I did not quite understand what you mean by "row timestamp"? As far as I
know, timestamp is associated to each data version (cell). Will you store
multiple data versions in a single column?
On Thu, Jun 22, 2017 at 4:35 AM, Jean-Marc Spaggiari <
jean-m...@spaggiari.org> wrote:
> Why not using
need to run way bigger and
longer tests. Dont run them in parallete. Run them at least 10 time each
to
make sure you have a good trend. Is the difference between the 2
significant? It should not.
JM
2015-01-19 15:17 GMT-05:00 yonghu yongyong...@gmail.com:
Hi,
Thanks for your
Dear all,
I want to record the user history data. I know there exists two options,
one is to store user events in a single row with multiple data versions and
the other one is to use multiple rows. I wonder which one is better for
performance?
Thanks!
Yong
-01-19 14:28 GMT-05:00 yonghu yongyong...@gmail.com:
Dear all,
I want to record the user history data. I know there exists two options,
one is to store user events in a single row with multiple data versions
and
the other one is to use multiple rows. I wonder which one is better
Hi,
I write a copyTable mapreduce program. My hbase version is 0.94.16. Several
rows in the source table contain multiple data versions. The Map function
looks like follows:
public void map(ImmutableBytesWritable rowKey, Result res, Context context)
throws IOException, InterruptedException{
Hello all,
I want to implement difference operator by using MapReduce. I read two
tables by using MultiTableInputFormat. In the Map phase, I need to tag the
name of table into each row, but how can I get the table name?
One way I can think is to create HTable instance for each table in the
Dear All,
Suppose that I have a key range from 1 to 100 and want to store 1-50 in the
first node and 51-100 in the second node. How can I do this in Hbase?
regards!
Yong
Hello,
Can anyone give me a concrete use case for ttl deletions? I mean in which
situation we should set ttl property?
regards!
Yong
I did not quite understand your problem. You store your data in HBase, and
I guess later you also will read data from it. Generally, HBase will first
check if the data exist in memstore, if not, it will check the disk. If you
set the memstore to 0, it denotes every read will directly forward to
Hi,
If a author does not have hundreds of publications, you can directly write
in one column. Hence, your column will contain multiple data versions. The
default data version is 3 but you can send more.
On Tue, Jul 22, 2014 at 4:20 AM, Ishan Chhabra ichha...@rocketfuel.com
wrote:
Arun,
You
I think the right understanding of this is it will slow down the data query
processing. You can think the RS who hit a heady I/O as a hotspot node. It
will not slow down the whole cluster, it will only slow down the data
applications which access the data from that RS.
On Thu, Apr 3, 2014 at
I think you can define coprocessors to do this. For example, for every put
command, you can keep the desired versions that you want, and later put the
older version into the other table or HDFS. Finally, either let Hbase
delete your stale data or let coprocessor do that for you. The problem of
Hbase uses LSM tree and SStable, not sure for fractal tree
On Fri, Feb 28, 2014 at 2:57 PM, Shahab Yunus shahab.yu...@gmail.comwrote:
http://www.slideshare.net/jaxlondon2012/hbase-advanced-lars-george
http://hortonworks.com/hadoop/hbase/
Regards,
Shahab
On Fri, Feb 28, 2014 at 8:36 AM,
Before you want to trigger major compaction, let's first explain why do we
need major compaction. The major compaction will cause
1. delete the data which is masked by tombstone;
2. delete the data which has expired ttl;
3. compact several small hfiles into a single larger one.
I didn't quite
I also calculated the years of ttl, just for fun. :). But as Jean said,
default ttl is forever.
On Tue, Feb 18, 2014 at 2:05 PM, Jean-Marc Spaggiari
jean-m...@spaggiari.org wrote:
Hi Mohamed,
Default value is MAX_VALUE, which is considered as forever. So default
TTL is NOT 69 years.
Hi,
To process the data in Hbase. You can have different options.
1. Java program using Hbase api;
2. MapReduce program;
3. High-level languages, such as Hive or Pig (built on top of MapReduce);
4. Phoenix also a High-level language (built based on coprocessor).
which one you should use depends
In my opinion, it really depends on your queries.
