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From Michael Dagaev <michael.dag...@gmail.com>
Subject Re: Backup again
Date Thu, 12 Feb 2009 17:15:56 GMT
Erik, thank you for the answer.

     I am afraid my question not clear.

     I agree that we can backup database
just by scanning it and writing the data somewhere
while the database is running.

     However, if we want to backup the database
_by copying the underlying HDFS file system_
we have to stop the database.

That is what I tried to say.


On Thu, Feb 12, 2009 at 7:02 PM, Erik Holstad <erikholstad@gmail.com> wrote:
> Hi Michael!
> I don't think that it is true that you can only backup system that are down,
> the backup tools that are posted in HBASE-974 can be used on system that are
> up and running.
> What that will do for you is to scan the tables and serialize those to disk
> and the
> other way around when importing.
> Will that work for you?
> Regards Erik
> On Thu, Feb 12, 2009 at 2:35 AM, Michael Dagaev <michael.dagaev@gmail.com>wrote:
>> Hi, all
>>     As I understand from the discussions on the list,
>> we can backup the file system only if Hbase is down.
>> If we want to run backup when Hbase is up
>> we can work on the Hbase level, i.e. use scan,
>> MR export/import utils, etc.  but we cannot backup
>> on the file system level.
>> Is it correct?
>> Thank you for your cooperation,
>> M.

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