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88 discussions - 542 posts

  • Hi, I have been monitoring the system resources such as memory Heap usage for Regionserver, load average, network bandwidth, etc. I experienced a disconnection last night. When I checked the memory ...
    Zhenyu ZhongZhenyu Zhong
    Nov 11, 2009 at 5:02 pm
    Dec 1, 2009 at 6:50 pm
  • Hi all, I'm new to HBase and trying to configure it to run with a cluster of 6 machines. I'm logged into the Master Node and ran the start scripts as directed from the Wiki, but I'm getting an ugly ...
    Chris BatesChris Bates
    Nov 9, 2009 at 9:00 pm
    Nov 11, 2009 at 6:28 pm
  • Hey- Quick question: what are the classes / how do I run the hbase-test .jar in 0.20.2? I'm getting the error that there's no main class and I can't find anything written about it. Thanks! Mark ...
    Mark VigeantMark Vigeant
    Nov 24, 2009 at 11:00 pm
    Nov 30, 2009 at 10:05 pm
  • Hi! I am absolutely new to HBase. All I have done is to read up documentation, presentation and getting a single instance up and running. I am starting on a Content Management System which will be ...
    Imran M YousufImran M Yousuf
    Nov 12, 2009 at 2:13 pm
    Nov 20, 2009 at 2:55 pm
  • Hi, We are running HBase 0.20.0 with 3 region servers (on EC2 with EBS volumes). We suddenly found that data for a week is missing in one of our tables. This table is continuously updated. When we ...
    Vaibhav PuranikVaibhav Puranik
    Nov 10, 2009 at 1:11 am
    Nov 14, 2009 at 1:52 am
  • Language-independent RPC services for HBase: is there concensus on preference? Architecturally, I imagine they are equivalent. Performance-wise, I imagine Thrift is most optimal. As for support and ...
    Joost OuwerkerkJoost Ouwerkerk
    Nov 5, 2009 at 1:11 am
    Nov 18, 2009 at 8:27 am
  • I have a large amount of sequential ordered rows I would like to write to an HBase table. What is the preferred way to do bulk writes of multi-column tables in HBase? Using the get/put interface ...
    CalvinCalvin
    Nov 30, 2009 at 10:34 pm
    Dec 30, 2009 at 7:14 am
  • I'm trying to install HBase in stand-alone mode on a laptop running Ubuntu. I can get as far as running HBase with the "help" and "version" commands but when I try any of the other commands (such as ...
    Ratner, Alan S (IS)Ratner, Alan S (IS)
    Nov 30, 2009 at 9:05 pm
    Dec 3, 2009 at 11:55 pm
  • Hi, This is regarding the region unavailability when a region server goes down. There will be cases where we have thousands of regions per RS and it takes considerable amount of time to redistribute ...
    Murali Krishna. PMurali Krishna. P
    Nov 25, 2009 at 9:32 am
    Nov 26, 2009 at 11:41 am
  • If I setup a hbase cluster, say with 10 nodes, can I also use the same cluster for my distributed program using the hadoop running underneath hbase? Essentially the thought is to use underlying ...
    RaviRavi
    Nov 29, 2009 at 5:47 am
    Dec 18, 2009 at 3:47 am
  • I'm trying to play around with HBase but it hasn't been working for me. From the look of the logs, it appears that the master is running on 127.0.1.1 instead of my machine (fry) and so all of the ...
    Mark VigeantMark Vigeant
    Nov 23, 2009 at 8:31 pm
    Nov 26, 2009 at 12:20 am
  • Hey- So I'm trying to run a HBase 0.20.2 test instance on a 4 node hadoop 0.20.0 cluster. I have a 2-server ZK 3.2.1 quorum and I started putting HBase on the nodes, but I'm running into a problem: ...
