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  1. Couchbase Server
  2. MB-7768

Empty Bucket rebalancing nodes takes long.

    Details

    • Type: Story
    • Status: Resolved
    • Priority: Major
    • Resolution: Incomplete
    • Affects Version/s: 2.0.1
    • Fix Version/s: 3.0
    • Component/s: ns_server
    • Security Level: Public
    • Labels:
      None
    • Environment:
      2.0.1-160
      Linux
      1024 vbuckets
      4 Core system.

      Description

      Create 8 empty buckets on a single node.

      Add 4 more nodes on cluster.

      Rebalance.

      Rebalance is taking longer than 30 minutes to complete.

      Would like to understand system-expected behaviour for Empty-Bucket rebalances.

      Adding logs.

      No reviews matched the request. Check your Options in the drop-down menu of this sections header.

        Activity

        Hide
        alkondratenko Aleksey Kondratenko (Inactive) added a comment -

        May I have comparison of:

        • how long it takes to rebalance 1 bucket in your env.
        • how long it takes to rebalance 8 buckets in your env.

        ?

        So that I see if per-bucket rebalance time is growing too much with more buckets.

        Show
        alkondratenko Aleksey Kondratenko (Inactive) added a comment - May I have comparison of: how long it takes to rebalance 1 bucket in your env. how long it takes to rebalance 8 buckets in your env. ? So that I see if per-bucket rebalance time is growing too much with more buckets.
        Hide
        dipti Dipti Borkar added a comment -

        why is fix version 2.1? we need to look into it sooner. Also is this a regression compared with 2.0 ? also would be helpful to understand the answers to Alk's questions.

        Show
        dipti Dipti Borkar added a comment - why is fix version 2.1? we need to look into it sooner. Also is this a regression compared with 2.0 ? also would be helpful to understand the answers to Alk's questions.
        Hide
        farshid Farshid Ghods (Inactive) added a comment -

        this is not a regresson from 2.0.0 . we have seen this behavior during 2.0 testing as well that rebalancing many buckets even empty takes a while ( in this test is < 4 mins per bucket)

        this performance bug is filed to track this more closely and run more tests with empty buckets

        Show
        farshid Farshid Ghods (Inactive) added a comment - this is not a regresson from 2.0.0 . we have seen this behavior during 2.0 testing as well that rebalancing many buckets even empty takes a while ( in this test is < 4 mins per bucket) this performance bug is filed to track this more closely and run more tests with empty buckets
        Hide
        alkondratenko Aleksey Kondratenko (Inactive) added a comment -

        Some improvements were made (and I recall some perf regression happened in about same build numbers of 2.0.1 as this bug was reported against).

        Let's define precisely what is too slow and move from there. I'm not fan of tons of not very specific bugs open.

        Show
        alkondratenko Aleksey Kondratenko (Inactive) added a comment - Some improvements were made (and I recall some perf regression happened in about same build numbers of 2.0.1 as this bug was reported against). Let's define precisely what is too slow and move from there. I'm not fan of tons of not very specific bugs open.

          People

          • Assignee:
            ketaki Ketaki Gangal
            Reporter:
            ketaki Ketaki Gangal
          • Votes:
            1 Vote for this issue
            Watchers:
            5 Start watching this issue

            Dates

            • Created:
              Updated:
              Resolved:

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