For the NPE that you got, is the same HTable instance shared by different
threads. This is a common problem users encounter while using HTable across
multiple threads.
Pls check and ensure that the HTable is not shared.
Regards
Ram
> -Original Message-
> From: Naveen [mailto:naveen.moorj
Hi Dan,
I'm actually trying to simulate the kind of load we're expecting on
production servers(the intention is not to migrate data), hence a
self-written program over sqoop. (PS: I've actually tried sqoop)
Warm regards,
Naveen
-Original Message-
From: Dan Han [mailto:dannahan2...@gmail.
Thank you for the quick response Paul. I've switched off the autoFlush
(haven't increased the writebuffer though). And the splits are pretty
effective, I think because of the similar number of requests each region
gets before they split further.
As per your suggestion, I tried the same task two mo
Can you try with bloom filters? This can help in get()
-Anoop-
From: Jonathan Bishop [jbishop@gmail.com]
Sent: Wednesday, September 26, 2012 11:34 AM
To: user@hbase.apache.org
Subject: Tuning HBase for random reads
Hi,
I am running hbase-0.92.1 and hav
On Tue, Sep 25, 2012 at 7:50 PM, Xiang Hua wrote:
> Hi,
>As we know CDH could be used freely.
>quesiton : can CDH be used for our custom? is it legal or not.
>
Its Apache licensed. This article is pretty good on what that means:
http://en.wikipedia.org/wiki/Apache_license
St.Ack
Hi
Can u share more details pls? What work you are doing within the CPs
-Anoop-
From: Dan Han [dannahan2...@gmail.com]
Sent: Wednesday, September 26, 2012 5:55 AM
To: user@hbase.apache.org
Subject: Distribution of regions to servers
Hi all,
I am doing
On Tue, Sep 25, 2012 at 9:02 PM, Yusup Ashrap wrote:
> Hi Otis thanks for reply,
> servers are identical in terms of hardware, jvm.
> right now I cannot afford to restart my any machines, it's in the
> production environment :D.
> I will give a shot for some other clusters some time later.
>
Wha
Hi Otis thanks for reply,
servers are identical in terms of hardware, jvm.
right now I cannot afford to restart my any machines, it's in the
production environment :D.
I will give a shot for some other clusters some time later.
On Wed, Sep 26, 2012 at 11:50 AM, Otis Gospodnetic <
otis.gospodne...
Hi Dan
Generally if the region distribution is not done properly as per the need
then always we end up in region server getting overloaded due to region
hotspotting.
Write thro put can go down. It is not like the coprocessor performance
alone is slow.
Please check if the regions are properly ba
Hi Naveen,
There is tool called Sqoop which supports importing the data from
relational database to HBase.
https://blogs.apache.org/sqoop/entry/apache_sqoop_graduates_from_incubator
Maybe it can help you migrate the data easily.
Best Wishes
Dan Han
On Mon, Sep 24, 2012 at 9:20 AM, Paul Mackl
It's not compatible. Like the guide says[1]:
"replace your hbase 0.90.x with hbase 0.92.0 binaries (be sure you
clear out all 0.90.x instances) and restart (You cannot do a rolling
restart from 0.90.x to 0.92.x -- you must restart)"
This includes the client.
J-D
1. http://hbase.apache.org/book.
Hi,
We recently upgraded hbase 0.90.4 to HBase 0.92. Our HBase app worked fine in
hbase 0.90.4.
Our new setup has HBase 0.92 server and hbase 0.90.4 client. And throw
following exception when client would like to connect to server.
Is anyone running HBase 0.92 server and hbase 0.90.4 client
Before you do this (or delete the ZK data), can you take a jstack (just run
jstack ) and send us the output?
(Please use http://pastebin.com/ and only send a link to the mailing list).
Thanks.
-- Lars
- Original Message -
From: Dhaval Shah
To: user@hbase.apache.org
Cc:
Sent: Tuesday
Hi Ramasubramanian,
By default, the rowkey is supposed to be the first column. However, you
can write a custom mapper and use it with bulk loader to user other columns
as Rowkey.
Have a look at this link for some more info:
http://hbase.apache.org/book/ops_mgt.html#importtsv
HTH,
Anil Gupta
On
Increment is slightly more expensive, since the RegionServer executing the
Increment needs to retrieve the old value(s) first (while holding the row lock).
-- Lars
- Original Message -
From: Shrijeet Paliwal
To: user@hbase.apache.org
Cc:
Sent: Tuesday, September 25, 2012 10:02 AM
Sub
On Tue, Sep 25, 2012 at 9:56 AM, Pamecha, Abhishek wrote:
> Hi Shrijeet
>
> What's your usecase? That should drive your decision. Put will overwrite
> in case your userid and ip address is same. Increment would just bump up
> the counter.
>
#1 Keep a list of distinct IPs
#2 Counts per IP (only i
Hi Shrijeet
What's your usecase? That should drive your decision. Put will overwrite in
case your userid and ip address is same. Increment would just bump up the
counter.
-abhishek
-Original Message-
From: Shrijeet Paliwal [mailto:shrij...@rocketfuel.com]
Sent: Tuesday, September
Hi,
Should rowkey be always the first column of the upload file? If not can
someone pls let me know how to define it?
Regards,
Rams
Hi,
Suppose I am tracking user activity by storing his IP each time he hits the
web service. The row id will be uid of user and column qualifiers will be
IPs themselves. I am contemplating whether to use a Put or Increment API.
The must have requirement is distinct IPs associated with the user. It
Try killing the old process manually ( ps -ef )
--
On Tue 25 Sep, 2012 11:28 AM IST iwannaplay games wrote:
>Hi,
>
>My hbase was working properly.But now it shows two instances of
>hregionserver , the starting time of one is of 4 days back.If i try
>stopping hbase i
Hi Anoop,
Thanks Anoop.
I am creating the splits using the hex split example in the HBase
documentation. I am specifically passing the splits during table creation. The
leading zeros were lost in pasting from some of the key ranges as the
spreadsheet took them to be numbers while assumed the o
Hi
There is a util class Bytes available in HBase and there is toBytes(int) using
which u can convert an int to byte[]
In the split keys why leading zeros for some region keys? How you have made the
splits? U have passed explicitely the splits or splitkey creation done by HBase
code? How you hav
Hi All,
HBase has a filter called MultipleColumnPrefixFilter which behaves like
ColumnPrefixFilter but allows specifying multiple prefixes.
Example: Find all columns in a row and family that start with "abc" or "xyz".
However i could not find any filter which can return all columns in a row that
Hi Pankaj
If your threads are generating data (0..9, 10...19,
20...29, ...) of this format, your splits also should be like
0.1
1...2
2...3 and so on right? May be am missing something here.
But the data generation that creates the rowkey and the pre s
The zookeeper installation has a dataDir configuration in zoo.cfg. By
default it comes in the /tmp directory.
Regards
Ram
> -Original Message-
> From: iwannaplay games [mailto:funnlearnfork...@gmail.com]
> Sent: Tuesday, September 25, 2012 11:45 AM
> To: user@hbase.apache.org
> Subject: R
"Apache MRUnit ™ is a Java library that helps developers unit test Apache
Hadoop map reduce jobs."
That is every kind of mapper and reducer can be tested with it. That is to
say, there is no specific support of HBase.
If you can manage by yourself to provide the key/value that you should
received
Please find attached the table split and the snapshot below.
Start Key End Key
19
19 32
32 004b
004b64
64 007d
007fff
27 matches
Mail list logo
