Jetpack Related Posts for Power Users

The related posts module in Jetpack looks simple at first glance however underneath it’s powered by Elasticsearch, an advanced natural language search engine. Come as we peel back the covers to explain how Jetpack uses Elasticsearch to determine what’s related and more importantly how to customize it to take full advantage of Elasticsearch’s textual analytics abilities.

Transcript

1. Jetpack Related Posts for Power Users
   WordCamp Maine (August 2014)
   

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2. The 13 filters you won't believe is in related posts
   WordCamp Maine (August 2014)
   

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3. Xiao Yu
   Code Wrangler — Automattic
   
   @HypertextRanch
   
   me@xyu.io
   
   xyu.io
   
   xyu
   
   
   
   
   
   

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4. Related Posts
   

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5. View Slide

6. View Slide

7. View Slide

8. View Slide

9. Because finding related content is a hard
   problem to solve.
   

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10. View Slide

11. WordPress on NGINX + HHVM with Heroku Buildpacks WordPress on NGINX + HHVM It’s been a
    year since I last made any major changes to my WordPress on Heroku build and in tech years
    that’s a lifetime. Since then Heroku has released a new PHP buildpack with nginx and HHVM built
    in. Much progress have also been made both HHVM and WordPress to make both compatible
    with each other. So it seems like now is as good a time as any to update the stack this site is
    running on. So without further ado I like to introduce: Heroku WP — A template for HHVM
    powered WordPress served by nginx. The Goal There are numerous other templates out there for
    running WordPress on Heroku and my main goals for this templates are: It should be simple —
    use the default buildpack provided by Heroku so there’s no other 3rd party dependency to
    implicitly trust or to maintain. It should be fast — use the latest technologies available to squeeze
    every last ounce of performance out of each Heroku Dyno. It should be secure — security is not
    an add-on, admin pages should be secure by default and database connections needs to be
    encrypted. It should scale — just because we can serve millions of page hits a day off a single
    Heroku Dyno does not mean we’ll stop there. The template should be made with cloud
    architecture in mind so that the number of Dynos can scale up and down without breaking. The
    Stack Standing on the shoulder of giants I was able to use the latest Heroku buildpack and get
    WordPress running on: NGINX — An event driven web server that was engineered for the modern
    day to replace Apache. This high performance web server is preferred by more top 1,000 sites
    then any other and it’s what’s used by the largest WordPress install out there, WordPress.com.
    HHVM — HipHop Virtual Machine, a JIT (just in time) compiler developed by Facebook to run
    PHP scripts which when tested with WordPress showed up to a 2x improvement. I have yet to
    run any statical analysis on performance however antidotally it feels a lot faster navigating WP
    admin and page generation times looks much better. I’m looking forward to running more tests
    and performance tuning this build in the coming weeks. Update: While still not a head-to-head
    test looking at the response times as reported by StatusCake for this site running on Heroku-WP
    and a mirror of this site that is running on the old Heroku LAMP stack with no load other then
    StatusCake pings shows a dramatic improvement:
    

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12. SELECT COUNT(*)

    FROM wp_posts

    WHERE post_content LIKE "%WordPress%"
    SELECT COUNT(*)

    FROM wp_posts

    WHERE post_content LIKE "%on%"
    SELECT COUNT(*)

    FROM wp_posts

    WHERE post_content LIKE "%NGINX%"
    …
    SELECT COUNT(*)

    FROM wp_posts

    WHERE post_content LIKE "%improvement%"
    

