Alter Number Of Buckets In Hive at Michael Tompkins blog

Alter Number Of Buckets In Hive.  — the key observation is that because the number of buckets is fixed (per partition), having a large number of distinct values in the bucketing.  — so if you bucket by 31 days and filter for one day hive will be able to more or less disregard 30 buckets.  — in general, the bucket number is determined by the expression hash_function (bucketing_column) mod. while creating table you can specify like clustered by (empno) into xx buckets; Allows the correct number of reducers and the cluster. Where xx is the number of buckets.  — these steps should do the trick: num_buckets is the number of buckets you want to create. Insert all your data into it. Create a new table with the right structure.  — the command set hive.enforce.bucketing = true;

Advanced Hive Concepts and Data File Partitioning in Big data
from multitechnewstoday.blogspot.com

 — so if you bucket by 31 days and filter for one day hive will be able to more or less disregard 30 buckets. Create a new table with the right structure. Insert all your data into it.  — the key observation is that because the number of buckets is fixed (per partition), having a large number of distinct values in the bucketing.  — these steps should do the trick: num_buckets is the number of buckets you want to create. Where xx is the number of buckets.  — the command set hive.enforce.bucketing = true; while creating table you can specify like clustered by (empno) into xx buckets; Allows the correct number of reducers and the cluster.

Advanced Hive Concepts and Data File Partitioning in Big data

Alter Number Of Buckets In Hive num_buckets is the number of buckets you want to create. Allows the correct number of reducers and the cluster.  — so if you bucket by 31 days and filter for one day hive will be able to more or less disregard 30 buckets.  — the key observation is that because the number of buckets is fixed (per partition), having a large number of distinct values in the bucketing.  — in general, the bucket number is determined by the expression hash_function (bucketing_column) mod. Create a new table with the right structure. while creating table you can specify like clustered by (empno) into xx buckets;  — the command set hive.enforce.bucketing = true; num_buckets is the number of buckets you want to create. Insert all your data into it.  — these steps should do the trick: Where xx is the number of buckets.

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