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From y_823...@tsmc.com
Subject Re: The correct way to increase HBase clients
Date Wed, 17 Mar 2010 03:40:37 GMT
It seems there is only one connection in a process, no matter how many
HTabele instance you created in thread.
Is it correct? So these clients in a one process can't run in parallel.

Fleming Chiu(邱宏明)
週一無肉日吃素救地球(Meat Free Monday Taiwan)

                      om                       To:      hbase-user@hadoop.apache.org     
                      Sent by:                 cc:      (bcc: Y_823910/TSMC)             
                      saint.ack@gmail.c        Subject: Re: The correct way to increase HBase
                      2010/03/17 11:25                                                   
                      Please respond to                                                  

2010/3/16  <y_823910@tsmc.com>:
> Hi,
> We want to start 100 HBase clients to fetch data from HBase concurrently.
> There are 20 machines, each machine has one AP with 5 multithread hbase
> clients
> or create 5 individual ?process will be correct?

Either works?  If 5 clients in the one vm, they'll share location
data.  If separate they'll not contend.

> And any ways that I can check the count connecting to HBase.

We don't emit that kinda of data.   We don't keep up a client session
such that we might uniquely identify connecting clients either.  Can
you have your clients do a fixed amount of work and then have them
emit at the end yes or no if they completed their allotment?


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