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Mani_kumar_
Community Advisor
Mani_kumar_Community Advisor
Community Advisor
April 29, 2016

Two AEM instances Comparision

  • April 29, 2016
  • 4 replies
  • 10072 views

Hi All,

We have a requirement where we need to compare two AEM intances and extract the differences and also export the metadata(such as content name,type,size) of a jcr repository and hierarchical susbset.

1.  Is their any tool which will do this comparision.

2. Is their best ways to do it.

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4 replies

Ratna_Kumar
Ratna_Kumar
Level 10
April 29, 2016

Hi Manikumar,

Yes there is one Helpx article which tells on compare content and import tool - to compare and import content differences from one CQ instance to another CQ instance.

Check here for the same: https://helpx.adobe.com/experience-manager/kb/contentcompareimport.html - This is only for CQ 5.5 and AEM 5.6 and not for AEM 6.x

Thanks,
Ratna Kumar.

    Mani_kumar_
    Community Advisor
    Mani_kumar_Community AdvisorAuthor
    Community Advisor
    May 2, 2016

    Ratna Kumar wrote...

    Hi Manikumar,

    Yes there is one Helpx article which tells on compare content and import tool - to compare and import content differences from one CQ instance to another CQ instance.

    Check here for the same: https://helpx.adobe.com/experience-manager/kb/contentcompareimport.html - This is only for CQ 5.5 and AEM 5.6 and not for AEM 6.x

    Thanks,
    Ratna Kumar.

     

    I need this AEM 6.1 AEM instance.

      kautuk_sahni
      Community Manager
      kautuk_sahniCommunity Manager
      Community Manager
      May 2, 2016

      Hi Mani

      Please have a look at the details below:-

      Link:-http://adobe-consulting-services.github.io/acs-aem-commons/features/jcr-checksum-compare.html

      GitHub:-  ACS Adobe Experience Manager Commons GitHub page: “Quickly compares the contents of Adobe Experience Manager instances. JCR Compare computes checksums for specified node types (via an aggregated checksum of that node’s descendants) across multiple AEM instances and then compares the checksum results to identify what node (and node sub-systems) are the same or different.

      How it works
      You tell an AEM instance where it should find the instance to compare itself to, and define a number of useful comparisons to run, including based on a recursive path crawl, a JCR query, a list of known nodeTypes to include or exclude, and so on. It uses smart aggregate hashing to do the comparison and gives you the ability to drill into results to identify exactly what has changed.

      Audience Impact (authors, devs, admins)

      • Devs – Allows them to see if they missed something in the migration or development phase
      • Authors – Allows them to verify what was changed between two environments
      • Admins – Allows them to quickly smoke test auto-scaled instances

       

      JCR Compare via curl

      To use the tool, do the following:

      1. HTTP GET /bin/acs-commons/jcr-compare.hashes.txt?path=/content/my-site where /content/my-site should be replaced with the path you want to generate hashes for. For example:curl -u admin:admin http://localhost:4502/bin/acs-commons/jcr-compare.hashes.txt?path=/content/my-site > hashes_pub1.txt
      2. Save the output to a file and sort the results using the sort command on a linux machine then diff them. For example:
      cat hashes_pub1.txt | sort > hashes_pub1_sorted.txt cat hashes_pub2.txt | sort > hashes_pub2_sorted.txt diff hashes_pub1_sorted.txt hashes_pub2_sorted.txt

      Once you know which paths are different then you can go to each server you retrieved a diff against and use theHTTP GET /bin/acs-commons/jcr-compare.dump.json servlet to get a dump of the content. For example here is how you would request this for a particular node:

      curl -u admin:admin http://localhost:4502/bin/acs-commons/jcr-compare.dump.json?path=/content/my-site/en/jcr:content

      Then you can use a JSON diff tool to visualize the differences: http://tlrobinson.net/projects/javascript-fun/jsondiff

       

      I hope this would be helpful for you.

      Thanks and Regards

      Kautuk Sahni

      Kautuk Sahni
      Mani_kumar_
      Community Advisor
      Mani_kumar_Community AdvisorAuthor
      Community Advisor
      May 2, 2016

      kautuksahni wrote...

      Hi Mani

      Please have a look at the details below:-

      Link:-http://adobe-consulting-services.github.io/acs-aem-commons/features/jcr-checksum-compare.html

      GitHub:-  ACS Adobe Experience Manager Commons GitHub page: “Quickly compares the contents of Adobe Experience Manager instances. JCR Compare computes checksums for specified node types (via an aggregated checksum of that node’s descendants) across multiple AEM instances and then compares the checksum results to identify what node (and node sub-systems) are the same or different.

