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  1. Couchbase Server
  2. MB-37402

Collections: Handling max-visible seqno

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Details

    • Task
    • Resolution: Fixed
    • Major
    • 7.0.0
    • None
    • couchbase-bucket
    • None

    Description

      New meta-data was added to the 6.5 release, the max-visible seqno. This is a seqno that increments for committed changes (so a prepare or abort will not increment this value). The max-visible seqno is then used to primarily ensure DCP snapshot markers don't include an end-seqno which won't be sent to the client (for clients that don't enable sync-replication).

      With the addition of collections we would like to avoid having a per-collection max-visible seqno and it should be possible.

      1) The DCP collection's DCP changes will include a new DCP message which collection aware clients will be sent, 'DCP skip' will be sent if a stream's snapshot ends on a prepare/abort.

      2) The max-visible seqno as it is today will still exist, but only apply to the default collection. This is because KV still needs to support 'legacy' DCP, those which can only see the default collection.

      Attachments

        Issue Links

          causes

          Bug - A problem which impairs or prevents the functions of the product. MB-39005 ActiveStream seqnoAdvanced may dereference null vBucket

          • Major - Major loss of function.
          • Closed
          has to be done before

          Bug - A problem which impairs or prevents the functions of the product. MB-38085 FTS's indexing progress and tracking stats are off with collections

          • Critical - Crashes, loss of data, severe memory leak.
          • Closed
          relates to

          Bug - A problem which impairs or prevents the functions of the product. MB-32231 Collections: Filtered Disk Snapshot end can be incorrect

          • Major - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MB-37873 A collection with 100% items purged sends a snapshot marker but not the end

          • Major - Major loss of function.
          • Closed
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              richard.demellow Richard deMellow
              jwalker Jim Walker
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              Dates

                Created:
                Updated:
                Resolved:

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