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From registrat...@circle-cross-jn.com
Subject Re: HBASE -- YCSB ?
Date Mon, 09 Jul 2012 21:56:21 GMT

	 Is there a "debug" flag I can use with hbase shell that will tell
me the name it's trying to resolve?

	Thank you


	Jay Wilson 

----- Original Message -----
To:"user@hbase.apache.org" , "registration@circle-cross-jn.com" 
Sent:Tue, 10 Jul 2012 05:36:44 +0800 (SGT)
Subject:Re: HBASE -- YCSB ?

 This exception is generally caused when one of your server names
returned does not map to a valid IP address on that host.. The
services being up or not does not matter but the hostname should
resolve to a valid IP 


 From: "registration@circle-cross-jn.com [1]" 
 To: user@hbase.apache.org [2] 
 Sent: Monday, 9 July 2012 5:30 PM
 Subject: Re: HBASE -- YCSB ?

      Thank you Amandeep for your input.

     I go into "hbase shell" to create a table from my
HMaster, which
 isn't running a DN process and I get the following.  Could this
 caused by a number of my DNs being offline, by the fact that the
 isn't running a DN process, or something else?

     hbase(main):013:0> create 'usertable', 'testcol'

 ERROR: java.net.NoRouteToHostException: [3]
java.netNoRouteToHostException: [4] No route to host

 Here is some help for this command:
 Create table; pass table name, a dictionary of specifications per
 column family, and optionally a dictionary of table configuration.
 Dictionaries are described below in the GENERAL NOTES section.

 hbase> create 't1', {NAME => 'f1', VERSIONS => 5}
 hbase> create 't1', {NAME => 'f1'}, {NAME => 'f2'}, {NAME => 'f3'}
 hbase> # The above in shorthand would be the following:
 hbase> create 't1', 'f1', 'f2', 'f3'
 hbase> create 't1', {NAME => 'f1', VERSIONS => 1, TTL => 2592000,
 BLOCKCACHE => true}
 hbase> create 't1', 'f1', {SPLITS => ['10', '20', '30', '40']}
 hbase> create 't1', 'f1', {SPLITS_FILE => 'splits.txt'} [5]

     I can see in the ZK logs and the RS logs that they talk
to the
 shell, so I know that communication is good and I find no errors or
 exceptions in them.

     Also I can do a hbase shell status, hbase shell
zk_dump, and hadoop
 dfsadmin -report all from the node I am trying to create the table
 from with no issue.

     If I get on a node with the DataNode process running on
it and try,
 I get the following:

     [hadoop@srack0-11 ~]$ hbase shell
 HBase Shell; enter 'help' for list of supported commands.
 Type "exit" to leave the HBase Shell
 Version 0.90.6-cdh3u4, r, Mon May 7 13:14:00 PDT 2012

 hbase(main):001:0> status
 3 servers, 0 dead, 0.6667 average load

 hbase(main):002:0> create 'usertable', 'tempcol'

 ERROR: java.io.IOException: [6] java.io.IOException: [7] Bad connect
ack with
 firstBadLink as

     I assume this means it is trying to talk to a DN
process on a node
 that I know is down.


     Jay Wilson

 ----- Original Message -----
 From: user@hbase.apache.org [8]
 Sent:Mon, 9 Jul 2012 12:21:22 -0700
 Subject:Re: HBASE -- YCSB ?


 On Monday, July 9, 2012 at 12:17 PM,
registration@circle-cross-jn.com [9] [1] wrote:

 > Now that I have a stable cluster, I would like to use YCSB to test
 > its performance; however, I am a bit confused after reading
 > different website posting about YCSB.
 > 1) Be default will YCSB read my hbase-site.xml [10] [2] file or do
 have to
 > copy it into the YCSB conf directory? I plan on using on of my
 > with no Hadoop/HBASE processes running on it, but it has all the
 > environmental stuff in place.

 You have to put the hbase-site.xml [11] [3] in

 > 2) Does the hbase.master [12] [4] property have to be site in the
 > hbase-site.xml [13] [5] file for YCSB to work?

 The only property that has to be there is the zookeeper quorum list.
 That's what the HBase client needs to talk to the cluster. 
 > 3) After working through all the workloads is there a script/tool
 > that will clean up my HBase?

 Nope. You'll need to go in and disable, drop the table you wrote
 too. You can do that from the shell.

 disable 'mytable'
 drop 'mytable'

 That's all you'll need to do to clean it up. 
 > Thank You
 > ---
 > Jay Wilson 

 [1] mailto:registration@circle-cross-jn.com [14]
 [2] http://hbase-site.xml [15]
 [3] http://hbase-site.xml [16]
 [4] http://hbase.master [17]
 [5] http://hbase-site.xml [18]

[1] mailto:registration@circle-cross-jn.com
[2] mailto:user@hbase.apache.org
[3] http://java.net.NoRouteToHostException
[4] http://java.netNoRouteToHostException
[5] http://sitemail.hostway.com/http:
[6] http://java.io.IOException
[7] http://java.io.IOException
[8] mailto:user@hbase.apache.org
[9] mailto:registration@circle-cross-jn.com
[10] http://hbase-site.xml
[11] http://hbase-sitexml
[12] http://hbase.master
[13] http://hbase-site.xml
[14] mailto:registration@circle-cross-jn.com
[15] http://hbase-site.xml
[16] http://hbase-site.xml
[17] http://hbase.master
[18] http://hbase-site.xml

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