ANN: libcouchbase 2.3.0

[Mark Nunberg]

Hi All,

I'm glad to announce that we released the Couchbase C Client version 2.3.0. This is a minor release. Most notably, It adds

* CCCP Support
* Enhanced efficiency during topology changes
* Logging
* Error classifiers


http://www.couchbase.com/communities/c/getting-started

Regards,

Mark Nunberg

[Zhichao Zhou]

we have tested 2.3.0 on server 2.5.0 which locate in another datacenter in same town , ops is very low compared to libcouchbase 2.2.0

[Matt Ingenthron]

What kind of operations?  Also, is your app written in C or are you using a higher level language like pho?

Matt

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[Zhichao]

we app write in c++ using libcouchbase, ops are both writes and reads,

it throughput decrease great both in wirte and read if clients and servers in different datacenters.

our app build with libcouchbase 2.3.0 -> low throughput, build with libcouchbase 2.2.0-> high thoughput

all in same env which clients and servers in different datacenters

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Zhichao

[M. Nunberg]

Can you please describe a bit more the nature of how you are connecting
to the cluster with the library (i.e. how frequently are you creating a
new instance, are you using any special I/O plugins or integration
models), etc.

Also, which version of the cluster are you using?

On 04/28/2014 01:17 AM, Zhichao wrote:
> we app write in c++ using libcouchbase, ops are both writes and reads,
> it throughput decrease great both in wirte and read if clients and
> servers in different datacenters.
> our app build with libcouchbase 2.3.0 -> low throughput, build with
> libcouchbase 2.2.0-> high thoughput
> all in same env which clients and servers in different datacenters
>
>
> On Fri, Apr 25, 2014 at 9:38 PM, Matt Ingenthron <ma...@couchbase.com
> <mailto:ma...@couchbase.com>> wrote:
>
> What kind of operations? Also, is your app written in C or are you
> using a higher level language like pho?
>
> Matt
>
> On Apr 25, 2014 1:57 AM, Zhichao Zhou <zhou...@gmail.com

> <mailto:zhou...@gmail.com>> wrote:
> we have tested 2.3.0 on server 2.5.0 which locate in another
> datacenter in same town , ops is very low compared to libcouchbase 2.2.0
>
> On Thursday, April 10, 2014 1:30:12 PM UTC+8, M. Nunberg wrote:
>
> Hi All,
>
> I'm glad to announce that we released the Couchbase C Client
> version 2.3.0. This is a minor release. Most notably, It adds
>
> * CCCP Support
> * Enhanced efficiency during topology changes
> * Logging
> * Error classifiers
>
>

> http://www.couchbase.com/__communities/c/getting-started

> <http://www.couchbase.com/communities/c/getting-started>
>
> Regards,
>
> Mark Nunberg
>
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>
>
>
> --
> Zhichao
>

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[Zhichao]

we have 10 threads , each hold a connection to server, each thread only read or write, but their is no relationship for any cases, we change thread num, share connection handle .etc. all has the same result. and the comparision is the same condition with different libcouchbase lib.

we are using couchbase 2.5.0 server.

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Zhichao

[Zhichao]

btw, why not epoll in libcouchbase instead of select?

--
Zhichao

[M. Nunberg]

Hi. Epoll is utilized by means of libevent and libe  plugins. Select is implemented as a fallback in case those libraries are not available.

In any event, a noticeable performance different should only be visible with many nodes.

Sent via the Samsung Galaxy S™III, an AT&T 4G LTE smartphone

-------- Original message --------
From: Zhichao <zhou...@gmail.com>
Date: 05/05/2014 3:29 AM (GMT-08:00)
To: couc...@googlegroups.com
Subject: Re: ANN: libcouchbase 2.3.0

[Zhichao]

ok , i find it is via libevent

how many nodes you could be visible? we tested on cluster of 10, anyway, we reported a performance issue, it depends on you.

we rolled back to libcouchbase 2.2.0 

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Zhichao

[Mark Nunberg]

Once you start getting into the realm of 10 or so nodes, I'd expect select to start slowing down a bit.

We also resolved a performance issue with select (http://www.couchbase.com/issues/browse/CCBC-407) which would have also caused a slowdown. I'd ask that you try 2.3.1 and see how that works for you.

Mark

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[Zhichao]

btw, do you have performance test on libcouchbase 2.2.0 when we have cluster larger than 30, since we got all read only 8k with 1k value and all write with high lentency like 10s , do you know why?