This is rather dated. I would love to sew the side by side justification if
anyone has made the transition lately.
Sent from my iPhone
On Aug 30, 2011, at 12:02 AM, Chris Tarnas c...@email.com wrote:
Someone with better knowledge than might be interested in helping answer this
question
My bad. Was looking on the date of the link. Not the post. Please ignore.
Sent from my iPhone
On Aug 30, 2011, at 12:02 AM, Chris Tarnas c...@email.com wrote:
Someone with better knowledge than might be interested in helping answer this
question over at StackOverflow:
We are attempting to build what is akin to a CRM (but not).
Our backend is an interface in which clients can control the variables of their
assets offering; the variables of the template they use act as the over call on
the Db.
Within the UI, they have the ability to set thresholds for
Hi,
Can you please give an example or explain in more detail what you are trying
to achieve.
Best Regards,
Sonal
Crux: Reporting for HBase https://github.com/sonalgoyal/crux
Nube Technologies http://www.nubetech.co
http://in.linkedin.com/in/sonalgoyal
On Tue, Aug 30, 2011 at 11:59 AM,
2011/8/29 highpointe highpoint...@gmail.com
We are attempting to build what is akin to a CRM (but not).
Our backend is an interface in which clients can control the variables of
their assets offering; the variables of the template they use act as the
over call on the Db.
Within the UI,
Thanks for the response Sonal. Here is an example.
The client (backend) is online grocers. The front end client is shoppers /
consumers.
The grocers have an interface that they can log into and enter their
inventory. Example: Apple = 9
The front end is simple; two values the users enter:
Very interesting.
Have you deployed such a setup? How is the performance? It seems it would
require quite a bit more than commodity hardware.
H-p
On Tue, Aug 30, 2011 at 12:37 AM, lohit lohit.vijayar...@gmail.com wrote:
2011/8/29 highpointe highpoint...@gmail.com
We are attempting to
How about a table which has product codegrocerCode as the key, and
column family items with qualifier quantity. You can have other column
families like grocer(columns name etc) Then you can scan for productCode and
return those grocers whose items:quantiy 0.
Best Regards,
Sonal
Crux: Reporting
Inline.
Sent from my iPhone
On Aug 30, 2011, at 2:15 AM, Sonal Goyal sonalgoy...@gmail.com wrote:
This part I understand. And in essence the would be a key for each product a
grocer sells, yes?
How about a table which has product codegrocerCode as the key, and
column family items with
Hi Chris,
Appreciate your answer on the post.
Personally speaking however the endless Cassandra vs. HBase discussion is
tiresome and rarely do blog posts or emails in this regard shed any light.
Often, Cassandra proponents mis-state their case out of ignorance of HBase or
due to commercial or
I was talking about concatenating the product code and grocer code. Use that
as the rowkey, and put quantity as a column. You can then scan for a
particular product code, and return only those rows where quantity is
greater than zero.
Best Regards,
Sonal
Crux: Reporting for HBase
On Tue, Aug 30, 2011 at 11:47, Andrew Purtell apurt...@apache.org wrote:
Hi Chris,
Appreciate your answer on the post.
Personally speaking however the endless Cassandra vs. HBase discussion is
tiresome and rarely do blog posts or emails in this regard shed any light.
Often, Cassandra
A question inline:
On Tue, Aug 30, 2011 at 2:47 AM, Andrew Purtell apurt...@apache.org wrote:
Hi Chris,
Appreciate your answer on the post.
Personally speaking however the endless Cassandra vs. HBase discussion is
tiresome and rarely do blog posts or emails in this regard shed any light.
I don't understand why you're having trouble with this.
You have a simple geo location search based on zip and then a product and
inventory count.
I mean its not really geo-spatial because you're searching based on zip code.
So you don't need to worry about any sort of geospatial or geodetic
You still need to organize your vendors by delivery zip.
Which gets very ugly when you try product code grocerCode.
Even doing something like zipproductvendor as your key gets you a lot of
rows.
This will work, where you have columns for price, qty on hand , sku, etc...
The problem gets
Thank you all for your input. I think I am closer to a solution that will work.
Cheers.
H-p
Sent from my iPhone
On Aug 30, 2011, at 4:57 AM, Sonal Goyal sonalgoy...@gmail.com wrote:
I was talking about concatenating the product code and grocer code. Use that
as the rowkey, and put
Hi
I would like to generate a findbugs HTML report for the HBASE code.