The first one achieves data locality. There is no additional data transmit
between different nodes. But this strategy sacrifices parallelism and the
node which stores A will be a hot node if too many applications try to
access A.
The second
The question is what you mean of real-time. What is your performance
request? In my opinion, I don't think the MapReduce is suitable for the
real time data processing.
On Fri, Nov 29, 2013 at 9:55 AM, Azuryy Yu azury...@gmail.com wrote:
you can try phoniex.
On 2013-11-29 3:44 PM, Ramon Wang
...@gmail.com wrote:
I logged HBASE-9819 to backport HBASE-8372 'Provide mutability to
CompoundConfiguration' to 0.94
If you have time, you can work on the backport.
Cheers
On Tue, Oct 22, 2013 at 11:56 AM, yonghu yongyong...@gmail.com wrote:
Hi Ted,
This is because I tried
Hello,
In the oldest verison of HBase , I can get the HTableInterface by
HTablePool.getTable() method. However, in the latest Hbase version0.94.12,
HTablePool is deprecated. So, I tried to use HConnectionManager to create
HTableInterface, but it does not work. Can anyone tell me how to create
9.3.1.1.
On Tue, Oct 22, 2013 at 9:37 AM, yonghu yongyong...@gmail.com wrote:
Hello,
In the oldest verison of HBase , I can get the HTableInterface by
HTablePool.getTable() method. However, in the latest Hbase
version0.94.12,
HTablePool is deprecated. So, I tried to use
)
at
org.apache.hadoop.hbase.regionserver.RegionCoprocessorHost.prePut(RegionCoprocessorHost.java:808)
... 9 more
: 1 time, servers with issues: hans-laptop:60020,
On Tue, Oct 22, 2013 at 8:14 PM, yonghu yongyong...@gmail.com wrote:
Ted,
Can you tell me how to dump the stack trace of HBase
to be unmanaged.);
}
Cheers
On Tue, Oct 22, 2013 at 11:14 AM, yonghu yongyong...@gmail.com wrote:
Ted,
Can you tell me how to dump the stack trace of HBase? By the way, I check
the log of RegionServer. It has following error messages:
java.io.IOException: The connection has
Hello,
I saw some descriptions that when data modifications (like Put or Delete)
have already been persistent on disk, the log file will be transfered from
/.log folder to /.oldlogs folder. However, I made a simple test. I first
created a table and inserted several data and then I used flush
in the Cell.
I used two rows, but as you said, the two Cells can be written using one
RPC call.
This way, NetworkSupplier column is not needed.
Cheers
On Fri, Sep 27, 2013 at 3:04 PM, yonghu yongyong...@gmail.com wrote:
To Ted,
--Can you tell me why readings corresponding to different
(1,3,5) are timestamp.
regards!
Yong
On Fri, Sep 27, 2013 at 4:47 PM, Ted Yu yuzhih...@gmail.com wrote:
In {10K:1, 20K:3, 15K:5}, what does the value (1, 3, 5) represent ?
Cheers
On Fri, Sep 27, 2013 at 7:24 AM, yonghu yongyong...@gmail.com wrote:
Hello,
In my understanding
)
-- Lars
From: yonghu yongyong...@gmail.com
To: user@hbase.apache.org
Sent: Friday, September 27, 2013 7:24 AM
Subject: How to understand the TS of each data version?
Hello,
In my understanding, the timestamp of each data version is generated by Put
command
Different from the RDBMS, the data in HBase is stored as key-value pair in
HDFS. Hence, for every data version in a cell, the row key will appear.
On Tue, Sep 17, 2013 at 7:53 PM, Ted Yu yuzhih...@gmail.com wrote:
w.r.t. Data Block Encoding, you can find some performance numbers here:
I think you can take a look at the
http://hbase.apache.org/book/regions.arch.html, it describes the data
storage hierarchy of HBase. Due to the statement of Lars stems from the
fact that HBase flushes by region (which means all stores of that region
are flushed), you can think the limitations of
Hello,
I know if I use default scan api, HBase scans table in a serial manner, as
it needs to guarantee the order of the returned tuples. My question is if I
use MapReduce to read the HBase table, and directly output the results in
HDFS, not returned back to client. The HBase scan is still in a
If I want to use multi-thread with thread safe, which class should I use?
