Re: [ANNOUNCE] New committer: Onur Karaman

[Jason Gustafson]

Sorry for being late to the party, but congratulations Onur!



On Wed, Nov 8, 2017 at 1:47 AM, Sandeep Nemuri  wrote:

> Congratulations Onur!!
>
> On Wed, Nov 8, 2017 at 9:19 AM, UMESH CHAUDHARY 
> wrote:
>
> > Congratulations Onur!
> >
> > On Tue, 7 Nov 2017 at 21:44 Jun Rao  wrote:
> >
> > > Affan,
> > >
> > > All known problems in the controller are described in the doc linked
> from
> > > https://issues.apache.org/jira/browse/KAFKA-5027.
> > >
> > > Thanks,
> > >
> > > Jun
> > >
> > > On Mon, Nov 6, 2017 at 11:00 PM, Affan Syed  wrote:
> > >
> > > > Congrats Onur,
> > > >
> > > > Can you also share the document where all known problems are listed;
> I
> > am
> > > > assuming these bugs are still valid for the current stable release.
> > > >
> > > > Affan
> > > >
> > > > - Affan
> > > >
> > > > On Mon, Nov 6, 2017 at 10:24 PM, Jun Rao  wrote:
> > > >
> > > > > Hi, everyone,
> > > > >
> > > > > The PMC of Apache Kafka is pleased to announce a new Kafka
> committer
> > > Onur
> > > > > Karaman.
> > > > >
> > > > > Onur's most significant work is the improvement of Kafka
> controller,
> > > > which
> > > > > is the brain of a Kafka cluster. Over time, we have accumulated
> > quite a
> > > > few
> > > > > correctness and performance issues in the controller. There have
> been
> > > > > attempts to fix controller issues in isolation, which would make
> the
> > > code
> > > > > base more complicated without a clear path of solving all problems.
> > > Onur
> > > > is
> > > > > the one who took a holistic approach, by first documenting all
> known
> > > > > issues, writing down a new design, coming up with a plan to deliver
> > the
> > > > > changes in phases and executing on it. At this point, Onur has
> > > completed
> > > > > the two most important phases: making the controller single
> threaded
> > > and
> > > > > changing the controller to use the async ZK api. The former fixed
> > > > multiple
> > > > > deadlocks and race conditions. The latter significantly improved
> the
> > > > > performance when there are many partitions. Experimental results
> show
> > > > that
> > > > > Onur's work reduced the controlled shutdown time by a factor of 100
> > > times
> > > > > and the controller failover time by a factor of 3 times.
> > > > >
> > > > > Congratulations, Onur!
> > > > >
> > > > > Thanks,
> > > > >
> > > > > Jun (on behalf of the Apache Kafka PMC)
> > > > >
> > > >
> > >
> >
>
>
>
> --
> *  Regards*
> *  Sandeep Nemuri*
>

Re: [ANNOUNCE] New committer: Onur Karaman

[Sandeep Nemuri]

Congratulations Onur!!

On Wed, Nov 8, 2017 at 9:19 AM, UMESH CHAUDHARY  wrote:

