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From "Mikhail Antonov (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-13964) Skip region normalization for tables under namespace quota
Date Mon, 29 Jun 2015 08:45:04 GMT

    [ https://issues.apache.org/jira/browse/HBASE-13964?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14605294#comment-14605294

Mikhail Antonov commented on HBASE-13964:

While thinking more on that, I 'm back to name vs space based quotas (maybe we should move
this to dev lists though?)

Like in HDFS there's name (# of inodes) and space (# of bytes) quotas. Bytes are resources
in terms of underlying storage, inodes are resources in terms of space in fsimage (I assume,
please correct me if I'm wrong). In HBase we have quotas on # of tables and regions, which
are resources from assignment manager throughput viewpoint, and indirect limit of storage
space used (can't eat up more than # of regions X max region size). 

On the other hand, we could just set quota in bytes directly, and allow any split/merges to
happen, since it can be considered that user is limited in the amount of data he/she could
store in HBase, but the layout of this data is (optionally) optimized and controlled by HBase
itself, so we may not want direct limit of # of regions.

[~tedyu@apache.org], [~ndimiduk] - thoughts?

> Skip region normalization for tables under namespace quota
> ----------------------------------------------------------
>                 Key: HBASE-13964
>                 URL: https://issues.apache.org/jira/browse/HBASE-13964
>             Project: HBase
>          Issue Type: Task
>          Components: Balancer, Usability
>            Reporter: Mikhail Antonov
>            Assignee: Ted Yu
>             Fix For: 2.0.0, 1.2.0, 1.3.0
>         Attachments: 13964-branch-1-v2.txt, 13964-branch-1-v3.txt, 13964-v1.txt
> As [~tedyu@apache.org] pointed out in HBASE-13103, we need to discuss how to normalize
regions of tables under namespace control. What was proposed is to disable normalization of
such tables.

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