On Thu, Aug 1, 2013 at 3:08 PM, Ted Yu yuzhih...@gmail.com wrote:
HTable is not thread safe.
On Aug 1, 2013, at 5:58 AM, Pavel Hančar pavel.han...@gmail.com wrote:
Hello,
I have a class extending
Use HTablePool instead. For more infor,
http://hbase.apache.org/book/client.html.
On Thu, Aug 1, 2013 at 3:32 PM, yonghu yongyong...@gmail.com wrote:
If I want to use multi-thread with thread safe, which class should I use?
On Thu, Aug 1, 2013 at 3:08 PM, Ted Yu yuzhih...@gmail.com wrote
The ways that you can lose data in my point of views:
1. some tuples share the same row-key+cf+column. Hence, when you load your
data in HBase, they will be loaded into the same column and may exceed the
predefined max version.
2. As Ted mentioned, you may import some delete, do you generate
You can write one MR job to finish this. First read two tables at Map
function, the output key will be the reference key for one table and
primary key for the other table. At the Reduce function, you can join the
tuples which contain the same key. Please note this is a very naive
approach, for
Dear all,
From the HBase reference book, it mentions that when RegionServer splits
regions, it will offline the split region and then adds the daughter
regions to META, opens daughters on the parent's hosting RegionServer and
then reports the split to the Master.
I have a several questions:
1.
of the daughter regions
if continuous write load incurs.
Cheers
On Wed, Jul 17, 2013 at 6:53 AM, yonghu yongyong...@gmail.com wrote:
Dear all,
From the HBase reference book, it mentions that when RegionServer splits
regions, it will offline the split region and then adds the daughter
Hello,
From the reference book 5.8.1.4. Put, if I issue a Put command without
specifying timestamp, the server will generate a TS for me! I wonder if the
server means the master node or regionservers? In my understanding, the
server means the regionserver, as the master will only tells the
I check the latest api of Delete class. I am afraid you have to do it by
yourself.
regards!
Yong
On Wed, Jul 3, 2013 at 6:46 PM, Rahul Bhattacharjee rahul.rec@gmail.com
wrote:
Hi,
Like scan with range. I would like to delete rows with range.Is this
supported from hbase shell ?
Lets
API also..
You can have a look at BulkDeleteEndpoint which can do what you want to
-Anoop-
On Thu, Jul 4, 2013 at 4:09 PM, yonghu yongyong...@gmail.com wrote:
I check the latest api of Delete class. I am afraid you have to do it by
yourself.
regards!
Yong
On Wed, Jul 3, 2013
and the actual execution
will happen at server side.. (This is what will happen with Endpoints :) )
-Anoop-
On Thu, Jul 4, 2013 at 4:29 PM, yonghu yongyong...@gmail.com wrote:
Hi Anoop
one more question. Can I use BulkDeleteEndpoint at the client side or
should I use it like
Hi Lucas,
First, the write request for HBase consists of two parts:
1. Write into WAL;
2. Write into Memstore, when Memstore reaches the threshold, the data in
Memstore will be flushed into disk.
In my understanding, there are two data synchronization points:
The first one is write to WAL. As
Can anyone explain why client + rpc + server will decrease the performance
of scanning? I mean the Regionserver and Tasktracker are the same node when
you use MapReduce to scan the HBase table. So, in my understanding, there
will be no rpc cost.
Thanks!
Yong
On Wed, Jun 5, 2013 at 10:09 AM,
, yonghu yongyong...@gmail.com wrote:
Can anyone explain why client + rpc + server will decrease the
performance
of scanning? I mean the Regionserver and Tasktracker are the same node
when
you use MapReduce to scan the HBase table. So, in my understanding, there
will be no rpc cost
Hello,
I have presented 5 CDC approaches based on HBase and published my results
in adbis 2013.
regards!
Yong
On Mon, Jun 3, 2013 at 11:16 AM, yavuz gokirmak ygokir...@gmail.com wrote:
Hi all,
Currently we are working on a hbase change data capture (CDC) tool. I want
to share our ideas
In this situation, you can set the
property
namehbase.regionserver.
logroll.period/name
value360/value
/property
to a short value, let's say 3000 and then you can see your log file with
current size after 3 seconds.