      How it works
      You tell an AEM instance where it should find the instance to compare itself to, and define a number of useful comparisons to run, including based on a recursive path crawl, a JCR query, a list of known nodeTypes to include or exclude, and so on. It uses smart aggregate hashing to do the comparison and gives you the ability to drill into results to identify exactly what has changed.

      Audience Impact (authors, devs, admins)

      • Devs – Allows them to see if they missed something in the migration or development phase
      • Authors – Allows them to verify what was changed between two environments
      • Admins – Allows them to quickly smoke test auto-scaled instances

       

      JCR Compare via curl

      To use the tool, do the following:

      1. HTTP GET /bin/acs-commons/jcr-compare.hashes.txt?path=/content/my-site where /content/my-site should be replaced with the path you want to generate hashes for. For example:curl -u admin:admin http://localhost:4502/bin/acs-commons/jcr-compare.hashes.txt?path=/content/my-site > hashes_pub1.txt
      2. Save the output to a file and sort the results using the sort command on a linux machine then diff them. For example:
      cat hashes_pub1.txt | sort > hashes_pub1_sorted.txt cat hashes_pub2.txt | sort > hashes_pub2_sorted.txt diff hashes_pub1_sorted.txt hashes_pub2_sorted.txt

      Once you know which paths are different then you can go to each server you retrieved a diff against and use theHTTP GET /bin/acs-commons/jcr-compare.dump.json servlet to get a dump of the content. For example here is how you would request this for a particular node:

      curl -u admin:admin http://localhost:4502/bin/acs-commons/jcr-compare.dump.json?path=/content/my-site/en/jcr:content

      Then you can use a JSON diff tool to visualize the differences: http://tlrobinson.net/projects/javascript-fun/jsondiff

       

      I hope this would be helpful for you.

      Thanks and Regards

      Kautuk Sahni

       

       

       

      Hi Sahni,

      I tried in my local instances and it is taking so much of time to compare a single page we want very optimised time to compare so that this could be done on Production instances which is having lot of content

       

      Thanks,

      Mani Kumar K

        kautuk_sahni
        Community Manager
        kautuk_sahniCommunity Manager
        Community Manager
        May 2, 2016

        I have asked internal team to look into this. I will share their response soon.

        ~kautuk

        Kautuk Sahni
        kautuk_sahni
        Community Manager
        kautuk_sahniCommunity Manager
        Community Manager
        May 5, 2016

        Hi 

        There is no OOTB or readily available component/Tools for this use case, apart from some mentioned by me above.

        But another option that you can do are:-

        Option 1 :- Create a custom component to that access JCR node via JCR API programmatically and iterate all the child.

        Here you can use the concept of comparing two trees (Link:- http://www.geeksforgeeks.org/write-c-code-to-determine-if-two-trees-are-identical/).

         

        Option 2 :- USE FTP client to import all the site under root folder for both instances, and then compare it with and text comparison tool.

         

        I hope this can also help you.

        Thanks and Regards

        Kautuk Sahni

        Kautuk Sahni
        Mani_kumar_
        Community Advisor
        Mani_kumar_Community AdvisorAuthor
        Community Advisor
        May 5, 2016

        Thanks for the above options and i will try to implement that for JCR comparisions but we one more usecase like extract metadata (name ,title and age etc.,) properties for whole project do we have any tool existing for this ?

         

        Thanks

        Mani Kumar K

          kautuk_sahni
          Community Manager
          kautuk_sahniCommunity Manager
          Community Manager
          May 5, 2016

          Manikumar wrote...

          Thanks for the above options and i will try to implement that for JCR comparisions but we one more usecase like extract metadata (name ,title and age etc.,) properties for whole project do we have any tool existing for this ?

           

          Thanks

          Mani Kumar K

           

          If You can achieve this for JCR, this means you are able to achieve it for metadata as well.

          Everything in AEM is stored as JCR (image, template, pages,Assets, metadata etc).

          Go to :- /content/dam/geometrixx-media/articles/andrew-novokov.jpg/jcr:content/metadata in CRXDE for looking how metadata is stored.

          If you want something specific that to only compare metadata then first do query to fetch metadata and then continue with your logic.

          Thanks and Regards

          Kautuk Sahni

          Kautuk Sahni
          aanchal-sikka
          Community Advisor
          aanchal-sikkaCommunity Advisor
          Community Advisor
          October 23, 2023

          Please refer to the JCR compare utility in ACS AEM commons: https://adobe-consulting-services.github.io/acs-aem-commons/features/jcr-compare/index.html

           

          This is a useful tool for checking for content inconsistencies across AEM instances that would be otherwise difficult to find.

          Aanchal Sikka
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