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13. NOPE
    NOPE
    

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14. WordPress on NGINX + HHVM with Heroku Buildpacks WordPress on NGINX + HHVM It’s been a
    year since I last made any major changes to my WordPress on Heroku build and in tech years
    that’s a lifetime. Since then Heroku has released a new PHP buildpack with nginx and HHVM built
    in. Much progress have also been made both HHVM and WordPress to make both compatible
    with each other. So it seems like now is as good a time as any to update the stack this site is
    running on. So without further ado I like to introduce: Heroku WP — A template for HHVM
    powered WordPress served by nginx. The Goal There are numerous other templates out there for
    running WordPress on Heroku and my main goals for this templates are: It should be simple —
    use the default buildpack provided by Heroku so there’s no other 3rd party dependency to
    implicitly trust or to maintain. It should be fast — use the latest technologies available to squeeze
    every last ounce of performance out of each Heroku Dyno. It should be secure — security is not
    an add-on, admin pages should be secure by default and database connections needs to be
    encrypted. It should scale — just because we can serve millions of page hits a day off a single
    Heroku Dyno does not mean we’ll stop there. The template should be made with cloud
    architecture in mind so that the number of Dynos can scale up and down without breaking. The
    Stack Standing on the shoulder of giants I was able to use the latest Heroku buildpack and get
    WordPress running on: NGINX — An event driven web server that was engineered for the modern
    day to replace Apache. This high performance web server is preferred by more top 1,000 sites
    then any other and it’s what’s used by the largest WordPress install out there, WordPress.com.
    HHVM — HipHop Virtual Machine, a JIT (just in time) compiler developed by Facebook to run
    PHP scripts which when tested with WordPress showed up to a 2x improvement. I have yet to
    run any statical analysis on performance however antidotally it feels a lot faster navigating WP
    admin and page generation times looks much better. I’m looking forward to running more tests
    and performance tuning this build in the coming weeks. Update: While still not a head-to-head
    test looking at the response times as reported by StatusCake for this site running on Heroku-WP
    and a mirror of this site that is running on the old Heroku LAMP stack with no load other then
    StatusCake pings shows a dramatic improvement:
    

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15. WordPress on NGINX + HHVM with Heroku Buildpacks WordPress on NGINX + HHVM It’s been a
    year since I last made any major changes to my WordPress on Heroku build and in tech years
    that’s a lifetime. Since then Heroku has released a new PHP buildpack with nginx and HHVM built
    in. Much progress have also been made both HHVM and WordPress to make both compatible
    with each other. So it seems like now is as good a time as any to update the stack this site is
    running on. So without further ado I like to introduce: Heroku WP — A template for HHVM
    powered WordPress served by nginx. The Goal There are numerous other templates out there for
    running WordPress on Heroku and my main goals for this templates are: It should be simple —
    use the default buildpack provided by Heroku so there’s no other 3rd party dependency to
    implicitly trust or to maintain. It should be fast — use the latest technologies available to squeeze
    every last ounce of performance out of each Heroku Dyno. It should be secure — security is not
    an add-on, admin pages should be secure by default and database connections needs to be
    encrypted. It should scale — just because we can serve millions of page hits a day off a single
    Heroku Dyno does not mean we’ll stop there. The template should be made with cloud
    architecture in mind so that the number of Dynos can scale up and down without breaking. The
    Stack Standing on the shoulder of giants I was able to use the latest Heroku buildpack and get
    WordPress running on: NGINX — An event driven web server that was engineered for the modern
    day to replace Apache. This high performance web server is preferred by more top 1,000 sites
    then any other and it’s what’s used by the largest WordPress install out there, WordPress.com.
    HHVM — HipHop Virtual Machine, a JIT (just in time) compiler developed by Facebook to run
    PHP scripts which when tested with WordPress showed up to a 2x improvement. I have yet to
    run any statical analysis on performance however antidotally it feels a lot faster navigating WP
    admin and page generation times looks much better. I’m looking forward to running more tests
    and performance tuning this build in the coming weeks. Update: While still not a head-to-head
    test looking at the response times as reported by StatusCake for this site running on Heroku-WP
    and a mirror of this site that is running on the old Heroku LAMP stack with no load other then
    StatusCake pings shows a dramatic improvement:
    

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16. SELECT *

    FROM wp_posts

    WHERE

    post_content LIKE "%WordPress%" OR

    post_content LIKE "%NGINX%" OR

    post_content LIKE "%HHVM%" OR

    post_content LIKE "%Heroku%" OR

    post_content LIKE "%performance%"

    

    

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17. SELECT *

    FROM wp_posts

    WHERE

    post_content LIKE "%WordPress%" OR

    post_content LIKE "%NGINX%" OR

    post_content LIKE "%HHVM%" OR

    post_content LIKE "%Heroku%" OR

    post_content LIKE "%performance%"

    ORDER BY

    !?
    

