Grokbase Groups HBase user April 2013

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116 discussions - 722 posts

  • Hi all, I'm having an issue with getting HBase to run. I'm following this tutorial: When I run that command [ bin/ start ], nothing ...
    Yves S. GarretYves S. Garret
    Apr 25, 2013 at 4:53 pm
    May 29, 2013 at 5:37 pm
  • Hello, We're doing some performance testing of the essential column family feature, and we're seeing some performance degradation when comparing with and without the feature enabled: Performance of ...
    James TaylorJames Taylor
    Apr 7, 2013 at 6:05 am
    Apr 10, 2013 at 5:31 am
  • Hi All, We are using HBase 0.94.5 and Hadoop 1.0.4. We have HBase cluster of 5 nodes(5 regionservers and 1 master node). Each regionserver has 8 GB RAM. We have loaded 25 millions records in HBase ...
    Ankit JainAnkit Jain
    Apr 13, 2013 at 3:11 pm
    Sep 30, 2013 at 11:34 am
  • What is the difference between a NoSQL database like HBase and a data warehouse? Doesn’t both store data from disparate sources and formats? -- View this message in context ...
    Apr 28, 2013 at 3:48 am
    Apr 30, 2013 at 6:42 pm
  • Hello, I am newer for hbase, but i have some experience on cassandra. In the official document, it is said prefer to use rows instead of columns. I don't know whether I should follow. This is my user ...
    Shawn duShawn du
    Apr 7, 2013 at 6:29 pm
    Apr 28, 2013 at 3:24 pm
  • This feels like a stupid mistake I'm making somewhere but I searched for quite a while and did not find any evidence that anybody else reported this problem. I'm trying to use hbase shell to call the ...
    Robin GowinRobin Gowin
    Apr 18, 2013 at 3:49 pm
    Apr 26, 2013 at 1:42 pm
  • Hi, We are facing problems with really slow HBase region server recoveries ~ 20 minuted. Version is hbase 0.94.3 compiled with hadoop.profile=2.0. Hadoop version is CDH 4.2 with HDFS 3703 and HDFS ...
    Varun SharmaVarun Sharma
    Apr 19, 2013 at 1:01 am
    Apr 22, 2013 at 7:52 am
  • Hi, I have a rowkey defined by : getMD5AsHex(Bytes.toBytes(myObjectId)) + String.format("%19d\n", (Long.MAX_VALUE - changeDate.getTime())); How could I get the previous and next row for a given ...
    Apr 29, 2013 at 3:03 pm
    May 1, 2013 at 2:22 pm
  • Hi, I have been trying to play around with the regionserver handler count. What I noticed was, the cluster comes up fine up to a certain point, ~7500 regionserver handler counts. But above that the ...
    Viral BajariaViral Bajaria
    Apr 28, 2013 at 8:31 pm
    Apr 30, 2013 at 9:53 am
  • Hi Is it possible to completely overwrite/replace a row in a single _atomic_ action? Already existing columns and qualifiers should be removed if they do not exist in the data inserted into the row ...
    Kristoffer SjögrenKristoffer Sjögren
    Apr 19, 2013 at 5:54 pm
    Apr 22, 2013 at 10:59 pm
  • Hello, I am using HBase 0.94.6 on CDH 4.2 and trying to export a snapshot to another cluster (also CDH 4.2), but this is failing repeatedly. The table I am trying to export is approximately 4TB in ...
    Sean MacDonaldSean MacDonald
    Apr 22, 2013 at 7:12 pm
    Apr 29, 2013 at 5:01 pm
  • Hi All, I am trying to use Hbase for real-time data retrieval with a timeout of 50 ms. I am using 2 machines as datanode and regionservers, and one machine as a master for hadoop and Hbase. But I am ...
    Vibhav MundraVibhav Mundra
    Apr 1, 2013 at 10:09 am
    Apr 4, 2013 at 4:22 am
  • Hi, quick question. How are the data from the map tasks partitionned for the reducers? If there is 1 reducer, it's easy, but if there is more, are all they same keys garanteed to end on the same ...
