Virtual node in Cassandra:<\/h2>\n<\/div>\n<\/div>\n

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• Prior to Cassandra 1.2, every node was allocate to a particular token range.<\/li>\n
• Instead of a node being responsible for one large range of tokens, it is responsible for many smaller ranges.<\/li>\n
• In this way, one physical node is essentially hosting many smaller “virtual” nodes.<\/li>\n
• One of the new features slated for Cassandra 1.2’s release later this year is virtual nodes (vnodes.)<\/li>\n
• Vnodes:<\/b>\n
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  • If you recall how token selection works currently, there’s one token per node, and a node owns exactly one contiguous range in the ring space.<\/li>\n<\/ul>\n<\/li>\n
  • Vnodes modify this paradigm from one token per node to many token per node.<\/li>\n
  • Within a cluster these can be randomly selected and be non-contiguous, giving us many smaller ranges that belong to each node.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n
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    Advantages of virtual nodes<\/h2>\n<\/div>\n<\/div>\n

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    • Tokens are automatically measured and allocate to every node.<\/li>\n
    • when adding or removing nodes Re-balancing a cluster is automatically accomplished.<\/li>\n
    • When a node merge the cluster, it assumes responsibility for an even portion of data from the other nodes in the cluster.<\/li>\n
    • If a node fails, the load is develop evenly across other nodes in the cluster.<\/li>\n
    • Number of vNodes can be set as node level.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

      Answer : Prior to Cassandra 1.2, every node was allocate to a particular token range.<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"passster_activate_protection":false,"passster_protect_child_pages":"","passster_protection_type":"password","passster_password":"","passster_activate_overwrite_defaults":"","passster_headline":"","passster_instruction":"","passster_placeholder":"","passster_button":"","passster_id":"","passster_activate_misc_settings":"","passster_redirect_url":"","passster_hide":"no","passster_area_shortcode":"","gtb_hide_title":false,"gtb_wrap_title":false,"gtb_class_title":"","gtb_remove_headerfooter":false,"footnotes":""},"categories":[2642],"tags":[195,201,1119,203,2877,2660,2659,2658,2726,2731,2881,2879,2875,2689,2883,2730,2757,2756,2876,199,214,363,209,283,2676,205,485,2872,196,212,712,207,711,204,282,208,206,2677,200,2118,2874,197,2878,2880,2873,280,2882,364,216,285],"class_list":["post-442","post","type-post","status-publish","format-standard","hentry","category-cassandra","tag-accenture-interview-questions-and-answers","tag-allstate-solutions-pvt-ltd-interview-questions-and-answers","tag-att-interview-questions-and-answers","tag-capgemini-interview-questions-and-answers","tag-cassandra-2-node-cluster","tag-cassandra-dba-interview-questions","tag-cassandra-interview-questions","tag-cassandra-interview-questions-and-answers","tag-cassandra-node","tag-cassandra-nodetool","tag-cassandra-num_tokens","tag-cassandra-single-node-setup","tag-cassandra-token-range","tag-cassandra-tutorial","tag-cassandra-virtual-nodes","tag-cassandra-vnodes","tag-cassandra-vnodes-balancing","tag-cassandra-vnodes-configuration","tag-cassandra-vnodes-vs-nodes","tag-casting-networks-india-pvt-limited-interview-questions-and-answers","tag-cgi-group-inc-interview-questions-and-answers","tag-ciena-corporation-interview-questions-and-answers","tag-collabera-technologies-interview-questions-and-answers","tag-conduent-interview-questions-and-answers","tag-cvent-interview-questions-and-answers","tag-dell-international-services-india-pvt-ltd-interview-questions-and-answers","tag-ernst-young-interview-questions-and-answers","tag-how-data-is-distributed-in-cassandra","tag-ibm-interview-questions-and-answers","tag-indecomm-global-services-interview-questions-and-answers","tag-indiabulls-technology-solutions-ltd-interview-questions-and-answers","tag-mphasis-interview-questions-and-answers","tag-nagarro-software-pvt-ltd-interview-questions-and-answers","tag-oracle-corporation-interview-questions-and-answers","tag-persistent-systems-interview-questions-and-answers","tag-prokarma-softech-pvt-ltd-interview-questions-and-answers","tag-sap-labs-india-pvt-ltd-interview-questions-and-answers","tag-synechron-technologies-pvt-ltd-interview-questions-and-answers","tag-tech-mahindra-interview-questions-and-answers","tag-tecnotree-interview-questions-and-answers","tag-tokens-in-cassandra","tag-unitedhealth-group-interview-questions-and-answers","tag-virtual-node","tag-virtual-nodes","tag-virtual-nodes-consistent-hashing","tag-virtusa-consulting-services-pvt-ltd-interview-questions-and-answers","tag-vnodes-in-cassandra","tag-wells-fargo-interview-questions-and-answers","tag-wipro-interview-questions-and-answers","tag-xoriant-solutions-pvt-ltd-interview-questions-and-answers"],"yoast_head":"\n