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18. View Slide

19. –Some Plugin Author
    “Let’s just use tags and categories.”
    

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20. –Some SEO Consultant’s Dream
    “Everyone tags & categorize everything
    perfectly.”
    

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21. NOPE
    NOPE
    

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22. Ok, it’s a hard problem to solve.
    

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23. WE CAN FIX IT
    WE CAN FIX IT
    WITH SCIENCE!
    WITH SCIENCE!
    

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24. !
    elasticsearch
    

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25. Understands
    Language
    

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26. !
    Analyzing Text
    

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27. Elasticsearch Analyzer Chain
    Character Filters
    Raw Text
    Tokenizer
    Token Filters
    Terms
    

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28. Elasticsearch Analyzer Chain
    Raw Text → Character Filters → Tokenizer → Token Filters → Terms
    “The über-quick brown fox

    jumps over the lazy dogs.”
    

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29. Elasticsearch Analyzer Chain
    Raw Text → Character Filters → Tokenizer → Token Filters → Terms
    

    The über-quick brown fox

    jumps over the lazy dogs.

    
    

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30. Elasticsearch Analyzer Chain
    Raw Text → Character Filters → Tokenizer → Token Filters → Terms
    

    The über-quick brown fox

    jumps over the lazy dogs.

    
    

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31. Elasticsearch Analyzer Chain
    Raw Text → Character Filters → Tokenizer → Token Filters → Terms
    

    The über-quick brown fox

    jumps over the lazy dogs.

    

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32. Elasticsearch Analyzer Chain
    Raw Text → Character Filters → Tokenizer → Token Filters → Terms
    

    The über—quick brown fox 

    jumps over the lazy dogs.

    

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33. Elasticsearch Analyzer Chain
    Raw Text → Character Filters → Tokenizer → Token Filters → Terms
    

    The über quick brown fox

    jumps over the lazy dogs

    

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34. Elasticsearch Analyzer Chain
    Raw Text → Character Filters → Tokenizer → Token Filters → Terms
    

    The

    quick

    fox

    over

    lazy

    

    über

    brown

    jumps

    the

    dogs

    

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35. Elasticsearch Analyzer Chain
    Raw Text → Character Filters → Tokenizer → Token Filters → Terms
    

    The

    quick

    fox

    over

    lazy

    

    über

    brown

    jumps

    the

    dogs

    

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36. Elasticsearch Analyzer Chain
    Raw Text → Character Filters → Tokenizer → Token Filters → Terms
    

    the

    quick

    fox

    over

    lazy

    

    über

    brown

    jumps

    the

    dogs

    

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37. Elasticsearch Analyzer Chain
    Raw Text → Character Filters → Tokenizer → Token Filters → Terms
    

    the

    quick

    fox

    over

    lazy

    

    über

    brown

    jumps

    the

    dogs

    

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38. Elasticsearch Analyzer Chain
    Raw Text → Character Filters → Tokenizer → Token Filters → Terms
    

    the

    quick

    fox

    over

    lazy

    

    uber

    brown

    jumps

    the

    dogs

    

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39. Elasticsearch Analyzer Chain
    Raw Text → Character Filters → Tokenizer → Token Filters → Terms
    

    the

    quick

    fox

    over

    lazy

    

    uber

    brown

    jumps

    the

    dogs

    

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40. Elasticsearch Analyzer Chain
    Raw Text → Character Filters → Tokenizer → Token Filters → Terms
    

    the

    quick

    fox

    over

    lazy

    

    uber

    brown

    jump

    the

    dog

    

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41. Elasticsearch Analyzer Chain
    Raw Text → Character Filters → Tokenizer → Token Filters → Terms
    

    the

    quick

    fox

    over

    lazy

    

    uber

    brown

    jump

    the

    dog

    

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42. Elasticsearch Analyzer Chain
    Raw Text → Character Filters → Tokenizer → Token Filters → Terms
    

    

    quick

    fox

    over

    lazy

    

    uber

    brown

    jump

    

    dog

    

