addressalign-toparrow-leftarrow-rightbackbellblockcalendarcameraccwcheckchevron-downchevron-leftchevron-rightchevron-small-downchevron-small-leftchevron-small-rightchevron-small-upchevron-upcircle-with-checkcircle-with-crosscircle-with-pluscontroller-playcrossdots-three-verticaleditemptyheartexporteye-with-lineeyefacebookfolderfullheartglobegmailgooglegroupshelp-with-circleimageimagesinstagramFill 1linklocation-pinm-swarmSearchmailmessagesminusmoremuplabelShape 3 + Rectangle 1ShapeoutlookpersonJoin Group on CardStartprice-ribbonprintShapeShapeShapeShapeImported LayersImported LayersImported Layersshieldstartickettrashtriangle-downtriangle-uptwitteruserwarningyahoo

eHarmony's Rick Warren "Letters from the Trenches"

Rick Warren presents "Letters from the Trenches: Lessons Learned Taking MongoDB to Production"

Rick Warren will present his talk October 17th, since he was unable to present August 28th, due to an illness. 


7:00PM Meet, Greet & Eat

7:30PM Main Presentation

Followed by Q&A


Over the last year, eHarmony has migrated one of our most critical applications from Hibernate to MongoDB.  We tested the app extensively for functionality and performance, and we learned a lot along the way.  In this talk, I'll go through specific challenges we faced and share some of the gotchas and best practices we developed and discovered.


Rick Warren is a senior engineer at eHarmony, where he works on back-end services to help customers build great relationships.  He has a background in high-performance data distribution, at the application tier and at the data tier.


eHarmony is the first service within the online dating industry to use a scientific approach to matching highly compatible singles.  eHarmony's matching is based on using its 29 DIMENSIONS® model to match couples based on features of compatibility found in thousands of successful relationships.

eHarmony is committed to helping singles find love every day, and with over 20 million registered online users, we are confident in our ability to do so.  The eHarmony Compatibility Matching System matches single women and men based on 29 Dimensions® of compatibility for lasting and fulfilling relationships.

Traditional Internet dating can be challenging for those singles looking for love that lasts.  But eHarmony is not a traditional dating site.  Of all the single men or women you may meet online, very few will be compatible with you specifically, and it can be difficult to determine the level of compatibility with you specifically, and it can be difficult to determine the level of compatibility of a potential partner through methods of conventional dating services-- browsing classified ads, online personals, or viewing profile photos.  Our compatibility Matching System does the work for you by narrowing the field from thousnds of single prospects to match you with a select group of compatible matches with whom you can build quality relationships.

You can find eHarmony at:




Peak Hosting designs, builds, maintains, and supports custom dedicated and hybrid hosted computing platforms. This technical operations service combines modern high-performance computing hardware with the operational experience of veteran engineers and customized customer attention more typically associated with consulting companies. Instead of running databases, servers, and data centers, you can focus on writing code!  Let Peak handle the ongoing distractions from technical operations and logistics.

Diamond Web Services, a web development boutique in Venice, CA, sponsors the LA Tech Community through TechTalksLA. DWS brings the LA Tech Community closer together one meetup at a time.


MongoDB is connecting us up with food and beverages so don't listen to a great talk on an empty stomach :)


O'Reilly has set us up with some cool books!

Learning from First Responders: When Your Systems Have to Work by Dylan Richard

The Human Side of Postmortems by Dave Zwieback

Scaling MongoDB

by Kristina Chodorow

MongoDB: The Definitive Guide by Kristina Chodorow & Michael Dirolf


Factual is a location platform that enables personalized and contextually relevant mobile experiences by enriching mobile location signals with definitive global data. Factual’s real-time data stack builds and maintains data on a global scale, with Factual's core Global Places data covering over 65 million local businesses and points of interest in 50 countries. Factual’s platform also informs location with contextual demographic and commercial data, and offers cleaning and mapping services for business listings and points of interest.


Television Four, located in the heart of Hollywood, is a broadband television programming and production company. TV4's mission is to feed your passion with great storytelling delivered to any screen, anywhere. TV4 are filming tonight's meetup.


Factual is in the Gateway West building, next to the Westfield Century City mall on the east side. It's the only building with big red "Westfield" signs on top.

The best place for attendees to park is at the Westfield Century City Mall.  Please note that they no longer offer free parking for the first 3 hours.  Parking rates are as follows:

•0 to 3 hours: $1.00 per hour

•3 to 5 hours: $1.00 every 15 minutes

•5 hours or more: $24.00

•Daily Maximum: $24.00


If you need a ride or can offer a ride, please post a comment underneath this meetup.





LAMongoDB Facebook

Join or login to comment.

  • Dan

    Great presentation, very informative and well organized, good Q & A session as well. Thank you to everyone that organized and sponsored this meetup!

    1 · October 17, 2013

    • Frank h.

      Did anyone happen to record it? I missed out tonight.

      1 · October 18, 2013

    • Joe D.

      Yes, See caroline's link above

      January 14, 2014

  • Caroline R.

    Here is the video for the talk:


    1 · January 14, 2014

  • Shannon C.

    Field names two characters long---who woulda thought?? Really interesting talk, Rick. Thank you and thanks to Joe and Caroline for organizing.

    1 · October 18, 2013

  • Billy M.

    Great to hear how both RDBS and mongo we're utilized to meet different needs. Lots of great tips on planning for scale. Thanks for the great meetup

    1 · October 17, 2013

  • A former member
    A former member

    I'm driving from Burbank if anyone needs a ride.

    October 16, 2013

    • Rui

      Hi Steven, Can I please get a ride with you if there is space? Thanks. Can you please tell me where and when to meet? I'll be coming from Pasadena. Thanks!

      October 16, 2013

    • A former member
      A former member

      Hey there Ruihua, I sent you an e-mail with more details.

      October 17, 2013

  • RobPecor

    Any hints to any of the topics? Replication issues, Sharding, etc.?

    1 · September 11, 2013

Our Sponsors

  • MongoDB

    Thanks to MongoDB for the refreshments and support!!

  • Factual

    Factual offers event space for MongoDB User Groups

  • Diamond

    From product concept to reality using MongoDB

  • LAX Coastal Chamber of Commerce

    This is an initiative by the Chamber to marry Local Business to Tech!

  • Television Four

    TV4 is filming all our talks & pre-talk interviews with the speaker.

  • LAX CoWorking

    A coworking space w/ modern biz owner in mind. As low as $20/day.

People in this
Meetup are also in:

Sign up

Meetup members, Log in

By clicking "Sign up" or "Sign up using Facebook", you confirm that you accept our Terms of Service & Privacy Policy