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From Andrew Wang <andrew.w...@cloudera.com>
Subject Re: how about syncing namenode metadata to glusterfs?
Date Tue, 13 Sep 2016 17:46:16 GMT
This is a similar idea to NFS HA, which you can read about here:

https://hadoop.apache.org/docs/r2.7.2/hadoop-project-dist/hadoop-hdfs/HDFSHighAvailabilityWithNFS.html

This is definitely less preferred compared to using QJM, since you need an
external mechanism for fencing writes. FWIW, I don't know of anyone who is
still using NFS HA.

On Tue, Sep 13, 2016 at 7:31 AM, Zhe Zhang <zhe.zhang.research@gmail.com>
wrote:

> Hi Levi,
>
> This clearly should go to hdfs-dev instead of common-dev. Just using an HA
> storage for fsimage won't allow HDFS work without the current NN-HA
> framework. After all fsimage is only a checkpoint of NameNode state.
>
> On Tue, Sep 13, 2016 at 2:19 AM Levi Nie <levinie001@gmail.com> wrote:
>
> > Use glusterfs instead of disk to keep fsimage, will it work without HA?
> >
> --
> Zhe Zhang
> Apache Hadoop Committer
> http://zhe-thoughts.github.io/about/ | @oldcap
>

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