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43. Elasticsearch Analyzer Chain
    Raw Text → Character Filters → Tokenizer → Token Filters → Terms
    Terms Doc IDs
    brown 1
    dog 1
    fox 1
    jump 1
    lazy 1
    …
    over 1
    quick 1
    uber 1
    

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44. Elasticsearch Analyzer Chain
    Raw Text → Character Filters → Tokenizer → Token Filters → Terms
    Terms Doc IDs
    brown 1, 3, 6, …
    dog 1, 2, 12…
    fox 1, 5, 7, …
    jump 1, 6, …
    lazy 1, 7, …
    … 3, 6, 7, …
    over 1, 3, 5, 6, …
    quick 1, 4, …
    uber 1, …
    

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45. Understands
    Language
    Through Analyzers
    

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46. Understands
    Relevancy
    

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47. Relevancy Score?
    TF-IDF
    

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48. Relevancy Score?
    Term Frequency

    ×

    Inverse Document Frequency
    

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49. Relevancy Score?
    Term Frequency

    ×

    Inverse Document Frequency
    

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50. Relevancy Score?
    Term Frequency

    ×

    Inverse Document Frequency
    

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51. Relevancy Score?
    Term Frequency

    ×

    Inverse Document Frequency
    

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52. WordPress on NGINX + HHVM with Heroku Buildpacks WordPress on NGINX + HHVM It’s been a
    year since I last made any major changes to my WordPress on Heroku build and in tech years
    that’s a lifetime. Since then Heroku has released a new PHP buildpack with nginx and HHVM built
    in. Much progress have also been made both HHVM and WordPress to make both compatible
    with each other. So it seems like now is as good a time as any to update the stack this site is
    running on. So without further ado I like to introduce: Heroku WP — A template for HHVM
    powered WordPress served by nginx. The Goal There are numerous other templates out there for
    running WordPress on Heroku and my main goals for this templates are: It should be simple —
    use the default buildpack provided by Heroku so there’s no other 3rd party dependency to
    implicitly trust or to maintain. It should be fast — use the latest technologies available to squeeze
    every last ounce of performance out of each Heroku Dyno. It should be secure — security is not
    an add-on, admin pages should be secure by default and database connections needs to be
    encrypted. It should scale — just because we can serve millions of page hits a day off a single
    Heroku Dyno does not mean we’ll stop there. The template should be made with cloud
    architecture in mind so that the number of Dynos can scale up and down without breaking. The
    Stack Standing on the shoulder of giants I was able to use the latest Heroku buildpack and get
    WordPress running on: NGINX — An event driven web server that was engineered for the modern
    day to replace Apache. This high performance web server is preferred by more top 1,000 sites
    then any other and it’s what’s used by the largest WordPress install out there, WordPress.com.
    HHVM — HipHop Virtual Machine, a JIT (just in time) compiler developed by Facebook to run
    PHP scripts which when tested with WordPress showed up to a 2x improvement. I have yet to
    run any statical analysis on performance however antidotally it feels a lot faster navigating WP
    admin and page generation times looks much better. I’m looking forward to running more tests
    and performance tuning this build in the coming weeks. Update: While still not a head-to-head
    test looking at the response times as reported by StatusCake for this site running on Heroku-WP
    and a mirror of this site that is running on the old Heroku LAMP stack with no load other then
    StatusCake pings shows a dramatic improvement:
    

