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136 discussions - 778 posts

  • Greetings, I am relatively new to Hadoop but we now have an 10 node cluster up and running just DFS for now and will be expanding this rapidly as well as adding Hbase. I am looking to find out what ...
    Joseph ColemanJoseph Coleman
    Jul 25, 2011 at 3:09 pm
    Jul 30, 2011 at 1:18 am
  • I've been trying to understand how Hbase can provide good performance using HDFS when purpose of HDFS is sequential large block sizes which is inherently different than of Hbase where it's more ...
    Mohit AnchliaMohit Anchlia
    Jul 7, 2011 at 6:12 pm
    Jul 12, 2011 at 4:55 am
  • We had some serious issues from the hmaster running out of space on the root partition. We were getting "region server not found" errors on the client which then turned to client errors "servers have ...
    WayneWayne
    Jul 1, 2011 at 3:33 pm
    Jul 11, 2011 at 2:00 pm
  • Hi folks, i'm running in an interesting issue: we have a zookeeper cluster running on 3 servers we run mapreduce jobs using org.apache.hadoop.conf.Configuration to pass parameters to our mappers the ...
    Andre ReiterAndre Reiter
    Jul 19, 2011 at 8:00 am
    Nov 20, 2011 at 8:18 pm
  • Hi, I have a 12-node hbase cluster setup with 3 nodes as a part of zookeeper quorum. I am able to run hbase shell, create tables.. and able to access tables in the shell. Now I am configuring pig to ...
    Praveenesh kumarPraveenesh kumar
    Jul 5, 2011 at 9:39 am
    Jul 15, 2011 at 5:21 pm
  • Hi, I looks like we've lost a region, include the directory on hdfs and its meta record as well. We need some more time to dig into the log sea, to figure out the root cause. But first of all, we ...
    Xu-Feng MaoXu-Feng Mao
    Jul 6, 2011 at 12:37 pm
    Jul 7, 2011 at 5:15 am
  • Hi everyone. I'd like to run the following *data* *loss* scenario by you to see if we are doing something obviously wrong with our setup here. Setup: -cdh3u0 - Hadoop 0.20.2 - HBase 0.90.1 - 1 Master ...
    吴限吴限
    Jul 27, 2011 at 3:58 pm
    Jul 28, 2011 at 4:03 pm
  • Hello list, at SIGMOD this year i've seen a spreading of different storage files for HBase, with different techniques. My scenario and usage doesn't really require range queries, so I thought I'd ...
    Claudio MartellaClaudio Martella
    Jul 15, 2011 at 12:33 pm
    Jul 19, 2011 at 12:34 pm
  • Hello, we ran a test client generating data into GZ and LZO compressed table. Equal data sets (number of rows: 1008000 and the same table schema). ~ 7.78 GB disk space uncompressed in HDFS. LZO is ~ ...
    Steinmaurer ThomasSteinmaurer Thomas
    Jul 28, 2011 at 1:31 pm
    Aug 26, 2011 at 9:01 am
  • Hi everybody, we have our hadoop + hbase cluster running at the moment with 6 servers everything is working just fine. We have a web application, where data is stored with the row key = user id ...
    Andre ReiterAndre Reiter
    Jul 14, 2011 at 7:52 pm
    Jul 30, 2011 at 12:43 am
  • Hi all, I'm running a scan using the M/R framework. My table contains hundreds of millions of rows and I'm scanning using start/stop key about 50 million rows. The problem is that some map tasks get ...
    Lior SchachterLior Schachter
    Jul 4, 2011 at 11:49 am
    Jul 4, 2011 at 11:32 pm
  • Hello, I am loading lots of data through API in HBase table. I am using HBase Java API to do this. If I convert this code to map-reduce task and use *TableOutputFormat* class then will I get any ...
    Abhay ratnaparkhiAbhay ratnaparkhi
    Jul 17, 2011 at 8:08 pm
    Aug 29, 2011 at 6:35 pm
  • Hi all. We are currently using Flume to aggregate all our logs from all of our application servers. Although flume does work, it is extremely fussy and goes down without warning. We have decided to ...
    MarkMark
    Jul 26, 2011 at 2:40 pm
    Jul 29, 2011 at 4:50 pm
  • I have an HTable instance instantiated as part of a singleton service. This singleton service is called from different threads from different parts of the app. Reading through the HTable docs ...