To Nicolas,
I guess he wants somehow to analyze the HLog.
Dear All,
I wonder how I can set heap size for HBase and what is the suitable
portion compared to whole memory size?
And the other question is that how many memory size I need to give to
Java when I run HBase, as I sometimes got out of memory problems.
Thanks!
Yong
Hello,
I think you can use HBase org.apache.hadoop.hbase.client.Delete class.
It already supported to delete a specific version in a cell, see
public Delete deleteColumn(byte[] family, byte[] qualifier, long
timestamp) method.
regards!
Yong
On Thu, Mar 7, 2013 at 9:25 PM, Jonathan Natkins
Hello Dastgiri,
I don't think HBase can support original nested schema which you want
to define. But you can still store your data in HBase. I figured out
several possible solutions:
1. row_key: profileid + profilename + date, the column will be
monthwiseProfileCount:uk and so on. However, this
Parkash,
I have a six nodes cluster and met the same problem as you had. In my
test, inserting one tuple using coprocessor is nearly 10 times slower
than normal put operation. I think the main reason is what Lars
pointed out, the main overhead is executing RPC.
regards!
Yong
On Mon, Feb 18,
Forget to say. I also tested MapReduce. It's faster than coprocessor.
On Mon, Feb 18, 2013 at 10:01 AM, yonghu yongyong...@gmail.com wrote:
Parkash,
I have a six nodes cluster and met the same problem as you had. In my
test, inserting one tuple using coprocessor is nearly 10 times slower
Hi, Michael
I don't quite understand what do you mean by round trip back to the
client. In my understanding, as the RegionServer and TaskTracker can
be the same node, MR don't have to pull data into client and then
process. And you also mention the unnecessary overhead, can you
explain a little
, at 4:57 AM, yonghu yongyong...@gmail.com wrote:
Hi, Michael
I don't quite understand what do you mean by round trip back to the
client. In my understanding, as the RegionServer and TaskTracker can
be the same node, MR don't have to pull data into client and then
process. And you also mention
7, 2013 at 6:29 PM, Ted Yu yuzhih...@gmail.com wrote:
Can you give us the use case where the scanning order is significant ?
Thanks
On Thu, Feb 7, 2013 at 9:23 AM, yonghu yongyong...@gmail.com wrote:
Dear all,
I wonder if it is possible to indicate the column scan order when
scanning
Thanks for your response. I will take a look.
yong
On Thu, Feb 7, 2013 at 10:11 PM, Ted Yu yuzhih...@gmail.com wrote:
Yonghu:
You may want to take a look at HBASE-5416: Improve performance of scans
with some kind of filters.
It would be in the upcoming 0.94.5 release.
You can designate
I think you can treat id as row key. and address-type/home or
address-type/office as column family. each address can be treated as
column. The thing is how you can transform your json metadata into
Hbase schema information.
regards!
Yong
On Mon, Feb 4, 2013 at 11:28 AM, ranjin...@polarisft.com
mean the normal logging or the WAL logs. Sorry am not
getting your question here.
WAL trigger is for the WAL logs.
Regards
Ram
On Sat, Feb 2, 2013 at 1:31 PM, yonghu yongyong...@gmail.com wrote:
Hello,
For some reasons, I need to analyze the log of hbase. However, the log
version then you have a way to plugin your own
logcleaner class.
'BaseLogCleanerDelegate' is the default thing available. Customise your
logcleaner as per your requirement so that you can have a back up of the
logs.
Hope this helps.
Regards
Ram
On Sat, Feb 2, 2013 at 3:39 PM, yonghu
Dear all,
I read the information of
https://github.com/brianfrankcooper/YCSB/wiki/Running-a-Workload
For example, I can indicate the column family name when I issue the
command line as
java -cp build/ycsb.jar:db/hbase/lib/* com.yahoo.ycsb.Client -load -db
com.yahoo.ycsb.db.HBaseClient -P
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
30, 2012 at 2:04 PM, ramkrishna vasudevan
ramkrishna.s.vasude...@gmail.com wrote:
Hi
Pls check if this issue is similar to HBASE-5897. It is fixed in 0.92.2
as
i see from the fix versions.