    Mark VigeantMark Vigeant
    Nov 20, 2009 at 11:31 pm
    Nov 23, 2009 at 10:23 pm
  • Hi all, How to store a list with hbase ? Do I have to serialize list to bytes before storing or shall I put multi-values in colunm ? What is the best way ? Thanks, Julien
    Julien RuchaudJulien Ruchaud
    Nov 10, 2009 at 9:50 am
    Nov 20, 2009 at 7:50 pm
  • Hello Hbase Users, I'm trying to decide what database schema is better, more precisely how to partition my data. Is it better to have few tables with a lot of keys OR a lot of tables with fewer keys? ...
    TuxRacer69TuxRacer69
    Nov 11, 2009 at 11:24 am
    Nov 12, 2009 at 7:46 pm
  • I'm experiencing a scenario whereby long-running MapReduce tasks appear to be taking RegionServers down, wondering if 1) anyone else is experiencing this 2) this is expected behaviour, and if so, 3) ...
    Joost OuwerkerkJoost Ouwerkerk
    Nov 26, 2009 at 4:31 pm
    Dec 7, 2009 at 7:31 pm
  • Hi, everyone. Is there someone who uses map-reduce to store the reduce output in memory. I mean, now the output path of job is set and reduce outputs are stored into files under this path.(see the ...
    Liu XianglongLiu Xianglong
    Nov 27, 2009 at 1:42 pm
    Nov 28, 2009 at 6:49 am
  • Hi all , I have entered the following command from hbase 'shell' Previously it worked fine .. But i have played with this table using some java codes .. I think something might have gone wrong while ...
    Bharath vBharath v
    Nov 17, 2009 at 2:44 pm
    Nov 17, 2009 at 6:42 pm
  • Hello Hbase Users! I am trying to find some pointers on how to configure hbase region server and in particular how the disk will be filled on each node. Say for instance that I have a small cluster ...
    Tux RacerTux Racer
    Nov 26, 2009 at 7:14 pm
    Nov 27, 2009 at 12:56 pm
  • Hello , We were trying to use the src/contrib/ec2 scripts. All the instances started well, but from hbase shell, on the master , a " status 'simple' " listed 0 live servers. Also , we are not able to ...
    Naresh RapoluNaresh Rapolu
    Nov 19, 2009 at 5:51 am
    Nov 19, 2009 at 11:27 pm
  • I am using hadoop-20.1 with hbase-20.1. I am able to create,list,scan rows/tables via hbase shell. This is the stacktrace from client side : 09/11/24 17:13:45 WARN ...
    Prasenjit mukherjeePrasenjit mukherjee
    Nov 24, 2009 at 12:34 pm
    Nov 24, 2009 at 9:13 pm
  • Hi , i have a large data sized 27G to insert into hbase whith one regionserver. and i used mapreduce to insert the data. Whatever how much maps i used, how maps' thread to sleep to control the speed, ...
    梁景明梁景明
    Nov 11, 2009 at 9:45 am
    Nov 12, 2009 at 2:43 am
  • I have dumped all my data into Hbase using mapreduce the result shows i have processed 4,413,160 records But there are only 4217742 rows in the table(count by rowcounter) dump: Map input records ...
    Eason.LeeEason.Lee
    Nov 5, 2009 at 6:09 am
    Nov 8, 2009 at 1:53 am
  • Here's a few random notes cut from a private correspondence with Andrew Purtell on crawling. With Andrew's permission I'm forwarding to the list. It might be of use to others trying to crawl into ...
    StackStack
    Nov 24, 2009 at 6:54 am
    Dec 5, 2009 at 9:41 pm
  • True statements? Lies? Certainly missing crucial points! But worth watching . http://www.youtube.com/watch?v=LhnGarRsKnA -- Kind regards, Wim Van Leuven
    Wim Van LeuvenWim Van Leuven
    Nov 26, 2009 at 8:43 am
    Nov 26, 2009 at 10:38 am
  • Hi, everyone. I am focusing on improve data query performance from HBase and found that there are secondary index and lucene index built by mapreduce. I am not clear whether both index are the same. ...
    SallonchinaSallonchina
    Nov 23, 2009 at 6:04 am
    Nov 23, 2009 at 6:57 am
  • Hi, When HMaster assigns regions to region servers does it try to ensure that these files will be located on the same host in HDFS? It does not, does not it? So most likely HBase RegionServers are ...