> Congratulations Onur!
>
> On Tue, 7 Nov 2017 at 21:44 Jun Rao  wrote:
>
> > Affan,
> >
> > All known problems in the controller are described in the doc linked from
> > https://issues.apache.org/jira/browse/KAFKA-5027.
> >
> > Thanks,
> >
> > Jun
> >
> > On Mon, Nov 6, 2017 at 11:00 PM, Affan Syed  wrote:
> >
> > > Congrats Onur,
> > >
> > > Can you also share the document where all known problems are listed; I
> am
> > > assuming these bugs are still valid for the current stable release.
> > >
> > > Affan
> > >
> > > - Affan
> > >
> > > On Mon, Nov 6, 2017 at 10:24 PM, Jun Rao  wrote:
> > >
> > > > Hi, everyone,
> > > >
> > > > The PMC of Apache Kafka is pleased to announce a new Kafka committer
> > Onur
> > > > Karaman.
> > > >
> > > > Onur's most significant work is the improvement of Kafka controller,
> > > which
> > > > is the brain of a Kafka cluster. Over time, we have accumulated
> quite a
> > > few
> > > > correctness and performance issues in the controller. There have been
> > > > attempts to fix controller issues in isolation, which would make the
> > code
> > > > base more complicated without a clear path of solving all problems.
> > Onur
> > > is
> > > > the one who took a holistic approach, by first documenting all known
> > > > issues, writing down a new design, coming up with a plan to deliver
> the
> > > > changes in phases and executing on it. At this point, Onur has
> > completed
> > > > the two most important phases: making the controller single threaded
> > and
> > > > changing the controller to use the async ZK api. The former fixed
> > > multiple
> > > > deadlocks and race conditions. The latter significantly improved the
> > > > performance when there are many partitions. Experimental results show
> > > that
> > > > Onur's work reduced the controlled shutdown time by a factor of 100
> > times
> > > > and the controller failover time by a factor of 3 times.
> > > >
> > > > Congratulations, Onur!
> > > >
> > > > Thanks,
> > > >
> > > > Jun (on behalf of the Apache Kafka PMC)
> > > >
> > >
> >
>



-- 
*  Regards*
*  Sandeep Nemuri*

Re: [ANNOUNCE] New committer: Onur Karaman

[UMESH CHAUDHARY]

Congratulations Onur!

On Tue, 7 Nov 2017 at 21:44 Jun Rao  wrote:

> Affan,
>
> All known problems in the controller are described in the doc linked from
> https://issues.apache.org/jira/browse/KAFKA-5027.
>
> Thanks,
>
> Jun
>
> On Mon, Nov 6, 2017 at 11:00 PM, Affan Syed  wrote:
>
> > Congrats Onur,
> >
> > Can you also share the document where all known problems are listed; I am
> > assuming these bugs are still valid for the current stable release.
> >
> > Affan
> >
> > - Affan
> >
> > On Mon, Nov 6, 2017 at 10:24 PM, Jun Rao  wrote:
> >
> > > Hi, everyone,
> > >
> > > The PMC of Apache Kafka is pleased to announce a new Kafka committer
> Onur
> > > Karaman.
> > >
> > > Onur's most significant work is the improvement of Kafka controller,
> > which
> > > is the brain of a Kafka cluster. Over time, we have accumulated quite a
> > few
> > > correctness and performance issues in the controller. There have been
> > > attempts to fix controller issues in isolation, which would make the
> code
> > > base more complicated without a clear path of solving all problems.
> Onur
> > is
> > > the one who took a holistic approach, by first documenting all known
> > > issues, writing down a new design, coming up with a plan to deliver the
> > > changes in phases and executing on it. At this point, Onur has
> completed
> > > the two most important phases: making the controller single threaded
> and
> > > changing the controller to use the async ZK api. The former fixed
> > multiple
> > > deadlocks and race conditions. The latter significantly improved the
> > > performance when there are many partitions. Experimental results show
> > that
> > > Onur's work reduced the controlled shutdown time by a factor of 100
> times
> > > and the controller failover time by a factor of 3 times.
> > >
> > > Congratulations, Onur!
> > >
> > > Thanks,
> > >
> > > Jun (on behalf of the Apache Kafka PMC)
> > >
> >
>

Re: [ANNOUNCE] New committer: Onur Karaman

[Jun Rao]

Affan,

All known problems in the controller are described in the doc linked from
https://issues.apache.org/jira/browse/KAFKA-5027.