Regards
Ram
On Fri, Nov 30, 2012 at 1:13 PM, yonghu yongyong...@gmail.com wrote
Do you check your log infor? As far as I understood, if there is a
major compaction, this event will be recorded in log.
regards!
Yong
On Fri, Nov 30, 2012 at 8:41 AM, Varun Sharma va...@pinterest.com wrote:
Hi,
I turned off automatic major compactions and tried to major compact all
regions
How do you close the major compaction and what hbase version do you use?
On Fri, Nov 30, 2012 at 8:51 AM, Varun Sharma va...@pinterest.com wrote:
I see nothing like major compaction in the logs of the region server or the
master...
On Thu, Nov 29, 2012 at 11:46 PM, yonghu yongyong
I like the illustration of Stack.
regards!
Yong
On Wed, Nov 28, 2012 at 6:56 PM, Stack st...@duboce.net wrote:
On Wed, Nov 28, 2012 at 6:40 AM, matan ma...@cloudaloe.org wrote:
Why does the CF have to be in the HFile, isn't the entire HFile dedicated
to
just one CF to start with (I'm
Hi Rams,
yes. You can. See follows:
hbase(main):001:0 create 'test1','course'
0 row(s) in 1.6760 seconds
hbase(main):002:0 put 'test1','tom','course',90
0 row(s) in 0.1040 seconds
hbase(main):003:0 scan 'test1'
ROW COLUMN+CELL
tom column=course:,
I think you can set setWriteToWAL() method to false to reduce the
amount of log infor. But you may get risks when your cluster is down.
regards!
yong
On Fri, Nov 23, 2012 at 7:58 AM, iwannaplay games
funnlearnfork...@gmail.com wrote:
Hi,
Everytime i query hbase or hive ,there is a significant
a method
3) Use a break point while debugging
The answer to your current problem : o.a.h.mapreduce.Reducer method has no
Iterator parameter but it does have a Iterable parameter...
Regards
Bertrand
PS : It is absolutely not related to HBase.
On Thu, Nov 15, 2012 at 8:42 PM, yonghu yongyong
the coprocessor and
region not online.
Pls check if your META region is online.
Regards
ram
On Sat, Nov 10, 2012 at 8:37 PM, yonghu yongyong...@gmail.com wrote:
Dear All,
I used hbase 0.94.1 and implemented the test example of WAL trigger like:
public class WalTrigger extends
-
From: Kevin O'dell [kevin.od...@cloudera.com]
Sent: Monday, October 22, 2012 5:55 PM
To: user@hbase.apache.org
Subject: Re: A question of storage structure for memstore?
Yes, there will be two memstores if you have two CFs.
On Oct 22, 2012 7:25 AM, yonghu yongyong
From: yonghu yongyong...@gmail.com
To: user@hbase.apache.org
Sent: Friday, August 31, 2012 1:13 PM
Subject: Can I use coprocessor to record the deleted data caused by ttl?
Dear All,
I wonder if I can use coprocessor to record the deleted data caused by
ttl. Any ideas
in memstore. But the question
is that if memstore doesn't have enough size to accept new incoming
ttl data what will happen? Can anybody explain?
Thanks!
Yong
On Wed, Aug 22, 2012 at 10:19 AM, yonghu yongyong...@gmail.com wrote:
I can fully understand normal deletion. But, in my point of view
Sorry for that. I didn't use the right parameter. Now I get the point.
regards!
Yong
On Wed, Aug 22, 2012 at 10:49 AM, Harsh J ha...@cloudera.com wrote:
Hey Yonghu,
You are right that TTL deletions (it isn't exactly a delete, its
more of a compact-time skip wizardry) do not go to the HLog
. They aren't
Deleted in the sense of what a Delete insert signifies, but are
rather eliminated in the write process when new
storefiles are written out - if the value being written to the
compacted store has already expired.
On Tue, Aug 14, 2012 at 8:40 PM, yonghu yongyong...@gmail.com wrote
Hi Harsh,
I have a question of your description. The deleted tag masks the new
inserted value with old timestamp, that's why the new inserted data
can'be seen. But after major compaction, this new value will be seen
again. So, the question is that how the deletion really executes. In
my
My hbase version is 0.92. I tried something as follows:
1.Created a table 'test' with 'course' in which ttl=5.
