperate network to keep everything going.
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Unless noted, all content on epistolary.org is © Copyright 1999-2008 to Rob Carlson with all rights reserved. All information is verified when possible, cited as appropriate and applied in the real world at your own risk.
Send all feedback to rob@vees.net.
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