Re: How and where exactly LSM trees are used in HBase?

Searching for 'lsm tree hbase' would give you several articles. I am in China - the search results are mostly in Chinese. You should be able to read this: http://stackoverflow.com/questions/13762992/log-structured-merge-tree-in-hbase Cheers On Wed, Dec 4, 2013 at 6:49 PM, AnilKumar B wrote:

Re: Does HBase Java Client compatible to all the hbase distributions?

Hi, Please read Chapter 3 of the refguide starting with the following: http://hbase.apache.org/book.html#hbase.binary.compatibility Cheers On Fri, Dec 6, 2013 at 12:42 PM, jingych wrote: > Hi, All! > > Does HBase Java Client compatible to all the hbase distributions? > If don't，how to disting

Re: hbase rest query params for maxVersions and maxValues

Koert: Thanks for reporting this issue. Mind filing a JIRA ? Cheers On Sun, Dec 8, 2013 at 2:01 AM, Koert Kuipers wrote: > i am trying to use maxValues with a "globbed" row resource in stargate. > from looking at the source code one has to do something like > > table/row/column(s)/timestamp(s

Re: Remote java client hang

No, I didn't. What's that for? I just followed this guide: http://archive.cloudera.com/cdh/3/hbase/client_dependencies.html Meanwhile, I have another question. My hbase cluster is running in a inner-network. All master and slaves hostnames are resolved to LAN ip like this: master 192.168.1.2 sl

hbase rest query params for maxVersions and maxValues

i am trying to use maxValues with a "globbed" row resource in stargate. from looking at the source code one has to do something like table/row/column(s)/timestamp(s)/?n=1 (except the ?n=1 piece must be urlencoded) however i cannot get the n=1 piece to work. i get this stacktrace: Problem access

Re: HTable writeAsyncBuffer

hey st.ack well i am considering creating lots of deletes from a map-reduce job instead of puts, and was looking at the code to see how efficient that would be... but now i am more generally wondering if there is any downside to making all these operations go into the buffer instead of treating p

Re: RPC - Queue Time when handlers are all waiting

I'd look into the RS logs to see whats happening there. Difficult to guess from the given information! On Sat, Dec 7, 2013 at 8:52 PM, Federico Gaule wrote: > Any clue? > El dic 5, 2013 9:49 a.m., "Federico Gaule" escribió: > > > Hi, > > > > I have 2 clusters, Master (a) - Slave (b) replicatio

Re: RPC - Queue Time when handlers are all waiting

Any clue? El dic 5, 2013 9:49 a.m., "Federico Gaule" escribió: > Hi, > > I have 2 clusters, Master (a) - Slave (b) replication. > B doesn't have client write or reads, all handlers (100) are waiting but > rpc.metrics.RpcQueueTime_num_ops and rpc.metrics.RpcQueueTime_avg_time reports > to be rpc c

Re: How to convert SequenceFile into HFile?

Hi JM, My usage is the following: I want to write a C++ program which will answer RPC requests. Each request has a list of keys and responses will contain values. I want to use HFile because it has an efficient key-based index and because there is a whole set of tools in hadoop to produce this kin

Re: HTable writeAsyncBuffer

On Fri, Dec 6, 2013 at 3:06 PM, Koert Kuipers wrote > i noticed that puts are put into a bugger (writeAsyncBuffer) that gets > flushed if it gets to a certain size. > writeAsyncBuffer can take objects of type Row, which includes besides the > Put also Deletes, Appends, and RowMutations. > > but

Re: What is HBase compaction-queue-size at all?

> So I think it includes both running compactions and those in queue. Am I missing something? Yes, that's correct. A major is just a compaction running on all the regions. So a region server will count it like a compaction. But it can also be a minor that the RS is seeing. So not necessary a major