Re: issue about snapshot migration

tml#d0e1440 > > Cheers > > On Wed, Oct 22, 2014 at 6:34 PM, ch huang wrote: > > > hi,maillist: > > > >i have two hbase cluster ,one is version 0.94.6 another is 0.98.1 > ,i > > try to mv data of table A from 0.94.6 to 0.98.1 ,i make the snapshot

issue about snapshot migration

hi,maillist: i have two hbase cluster ,one is version 0.94.6 another is 0.98.1 ,i try to mv data of table A from 0.94.6 to 0.98.1 ,i make the snapshot of A ,then want to use ExportSnapshot to mv snapshot to hdfs cluster which hbase 0.98.1 on,but failed ,why? # hbase org.apache.hadoop.hbase

Re: can not enable snapshot function on hbase 0.94.6

> -Original Message- > From: ch huang [mailto:justlo...@gmail.com] > Sent: 17 October 2014 12:02 > To: user@hbase.apache.org > Subject: can not enable snapshot function on hbase 0.94.6 > > hi，maillist ： > i installed CDH4.4 with hbase version 0.94.6 ,(no cloude

Re: issue about migrate hbase table from 0.94 to 0.98

On Oct 17, 2014, at 1:59 AM, ch huang wrote: > > > thanks for reply ,i want to copy some selected table , not whole cluster > , > > > > On Fri, Oct 17, 2014 at 4:46 PM, Ted Yu wrote: > > > >> Can you give a bit more detail ? > >> >

Re: issue about migrate hbase table from 0.94 to 0.98

thanks for reply ,i want to copy some selected table , not whole cluster , On Fri, Oct 17, 2014 at 4:46 PM, Ted Yu wrote: > Can you give a bit more detail ? > > Are you migrating whole cluster or just selected tables ? > > Cheers > > On Oct 16, 2014, at 10:48 PM, ch h

can not enable snapshot function on hbase 0.94.6

hi，maillist ： i installed CDH4.4 with hbase version 0.94.6 ,(no cloudera manager involved) but when i test snapshot function ,i get error like this ,acturally , i add the following info into my /etc/hbase/conf/hbase-site.xml (each node) ,and restart hbase cluster,still same error,anyone k

issue about migrate hbase table from 0.94 to 0.98

hi，maillist: how can do do data migrate from hbase 0.94 to 0.96 ,copy file from old hadoop cluster to new hadoop cluster is OK ,any one can help me?

issue about importtsv tool bulk output function

hi,maillist: i view the code of importTsv in hbase 0.96, when it do bulk output ,it still use HFileOutputFormat not HFileOutputFormat2 ,however ,in hbase 0.96 ,it dose not support HFileV1, Is it a bug of importTsv ?

issue about testing importtsv with other field separator

hi,maillist: i test hbase 0.96.1.1 importtsv tool ,find it do not work with non tab field separator # sudo -u hdfs hbase org.apache.hadoop.hbase.mapreduce.ImportTsv -Dimporttsv.columns=HBASE_ROW_KEY,myco1,mycol2 "-Dmporttsv.separator=|" alex:mymy2 /tmp/alex_test 2014-07-22 15:55:59,746 INFO [m

issue about import hbase table data to different namespace

hi,maillist: i try import data to 0.96 hbase ,but when i use import tool ,it can import data to default namespace, how can i import it to diffent namespace?

Issure about hbase0.96.1.1 jar package in remote maven repo

hi, i use nexus maven repo manager ,and recently i upgrade my hbase cluster to 0.96.1.1 cdh5.0.2 but i checked the remote maven repo https://repository.cloudera.com/artifactory/cloudera-repos/org/apache/hbase/hbase/0.96.1.1-cdh5.0.2/ , no hbase jar file ,why ,where i can find it?

run update to 0.96 hbase script error

hi，maillist： I want to move my 0.94 hbase table to 0.96 ,and i use distcp move all data to new hbase 0.96 cluster,when i run " sudo -u hbase hbase upgrade -execute " i get error ,why? 2014-07-11 15:36:37,524 INFO [main] zookeeper.ZooKeeper: Client environment:java.library.path=/usr/lib/h