    Large dataLarge data
    Jul 20, 2011 at 11:45 pm
    Jul 23, 2011 at 2:35 pm
  • Hi, I am new user for the hbase and I have trouble in starting HBase. I am using the hadoop-0.20.2, zookeeper 3.3.3 and Hbase 0.90.1 My conf/hbase-site.xml is <property <name hbase.rootdir</name ...
    ShanmuganathanShanmuganathan
    Jul 18, 2011 at 7:30 am
    Jul 18, 2011 at 3:41 pm
  • Hi guys, We're using the Stargate REST server to access HBase data and as of 0.90.1 we getting HTTP 200 packets where we used to get 201s and 204s. There seem to be two significant changes... We used ...
    Greg CottmanGreg Cottman
    Jul 19, 2011 at 6:57 am
    Aug 11, 2011 at 11:41 am
  • Hi all, I am using HBase 0.90+HBASE-3789 and I want to know how to restart the cluster safely. Basically, there are two kinds of restarts: 1. Keep the HBase cluster working while restarting the whole ...
    Weihua JIANGWeihua JIANG
    Jul 13, 2011 at 6:30 am
    Jul 19, 2011 at 11:04 pm
  • Hello, we are thinking about using Hbase table as a simple queue which will dispatch the work for a mapreduce job, as well as real time fetching of data to present to end user. In simple terms, ...
    Jack LevinJack Levin
    Jul 16, 2011 at 4:38 pm
    Jul 19, 2011 at 6:28 pm
  • Looking at HBaseClient.getConnection(...) I see this: ... synchronized (connections) { connection = connections.get(remoteId); if (connection == null) { connection = new Connection(remoteId); ...
    LarsLars
    Jul 29, 2011 at 4:28 am
    Aug 2, 2011 at 10:10 pm
  • Hello, we are currently evaluating HBase for a project. In respect to available backup options, we found the following blog post here: http://blog.sematext.com/2011/03/11/hbase-backup-options/ ...
    Steinmaurer ThomasSteinmaurer Thomas
    Jul 14, 2011 at 11:57 am
    Jul 30, 2011 at 12:46 am
  • Hi, I manage HBase cluster changing configuration like <property <name zookeeper.znode.parent</name <value /master</value </property for a replication purpose. When I wrote a client application but ...
    Takuya UESHINTakuya UESHIN
    Jul 23, 2011 at 1:39 pm
    Jul 25, 2011 at 12:03 pm
  • Hey everyone, We periodically see a situation where the regionserver process exists in the process list, zookeeper thread sends the keepalive so the master won't remove it from the active list, yet ...
    Matt DaviesMatt Davies
    Jul 14, 2011 at 6:37 pm
    Jul 15, 2011 at 6:03 am
  • Hey people, I am very new to HBase, and I would like if someone gave me guidance regarding connection pooling. Thanks a lot, in advance. Regards, Aadish -- View this message in context: ...
    AadishAadish
    Jul 18, 2011 at 6:16 am
    Jul 30, 2011 at 11:48 am
  • Hi everyone. I have just completed in installing my hbase and there are some errors when I try to start my cluster. Setup: -cdh3u1 - Hadoop 0.20.2 - HBase 0.90.1 - 1 Master Node running as NameNode & ...
    Xian WooXian Woo
    Jul 28, 2011 at 4:55 pm
    Jul 29, 2011 at 2:45 pm
  • Hi All, I am running the hbase in fully distributed mode. I want to create a table with 500 rows . After creation of 122 rows the following exception is thrown ...
    Shanmuganathan.rShanmuganathan.r
    Jul 27, 2011 at 11:13 am
    Jul 28, 2011 at 10:14 am
  • I would like to implement a multidimensional query system that aggregates large amounts of data on-the-fly by fanning out queries in parallel. It should be fast enough for interactive exploration of ...
    Paul NickersonPaul Nickerson
    Jul 25, 2011 at 2:44 am
    Jul 25, 2011 at 9:26 pm
  • Hi, I don't know how to report issue to HBase team. So I just post it here. There might be a bug for REST web service to get rows with given startRow and endRow. For example, to get a list of rows ...
