accumulo-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Eric Newton <>
Subject Re: Waiting for accumulo to be initialized
Date Wed, 27 Mar 2013 19:33:24 GMT
If you lose zookeeper, you can move the files aside in HDFS, recreate your
instance in zookeeper and bulk import all of the old files.  It's not
perfect: you lose table configurations, split points and user permissions,
but you do preserve most of the data.

You can back up each of these bits of information periodically if you like.
 Outside of the files in HDFS, the configuration information is pretty


On Wed, Mar 27, 2013 at 3:18 PM, Aji Janis <> wrote:

> Eric and Josh thanks for all your feedback. We ended up *loosing all our
> accumulo data* because I had to reformat hadoop. Here is in a nutshell
> what I did:
>    1. Stop accumulo
>    2. Stop hadoop
>    3. On hadoop master and all datanodes, from
>    (hdfs-site.xml) remove everything under the data folder
>    4. On hadoop master, from (hdfs-site.xml) remove
>    everything under the name folder
>    5. As hadoop user, execute.../hadoop/bin/hadoop namenode -format
>    6. As hadoop user, execute.../hadoop/bin/ ==> should
>    populate data/ and name/ dirs that was erased in steps 3, 4.
>    7. Initialized Accumulo - as accumulo user,  ../accumulo/bin/accumulo
>    init (I created a new instance)
>    8. Start accumulo
> I was wondering if anyone had suggestions or thoughts on how I could have
> solved the original issue of accumulo waiting initialization without
> loosing my accumulo data? Is it possible to do so?

View raw message