How to move table data from hbase 0.94 to 0.96 use ReplicationBridgeServer?

hi,mailist: i want to move data from hbase 0.94 to 0.96 ,someone told me ReplicationBridgeServer can do this, i do it use the following process download code from https://github.com/hortonworks/HBaseReplicationBridgeServer compile& assembly mvn clean install -DskipTests mvn assembly:singl

how to move hbase table data between diffent version hbase?

hi,maillist: i have two hbase envionment , one is 0.94 based on cdh4.4 ,another is 0.96 based on chd5,i want to move 0.94 table data to 0.96 ,how can i do it? i see doc say hbase 0.96 do a lot of change,it do not compatible with 0.94

what differenct between znode /hbase/table94 and /hbase/table?

hi,maillist: i see table94 and table znode under /hbase znode,what's difference between them? i see no znode under /hbase/table

can two hbase cluster share same zookeeper

hi,maillist: i have two hbase cluster , use same zookeeper cluster ,but the program is always connect to the old cluster ,not new ,even i changed hbase-site.xml file

issue about two hbase on same hadoop cluster

hi,maillist: i have A ,B,C,D,E,F six boxes, A,B,C installed zookeeper and i installed hdfs on all six boxes,A (NN) ,B,C,D,E,F(DN) i installed old hbase cluster on A,B,C A hbase-master B hbase-regionserver C hbase-regionserver for some reason ,i stoped the hbase cluster ,and insta

hbase export very slow

hi,mailist: i use hbase export tool export hbase data to HDFS,but it very slow,the first 4map finished in 1min ,but the fifth map task run 35min before it finished ,why?

how to calculate all the number of store file on hbase all table ?

hi maillist: i want to campare the number of store file before and after minor compaction ,but how can i calculate number of store file first?

what difference between hdfs balance and hbase balance operation?

hi,maillist: i am very confuse about this,anyone can help me?

what different between delete and deleteall in hbase shell?

hi,maillist: any difference between the following two command in hbase shell? *deleteall ‘t1′, ‘r1′, ‘c1′, ts1 * * delete ‘t1′, ‘r1′, ‘c1′, ts1*

can not modify configuration in hbase shell

hi ,mailist: i try to modify a column family configuration use alert table command ,but failed ,why? hbase(main):005:0> create 'alex_test', {NAME => 'f1', CONFIGURATION => {'hbase.hstore.blockingStoreFiles' => '10'} hbase(main):006:1> } NameError: uninitialized constant CONFIGURATION

Re: how to calculate key length in hbase?

gt; > Cheers > > > On Wed, May 21, 2014 at 6:57 PM, ch huang wrote: > > > hi,maillist: > > i observe command " hbase hfile -m -f > > > > > /hbase/pipe_url/da8687017e0d5ef0a274153426127ef3/info/9efda5a9f07e47248af4e998b42afafd" > > o

how to calculate key length in hbase?

hi,maillist: i observe command " hbase hfile -m -f /hbase/pipe_url/da8687017e0d5ef0a274153426127ef3/info/9efda5a9f07e47248af4e998b42afafd" output ,and i do not know how to calculate the key length, it's say firstKey=2-F9150DB8A200991BCCA59B5D4E554181/info:url/1400052220386/Put and avgKey

Re: how to get the number of total rows of a table

it is run as a MR job On Thu, May 22, 2014 at 8:54 AM, Jean-Marc Spaggiari < jean-m...@spaggiari.org> wrote: > Is it correctly kicking the MR job? Or is it running local only? If former, > then it's perfect! > > > > 2014-05-21 20:51 GMT-04:00 ch huang : > >

