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Deployment Guide for Blackboard and BigIP LTM?
Sigh... looks like Nick's document is now password protected? I know it's probably outdated, but still, would be nice to see for reference.
I just recently opened a ticket with Blackboard asking about Firefox 27 opening thousands of connections suddenly and since our homepage with Community creates a session for each "user" and these (presumably prefetch) connections don't store cookies, each connection gets its own session, killing our database performance if it lasts more than 10-20 minutes.
Blackboard sent me their NetScaler scripts used in Managed Hosting. I don't know if anyone at DevCentral would be able to look at those and "translate" them to F5 iRules, but they seem to be tried-and-true since managed hosting currently hosts about 60% of Blackboard customers.
Here's then information in the ticket:
[---- begin ticket response ----
For the, Limit Selector- "Each selectlet is a non-compound advanced expression, and is a "AND" relationship with others". For the "Limit Identifier, 'the threshold is set to a value of "2" to allow double click on a link. Default value for time slice is 1000ms(1s), it is enough for a normal browse operation. Means at most click a URL twice within one second.'
These are example URIs being excluded:
- /
- /bbcswebdav/pid-2578707-dt-content-rid-6462928_1/xid-6462928_1
- /webapps/login?new_loc=%2Fmodules%2F_142_1%2Fearh.jpg
- /webapps/login/
- /bbcswebdav/pid-394082-dt-content-rid-1439038_1/courses/10046.201305.XLIST/section6_3%20Filled.pdf
- /webapps/blackboard/content/FirstFrame.png
- /webapps/vtbe-tinymce/tiny_mce/plugins/spellchecker/css/content.css
- /webapps/sen-coursesplus-bb_bb60//images/empty.gif
- /webapps/sen-coursesplus-bb_bb60//images/announcement.png
- /apple-touch-icon-precomposed.png
- /sessions/5/1/8/4/6/9/3/session/gradebook_20130510910.201305_Assignment20_5_2013-06-15-08-20-10.zip
- /@@/CFAA8BD48A1E2FD9DD2E9C1DF26412C5/courses/1/MHRC433-A335_2137_DD/db/_23966706_1/MHRC%202.2.mov
Some of these are standard others not, of course those that are non-standard had to be identified through analysis.
---- end ticket response ----]
If anyone knows how to translate NetScaler scripting to F5, I'd be happy to send the actual script as well.
Dan
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