    Allan yanAllan yan
    Jul 18, 2011 at 11:06 pm
    Jul 20, 2011 at 5:19 pm
  • Hi all, I am using Hadoop - 0.20.1 and HBASE - 0.20. Currently, I am trying to retrieve and iterate through all the column values of a particular rowkey in an Hbase Table. But I am able to retrieve ...
    Narayanan KNarayanan K
    Jul 11, 2011 at 5:37 am
    Jul 14, 2011 at 4:22 pm
  • Hi all, I want to enable the bloomfilter on some existing tables to speed-up row-key existence checking. I altered the BLOOMFILTER from "NONE" to "ROW" for this purpose. But one think I am not clear ...
    Weiwei XiongWeiwei Xiong
    Jul 9, 2011 at 1:03 am
    Jul 11, 2011 at 7:17 pm
  • Hi, when I start my hbase cluster, there are some error logs in the master-log: <the ip and hostname node3 192.168.1.15 192.168.1.13 are the same machine that have two NIC 2011-07-05 17:13:13,820 ...
    Jameson LiJameson Li
    Jul 5, 2011 at 10:14 am
    Jul 11, 2011 at 2:49 am
  • Yesterday we ran into an interesting issue. We were shutting down our HBase cluster ( 0.90.1 CDH3u0 ) and in the process one of the nodes encountered a Java heap space exception. The bummer is the ...
    Andy SautinsAndy Sautins
    Jul 15, 2011 at 4:34 pm
    Aug 26, 2011 at 5:17 pm
  • Hi Everyone, I have been trying to run a mapreduce on HBase 0.20.2 - Source and Sink both being HBase Tables. On running this mapreduce code, the Map completes successfully, but before reduce starts, ...
    Narayanan KNarayanan K
    Jul 26, 2011 at 5:45 pm
    Aug 4, 2011 at 12:22 am
  • Hello, I am wondering what the best way is to fix errors reported with hbck in 0.90.3. We did a migration from 0.20.4 to 0.90.3 by copying over hbase tables from 0.20.4 to a new cluster with 0.90.3. ...
    Mat HofschenMat Hofschen
    Jul 6, 2011 at 3:22 pm
    Jul 25, 2011 at 10:25 am
  • Hi - At hadoop summit it was mentioned that there was a planning meeting for a project regarding hbase and lucene. I believe the meeting was scheduled for the day after the summit. I wasn't able to ...
    Geoff HendreyGeoff Hendrey
    Jul 19, 2011 at 4:13 pm
    Jul 21, 2011 at 5:24 pm
  • Hello, I'm trying to sort out some things about hadoop versions. I'm currently trying to run both HBase 0.90.3 and Yahoo!'s Giraph on the same cluster. Officially Giraph supports 0.20.203 and depends ...
    Claudio MartellaClaudio Martella
    Jul 18, 2011 at 1:02 pm
    Jul 18, 2011 at 9:26 pm
  • Hi: we found a strange problem in our read test. It is a 5 nodes cluster.Four of our 5 regionservers set hfile.block.cache.size=0.4, one of them is 0.1(node A). When we random read from a 2TB data ...
    Mingjian DengMingjian Deng
    Jul 14, 2011 at 12:28 pm
    Jul 18, 2011 at 2:50 am
  • I'm interested in the answer to this question to get a clear understanding of the data consistency guarantee of HBase. if I write a row key --- column into hbase region server, I see that in ...
    YangYang
    Jul 10, 2011 at 8:10 am
    Jul 11, 2011 at 4:08 pm
  • Hi, Since we've run into HBASE-3872 issue, we're considering upgrade a production system from cdh3u0 to 0.90.3+HBASE-3872 patched. Is it safe to just replace the hbase directory, and restart all the ...
    Xu-Feng MaoXu-Feng Mao
    Jul 9, 2011 at 2:44 am
    Jul 9, 2011 at 3:59 am
  • Hi It look like the usage of HTablePool might be improved. Now, once you get the connection from pool you must take good care to return it by calling HTablePool.putTable(table); If you close the ...
    Daniel IancuDaniel Iancu
    Jul 1, 2011 at 2:25 pm
    Jul 1, 2011 at 5:21 pm
  • Hello, we have a three part row-key taking into account that the first part is important for distribution/partitioning when the system grows. Depending on the access pattern, we might be in a ...
