Uploaded image for project: 'Couchbase Server'
  1. Couchbase Server
  2. MB-56547

Selectively enable out-of-seqno backfill only when expected to be faster than seqno

    XMLWordPrintable

Details

    • 0
    • KV 2023-2, KV 2023-4

    Description

      As per analysis in MB-56346, out-of-seqno (OSO) backfill is not always beneficial compared to seqno backfill - for larger collections and/or small value sizes it can be significantly slower than "classic" seqno backfill.

      We need to modify the logic of when OSO backfill is performed to not only consider when it is possible (i.e. client supports OSO, single collection from zero), but also when it is expected to be faster than seqno.

      Attachments

        Issue Links

          causes

          Bug - A problem which impairs or prevents the functions of the product. MB-57608 OSO backfill: memcached log formatting error

          • Minor - Minor loss of function, or other problem where easy workaround is present.
          • Closed

          Task - A task that needs to be done. MB-58741 XDCR - dev test for OSO broken due to KV changes

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

          Bug - A problem which impairs or prevents the functions of the product. MB-57882 Re-enable OSO (Revert MB-56428)

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

          Bug - A problem which impairs or prevents the functions of the product. MB-59304 [BP to 7.2.x] Re-enable OSO (Revert MB-56428)

          • Critical - Crashes, loss of data, severe memory leak.
          • Resolved
          No reviews matched the request. Check your Options in the drop-down menu of this sections header.

          Activity

            People

              ashwin.govindarajulu Ashwin Govindarajulu
              drigby Dave Rigby (Inactive)
              Votes:
              0 Vote for this issue
              Watchers:
              9 Start watching this issue

              Dates

                Created:
                Updated:
                Resolved:

                PagerDuty