    Jean-Marc SpaggiariJean-Marc Spaggiari
    Apr 10, 2013 at 12:50 pm
    Apr 11, 2013 at 11:53 am
  • The problem is that when I'm putting my data (multithreaded client, ~30MB/s traffic outgoing) into the cluster the load is equally spread over all RegionServer with 3.5% average CPU wait time ...
    Apr 24, 2013 at 10:13 am
    Sep 9, 2014 at 8:45 pm
  • Hi, Maybe there is an obvious way but i'm not seeing it. I have a need to query HBase for multiple chunks of data, that is something equivalent to select columns from table where rowid between A and ...
    Graeme WallaceGraeme Wallace
    Apr 8, 2013 at 6:24 pm
    Apr 9, 2013 at 3:01 am
  • Hi, I want to increment a cell value only after checking a condition on another cell. I could find checkAndPut/checkAndDelete on HTableInteface. It seems that checkAndIncrement (and checkAndAppend) ...
    Lior SchachterLior Schachter
    Apr 27, 2013 at 1:02 pm
    May 16, 2013 at 3:21 am
  • Hi, All, I'd like to add a global timestamp oracle on Zookeep to assign globally unique timestamp for each Put/Get issued from HBase cluster. The reason I put it on Zookeeper is that each Put/Get ...
    Yun pengYun peng
    Apr 16, 2013 at 12:14 pm
    Apr 27, 2013 at 12:19 am
  • Hi, all I'm evaluating hbase- and i have 48 regions on 2 node cluster. I was restarting on of RSs and after that tried to balance cluster by running balancer from shell. After running command ...
    Samir AhmicSamir Ahmic
    Apr 12, 2013 at 4:00 pm
    Apr 12, 2013 at 6:23 pm
  • Hi all, Anyone has an idea what's going wrong here? I've downloaded the HBase tarball, installed HBase on my Mac OS X 10.8 box but get always the same error launching the hbase shell ...
    Christoph PilkaChristoph Pilka
    Apr 6, 2013 at 12:34 am
    Apr 6, 2013 at 7:31 am
  • Hello, I have a question. I have a table where i store data in the column qualifiers(the values itself are null). I just have 1 column family. The number of columns per row is variable (1~ few ...
    Prakash KadelPrakash Kadel
    Apr 3, 2013 at 1:43 pm
    Apr 3, 2013 at 3:42 pm
  • Hi, I have an hbase cluster where I have a table with a composite key. I map this table to a Hive external table using which I insert/select data into/from this table: CREATE EXTERNAL TABLE event(key ...
    Rupinder SinghRupinder Singh
    Apr 30, 2013 at 5:49 pm
    May 2, 2013 at 4:02 am
  • Hi, I'm having two tables - CUSTOMERS(60000 + rows) and PRODUCTS(1000851 rows). The table structures are : CUSTOMERS rowkey : CUSTOMER_ID column family : CUSTOMER_INFO columns : NAME EMAIL ADDRESS ...
    Omkar JoshiOmkar Joshi
    Apr 17, 2013 at 9:49 am
    Apr 22, 2013 at 6:41 am
  • Hi all, I had a regionserver crushed during counters increment. Looking at the regionserver log I saw: org.apache.hadoop.hbase.DroppedSnapshotException: region: TABLE_NAME, ...
    Amit SelaAmit Sela
    Apr 17, 2013 at 8:30 am
    Apr 17, 2013 at 6:35 pm
  • Hi, Is there an explicit specification of the behavior of max versions (set in a get/scan) when combined with filters? From my experiments (with 0.92 CDH4.1.2), the max versions is applied in a way ...
    Christophe TatonChristophe Taton
    Apr 5, 2013 at 6:20 pm
    Apr 9, 2013 at 5:57 pm
  • Hello, This is a follow-up to my previous post a few days back. I am trying to connect to 2 different Hadoop clusters' setups through a same client but I am running into the issue that the config of ...
    Shahab YunusShahab Yunus
    Apr 26, 2013 at 10:52 pm
    Apr 28, 2013 at 12:44 pm
  • Hello, We use HBase core processor endpoint to process realtime data. But when I use coreprocessorExec method to scan table and pass startRow and endRow. It always scan all table instead of the ...