I have added the plugin in the POM.xml.
When i issue mvn findbugs:findbugs am able to get only an XML file. How to
get an HTML file.
Regards
Ram
Hi Friends,
I referred http://hbase.apache.org/book.html#copytable and I am successful in
copying my table within same cluster. I am then trying to copy m table to other
Hadoop-Hbase cluster but facing issues in that .
I used following command format :
./hbase
The Hdfs write pipeline is synchronous, so there is no window.
On Aug 30, 2011 4:35 AM, Sam Seigal selek...@yahoo.com wrote:
A question inline:
On Tue, Aug 30, 2011 at 2:47 AM, Andrew Purtell apurt...@apache.org
wrote:
Hi Chris,
Appreciate your answer on the post.
Personally speaking
Is the replication strategy for HBase completely reliant on HDFS' block
replication pipelining ?
Yes.
Is this replication process asynchronous ?
No.
Best regards,
- Andy
Problems worthy of attack prove their worth by hitting back. - Piet Hein (via
Tom White)
I really like the theory of operation stuff. People say that
centralized operation is a flaw, but I say it's a strength. In a
single datacenter, you have extremely fast .1ms ping or less, there is
no need for a fully decentralized architecture - it can be really hard
to debug.
-ryan
On Tue, Aug
After the reducer phase the table.put(put) part insert content twice in the
table
1)as actual key value
2)actual key and value as empty string.
Can anyone give me as solution to this issue
Hi ,
I tried debugging this and got to know that in my master hbase cluster 41181
port is not opened. I tried telnet to this port but connection refused.
Following are the steps did :
Start Hadoop
Start Hbase
Created a table via hbase shell
List the contents of table via hbase shell
Tried
Your remote cluster reports the location of -ROOT- as on localhost on
port 41181:
11/08/30 19:27:47 DEBUG
client.HConnectionManager$HConnectionImplementation: Lookedup root
region location,
Hi,
We have been working on a CMS over HBase in conjunction with Solr for
Full-text Search for our internal product. Now that it is at a stage
we can share with others, we would like to have some feedback from
you.
Home Page: http://kenai.com/projects/smart-cms/pages/Home
Pages Relevant to ORM:
Well, it doesn't. I mean, AFAIK there's no bug in the code that does
that, so it's probably your code.
Wild guess, maybe you are using your own HTable to put plus you emit a
Put in the reducer?
J-D
On Tue, Aug 30, 2011 at 9:21 AM, sriram rsriram...@gmail.com wrote:
After the reducer phase the
It's all optional.
J-D
On Mon, Aug 29, 2011 at 10:56 PM, Steinmaurer Thomas
thomas.steinmau...@scch.at wrote:
Hi Doug,
thanks, but the given example is exactly the one I provided in the link.
I don't use Replication yet, so I wonder what the rs.class properties
should be ... Or is this just
If you want to limit the number of rows you can instead set the
caching to exactly what you need, or set a stop row.
J-D
On Mon, Aug 29, 2011 at 11:38 PM, Neerja Bhatnagar neerja...@gmail.com wrote:
Hi J-D,
Thank you very much! Hopefully, this iteration clears it up for me.
The batchSize is
Yes you are right.
What should i do?
tmp.java:595: cannot find symbol
symbol : method
initTableReducerJob(java.lang.String,java.lang.Class
org.myorg.WordCount.IntSumReducer,
org.apache.hadoop.mapreduce.Job)
location: class org.apache.hadoop.hbase.mapreduce.TableMapReduceUtil
TableMapReduceUtil.initTableReducerJob(table,
Put only one, either the HTable or the output format.
J-D
On Tue, Aug 30, 2011 at 10:56 AM, sriram rsriram...@gmail.com wrote:
Yes you are right.
What should i do?
Configuration config= context.getConfiguration();
HTable table = new HTable(config,index);
context.write(key, new Text(toReturn.toString()));
Enumeration e = temp.keys();
Put put = new Put(Bytes.toBytes(key.toString()));
while(e.hasMoreElements())
{
This is another erroer shown
tmp.java:595: cannot find symbol
symbol : method
initTableReducerJob(java.lang.String,java.lang.Class
org.myorg.WordCount.IntSumReducer,
org.apache.hadoop.mapreduce.Job)
location: class org.apache.hadoop.hbase.mapreduce.TableMapReduceUtil
Will the write call to HBase block until the record written is fully
replicated ? If not (since it is happening at the block level), then isn't
there a window where a region server goes down, the data might not be
available anywhere else, until it comes back up ?