2. inserted one row into the table. 5 seconds later, the row was deleted.
Later when I checked the log infor of 'test' table, I only found the
inserted information but not deleted
Harsh is right. You find the wrong place.
regards!
Yong
On Sun, Aug 12, 2012 at 1:40 PM, Harsh J ha...@cloudera.com wrote:
Richard,
The property disables major compactions from happening automatically.
However, if you choose to do this, you should ensure you have a cron
job that does
In my understanding of column-oriented structure of hbase, the first
thing is the term column-oriented. The meaning is that the data which
belongs to the same column family stores continuously in the disk. For
each column-family, the data is stored as row store. If you want to
understand the
12, 2012 at 1:15 PM, yonghu yongyong...@gmail.com wrote:
java.lang.RuntimeException: java.lang.ClassNotFoundException:
com.mapreducetablescan.MRTableAccess$MTableReducer;
Does anybody know why?
Its not in your job jar? Check the job jar (jar -tf JAR_FILE).
St.Ack
I think you can also use ifconfig command in the VM to see the ip
address. And then you can change your ip address in /etc/hosts.
Regards!
Yong
On Wed, May 2, 2012 at 7:21 PM, Ben Lisbakken lisba...@gmail.com wrote:
Hello --
I've got a problem where the RegionServers try to connect to
It means that java run time can't find
org/apache/hadoop/hbase/filter/FilterBase class. You have to add the
hbase.jar in your classpath.
regards!
Yong
On Wed, May 2, 2012 at 12:12 PM, cldo datk...@gmail.com wrote:
i want to custom filter hbase.
i created jar file by eclipse, copy to sever
cleans out
delete markers.
Delete markers cannot be removed during a minor compaction since an affected
KeyValue could exist in an HFile that is not part of this compaction.
-- Lars
From: yonghu yongyong...@gmail.com
To: user@hbase.apache.org
Sent: Wednesday
Hello,
My HBase version is 0.92.0. And I find that when I use minor
compaction and major compaction to compact a table, there are no
differences. In the minor compaction, it will remove the deleted cells
and discard the exceeding data versions which should be the task of
major compaction. I
As Lars mentioned, the row is not physically deleted. The way which
Hbase uses is to insert a cell called tombstone which is used to
mask the deleted value, but value is still there (if the deleted value
is in the same memstore with tombstone, it will be deleted in the
memstore, so you will not
yes. You can compile the hadoop jar file by yourself and put into the
Hbase lib folder.
Regards!
Yong
On Mon, Apr 16, 2012 at 2:09 PM, Harsh J ha...@cloudera.com wrote:
While I haven't tried this personally, it should be alright to do. You
need to replace HBase's default hadoop jars (which
Hello,
My hbase version is 0.92.0 and is installed in pseudo-mode. I found a
strange situation of HLog. After I inserted new data value into table,
the volume of HLog is 0. I checked in HDFS.
drwxr-xr-x - yonghu supergroup 0 2012-04-15 17:34 /hbase/.logs
drwxr-xr-x - yonghu
Thanks for your reply. After nearly 60minutes, I can see the Hlog volume.
-rw-r--r-- 3 yonghu supergroup 2125 2012-04-15 17:34
/hbase/.logs/yonghu-laptop,60020,1334504008467/yonghu-laptop%2C60020%2C1334504008467.1334504048854
I have no idea why it takes so long time.
Yong
On Sun, Apr
byte.eventually it moves the log into .oldlogs also.
Thanks
Manish
Sent from my BlackBerry, pls excuse typo
-Original Message-
From: yonghu yongyong...@gmail.com
Date: Sun, 15 Apr 2012 18:58:45
To: user@hbase.apache.org
Reply-To: user@hbase.apache.org
Subject: Re: dump HLog content
Hello,
The description of this method is /** @return the region associated
with this coprocessor */ and the return value is an HRegion instance.
