> 1) As I understand column family internally represents a file , but in my
> case I enter nothing to the column family ( actually I enter empty
> qualifier:value pairs).
> I can't find any details about how rowkeys is stores. Any information
> about storing rowkeys will be very helpful.
Right
No problem. Still trying to get a handle on when it happens.
There is no error, and the results seem valid. There are just not
enough of them. Would packet fragmentation/truncation cause errors or
corruption?
P
On 3/23/12 2:49 PM, lars hofhansl wrote:
Sorry... Distracted by trying to d
Hi ,
I my case hbase table has only row key.
The way I add a record to hbase is:
.
Put put = new Put(keyBytes);
put.add(Bytes.toBytes(familyName) , HConstants.EMPTY_BYTE_ARRAY ,
HConstants.EMPTY_BYTE_ARRAY);
..
My questions is about internal implementation
Yes im following the same document '
http://hbase.apache.org/book/quickstart.html'. i see following errors in
the log. im copying parts of the log file here
txntype:-1 reqpath:n/a Error Path:/hbase/root-region-server
Error:KeeperErrorCode = NoNode for /hbase/root-region-server
RecoverableZooKeeper
On Fri, Mar 23, 2012 at 12:22 PM, balachandra maddina
wrote:
> Hi Harsh,
>
> Thank you for the reply. when i checked the page im seeing following
> details for regionservers
>
That looks right.
Creating a table, it just hangs? It never timesout? What do the logs
for the master say? (See unde
Hi Harsh,
Thank you for the reply. when i checked the page im seeing following
details for regionservers
Region Servers
Dead Region Servers
ServerName
localhost,42063,1332493190942
Total: servers: 1
Regions in Transition
No regions in transition.
Does this indicate that there is a problem w
Have you ensured your HBase RegionServers are all up, and reporting on
the HBase Master Web UI (MasterHost:60010)?
On Sat, Mar 24, 2012 at 12:02 AM, balachandra maddina
wrote:
> HI There,
>
> Im experimenting with 'hbase' and going through wiki document, part of
> the document says use the ( cre
Sorry... Distracted by trying to do a 0.94rc.
VPN... Hmm... Do you see any packet fragmentation/truncation?
-- Lars
- Original Message -
From: Peter Wolf
To: user@hbase.apache.org; lars.geo...@gmail.com; lars hofhansl
Cc:
Sent: Thursday, March 22, 2012 6:01 PM
Subject: Re: Confirmin
Speculative execution is on by default.
http://hbase.apache.org/book.html#mapreduce.specex
On 3/23/12 8:04 AM, "Peter Wolf" wrote:
>Hi Michel,
>
>I agree it doesn't make sense, but then I believe we are tracking a bug.
>
>I don't know about speculative execution, but I certainly did not sw
Hi Michel,
I agree it doesn't make sense, but then I believe we are tracking a bug.
I don't know about speculative execution, but I certainly did not switch
it on.
I am just counting the number of rows that come back in the Result.
If you are interested in this, try my Unit test. I'd be ver
Thanks for your quick repy. I am quite new in this field so:
1) I don't understand quite well what you mean, do you mean that is not
optimal the configuration? I have also this in hbase:
hbase.client.scanner.caching
100
hb
Peter, that doesnt make sense.
I mean I believe you in what you are saying, but don't see how a VPN in would
cause this variance in results.
Do you have any speculative execution turned on?
Are you counting just the numbers of rows in the result set, or are you using
counters in the map reduc
1) your configuration is sub optimal so toss performance out the window. You
appear to be on vms. Toss performance out the window.
2) sounds like you are picking up the default value and not your cluster's
config.
Sent from a remote device. Please excuse any typos...
Mike Segel
On Mar 23, 201
Your logs still point to a permissions issue on /hbase, so I would start at
resolving that first thing..
org.apache.hadoop.hbase.util.ServerCommandLine.doMain(ServerCommandLine.java:76)
at org.apache.hadoop.hbase.master.HMaster.main(HMaster.java:1602)
*Caused by: org.apache.zookeeper.KeeperExce
Hello,
I have been experimenting some problems with the fully distributed version.
First of all I'll tell you my configuration:
I have 4 servers(server_{1,2,3,4}) with 6GB Ram and 2 cores. I installed
hadoop in all of them, this is the configuration:
- server_1 is namenode, datanode and secondary
Have you followed http://hbase.apache.org/book.html#hadoop to the
word, even on your client installations? What you may be running into
is a simple mismatch of hadoop versions in your client and server
installations.
On Fri, Mar 23, 2012 at 1:48 PM, kamal-hbase-haddop-new
wrote:
> am trying to s
am trying to set up a hbase cluster
which is running on top of a hadopp cluster.
Both clusters are up and running but
when i try to create a table in Hbase
client..am seeing the following error in the logs!!
compute-0-11 : is the name node for the hadoop cluster.
2012-03-18 01:18:54,696 WARN
Also, the latency on requests is extremely long. If we group them into
sets of 10 puts(128-256 bytes each) before flushing the client table,
latency is over 1 second.
We get entries like this in our logs:
22:17:51,010 WARN org.apache.hadoop.ipc.HBaseServer:
(responseTooSlow):
{"processingtimems":1
Status update:
- We moved to cdh 4b1, so hbase 0.92 and hdfs 0.23(until now we were
using 0.20.2 series)
- Did the tests now with 256/512 regions, the numbers do appear to
scale which is good.
BUT, our write throughput has gone in the dump. If we disable wal
writes, we still get nearly 40,000 a s
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