    View Slide

53. WordPress on NGINX + HHVM with Heroku Buildpacks WordPress on NGINX + HHVM It’s been a
    year since I last made any major changes to my WordPress on Heroku build and in tech years
    that’s a lifetime. Since then Heroku has released a new PHP buildpack with nginx and HHVM built
    in. Much progress have also been made both HHVM and WordPress to make both compatible
    with each other. So it seems like now is as good a time as any to update the stack this site is
    running on. So without further ado I like to introduce: Heroku WP — A template for HHVM
    powered WordPress served by nginx. The Goal There are numerous other templates out there for
    running WordPress on Heroku and my main goals for this templates are: It should be simple —
    use the default buildpack provided by Heroku so there’s no other 3rd party dependency to
    implicitly trust or to maintain. It should be fast — use the latest technologies available to squeeze
    every last ounce of performance out of each Heroku Dyno. It should be secure — security is not
    an add-on, admin pages should be secure by default and database connections needs to be
    encrypted. It should scale — just because we can serve millions of page hits a day off a single
    Heroku Dyno does not mean we’ll stop there. The template should be made with cloud
    architecture in mind so that the number of Dynos can scale up and down without breaking. The
    Stack Standing on the shoulder of giants I was able to use the latest Heroku buildpack and get
    WordPress running on: NGINX — An event driven web server that was engineered for the modern
    day to replace Apache. This high performance web server is preferred by more top 1,000 sites
    then any other and it’s what’s used by the largest WordPress install out there, WordPress.com.
    HHVM — HipHop Virtual Machine, a JIT (just in time) compiler developed by Facebook to run
    PHP scripts which when tested with WordPress showed up to a 2x improvement. I have yet to
    run any statical analysis on performance however antidotally it feels a lot faster navigating WP
    admin and page generation times looks much better. I’m looking forward to running more tests
    and performance tuning this build in the coming weeks. Update: While still not a head-to-head
    test looking at the response times as reported by StatusCake for this site running on Heroku-WP
    and a mirror of this site that is running on the old Heroku LAMP stack with no load other then
    StatusCake pings shows a dramatic improvement:
    

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54. View Slide

55. View Slide

56. 
    

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57. 
    
    

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58. View Slide

59. Related Posts
    

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60. View Slide

61. Related Posts for
    Power Users
    • Customize placement
    with the related posts

    shortcode
    • Change results or look
    and feel with various

    filters
    • Go completely wild
    with the related posts

    raw object
    IT'S OVER 9000!
    IT'S OVER 9000!
    

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62. [jetpack-related-posts]
    

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63. echo do_shortcode(

    '[jetpack-related-posts]'

    );

    ?>
    

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64. Related Posts for
    Power Users
    • Customize placement
    with the related posts

    shortcode
    • Change results or look
    and feel with various

    filters
    • Go completely wild
    with the related posts

    raw object
    IT'S OVER 9000!
    IT'S OVER 9000!
    

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65. Look & Feel Configs
    

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66. jetpack_relatedposts_filter_options
    

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67. jetpack_relatedposts_filter_headline
    

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68. jetpack_relatedposts_filter_thumbnail_size
    

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69. Fine Tune Matching Posts
    

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70. jetpack_relatedposts_filter_args
    array(

    'size' => 3,

    'post_type' => get_post_type(),

    'has_terms' => array(),

    'date_range' => array(),

    'exclude_post_ids' => array(),

    )
    

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71. jetpack_relatedposts_filter_args
    array(

    'size' => 3,

    'post_type' => get_post_type(),

    'has_terms' => array(),

    'date_range' => array(),

    'exclude_post_ids' => array(),

    )
    

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72. jetpack_relatedposts_filter_post_type
    jetpack_relatedposts_filter_args
    array(

    'size' => 3,

    'post_type' => get_post_type(),

    'has_terms' => array(),

    'date_range' => array(),

    'exclude_post_ids' => array(),

    )
    

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73. jetpack_relatedposts_filter_post_type
    jetpack_relatedposts_filter_args
    array(

    'size' => 3,

    'post_type' => array(

    'post',

    'awesome_sauce',

    ),

    'has_terms' => array(),

    'date_range' => array(),

    'exclude_post_ids' => array(),

    )
    

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74. jetpack_relatedposts_filter_has_terms
    jetpack_relatedposts_filter_args
    array(

    'size' => 3,

    'post_type' => get_post_type(),

    'has_terms' => array(),

    'date_range' => array(),

    'exclude_post_ids' => array(),

    )
    

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75. jetpack_relatedposts_filter_has_terms
    jetpack_relatedposts_filter_args
    array(

    'size' => 3,

    'post_type' => get_post_type(),

    'has_terms' => array(

    get_term_by( 'slug', 'devops', 'category' ),

    get_term_by( 'slug', 'hhvm', 'post_tag' ),

    ),

    'date_range' => array(),

    'exclude_post_ids' => array(),

    )
    

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76. jetpack_relatedposts_filter_date_range
    jetpack_relatedposts_filter_args
    array(

