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From Ted Yu <yuzhih...@gmail.com>
Subject Re: Improving on MTTR of cluster [Hbase - 1.1.13]
Date Mon, 10 Sep 2018 16:02:26 GMT
For the second config you mentioned, hbase.master.distributed.log.replay,
see http://hbase.apache.org/book.html#upgrade2.0.distributed.log.replay

FYI

On Mon, Sep 10, 2018 at 8:52 AM sahil aggarwal <sahil.agg15@gmail.com>
wrote:

> Hi,
>
> My cluster has around 50k regions and 130 RS. In case of unclean shutdown,
> the cluster take around 40 50 mins to come up(mostly slow on region
> assignment from observation). Trying to optimize it found following
> possible configs:
>
> *hbase.assignment.usezk:* which will co-host meta table and Hmaster and
> avoid zk interaction for region assignment.
> *hbase.master.distributed.log.replay:* to replay the edit logs in
> distributed manner.
>
>
> Testing *hbase.assignment.usezk* alone on small cluster(2200 regions, 4 RS)
> gave following results:
>
> hbase.assignment.usezk=true -> 12 mins
> hbase.assignment.usezk=false -> 9 mins
>
>
> From this blog
> <https://blogs.apache.org/hbase/entry/hbase_zk_less_region_assignment>, i
> was expecting better results so probably I am missing something. Will
> appreciate any pointers.
>
> Thanks,
> Sahil
>

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