Hi Luke, Do you have any idea why creating the cluster from scratch creates "more balanced" cluster? Is this because of the actual partition sizes not being of equal size?
Manu From: Luke Bakken <[email protected]<mailto:[email protected]>> Date: Monday 2 June 2014 19:34 To: Manu Maki <[email protected]<mailto:[email protected]>> Cc: "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>> Subject: Re: Partition distribution between nodes Hi Manu, I see similar vnode distribution in my local dev cluster. This is due to 64 not being evenly divisible by 5. 4 nodes: $ dev1/bin/riak-admin member-status ================================= Membership ================================== Status Ring Pending Node ------------------------------------------------------------------------------- valid 25.0% -- '[email protected]<mailto:[email protected]>' valid 25.0% -- '[email protected]<mailto:[email protected]>' valid 25.0% -- '[email protected]<mailto:[email protected]>' valid 25.0% -- '[email protected]<mailto:[email protected]>' ------------------------------------------------------------------------------- 5th node added: $ dev1/bin/riak-admin member-status ================================= Membership ================================== Status Ring Pending Node ------------------------------------------------------------------------------- valid 18.8% -- '[email protected]<mailto:[email protected]>' valid 18.8% -- '[email protected]<mailto:[email protected]>' valid 18.8% -- '[email protected]<mailto:[email protected]>' valid 25.0% -- '[email protected]<mailto:[email protected]>' valid 18.8% -- '[email protected]<mailto:[email protected]>' ------------------------------------------------------------------------------- Cluster from scratch with 5 nodes: $ dev1/bin/riak-admin member-status ================================= Membership ================================== Status Ring Pending Node ------------------------------------------------------------------------------- valid 20.3% -- '[email protected]<mailto:[email protected]>' valid 20.3% -- '[email protected]<mailto:[email protected]>' valid 20.3% -- '[email protected]<mailto:[email protected]>' valid 20.3% -- '[email protected]<mailto:[email protected]>' valid 18.8% -- '[email protected]<mailto:[email protected]>' ------------------------------------------------------------------------------- -- Luke Bakken CSE [email protected]<mailto:[email protected]> On Mon, Jun 2, 2014 at 6:52 AM, Manu Mäki - Compare Group <[email protected]<mailto:[email protected]>> wrote: Hi all, In the beginning we were running four nodes with n-value of 2. The partitions were distributed 25% for each node. Now when we added fifth node (still having n-value of 2), the partitions are distributed in following way: 25%, 19%, 19%, 19% and 19%. The ring size in use is 64. Is this normal behavior? The cluster seems to be working correctly. However I was expecting each node to have 20% of the partitions. Best regards, Manu Mäki _______________________________________________ riak-users mailing list [email protected]<mailto:[email protected]> http://lists.basho.com/mailman/listinfo/riak-users_lists.basho.com
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