    'size' => 3,

    'post_type' => get_post_type(),

    'has_terms' => array(),

    'date_range' => array(),

    'exclude_post_ids' => array(),

    )
    

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77. jetpack_relatedposts_filter_date_range
    jetpack_relatedposts_filter_args
    array(

    'size' => 3,

    'post_type' => get_post_type(),

    'has_terms' => array(),

    'date_range' => array(

    'from' => strtotime( '-18 month' ),

    'to' => time(),

    ),

    'exclude_post_ids' => array(),

    )
    

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78. jetpack_relatedposts_filter_exclude_post_ids
    jetpack_relatedposts_filter_args
    array(

    'size' => 3,

    'post_type' => get_post_type(),

    'has_terms' => array(),

    'date_range' => array(),

    'exclude_post_ids' => array(),

    )
    

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79. jetpack_relatedposts_filter_exclude_post_ids
    jetpack_relatedposts_filter_args
    array(

    'size' => 3,

    'post_type' => get_post_type(),

    'has_terms' => array(),

    'date_range' => array(),

    'exclude_post_ids' => array(

    1,

    1337,

    ),

    )
    

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80. array(

    'size' => 3,

    'post_type' => get_post_type(),

    'has_terms' => array(),

    'date_range' => array(),

    'exclude_post_ids' => array(),

    )
    

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81. array(

    array(

    'term' => array( 'tag.slug' => 'hhvm' )

    ),

    array(

    'not' => array(

    'term' => array( 'post_id' => 1337 )

    )

    ),

    …

    )
    

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82. array(

    array(

    'term' => array( 'tag.slug' => 'hhvm' )

    ),

    array(

    'not' => array(

    'term' => array( 'post_id' => 1337 )

    )

    ),

    …

    )
    jetpack_relatedposts_filter_filters
    

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83. array(

    array(

    'term' => array( 'tag.slug' => 'hhvm' )

    ),

    array(

    'not' => array(

    'term' => array( 'post_id' => 1337 )

    )

    ),

    …

    )
    jetpack_relatedposts_filter_filters
    developer.wordpress.com/docs/elasticsearch
    

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84. Manipulating Results
    

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85. jetpack_relatedposts_filter_hits
    array(

    array( 'id' => 1337 ),

    array( 'id' => 631 ),

    array( 'id' => 1771 ),

    array( 'id' => 20 ),

    array( 'id' => 1491 ),

    )
    

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86. jetpack_relatedposts_filter_post_context
    

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87. jetpack_relatedposts_returned_results
    

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88. jetpack_relatedposts_returned_results
    [ {

    "id": 1771,

    "url": "http://xyu.io/2013/08/summer/",

    "url_meta": { "origin": 2361, "position": 0 },

    "title": "Summer!",

    "format": false,

    "excerpt": "The cats of summer…",

    "context": "In 'cat pictures'",

    "img": {

    "src": "http://xyu.io/2013/08/summer.jpg",

    "width": 350, "height": 200

    }

    }, … ]
    

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89. Related Posts for
    Power Users
    • Customize placement
    with the related posts

    shortcode
    • Change results or look
    and feel with various

    filters
    • Go completely wild
    with the related posts

    raw object
    IT'S OVER 9000!
    IT'S OVER 9000!
    

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90. Using the Related Posts Raw Object
    $related = Jetpack_RelatedPosts::init_raw()

    ->set_query_name( 'my_rp' ) // Optional

    ->get_for_post_id(

    $post_id, // For post_id

    5, // Get 5 results

    array( // ES filters

    array(

    'term' => array( 'tag.slug' => 'hhvm' )

    ),

    …

    )

    )
    developer.wordpress.com/docs/elasticsearch
    

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91. Using the Related Posts Raw Object
    $related = array(

    array( 'id' => 1337 ),

    array( 'id' => 631 ),

    array( 'id' => 1771 ),

    array( 'id' => 20 ),

    array( 'id' => 1491 ),

    )
    developer.wordpress.com/docs/elasticsearch
    

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92. Related Posts
    

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93. Thanks!
    Code Wrangler — Automattic
    
    @HypertextRanch
    
    me@xyu.io
    
    xyu.io
    
    xyu
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