    Apr 19, 2013 at 9:54 am
    Apr 20, 2013 at 5:35 am
  • Hi, I'm using HBase 0.94.5 with thrift server. I'm trying to get the rows from HBase using org.apache.hadoop.hbase.thrift.generated.Hbase.Client.getRows(ByteBuffer, List<ByteBuffer , Map<ByteBuffer, ...
    Anand nalyaAnand nalya
    Apr 11, 2013 at 3:20 pm
    Apr 12, 2013 at 2:33 pm
  • Hi, I can stop region server by using HBaseAdmin class but cannot start. How can I start region server by using Hbase API? HRegionServer class has startRegionServer method, Can I use this class? -- ...
    Mehmet SimsekMehmet Simsek
    Apr 19, 2013 at 12:16 pm
    Apr 20, 2013 at 12:10 pm
  • HI, from web ui I find one of my 5 regionserver missing, and check the log find: ***************************************************************************************** [[email protected] logs]$ tail ...
    Hua beatlsHua beatls
    Apr 17, 2013 at 7:38 am
    Apr 17, 2013 at 9:31 am
  • Hello, I had an interesting problem come up recently. We have a few thousand regions across 8 datanode/regionservers. I made a change, increasing the heap size for hadoop from 128M to 2048M which ...
    Brennon ChurchBrennon Church
    Apr 12, 2013 at 5:51 am
    Apr 15, 2013 at 6:01 pm
  • Hello, I cannot see what is amiss with the following configuration. I have followed, to the best of my knowledge, the instructions to a "T". If anyone could shed some light, I would be grateful. All ...
    Jeff BlaineJeff Blaine
    Apr 3, 2013 at 8:21 pm
    Apr 4, 2013 at 12:37 am
  • Hi I am new to HBase, I have been trying to POC an application and have a design questions. Currently we have a single table with the following key design jobId_batchId_bundleId_uniquefileId This is ...
    Cameron GandeviaCameron Gandevia
    Apr 26, 2013 at 7:50 pm
    May 2, 2013 at 6:10 pm
  • Hi, I get the following error with scala HBaseConfiguration.create() java.lang.RuntimeException: hbase-default.xml file seems to be for and old version of HBase (null), this version is ...
    Håvard Wahl KongsgårdHåvard Wahl Kongsgård
    Apr 29, 2013 at 5:05 pm
    May 2, 2013 at 8:22 am
  • Hi, I am just reading about region splitting. By default - as I understand - Hbase handles splitting the regions. I just don't know how to imagine on which key it splits the regions. 1) For example ...
    Pal KonyvesPal Konyves
    Apr 20, 2013 at 5:52 pm
    Apr 21, 2013 at 11:22 am
  • Hi, I'm trying to connect from a Java client running on a Windows desktop machine to a remote HBase cluster running in the distributed mode(atop 2-node Hadoop cluster). 1. On the master(namenode)node ...
    Omkar JoshiOmkar Joshi
    Apr 15, 2013 at 5:12 am
    Apr 15, 2013 at 11:15 am
  • Hi guys: I get the jvm error with these information: 2013-04-07 23:36:58,344 FATAL org.apache.hadoop.hbase.regionserver.HRegionServer: ABORTING region server a2,60020,1365323145468: Unhandled ...
    Jian fanJian fan
    Apr 8, 2013 at 1:28 am
    Apr 8, 2013 at 5:41 am
  • Hi All. There is confused understanding about region-regionser locality. from the current document , 9.7.3. Region-RegionServer Locality Over time, ...
    Apr 4, 2013 at 3:03 pm
    Apr 4, 2013 at 6:51 pm
  • Hi, If a region is being written to, and a scanner takes a lease out on the region, what will happen to the writes? Is there a concept of "Transaction Isolation Levels"? I don't see errors in Puts ...
    Aaron ZimmermanAaron Zimmerman
    Apr 25, 2013 at 8:10 pm
    Apr 29, 2013 at 6:32 pm
  • Hello list, I was wondering how to create a multi-row-mutation with precondition-constraints. Something like this: public boolean[] multiCheckAndPut(byte[]row, byte[] family, byte[] column, List<Put ...
    Apr 27, 2013 at 3:10 pm
    Apr 28, 2013 at 8:09 am
  • Folks: This is my first post on the HBase user mailing list. I have the following scenario: I've a HBase table of upto a billion keys. I'm looking to support an application where on some user action, ...
