Home Accessibility Courses Diary The Mouth Facebook Resources Site Map About Us Contact
A year ago today, a server upgrade and a new Perl example

"Weren't you on a boat somewhere last year when we spoke?" asked Atiqur when I called him yesterday to talk about our server upgrade / annual contract. Indeed I was, and I was impressed not only by his memory (he assures me it's not just his computer system of notes!) but by the speed of upgrade; our server was upgraded in the early hours of this morning and our service was down for just nine minutes.

Our daily log file is around 20 Mbytes ... how did I find out how long we were off air? A quick little Perl program run against that file:

  while (<>) {
    ($h,$m,$s) = m!:(\d+):(\d+):(\d+)!;
    $sid = $h * 3600 + $m * 60 + $s;
    if ($osid and $sid - $osid > 500) {
      print "$oh $om $os -> $h $m $s\n";
      }
    $osid = $sid;
    $oh = $h; $om = $m; $os = $s;
  }


Run against the log file, this reported:

  wizard:jul12 graham$ perl gap_report ac_20120709
  00 39 42 -> 00 48 42
  wizard:jul12 graham$


So that's a thorough recommendation for UK2. And if you want to learn about Perl, and who you can extract information to quickly from such a massive amount of data, take a look at our Perl courses - fully described on that server that was just upgrades. All our samples and support materials are there too - after the course you'll find you have knowledgable access to hundreds of indexed source code examples and articles. See (for example) the resources on Perl Hashes [here].

Illustration - on this day, last year!

(written 2012-07-10, updated 2012-07-14)

 
Back to
Fancy a weekend away? Try Well House Manor in Melksham, Wiltshire
Previous and next
or
Horse's mouth home
Forward to
What a difference a year makes
Some other Articles
Scenes from commuting by train
A Walk on the South Bank
What a difference a year makes
A year ago today, a server upgrade and a new Perl example
Fancy a weekend away? Try Well House Manor in Melksham, Wiltshire
Ruby Documentation through rdoc
When you should use Object Orientation even in a short program - Python example
zip in Python
Backquote, backtic, str and repr in Python - conversion object to string
Like a bathroom company with no plumbers
4254 posts, page by page
Link to page ... 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86 at 50 posts per page


This is a page archived from The Horse's Mouth at http://www.wellho.net/horse/ - the diary and writings of Graham Ellis. Every attempt was made to provide current information at the time the page was written, but things do move forward in our business - new software releases, price changes, new techniques. Please check back via our main site for current courses, prices, versions, etc - any mention of a price in "The Horse's Mouth" cannot be taken as an offer to supply at that price.

Link to Ezine home page (for reading).
Link to Blogging home page (to add comments).

You can Add a comment or ranking to this page

© WELL HOUSE CONSULTANTS LTD., 2014: Well House Manor • 48 Spa Road • Melksham, Wiltshire • United Kingdom • SN12 7NY
PH: 01144 1225 708225 • FAX: 01144 1225 899360 • EMAIL: info@wellho.net • WEB: http://www.wellho.net • SKYPE: wellho

PAGE: http://www.wellho.net/mouth/3801_A-y ... ample.html • PAGE BUILT: Sun Mar 30 15:20:58 2014 • BUILD SYSTEM: WomanWithCat