Re: how to get the number of total rows of a table

i use this command ,it works fine # hbase org.apache.hadoop.hbase.mapreduce.RowCounter dsp_cookie_mapping On Thu, May 22, 2014 at 8:44 AM, ch huang wrote: > # sudo -u hbase hadoop jar /usr/lib/hbase/hbase.jar rowcounter > -Dmapred.map.tasks.speculative.execution

Re: how to get the number of total rows of a table

base.client.scanner.caching=100 work_proposed > > JM > > > 2014-05-21 7:07 GMT-04:00 ch huang : > > > hi,maillist: > >i use count 'table' in hbase shell,but it very slow,how can i > > get rows of a table quickly? > > >

how to get the number of total rows of a table

hi,maillist: i use count 'table' in hbase shell,but it very slow,how can i get rows of a table quickly?

issue about Can not resolve hostname when export hbase table data

hi,mailist: when i use export command to export hbase table ,i get the following info ,but i check each node /etc/hosts file ,the content is cat /etc/hosts 192.168.11.11 ch11 192.168.11.10 ch10 192.168.11.12 ch12 192.168.11.13 ch13 192.168.11.14 ch14 192.168.11.15 ch15 192.168.11.18 ch18 192.168

Inconsistent configuration. Previous configuration for using table name in metrics: true, new configuration: false

hi,maillist: i try check content of storefile use HFile tool,but i get error ,anyone know how to fix it? i use hbase-0.94.6. # hbase org.apache.hadoop.hbase.io.hfile.HFile -v -f /hbaseroot/monitor_cookie/7d92d877b470e3b5e0e6a8c55a80c6bd/info/b38124cd1a9441af8af7771c3da4357d 14/04/09 11

issue about "failed to move out of transition within timeout 120000ms"

hi,maillist: hi ,when i check hbase use hbck ,i find 3 inconsistent ,so i use -repair option to fix it ,but get the following error ,anyone know how to handle this? 3ed95_1396634339085,1396647514974.ffa8948e67909192db20a889cbcc7fac.', STARTKEY => '20140405_10_001_20_93889f73fab14378a5ae8

issue about remove region

hi,maillist : i use following process to clean hbase old data region, 1, remove region info from .META. table 2, remove region directory from HDFS but when i recheck use http://192.168.10.22:60010/master-status ,i find the region number is not decrease,why?

how to clean table data before one week ago?

hi,maillist: i try to clean hbase table data before one week ,by setting column family TTL to 86400*7 ,but it seems no use,any other way can clean data automatically?

after drop big hbase table,how can i retrieve disk space immediately

hi,maillist: whe i drop a big hbase table ,how can i retrieve disk space immediately ?

Re: hbase regionserver all dead

is2...@gmail.com> wrote: > Regards, ch huang. > Which version of HBase are you using? > Please, check the following things: > - zookeeper session timeout > - zookeeper ticktime > - hbase.zookeeper.property.maxClientsCnxns (default 35) > - ulimit > - increase the quant

Re: hbase regionserver all dead

Valmaseda < marcosluis2...@gmail.com> wrote: > Regards, ch huang. > Which version of HBase are you using? > Please, check the following things: > - zookeeper session timeout > - zookeeper ticktime > - hbase.zookeeper.property.maxClientsCnxns (default 35) > - ulimit > -

hbase regionserver all dead

hi,maillist: this morning i check my hbase cluster log,and find all region server down ,i do not know why,hope some expert can show me some clue, here is the log which i find in the first death happened node 2014-03-03 17:16:11,413 DEBUG org.apache.hadoop.hbase.io.hfile.LruBlockCache: S

Re: all my regionserver appear that numberOfOnlineRegions=0,what's that mean?

to know: > 1) what HBase version are you using; > 2) what are the tables you have (size, def, etc.) > 3) What is the balancer configured on you cluster; > 4) What's in the logs? > > Thanks, > > JM > Le 2013-12-09 04:15, "ch huang" a écrit : > > >

all my regionserver appear that numberOfOnlineRegions=0,what's that mean?

