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Time/Place

This meeting is a hybrid teleconference and IRC chat. Anyone is welcome to join...here's the info:

Attendees 

Agenda

  1. How many child resources do I have?  FCREPO-1880 - Getting issue details... STATUS
  2. Modeshape 5.x update
  3. Next steps: Fedora specification
    1. Service detailing
    2. Alt implementation verification
    3. TCKs
    4. Spec writing
    5. LDP and other standards coordination
  4. MySQL migration testing
  5. Fedora backup: documents_000001.bin.gz
  6. Status of "in-flight" tickets

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Ticket Summaries

  1. Please squash a bug!

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  2. Tickets resolved this week:

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  3. Tickets created this week:

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Minutes

Child Resources

  • Assumption: When you make a request on a container you should know how many children that container has
  • Fedora should provide this information
  • Going into a paging scenario with this information would be nice
  • The current code iterates over all the children and counts them
    • This can be a performance issue with very large numbers (millions) of children
  • Instead of dynamically creating this count, we could maintain a property that gets updated when children are created or removed
    • Right now, we don’t have good information on when children are created via federation
    • In general, it is difficult to know how many children are in a federated file system period. This should not stop us from making in-repository storage perform better
  • There is a child count property we could use - it does not indicate whether those children are in repository or federated storage
  • Could we use a listener to listen for federated changes and update the property in Modeshape?
    • Record number of children, bytes, and a timestamp and us a TTL to update at periodic intervals
    • Not sure if we could override the way the federated filesystem gets queried for its contents
    • We could pursue one solution for in-repository content and another solution for federated resources
      • Both solutions should use and maintain the same property
  • Action: Create a separate ticket for each solution

ModeShape 5 Update

  • There will probably be a couple more 4.x releases
  • ModeShape 5 is projected to be released in March
  • We will want to install and test this release with Fedora 4 when it is available 

Fedora Specification

  • A message regarding the API spec was sent to the Fedora community yesterday
  • We want to clearly define what Fedora is in a specification
  • The proposal includes API and SPI services and WebAC for authorization
  • An effort is currently underway to detail each of the services
  • We want to have a number of alternate implementations to verify that the API is independent of any particular implementation 
  • We need to have TCKs that progress alongside the specification work
  • Who will volunteer to take responsibility for the service pages on the wiki?
  • What will the final spec look like and where will it live?
    • It should be in the same form as the other W3C recommendation documents that are out there
    • It should not just live in GitHub or on a wiki
    • W3C Respec for authoring: https://www.w3.org/respec/
  • This is difficult to do in the wiki. Probably still difficult in GitHub
    • Maybe a Google Doc?
      • Useful but will not help produce a spec doc
    • Are GitHub issues a barrier?
    • Could we use JIRA instead since we already have a running instance?
  • Action: As a starting point we will use a Google Doc but transfer to something else if need be

MySQL Migration Testing

  • There are some documented issues with LevelDB
  • Need to migrate backup dump from LevelDB to few Fedora repo with MySQL to test
  • Action: Yinlin Chen will test a migration from LevelDB to MySQL FCREPO-1906 - Getting issue details... STATUS

Fedora Backup

  • There is no guarantee of order of resources in a Fedora backup dump