If I configure the region-coprocessor class in hbase-site.xml. It
means that this coprocessor will be applied to every HRegion which
resides on this
help explain things a bit more:
https://blogs.apache.org/hbase/entry/coprocessor_introduction
--gh
On Tue, Apr 10, 2012 at 2:30 AM, yonghu yongyong...@gmail.com wrote:
Hello,
The description of this method is /** @return the region associated
with this coprocessor */ and the return value
Hi Shwan,
My hbase-version is 0.92.0. I have to mention that in recently I
noticed that the delete semantics between shell and Java api are
different. In shell, if you delete one version, it will mask the
versions whose timestamps are older than that version, it means that
scan will not return
.
On Mon, Mar 19, 2012 at 7:31 AM, yonghu yongyong...@gmail.com wrote:
Hello,
I used the $ ./bin/hbase org.apache.hadoop.hbase.regionserver.wal.HLog
--dump command to check the HLog information. But I can not find any
data information. The output of my HLog file is looks like follows
Thanks for your response.
Regards!
Yong
On Sat, Mar 17, 2012 at 10:09 PM, Stack st...@duboce.net wrote:
On Sat, Mar 17, 2012 at 1:06 AM, yonghu yongyong...@gmail.com wrote:
Hello,
I have used the command ./hbase
org.apache.hadoop.hbase.mapreduce.Export 'test'
http://localhost:8020/test
the command line. I want to know that why
its code dose not work?
Regards!
Yong
On Fri, Mar 16, 2012 at 5:50 PM, yonghu yongyong...@gmail.com wrote:
Thanks for your information.
Regards!
Yong
On Fri, Mar 16, 2012 at 5:39 PM, Stack st...@duboce.net wrote:
On Fri, Mar 16, 2012 at 9:01 AM, yonghu
I noticed the problem is that somehow I lost the data from hdfs. The
code is ok.
Regards!
Yong
On Fri, Mar 16, 2012 at 5:59 PM, yonghu yongyong...@gmail.com wrote:
I implemented the code like this way. My Hbase version is 0.92.0.
Configuration conf = new Configuration
Thanks for your reply. But I am using hbase 0.90.2. There is no
HFileWriterV2 class. Can you show me how to use HFileWriter
constructor?
Thanks
Yong
On Tue, Mar 6, 2012 at 3:19 PM, Konrad Tendera kon...@tendera.eu wrote:
yonghu yongyong313@... writes:
Hello,
...
try something like
Thanks for your reply. I have already solve the problem.
Yong
On Tue, Mar 6, 2012 at 5:02 PM, Stack st...@duboce.net wrote:
On Tue, Mar 6, 2012 at 6:48 AM, yonghu yongyong...@gmail.com wrote:
Thanks for your reply. But I am using hbase 0.90.2. There is no
HFileWriterV2 class. Can you show me
= new HFile.Writer(fs, new
Path(hdfs://localhost:8020/test), 2, (Compression.Algorithm)null,
null);
the data is stored in the hdfs.
regards!
Yong
On Tue, Mar 6, 2012 at 5:10 PM, Stack st...@duboce.net wrote:
On Tue, Mar 6, 2012 at 8:07 AM, yonghu yongyong...@gmail.com wrote:
Thanks for your
Hello,
One HFile consists of many blocks. Suppose we have two blocks, b1 and
b2. The size of each block is 2K. In b1, we have two key-value pairs,
whose keys are t1 and t2, separately. Each key-value pair is 1K. So
the b1 is full. Suppose that now we insert a new tuple which key is
also t1. The
Hello,
My HBase version is 0.90.2 and installed in pseudo mode. I have
successfully inserted two tuples in the 'test' table.
hbase(main):005:0 scan 'test'
ROWCOLUMN+CELL
jim column=course:english,
timestamp=1330949116240, value=1.3
tom
is the first region in a table. If region has both an empty start
and an empty end key, its the only region in the table
On 3/5/12 7:27 AM, yonghu yongyong...@gmail.com wrote:
Hello,
My HBase version is 0.90.2 and installed in pseudo mode. I have
successfully inserted two tuples in the 'test' table
Hello,
I read some articles which mention before the client connect to the
master node, he will first connect to the zookeeper node and find the
location of the root node. So, my question is that the node which
stores the root information is different from master node or they are
the same node?
1 - 100 of 115 matches
Mail list logo