    Sudarshan Kadambi (BLOOMBERG/ 731 LEXIN)Sudarshan Kadambi (BLOOMBERG/ 731 LEXIN)
    Apr 25, 2013 at 9:44 pm
    Apr 25, 2013 at 10:45 pm
  • This is with HBase 0.94.4 & CDH 4.1.1 This morning one our region servers (we have 44) stopped responding to the '/jmx' request. (It's working for regular activity.) Additionally, the region server ...
    Apr 23, 2013 at 1:57 pm
    Apr 24, 2013 at 6:30 pm
  • Hi folks, I reorganized the Schema Design case studies 2 weeks ago and consolidated them into here, plus added several cases common on the dist-list ...
    Doug MeilDoug Meil
    Apr 19, 2013 at 10:40 pm
    Apr 22, 2013 at 1:41 am
  • I are planning to create a "scheduled task list" table in our hbase cluster. Essentially we will define a table with key timestamp and then the row contents will be all the tasks that need to be ...
    Kireet ReddyKireet Reddy
    Apr 15, 2013 at 5:17 pm
    Apr 20, 2013 at 11:11 pm
  • We have a 3 node cluster in production with the zookeeper instances running on each node. I checked the memory usage for QuorumPeerMain using 'cat /proc/<processid /status' and it shows that the ...
    Rohit KelkarRohit Kelkar
    Apr 18, 2013 at 3:22 pm
    Apr 19, 2013 at 6:26 pm
  • Hi, I'm having the a table named ORDERS with 1000851 rows: rowkey : ORDER_ID column family : ORDER_DETAILS columns : CUSTOMER_ID PRODUCT_ID REQUEST_DATE PRODUCT_QUANTITY PRICE PAYMENT_MODE I'm using ...
    Omkar JoshiOmkar Joshi
    Apr 17, 2013 at 11:53 am
    Apr 19, 2013 at 10:01 am
  • Hi, When I use HTablePool to perform some HBase data loading operations, I encountered a problem where the Put operation seemed to hang forever. A little bit of digging shows that the default client ...
    Jim the Standing BearJim the Standing Bear
    Apr 10, 2013 at 2:56 pm
    Apr 10, 2013 at 4:19 pm
  • hi, There are some physical machines which each one contains a large ssd(2T) and general disk(4T), and we want to build our hdfs and hbase environment. If we use all storage(6T) as each machine ...
    Bing JiangBing Jiang
    Apr 9, 2013 at 11:42 am
    Apr 10, 2013 at 5:07 am
  • Hi, I have a table "service_counters" that has service id as row id. There is a column family "stats-hourly" that stores counters related to that service per hour. I have set TTL to be 7 days for the ...
    Ashish NigamAshish Nigam
    Apr 3, 2013 at 6:34 pm
    Apr 4, 2013 at 12:54 am
  • Hi, When i try to restart the HBase service i see the following errors in my Hbase Master log, 2013-04-02 03:37:29,713 INFO org.apache.hadoop.hbase.master.metrics.MasterMetrics: Initialized ...
    Praveen BysaniPraveen Bysani
    Apr 2, 2013 at 4:20 am
    Apr 2, 2013 at 10:20 am
  • Is it possible to prioritize writes over reads in HBase? I'm facing some I/O read related issues that influence my write clients and cluster in general (constantly growing store files on some RS) ...
    Apr 24, 2013 at 10:25 am
    May 8, 2013 at 1:30 pm
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144 users for April 2013

Ted Yu: 107 posts Jean-Marc Spaggiari: 77 posts Lars hofhansl: 21 posts Ramkrishna vasudevan: 19 posts Omkar Joshi: 17 posts Michel Segel: 16 posts Varun Sharma: 15 posts Viral Bajaria: 14 posts Andrew Purtell: 13 posts Azuryy Yu: 13 posts Michael Stack: 13 posts James Taylor: 12 posts Yves S. Garret: 12 posts Asaf Mesika: 11 posts Vibhav Mundra: 9 posts Amit Sela: 8 posts Anoop Sam John: 8 posts Mohammad Tariq: 8 posts Robin Gowin: 8 posts Shahab Yunus: 8 posts
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