hi,maillist: i find that all my regionserver ,the load is numberOfOnlineRegions=0 ,how to solve this ? Region Servers ServerName Start time Load CHBM221,60020,1385794959174 Sat Nov 30 15:02:39 CST 2013 requestsPerSecond=0, numberOfOnlineRegions=0, usedHeapMB=95, m

what's different between numberOfStores and numberOfStorefiles in region status variables

hi all: i check the region server status though http://IP:60030/rs-status and see for some region ,the two variables is not always same,i wonder that what's different between them? numberOfStores=1, numberOfStorefiles=3

Re: how to export data from hbase to mysql?

ean-Marc Spaggiari > wrote: > > > Take a look at sqoop? > > Le 2013-08-27 23:08, "ch huang" a écrit : > > > >> hi,all: > >> any good idea? thanks > >> >

Re: how to export data from hbase to mysql?

sqoop can not support export hbase data into mysql On Wed, Aug 28, 2013 at 11:13 AM, Jean-Marc Spaggiari < jean-m...@spaggiari.org> wrote: > Take a look at sqoop? > Le 2013-08-27 23:08, "ch huang" a écrit : > > > hi,all: > > any good idea? thanks > > >

how to export data from hbase to mysql?

hi,all: any good idea? thanks

Re: issue about rowkey design

e.org > Sent: Friday, August 16, 2013 8:06 AM > Subject: Re: issue about rowkey design > > > HBase is all about denormalization and designing for the usecase/query > pattern. If it's possible for your application it will be better to > provide three different indexes, as opp

issue about rowkey design

hi,all i have data (data is very huge) with user id ,session id ,and visit time. my query pattern is ,"find all user id in certain time range,find one user's all session id ,and find all session id in certain time range". my difficult is that i can not find a rowkey that good for all the s

about rowkey prefix search

hi,all: i want to speed my timerange search ,so i set my rowkey with 'time + other things', rowkey => 2013-05-01 13"635784ca56e74175b9adcb3a712368 prefix filter is very slow hbase(main):001:0> scan 'cookie_history',{FILTER=>org.apache.hadoop.hbase.filter.PrefixFilter.new(org.apache.hadoop.hbas

Re: issue about search speed and rowkey

and increase batch or just set it as > > default if #qualifiers in a row is not too many. > > > > > > -Original Message- > > From: ch huang [mailto:justlo...@gmail.com] > > Sent: Wednesday, August 07, 2013 5:18 PM > > To: user@hbase.apach

issue about get content from scan output

i use hbase shell, and i always get result from scan operation like rowkey somethingelse \x00\x00\x01Q\xED\xFF\xC0\x00\x00\x01\x00\x0 column=t:\x01w\x057\x08\xF7\x0C\xB7\x10w\x137\x147\x16\xF7\x17\xF7\x1A\xB7\x1B\xB7 what tools i can use under hbase shell commandline to translate these c

issue about search speed and rowkey

hi,all: i have problem in running following code,MoveData method is used to get data from source table ,and modify each row rowkey ,and insert into destination table,and i always get error,anyone can help? public static void writeRow(HTablePool htp,String tablename, String rowkey,String

Re: scan very slow in hbase

chives before posting first (you will > usually get your answer faster if you go this route). > > The below has been answered in the recent past. See > http://search-hadoop.com/m/5tk8QnhFqw > > Thanks, > St.Ack > > > On Tue, Aug 6, 2013 at 12:39 AM, ch huang

Re: scan very slow in hbase

he below has been answered in the recent past. See > http://search-hadoop.com/m/5tk8QnhFqw > > Thanks, > St.Ack > > > On Tue, Aug 6, 2013 at 12:39 AM, ch huang wrote: > > > my workmate tell me hbase is very slow for scan something ,i check the > > region serve

how to import data from other table?

i have a hbase table t1 , i want get 2013-08-01 00:00:00 data ,and put into another table ,how to do it ? anyone can help?

