Thank you Samir.
In my case there is a possibility that I am not aware of column families
upfront. Is there an easy way to programatically query for source table column
families and create a target table with the same column families?
I think I could use HTableDescriptor to get all column families for source
table and create the destination table with them and then set pre-splits.
Right?But is there any other way to do the same?
Thanks again,
Sumit
From: Samir Ahmic <[email protected]>
To: [email protected]
Sent: Wednesday, January 20, 2016 5:40 PM
Subject: Re: Table copies in hbase
By cloning snapshot you will have same number of regions in source and
destination table. If you want more pre-split in destination table then you
will have to use CopyTable tool. Simply create new table with same column
families as destination table and pre-split it with number of regions you
want then run CopyTable tool.
Regards
Samir
On Wed, Jan 20, 2016 at 12:24 PM, Ted Yu <[email protected]> wrote:
> There is also backup / restore (work in progress):
>
> https://issues.apache.org/jira/browse/HBASE-7912
>
> FYI
>
> On Wed, Jan 20, 2016 at 2:12 AM, Samir Ahmic <[email protected]>
> wrote:
>
> > Hi Sumit,
> > IMHO snapshots are easiest way to copy tables you need just to steps:
> >
> > 1. create snapshot
> > 2. clone snapshot to another table
> >
> > What version of hbase you are using? Regarding you question what will
> > happen in case operation fails in case of cloning snapshot i have never
> > experience such event if snapshot was not corrupted. In case of CopyTable
> > mr i assume that data will be partially copied. In any case your source
> > tables will be OK.
> >
> >
> > Regards
> > Samir
> >
> > On Wed, Jan 20, 2016 at 7:51 AM, Sumit Nigam
> <[email protected]
> > >
> > wrote:
> >
> > > Hi,
> > > I have a a few tables in hbase which I would like to create copies of.
> > The
> > > tables will be in same cluster.
> > > I wanted to know based on experience, which one of the options is
> better:
> > > 1. copyTable2. snapshot3. Any other?
> > > Besides efficiency aspect, I am also interested in knowing what happens
> > > when the operation fails midway copying from snapshot to destination
> > table.
> > > Or when it fails midway copying to destination table in copyTable
> option.
> > > Would data be left in inconsistent state?
> > > Thanks,Sumit
> >
>
