Andrey,
thanks. You are right that I am using Thrift v1. I was following example
under : hbase-examples/src/main/cpp/DemoClient.cpp. It looks like pretty
old, and actually its scan example:
> scanner = client.scannerOpenWithStop(t, "00020", "00040", columnNames,
> dummyAttributes);
>
doesn't work
Sorry Demai, I have no access to that code currently.
But what you described seems that you use
thrift v1. I'd recommend to use thrift2.
Also it is a good idea to check thrift server configuration:
1. blocking/nonblocking/hsha, and framed or not
2. size of thread pool
On Mon, Mar 9, 2015 at 9:
Andrey and all,
thanks for the input. Andrey, if possible, do you mind share your code
segment so I can follow the setting on your side?
I have exactly the same thought when face the result first time. I was
expecting a little bit performance issue (10~20%) when using Thrift(C++),
and not as much
Hi Demai.
Thats seems odd for me, in my tests I got very similar performance.
I'd like to suggest to check that scans have identical parameters
(cache size in particular). That can bring very different performance
in you case.
Thanks.
On Sun, Mar 8, 2015 at 6:50 PM, Mike Axiak wrote:
> If you'
If you're going the JNI route, the best bet is to embed a VM in your C
project. You use "java -s -p" to create the required header files and
compile linking against the java library. This article talks about
how to talk from C to Java:
http://www.codeproject.com/Articles/22881/How-to-Call-Java-Fun
JNI example?
I don’t have one… my client’s own the code so I can’t take it with me and
share.
(The joys of being a consultant means you can’t take it with you and you need
to make sure you don’t xfer IP accidentally. )
Maybe in one of the HBase books? Or just google for a JNI example on the
Nick, thanks. I will give REST a try. However, if it use the same design,
the result probably will be the same.
Michael, I was thinking about the same thing through JNI. Is there an
example I can follow?
Mike (Axiak), I run the C++ client on the same linux machine as the hbase
and thrift. The HBa
What if you install the thrift server locally on every C++ client
machine? I'd imagine performance should be similar to native java
performance at that point.
-Mike
On Sat, Mar 7, 2015 at 4:49 PM, Michael Segel wrote:
> Or you could try a java connection wrapped by JNI so you can call it from
>
Or you could try a java connection wrapped by JNI so you can call it from your
C++ app.
> On Mar 7, 2015, at 1:00 PM, Nick Dimiduk wrote:
>
> You can try the REST gateway, though it has the same basic architecture as
> the thrift gateway. May be the details work out in your favor over rest.
>
You can try the REST gateway, though it has the same basic architecture as
the thrift gateway. May be the details work out in your favor over rest.
On Fri, Mar 6, 2015 at 11:31 PM, nidmgg wrote:
> Stack,
>
> Thanks for the quick response. Well, the extra layer really kill the
> Performance. The
Stack,
Thanks for the quick response. Well, the extra layer really kill the
Performance. The 'hop' is so expensive
Is there another C/C++ api to try out? I saw there is a jira Hbase-1015, but
was inactive for a while.
Demai
Stack wrote:
>Is it because of the 'hop'? Java goes against RS.
Is it because of the 'hop'? Java goes against RS. The thrift C++ goes to a
thriftserver which hosts a java client and then it goes to the RS?
St.Ack
On Fri, Mar 6, 2015 at 4:46 PM, Demai Ni wrote:
> hi, guys,
>
> I am trying to get a rough idea about the performance comparison between
> c++ and
hi, guys,
I am trying to get a rough idea about the performance comparison between
c++ and java client when access HBase table, and is surprised to find out
that Thrift (c++) is 4X slower
The performance result is:
C++: real*16m11.313s*; user5m3.642s; sys2m21.388s
Java: real*4m6.
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