    Steinmaurer ThomasSteinmaurer Thomas
    Jul 27, 2011 at 6:11 am
    Aug 4, 2011 at 10:05 pm
  • Hi everyone, I do have a column family where I store counts of items under each column, and I need to have top N columns (items) sorted by count descending. I know hbase doesn't sort columns by value ...
    Barış Can DaylıkBarış Can Daylık
    Jul 28, 2011 at 3:38 pm
    Jul 29, 2011 at 4:25 pm
  • Hi Everyone, Hbase Version: 0.90.3 Hadoop Version: cdh3u0 2 region servers, zookeeper quorum managed by hbase. I was doing some tests and it seemed regions are not getting reassigned by master if RS ...
    Shrijeet PaliwalShrijeet Paliwal
    Jul 14, 2011 at 11:33 pm
    Jul 15, 2011 at 9:42 pm
  • Hi, all, I have a hbase region server of 10 regions and find the compaction queue size is always 10 at maximum. After I finished inserting 1 billion records, there are still hundreds of HFiles in ...
    Sheng ChenSheng Chen
    Jul 7, 2011 at 5:56 am
    Jul 7, 2011 at 12:04 pm
  • Hello list, i'm using hbase 0.90.3 on a 5 nodes cluster. I'm using a table as a string<- long map. As I'm using this map a lot, I was thinking about installing memcache on the client side, as to ...
    Claudio MartellaClaudio Martella
    Jul 4, 2011 at 2:33 pm
    Jul 5, 2011 at 12:16 pm
  • Hi, It has been quite a while since I have followed instruction on [1] to install and run hbase on windows os. However when I follow the steps ditto, and run start-hbase.sh (from Cygwin) it shows me ...
    AadishAadish
    Jul 30, 2011 at 12:00 pm
    Aug 1, 2011 at 9:06 pm
  • Hi All, I am running the HBase in fully distributed mode. I want to improve my the HBase configuration. So I move to the Backup_Master. I include the conf/backup-masters file and i given the IP where ...
    Shanmuganathan.rShanmuganathan.r
    Jul 29, 2011 at 1:21 pm
    Aug 1, 2011 at 8:42 pm
  • Hi, I was studying Hbase with "Hadoop: The Definitive Guide". There was a schema example that had as the row key, "Group Id + Reverse Timestamp." This way the same groups will be located near one ...
    Edward choiEdward choi
    Jul 22, 2011 at 7:19 am
    Jul 22, 2011 at 3:17 pm
  • I have a few (about 10) groups of columns with similar keys. Each group has a different access pattern. For most keys, there is only one group that has a value. Since 'HBase currently does not do ...
    Sheng ChenSheng Chen
    Jul 18, 2011 at 3:40 am
    Jul 20, 2011 at 1:33 am
  • Can anyone please giude for indexing in Hbase. Thanks. -- View this message in context: http://old.nabble.com/Hbase-Indexing-tp32094911p32094911.html Sent from the HBase User mailing list archive at ...
    Chaitali ShahChaitali Shah
    Jul 19, 2011 at 9:19 pm
    Jul 19, 2011 at 9:31 pm
  • Hi All, I have a 5-node cluster setup with 3 nodes as a part of zookeeper quorum. When i restart the hbase master, the server try to connect to an unknown host and then crash. Anyone seen this error ...
    Jason ChuongJason Chuong
    Jul 15, 2011 at 12:17 pm
    Jul 15, 2011 at 9:51 pm
Jul 2011
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discussions136
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144 users for July 2011

Stack: 139 posts Ted Yu: 53 posts Doug Meil: 32 posts Andrew Purtell: 23 posts Ted Dunning: 20 posts Xu-Feng Mao: 18 posts Shanmuganathan.r: 17 posts Andre Reiter: 15 posts Buttler, David: 15 posts 吴限: 15 posts Claudio Martella: 14 posts Srikanth P. Shreenivas: 11 posts Michel Segel: 10 posts Eran Kutner: 9 posts Jack Levin: 9 posts Praveenesh kumar: 9 posts Steinmaurer Thomas: 9 posts Wayne: 9 posts Gan, Xiyun: 8 posts Jean-Daniel Cryans: 8 posts
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