    Igor KatkovIgor Katkov
    Nov 17, 2009 at 10:44 pm
    Nov 18, 2009 at 5:12 am
  • HBase has started throwing WrongRegionExceptions at me when trying to access certain regions. I'm guessing that the META table has somehow gone out of sync with reality. I've tried compacting and ...
    Joost OuwerkerkJoost Ouwerkerk
    Nov 4, 2009 at 10:25 pm
    Nov 6, 2009 at 12:08 am
  • Hi to everyone in the forum! I'm getting started with HBase 0.20.1 and I'm trying to prepare dev environment for web application development based on HBase as storage. In my test desktop java ...
    Sławek TrybusSławek Trybus
    Nov 2, 2009 at 11:39 am
    Nov 5, 2009 at 2:35 pm
  • I have a question regarding the durability of HBase. After I have put a record to HBase and have received a confirmation of the put from the region server (assuming both autoFlush and writeToWAL are ...
    JQ HadoopJQ Hadoop
    Nov 30, 2009 at 8:18 am
    Dec 1, 2009 at 3:41 am
  • Hi all, The following code run without exception, but it output nothing. And if I remove the red code , it will output records. So does it because of connection time out ? If so, it should throw ...
    Jeff ZhangJeff Zhang
    Nov 30, 2009 at 10:35 am
    Dec 1, 2009 at 2:17 am
  • Hi, I'm looking for a simple way to rename a column (not a column family). Is there any ?
    Vincent BaratVincent Barat
    Nov 27, 2009 at 2:27 pm
    Nov 27, 2009 at 3:32 pm
  • I have another "schema design" question. I hope you don't mind. My data are key-value pairs (tags on domain elements) with "key" and "value" being strings. Now I've got a "keys" table with a column ...
    Lars FranckeLars Francke
    Nov 24, 2009 at 5:22 pm
    Nov 26, 2009 at 12:29 pm
  • Hi Everyone- I'm implementing a new data layer and am struggling to decide between HBase and Cassandra. The primary advantages of HBase as far as I can tell are: 1) Tighter integration with Hadoop, ...
    Adam FiskAdam Fisk
    Nov 23, 2009 at 7:34 pm
    Nov 23, 2009 at 11:57 pm
  • hbase 0.20.2 is available for download: http://hbase.org/releases.html. Forty issues have been addressed since hbase 0.20.1. The release notes are available here: http://su.pr/1nnhl5. Please upgrade ...
    Jean-Daniel CryansJean-Daniel Cryans
    Nov 19, 2009 at 8:08 pm
    Nov 20, 2009 at 11:33 pm
  • HI all , I have the data in the formats of '.jpg' and '.avi' .. I intend to store them in HBase ... Because Hbase treats everything as a stream of Bytes .. I think I need to convert them into Bytes ...
    Bharath vBharath v
    Nov 18, 2009 at 2:47 pm
    Nov 19, 2009 at 3:20 pm
  • In 0.20.x hbase, enable/disable of tables is unreliable as written. It will work when tables are small or we're in a unit test context where configuration makes messaging more lively but it quickly ...
    StackStack
    Nov 18, 2009 at 6:54 pm
    Nov 19, 2009 at 1:57 am
  • Hi We currently switch from HBase 0.19.3 to 0.20.1 and experience very slow inserts in comparison to 0.19.3. Inserting 10.000 rows with around 100 columns (pretty small content) per row takes around ...
    Peter RietzlerPeter Rietzler
    Nov 9, 2009 at 6:24 pm
    Nov 11, 2009 at 4:41 pm
  • im trying to run the hbase API usage example, and im getting an ExceptionInInitializerError could this be from an improperly configured log4j.properties file in my hadoop directory, or something to ...
    JpancierJpancier
    Nov 8, 2009 at 7:54 am
    Nov 9, 2009 at 2:30 pm
  • Hi, I wrote a Custom Comparator that implements WritableByteArrayComparable and used it in SingleColumnValueFilter as follows: new SingleColumnValueFilter(family, ...
