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From Sean Busbey <bus...@cloudera.com>
Subject Re: Measuring read latency with multiple threads
Date Thu, 07 Jan 2016 15:53:54 GMT
Can you either publish your client code or attempt to recreate the issue
using YCSB[1] to compare single threaded to multiple threads?

[1]: You should grab the HBase 1.y binding for the latest release. Right
now, that's


and the file


The general instructions for using the "hbase10" binding are the same as
those found here for 0.98:


On Thu, Jan 7, 2016 at 6:21 AM, Sreeram <sreeram.v@gmail.com> wrote:

> Hi,
>  I am trying to measure HBase read latency with concurrent users. I am
> doing this by starting multiple threads in a Java program and measuring the
> latency at a thread level.
> I was expecting a minor increase in per-thread latency - but I am observing
> that it is much more.
> For example, in non-threaded mode I got 10 ms for a read operation. On
> running with 100 threads, the whole work load complete in roughly 1 sec.
> And every thread takes close to 1 second for end to end execution (all
> threads seem to start and end at the same time).
> I will appreciate any input that will help me understand this.
> Thank you.
> Sreeram


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