[jira] [Commented] (HBASE-18109) Assign system tables first (priority)

["stack (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-18109?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16174226#comment-16174226 ] 

stack commented on HBASE-18109:
-------------------------------

 See[https://issues.apache.org/jira/browse/HBASE-14190?focusedCommentId=16067981&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-16067981 ]from HBASE-14190, the branch-1 issue for assigning system tables ahead of user-space tables.

_If I am not wrong, for system tables expect meta we still share logs with user regions, so even if we have some logic to assign system tables first, we still need wait log splitting done and we can not guarantee logs of system tables are split first. So there may be a blocking task that we should make multi-log feature having priority and write entries of system table in the highest priority logs. Thanks._


> Assign system tables first (priority)
> -------------------------------------
>
>                 Key: HBASE-18109
>                 URL: https://issues.apache.org/jira/browse/HBASE-18109
>             Project: HBase
>          Issue Type: Sub-task
>          Components: Region Assignment
>    Affects Versions: 2.0.0
>            Reporter: stack
>            Assignee: Yi Liang
>            Priority: Critical
>             Fix For: 2.0.0, 3.0.0
>
>         Attachments: HBASE-18109-V1.patch, HBASE-18109-V2.patch
>
>
> Need this for stuff like the RSGroup table, etc. Assign these ahead of user-space regions.
> From 'Handle sys table assignment first (e.g. acl, namespace, rsgroup); currently only hbase:meta is first.' of https://docs.google.com/document/d/1eVKa7FHdeoJ1-9o8yZcOTAQbv0u0bblBlCCzVSIn69g/edit#heading=h.oefcyphs0v0x



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