scan very slow in hbase

my workmate tell me hbase is very slow for scan something ,i check the region server find the following information,anyone can help? 13/08/06 15:30:34 WARN ipc.HBaseServer: IPC Server listener on 60020: readAndProcess threw exception java.io.IOException: Connection reset by peer. Count of bytes

Re: issue about put key value and reverse key value into hbase

x27;usertable', "\x00\x00R" > COLUMN CELL > family:timestamp=1375709809258, value=won > 1 row(s) in 0.0190 seconds > > On Mon, Aug 5, 2013 at 1:59 AM, ch huang wrote: > > > hi,all: > >

issue about put key value and reverse key value into hbase

hi,all: i have a key value like 'testkey' , and value '\x00\x00R', i wanto to store them in hbase as rowkey and value rowkey => 'testkey' , info:key => '\x00\x00R' and rowkey => '\x00\x00R' ,info:value => 'testkey' but i try the following command ,it not correct hbase(main):001:0> put 'd

issure about DNS error in running hbase mapreduce

i use hadoop-dns-checker check the dns problem ,seems all ok,but when i run MR task in hbase,it report problem,anyone have good idea? # ./run-on-cluster.sh hosts1 CH22 The authenticity of host 'ch22 (192.168.10.22)' can't be established. RSA key fingerprint is f3:4a:ca:a3:17:08:98:c2:0a:

issure about name node HA configuration

hi,all: i am testing namenode HA,and how to config name node id? use namenode hostname? here nn1,nn2 is what? dfs.ha.namenodes.mycluster nn1,nn2

problem in running coprocessor

here is my example code , and regionserver error output. anyone can help? public class TestMyCo { /** * @param args */ private static Configuration conf =null; static { conf = HBaseConfiguration.create(); conf.addResource( "hbase-site.xml"); } public static void main(String[] arg

can hbase used to store struct data?

i want to store json into hbase ,but i store as key-value ,the struct is destory,any good idea?

Re: the scan will be executed parallel if not use coprocessor?

phoenix is using coprocessor internal On Sun, Jul 14, 2013 at 11:15 PM, Asaf Mesika wrote: > To my knowledge, scan is not parallel, hence the speed of queries of > Impala, Phoenix, and other similar projects. > > On Saturday, July 13, 2013, ch huang wrote: > > > hi ted

Re: the scan will be executed parallel if not use coprocessor?

at 7:36 PM, Ted Yu wrote: > Can you clarify your question a little bit ? > > That is, are you expecting parallel scan within region boundary or across > boundaries ? > > Cheers > > On Jul 13, 2013, at 1:43 AM, ch huang wrote: > > > ATT >

the scan will be executed parallel if not use coprocessor?

ATT

how to add hdfs path into hbase table attribute?

i want set hdfs path ,AND add the path into hbase,here is my code Path path = new Path("hdfs:192.168.10.22:9000/alex/test.jar"); System.out.println(": "+path.toString()+"|"+TestMyCo.class.getCanonicalName()+"|"+Coprocessor.PRIORITY_USER); htd.setValue("COPROCESSOR$1", path.toString()+"|"

org.apache.hadoop.hbase.ipc.HBaseRPC$UnknownProtocolException: No matching handler for protocol MyTestProtocol in region

hi,all: i spend all day for the problem ,and now totally exhausted,hope anyone can help me i code myself endpoint ,the logic is sample run the scan in some region with a filter and count the found records, i do not want my endpoint work for each region,i just need it work for my test tabl

if i wirte myself endpoint ,how can i load it onto server?