On Tue, Aug 30, 2011 at 9:17 AM,
On Tue, Aug 30, 2011 at 12:22 PM, Sam Seigal selek...@yahoo.com wrote:
Will the write call to HBase block until the record written is fully
replicated ?
no. data isn't written to disk immediately
If not (since it is happening at the block level), then isn't
there a window where a region
While data is not fsynced to disk immediately, it is acked by 3
different nodes (Assuming r=3) before HBase acks the client.
-ryan
On Tue, Aug 30, 2011 at 1:04 PM, Joseph Boyd
joseph.b...@cbsinteractive.com wrote:
On Tue, Aug 30, 2011 at 12:22 PM, Sam Seigal selek...@yahoo.com wrote:
Will the
On Aug 30, 2011, at 2:47 AM, Andrew Purtell wrote:
Better to focus on improving HBase than play whack a mole.
Absolutely. So let's talk about improving HBase. I'm speaking here as someone
who has been learning about and experimenting with HBase for more than six
months.
HBase supports
On Tue, Aug 30, 2011 at 10:42 AM, Joe Pallas joseph.pal...@oracle.com wrote:
On Aug 30, 2011, at 2:47 AM, Andrew Purtell wrote:
Better to focus on improving HBase than play whack a mole.
Absolutely. So let's talk about improving HBase. I'm speaking here as
someone who has been learning
Hi Chris,
Would you mind if I paraphrase your responses on StackOverflow?
Go right ahead.
Best regards,
- Andy
Problems worthy of attack prove their worth by hitting back. - Piet Hein (via
Tom White)
From: Chris Tarnas c...@email.com
To: Andrew
Hi Joe,
HBase supports replication between clusters (i.e. data centers).
That’s
… debatable. There's replication support in the code, but
several
times in the recent past when someone asked about it on this
mailing
list, the response was “I don't know of anyone actually
using it.”
I haven't gotten many responses so far. If there doesn't seem to be
much interest, I may not spend the time to organize.
If you're feeling too busy to answer the full survey, feel free to
just reply with a +1 so I know there's some interest!
-Todd
On Fri, Aug 26, 2011 at 3:33 PM, Todd Lipcon
+1
On Tue, Aug 30, 2011 at 11:21 PM, Todd Lipcon t...@cloudera.com wrote:
I haven't gotten many responses so far. If there doesn't seem to be
much interest, I may not spend the time to organize.
If you're feeling too busy to answer the full survey, feel free to
just reply with a +1 so I know
+1
2011/8/31 Todd Lipcon t...@cloudera.com:
I haven't gotten many responses so far. If there doesn't seem to be
much interest, I may not spend the time to organize.
If you're feeling too busy to answer the full survey, feel free to
just reply with a +1 so I know there's some interest!
Will the write call to HBase block until the record written is fully
replicated ?
At the HDFS layer, hflush on the write ahead log will block until the data is
fully replicated.
At the HBase layer, whether the writer (client) will be blocked until HDFS
layer actions complete depends on your
+1
Sent from my iPhone
On Aug 30, 2011, at 9:21 PM, Todd Lipcon t...@cloudera.com wrote:
I haven't gotten many responses so far. If there doesn't seem to be
much interest, I may not spend the time to organize.
If you're feeling too busy to answer the full survey, feel free to
just reply
Will the write call to HBase block until the record written is fully
replicated ?
no. data isn't written to disk immediately
Not so black and white.
Full replication in HDFS != writes to disk. Full replication is acknowledgement
there are replicas at all DataNodes in the pipeline, and with
Hi Jean,
I will try to explain more clearly. I have 2 cluster each single node Hadoop
and Hbase cluster. I can create tables and perform other operation of Hbase in
both the cluster individually. Now I wanted to copy a table from 1 cluster (say
A) to other cluster (say B).
In both the
Most of your points are dead-on.
Cassandra is no less complex than HBase. All of this complexity is
hidden in the sense that with Hadoop/HBase the layering is obvious --
HDFS, HBase, etc. -- but the Cassandra internals are no less layered.
Operationally, however, HBase is more complex.
If you use N=3, W=3, R=1 in Cassandra, you
should get similar behavior
to HBase/HDFS with respect to consistency
and availability
My understanding is that R=1 does not guarantee that you won't see
different versions of the data in different reads, in some scenarios. There
was an
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