Dear all,
I want to design Follower schema like Twitter. I have 2 design
Design 1:
userId{//rowkey
followerId: time,
}
Design 2 :
[userId][followerId]{//rowkey
"time": time
}
I have 2 question:
1. Does HBase support scan data of rowkey by column?
2. Which design is better? I think that
Dear all,
I have 50,000 row with diagnosis qualifier = "cardiac", and another 50,000 rows
with "renal".
When I type this in Hbase shell,
import org.apache.hadoop.hbase.filter.CompareFilter
import org.apache.hadoop.hbase.filter.SingleColumnValueFilter
import org.apache.hadoop.hbase.filter.Subst
Hello:
If I am unable to do JAVA coding and prefer HBase shell for HBase
works/interactions, will I be able to do all operations?
i.e.
Is JAVA coding (Client API) needed to do something in HBase which is not
possible by HBase shell commands?
Thank You,
Sudeep Pandey
Ph: 5107783972
Hi：
I expect synchrodata between hbase 0.9 and hbase 1.2.
What's more,I find several ways to do it.
Follow :
1.replication (need modify)
2.sync hlog before delete to hdfs .oldlog (need modify)
3.client writes data to two hbase
4.client writes data to kafka and consume to two hbase
But, I think th
> I have 2 question:
> 1. Does HBase support scan data of rowkey by column?
You mean secondary indexes? No:
http://hbase.apache.org/book.html#secondary.indices
> 2. Which design is better? I think that design 2 is better when user have
> large amount of follower.
I cover a bunch of designs in th
Hi Dalia,
I think you can make a small sample of the table to do the test, then
you'll find what's the difference of scan and count.
because you can count it by human.
Best regards,
Andy
2012/12/24 Dalia Sobhy
>
> Dear all,
>
> I have 50,000 row with diagnosis qualifier = "cardiac", and anothe
I think you can take a look at your row-key design and evenly
distribute your data in your cluster, as you mentioned even if you
added more nodes, there was no improvement of performance. Maybe you
have a node who is a hot spot, and the other nodes have no work to do.
regards!
Yong
On Tue, Dec 2
Dear yong,
How to
distribute my data in the cluster ? Note that I am using cloudera manager 4.1
Thanks in advance:D
> Date: Fri, 28 Dec 2012 20:38:22 +0100
> Subject: Re: Hbase Question
> From: yongyong...@gmail.com
> To: user@hbase.apache.org
>
> I think you can take a lo
esday, April 09, 2013 6:53 PM
To: Rami Mankevich
Cc: apurt...@apache.org
Subject: Re: Hbase question
Hi Rami,
It is no problem to create threads in a coprocessor as a generic answer. More
specifically there could be issues depending on exactly what you want to do,
since coprocessor code changes
ouldn't be any issue with that. Am I correct?
>
> In addition - Is there any Hbase Thread pool I can use?
>
>
> Thanks
> From: Andrew Purtell [mailto:apurt...@apache.org]
> Sent: Tuesday, April 09, 2013 6:53 PM
> To: Rami Mankevich
> Cc: apurt...@apache.org
> Subjec
threads.
> > As I understand - shouldn't be any issue with that. Am I correct?
> >
> > In addition - Is there any Hbase Thread pool I can use?
> >
> >
> > Thanks
> > From: Andrew Purtell [mailto:apurt...@apache.org]
> > Sent: Tuesday, April 09, 2013
not to block user reponse.
> > >
> > > The only reason I was asking is to be sure Hbase will not kill those
> > > threads.
> > > As I understand - shouldn't be any issue with that. Am I correct?
> > >
> > > In addition - Is there any Hba
I have additional question:
Hbase is built on top of hadoop.
Does HBases uses HDFS only of hadoop or uses Map Reduce Jobs engine as well?
Thanks a lot!
From: Rami Mankevich
Sent: Tuesday, April 09, 2013 8:52 PM
To: 'user@hbase.apache.org'
Cc: 'Andrew Purtell'
Subject: RE: H
question:
> Hbase is built on top of hadoop.
> Does HBases uses HDFS only of hadoop or uses Map Reduce Jobs engine as
> well?
> Thanks a lot!
>
>
> From: Rami Mankevich
> Sent: Tuesday, April 09, 2013 8:52 PM
> To: 'user@hbase.apache.org'
> Cc: 'Andrew Pu
ap Reduce Jobs engine as
> well?
> Thanks a lot!
>
>
> From: Rami Mankevich
> Sent: Tuesday, April 09, 2013 8:52 PM
> To: 'user@hbase.apache.org'
> Cc: 'Andrew Purtell'
> Subject: RE: Hbase question
>
> First of all - thanks for the quick response.
gt; >
> >
> > From: Rami Mankevich
> > Sent: Tuesday, April 09, 2013 8:52 PM
> > To: 'user@hbase.apache.org'
> > Cc: 'Andrew Purtell'
> > Subject: RE: Hbase question
> >
> > First of all - thanks for the quick response.
> >
We usually try to have a shell way of doing all public facing operations.
In particular, I'd say if something shows up in the ref guide[1] without a
shell way to do it, I'd consider it a bug. The one big caveat is that the
shell is not performant for doing data inserts or fetching. Those functions
If you are comfortable with SQL
I would look into Phoenix
http://phoenix.apache.org/index.html
On Thu, Mar 12, 2015 at 10:00 PM, Sudeep Pandey
wrote:
> Hello:
>
> If I am unable to do JAVA coding and prefer HBase shell for HBase
> works/interactions, will I be able to do all operations?
> i.e.
Have you looked at the REST API? Can that be an option for you?
Le 2015-03-13 11:28, "Sudeep Pandey" a écrit :
> Hello:
>
> If I am unable to do JAVA coding and prefer HBase shell for HBase
> works/interactions, will I be able to do all operations?
> i.e.
>
> Is JAVA coding (Client API) needed to
Meh.
Go to Hive instead.
> On Mar 13, 2015, at 11:35 AM, Abraham Tom wrote:
>
> If you are comfortable with SQL
> I would look into Phoenix
> http://phoenix.apache.org/index.html
>
>
> On Thu, Mar 12, 2015 at 10:00 PM, Sudeep Pandey
> wrote:
>
>> Hello:
>>
>> If I am unable to do JAVA co
Hi,
No matter how many versions of HBase class in your jar, the classloader
will choose the first one on the classpath.
Perhaps you could consider OSGi (A kind of module system).
2017-11-17 18:57 GMT+08:00 apple :
> Hi：
> I expect synchrodata between hbase 0.9 and hbase 1.2.
> What's more,I fin
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