ATT

Re: problem in testing coprocessor endpoint

ong sum(byte[] family, byte[] qualifier) > > What additional functionality do you need ? > > On Thu, Jul 11, 2013 at 8:26 PM, ch huang wrote: > > > i am testing coprocessor endpoint function, here is my testing process > ,and > > error i get ,hope any exp

Re: problem in testing coprocessor endpoint

ing them in > lib dir if hbase and modifying hbase-site.xml to point to it under a > property name I forgot at the moment. > What you described is a way to register an Observer type coprocessor. > > > On Friday, July 12, 2013, ch huang wrote: > > > i am testing coprocessor

problem in testing coprocessor endpoint

i am testing coprocessor endpoint function, here is my testing process ,and error i get ,hope any expert on coprocessor can help me out # vi ColumnAggregationProtocol.java import java.io.IOException; import org.apache.hadoop.hbase.ipc.CoprocessorProtocol; // A sample protocol for performing aggr

problem in testing coprocessor function

i use hbase 0.94.6 ,and i am testing coprocessor function,here is my testing java code,and i get problem in compile it,anyone can help me? thanks # javac -cp '/usr/lib/hbase/*' -d test RegionObserverExample.java RegionObserverExample.java:12: cannot access com.google.common.collect.ImmutableList c

can coprocessor be used to do distinct operation?

ATT

Re: why so many skipping load balancing info in master node?

i have three region server,when the skipping action happened ,only one region server is alive ,the other two are disactive,and i start them just now! On Thu, Jul 11, 2013 at 9:04 AM, Ted Yu wrote: > How many region servers do you have ? > > On Wed, Jul 10, 2013 at 6:01 PM, ch hua

why so many skipping load balancing info in master node?

today i check hbase cluster log ,and find many info in error output log,i do not know why,it seems load balancer do not work,anyone can help? cat hbase-hbase-master-CH22.out .. 13/07/11 08:51:53 INFO master.LoadBalancer: Skipping load balancing because balanced cluster; servers=1 regions=61

how to clean old version hbase data in zookeeper?

att, old data in zookeeper prevent master node from starting

Re: master node fail to start

; > On Tue, Jul 9, 2013 at 5:52 PM, ch huang wrote: > > > here is CH35 region server out log > > > > 13/07/10 08:23:34 INFO regionserver.HRegionServer: Serving as > > CH35,60020,1373364396982, RPC listening on CH35/192.168.10.35:60020, > > sessionid=0x3fc29ea749

Re: master node fail to start

: > org.apache.hadoop.hbase.master.AssignmentManager: Failed assignment of > -ROOT-,,0.70236052 to serverName=CH35,60020,1372991820903, > > Have you checked region server log for CH35 ? > > On Tue, Jul 9, 2013 at 5:35 PM, ch huang wrote: > > > i upgrade cdh3u4 to cdh4.3,start master node have problem > > >

master node fail to start

i upgrade cdh3u4 to cdh4.3,start master node have problem 2013-07-09 15:47:09,061 INFO org.apache.hadoop.hbase.catalog.RootLocationEditor: Unsetting ROOT region location in ZooKeeper 2013-07-09 15:47:09,063 DEBUG org.apache.hadoop.hbase.zookeeper.ZKAssign: master:6-0x3fa281450100bd Creating (

Re: unbalance number fo region in cluster

> > > > Which HBase version are you using ? > > > > Thanks > > > > On Jul 3, 2013, at 11:44 PM, ch huang wrote: > > > >> the load balancer process as i see is very slow i have a big table > ,it's > >> region distrabute is node1: 5 ,node

Re: unbalance number fo region in cluster

be diagnosed ? > > Which HBase version are you using ? > > Thanks > > On Jul 3, 2013, at 11:44 PM, ch huang wrote: > > > the load balancer process as i see is very slow i have a big table ,it's > > region distrabute is node1: 5 ,node2: 22 ,node3: 5 ,after 4 hour

question about hbase shell prompt

hbase(main):006:0> the prompt has three part , hbase(main) 006 0 ,what's the third part means?

