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From WangYQ <wangyongqiang0...@163.com>
Subject Re: Re: Re: single thread threadpool for master_table_operation
Date Wed, 20 Apr 2016 14:35:47 GMT
cp is coprocsssor

this step is carried out before upgrade hbase, so after remove cp, old hbase will not be used

so i want to increase the pool size in old version to speed up the process of removing cp



On 2016-04-20 22:01 , Ted Yu Wrote:

bq. all cp of all tables

What does cp mean ? Do you mean column family ?

bq. will never create/enable tables in the future

Then what would the cluster be used for ?

On Wed, Apr 20, 2016 at 6:16 AM, WangYQ <wangyongqiang0617@163.com> wrote:

> i want to remove all cp of all tables in hbase
> so i disable tables concurrently, and then modify tables
> for hundreds of tables, remove all cp costs 30 miniutes,  is not so fast
>
>
> so, i want to speed the whoe process. and will never create/enable tables
> in the future
>
>
> after examine the code, i want ot increase the  pool size for
> master_table_operation
>
>
> but not sure if there are any problems.
>
>
> thanks..
>
> At 2016-04-20 21:07:06, "Ted Yu" <yuzhihong@gmail.com> wrote:
> >Adding subject.
> >
> >Adding back user@hbase
> >
> >But the master wouldn't know what next action admin is going to perform,
> >right ?
> >
> >On Wed, Apr 20, 2016 at 5:59 AM, WangYQ <wangyongqiang0617@163.com>
> wrote:
> >
> >> if i just disable tables in concurrently,
> >> and will never enable, modify, create table
> >>
> >> i think is ok, right?
> >>
> >>
> >>
> >>
> >> 在2016年04月20日 20:53 ,Ted Yu <yuzhihong@gmail.com>写道:
> >>
> >>
> >> Have you seen the comment above that line ?
> >>
> >>    // We depend on there being only one instance of this executor
> running
> >>    // at a time.  To do concurrency, would need fencing of
> enable/disable
> >> of
> >>    // tables.
> >>    // Any time changing this maxThreads to > 1, pls see the comment at
> >>    // AccessController#postCreateTableHandler
> >>
> >> BTW in the future, please send queries to user@hbase
> >>
> >> On Wed, Apr 20, 2016 at 5:50 AM, WangYQ <wangyongqiang0617@163.com>
> wrote:
> >>
> >>> hbase 0.98.10
> >>>
> >>> in class hmaster
> >>> line 1298, the threadpool size for master_table_operation is 1, can not
> >>> be set
> >>>
> >>> are there any problems if i disable tables in concurrently
> >>>
> >>> thanks
> >>
> >>
> >>
> >>
> >>
>
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