Here is my hbase-site.xml:
configuration>
<property>
<name>hbase.cluster.distributed</name>
<value>true</value>
</property>
<property>
<name>hbase.rootdir</name>
<value>hdfs://server3.yun.com:54310/hbase</value>
<description>The directory shared by region servers.
</description>
</property>
<property>
<name>hbase.zookeeper.quorum</name>
<value>server3.yun.com</value>
</property>
<property>
<name>dfs.replication</name>
<value>1</value>
</property>
2011/7/28 Stack <[email protected]>
> On Wed, Jul 27, 2011 at 8:58 AM, 吴限 <[email protected]> wrote:
> > Setup:
> > -cdh3u0
> > - Hadoop 0.20.2
>
> You are using the hadoop from cdh3u0?
>
>
> > - dfs.replication is set to 1
> >
>
> You will lose data if a machine goes away. You have two machines but
> only one instance of each data block; think of it as half of your data
> one one node and the rest on another. If you kill one machine, half
> your data is gone.
>
>
> > After I restarted the regionserver which I had rebooted and checked
> again,
> > I found that some of the missing data was got back but there still
> existed
> > some data which hadn't been found yet.
>
>
> I wonder what was going on here that we didn't see it all restored.
>
>
> > This is problematic since we are supposed to
> > replicate at x1, so at least one other node should be able to
> > theoretically serve the *data* that the downed regionserver can't.
> >
>
> No. The behavior you describe would come with replication of 2, not 1.
>
> St.Ack
>