Re: unbalance number fo region in cluster

Yu wrote: > > > Did you presplit your table ? > > > > Was load balancer enabled ? > > > > What HBase version do you use ? > > > > Thanks > > > > On Jul 3, 2013, at 10:21 PM, ch huang wrote: > > > > > i insert 2GB data int

Re: unbalance number fo region in cluster

hi,i use CH3u4 , no presplit, balancer is enabled,thanks On Thu, Jul 4, 2013 at 1:25 PM, Ted Yu wrote: > Did you presplit your table ? > > Was load balancer enabled ? > > What HBase version do you use ? > > Thanks > > On Jul 3, 2013, at 10:21 PM, ch huang wrote: &

unbalance number fo region in cluster

i insert 2GB data into my hbase cluster ,but i find the region is not balance,is insert operation always cause the region number different on region server? here is my 60010 output Table Regions Name Region Server Start Key End Key demo2,,1372914631698.f42281ec44d113df3e644d5ecdb35366. CH36:600

what is different between store file and regions?

ATT

problem about couldrea hbase ,can not resolve DNS name

i modified all hostname in hadoop&hbase configuration file instead of IP,but i receive following error ,thanks all hbase version is Version 0.90.6-cdh3u4, 13/07/03 11:22:34 INFO zookeeper.ClientCnxn: Session establishment complete on server 192.168.10.22/192.168.10.22:2281, sessionid = 0x3fa28145

question about put operation

if i put a column and value, next ,i put the column value again ,the timestamp is the same as first time,what happened in underlying storage?i stored one column - value pair ,or i have two pairs? i am very confused ,hope some one can help me out

Re: puzzle about hbase row update

//hbase.apache.org/book.html - will give an idea on the design and > architecture. > > Regards > Ram > > > On Tue, Jul 2, 2013 at 1:56 PM, ch huang wrote: > > > what happen when i want to update a row ? in hbase it's has udpate > > conception? > > >

puzzle about hbase row update

what happen when i want to update a row ? in hbase it's has udpate conception?

lzo lib missing ,region server can not start

i add lzo compression in config file ,but region server can not start,it seems lzo lib is miss,how can i install lzo lib for hbase,and in production which compress is used ? snappy or lzo? thanks all # /etc/init.d/hadoop-hbase-regionserver start starting regionserver, logging to /var/log/hbase/hb

question about hbase envionmnet variable

if i set HBASE_HEAPSIZE=2 (HEAP is 20G ) ,can i set jvm option -Xmx20g -Xms20G? if not ,how much i can set?

how can i improve sequence write speed?

i deploy a hbase cluster use in product envionment,how can i improve sequence write speed? thanks all

different test result from PerformanceEvaluation and from my own test!

i am benchmarking the sequentialWrite speed use HBase,but i find the result is different ,i do not know which will be right here is my own procedure,( i modified the PerformanceEvaluation) void testInsert(String tablename, String[] cfg) { try{ HTable table = new HTable(conf,

how can i do compaction manually?

i want clean the data that is deleted ,question is which command i can execute on commandline? thanks all!

if i run PerformanceEvaluation,it will not stop until i stop it manually?

ATT

what is HBaseMiniCluster mean?

hbase has a build-in test tool call org.apache.hadoop.hbase.PerformanceEvaluation on it's doc,miniCluster option is "Run the test on an HBaseMiniCluster" my question is "what is HBaseMiniCluster mean" ?

Re: about schema design problem

nd > token as column). > > Jyothi > ____ > From: ch huang [justlo...@gmail.com] > Sent: Friday, June 28, 2013 1:07 PM > To: user@hbase.apache.org > Subject: Re: about schema design problem > > no , i have a old RDMS(mysql) table ,have two search pa

Re: about schema design problem

Search with row key and search with token is > search with column value? > > Jyothi > ________ > From: ch huang [justlo...@gmail.com] > Sent: Friday, June 28, 2013 12:11 PM > To: user@hbase.apache.org > Subject: about schema design problem

about schema design problem

hi,all: i have two search pattern , search for row with specific id ,and search for row with specific token,how can i design schema fit two search pattern effectly?

what's the relationship between hadoop datanode and hbase region node?

ATT

is hbase cluster support multi-instance?

hi all: can hbase start more than one instance ,like mysql, if can ,how to manage these instances? ,thanks a lot

what the max number of column that a column family can has?

ATT

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