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  1. Couchbase Server
  2. MB-10291

[OoO]: cbmcd connections cannot be efficiently used since operations are never interleaved

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Details

    • Improvement
    • Resolution: Fixed
    • Major
    • 7.0.0
    • 2.5.0, 3.0, 4.5.0, 4.6.0, 4.6.4, 4.6.3, 4.6.5, 5.0.0, 5.0.1, 5.5.0, 5.5.1
    • memcached
    • Security Level: Public

    Description

      This long-known architectural issue is that currently every operation is sent back in the order in which it had been received. Thus for a set of requests A, B, C, D, any background fetch latency on item B will also affect service times with C and D.

      Existing memcached protocol does not state that operations must be handled in order, but owing to the one implementation doing so and all clients having been built/tested against that implementation, it's possible that there are erroneous dependencies on current behavior.

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        Issue Links

          blocks

          Improvement - An improvement or enhancement to an existing feature or task. MB-23243 Support for High DGM use case for large datasets

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

          Bug - A problem which impairs or prevents the functions of the product. MB-37512 30% drop in transaction throughput in 7.0.0-1165 build for durability enabled cases

          • Major - Major loss of function.
          • Closed
          is duplicated by

          Improvement - An improvement or enhancement to an existing feature or task. MB-27090 Enable operations to complete out of order on a single application conneciton

          • Major - Major loss of function.
          • Closed
          relates to

          Epic - Created by Jira Software - do not edit or delete. Issue type for a big user story that needs to be broken down. MB-14423 Greenstack

          • Major - Major loss of function.
          • Resolved
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              ashwin.govindarajulu Ashwin Govindarajulu
              ingenthr Matt Ingenthron
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              Dates

                Created:
                Updated:
                Resolved:

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