    Karthik ManimaranKarthik Manimaran
    Nov 4, 2009 at 2:17 am
    Nov 6, 2009 at 3:27 am
  • I dont want to do scp from remote place to local and than local to hdfs. Is there any by that i can do scp from remote place to directly in hdfs ? -- View this message in context: ...
    JaydeepmailJaydeepmail
    Nov 3, 2009 at 6:37 am
    Nov 3, 2009 at 12:13 pm
  • Hello Hbase Users! I installed the Hbase distribution on a one node cluster (my test linux box) I wrote a small client that creates a table, and inset some data in it. Then if I do a pkill -9 java ...
    Tux RacerTux Racer
    Nov 26, 2009 at 10:53 am
    Nov 26, 2009 at 11:48 am
  • Hi! In the previous thread it is mentioned it is not recommended to use built-in secondary indexes (IndexedTable) and one should build its own secondary index instead. Could anyone comment on this? ...
    Kirill ShabunovKirill Shabunov
    Nov 23, 2009 at 9:14 am
    Nov 24, 2009 at 5:03 pm
  • Is the a way to just lock a family rather than an entire row? If not, has there ever been a discussion around this idea? The use case I am thinking of is around have de-normalized data, e.g. if a ...
    Keith ThomasKeith Thomas
    Nov 24, 2009 at 3:15 am
    Nov 24, 2009 at 3:41 am
  • Hi, Is there a way to specify a limit on number of returned records for scan? I don¹t see any way to do this when building the scan. If there is, that would be great. If not, what about when ...
    Adam SilbersteinAdam Silberstein
    Nov 20, 2009 at 7:44 pm
    Nov 20, 2009 at 8:35 pm
  • Hi all, I need some advice about zookeeper log. In my working environment, I have 3 active regionservers hbase0.20.1 and hbase.zookeeper.leaderport 3888 is open on all servers,and ...
    SadamichiSadamichi
    Nov 19, 2009 at 11:41 am
    Nov 20, 2009 at 6:07 pm
  • Anyone installed HBase on S3 (or EC2 for that matter)? Any pointers would be greatly appreciated. Thanks.
    Something SomethingSomething Something
    Nov 16, 2009 at 5:38 pm
    Nov 16, 2009 at 6:06 pm
  • Hi, I am setting up a simple hbase system. I currently have a 2 node clsuter server for the zookeeper servers ... I read that zookeeper needs a simple majority to recover from failures. So is 2 same ...
    Ishwar ramaniIshwar ramani
    Nov 11, 2009 at 12:34 am
    Nov 11, 2009 at 1:32 am
  • Hi, I noticed that there is a HBase Rest service which provides nice features that directly talks to HBase. Does it run MR under the hood? What is the difference between using normal MR to fetch the ...
    Zhenyu ZhongZhenyu Zhong
    Nov 10, 2009 at 9:02 pm
    Nov 10, 2009 at 9:33 pm
  • Does anybody know of a rubby wrapper for the stargate interface? Cheers, Mike
    Mike andersonMike anderson
    Nov 6, 2009 at 3:36 pm
    Nov 8, 2009 at 11:03 pm
  • Hi folks, I was trying to run the RowCounter example on my hadoop cluster. I followed the instructions at ...
    Antonio D'EttoleAntonio D'Ettole
    Nov 26, 2009 at 1:47 pm
    Nov 26, 2009 at 2:26 pm
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81 users for November 2009

Stack: 79 posts Jean-Daniel Cryans: 51 posts Zhenyu Zhong: 40 posts Andrew Purtell: 38 posts Ryan Rawson: 31 posts Mark Vigeant: 23 posts Jeff Zhang: 19 posts Chris Bates: 13 posts Lars George: 13 posts Murali Krishna. P: 13 posts Tatsuya Kawano: 12 posts Imran M Yousuf: 11 posts Liu Xianglong: 11 posts Vaibhav Puranik: 11 posts TuxRacer69: 10 posts Patrick Hunt: 8 posts Bharath v: 7 posts Joost Ouwerkerk: 6 posts Julien Ruchaud: 6 posts Zheng Lv: 6 posts
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