Thanks,

Jun

On Mon, Nov 6, 2017 at 11:00 PM, Affan Syed  wrote:

> Congrats Onur,
>
> Can you also share the document where all known problems are listed; I am
> assuming these bugs are still valid for the current stable release.
>
> Affan
>
> - Affan
>
> On Mon, Nov 6, 2017 at 10:24 PM, Jun Rao  wrote:
>
> > Hi, everyone,
> >
> > The PMC of Apache Kafka is pleased to announce a new Kafka committer Onur
> > Karaman.
> >
> > Onur's most significant work is the improvement of Kafka controller,
> which
> > is the brain of a Kafka cluster. Over time, we have accumulated quite a
> few
> > correctness and performance issues in the controller. There have been
> > attempts to fix controller issues in isolation, which would make the code
> > base more complicated without a clear path of solving all problems. Onur
> is
> > the one who took a holistic approach, by first documenting all known
> > issues, writing down a new design, coming up with a plan to deliver the
> > changes in phases and executing on it. At this point, Onur has completed
> > the two most important phases: making the controller single threaded and
> > changing the controller to use the async ZK api. The former fixed
> multiple
> > deadlocks and race conditions. The latter significantly improved the
> > performance when there are many partitions. Experimental results show
> that
> > Onur's work reduced the controlled shutdown time by a factor of 100 times
> > and the controller failover time by a factor of 3 times.
> >
> > Congratulations, Onur!
> >
> > Thanks,
> >
> > Jun (on behalf of the Apache Kafka PMC)
> >
>

Re: [ANNOUNCE] New committer: Onur Karaman

[Affan Syed]

Congrats Onur,

Can you also share the document where all known problems are listed; I am
assuming these bugs are still valid for the current stable release.

Affan

- Affan

On Mon, Nov 6, 2017 at 10:24 PM, Jun Rao  wrote:

> Hi, everyone,
>
> The PMC of Apache Kafka is pleased to announce a new Kafka committer Onur
> Karaman.
>
> Onur's most significant work is the improvement of Kafka controller, which
> is the brain of a Kafka cluster. Over time, we have accumulated quite a few
> correctness and performance issues in the controller. There have been
> attempts to fix controller issues in isolation, which would make the code
> base more complicated without a clear path of solving all problems. Onur is
> the one who took a holistic approach, by first documenting all known
> issues, writing down a new design, coming up with a plan to deliver the
> changes in phases and executing on it. At this point, Onur has completed
> the two most important phases: making the controller single threaded and
> changing the controller to use the async ZK api. The former fixed multiple
> deadlocks and race conditions. The latter significantly improved the
> performance when there are many partitions. Experimental results show that
> Onur's work reduced the controlled shutdown time by a factor of 100 times
> and the controller failover time by a factor of 3 times.
>
> Congratulations, Onur!
>
> Thanks,
>
> Jun (on behalf of the Apache Kafka PMC)
>

Re: [ANNOUNCE] New committer: Onur Karaman

[Paolo Patierno]

Congrats Onur ! Well deserved !


Paolo Patierno
Senior Software Engineer (IoT) @ Red Hat
Microsoft MVP on Azure & IoT
Microsoft Azure Advisor

Twitter : @ppatierno<http://twitter.com/ppatierno>
Linkedin : paolopatierno<http://it.linkedin.com/in/paolopatierno>
Blog : DevExperience<http://paolopatierno.wordpress.com/>



From: Viktor Somogyi <viktorsomo...@gmail.com>
Sent: Tuesday, November 7, 2017 11:34 AM
To: dev@kafka.apache.org
Subject: Re: [ANNOUNCE] New committer: Onur Karaman

Congrats Onur!

On Tue, Nov 7, 2017 at 9:17 AM, Tom Bentley <t.j.bent...@gmail.com> wrote:

> Well done Onur.
>
> On 7 November 2017 at 06:52, Jorge Esteban Quilcate Otoya <
> quilcate.jo...@gmail.com> wrote:
>
> > Congratulations Onur!!
> > On Tue, 7 Nov 2017 at 06:30, Jaikiran Pai <jai.forums2...@gmail.com>
> > wrote:
> >
> > > Congratulations Onur!
> > >
> > > -Jaikiran
> > >
> > >
> > > On 06/11/17 10:54 PM, Jun Rao wrote:
> > > > Hi, everyone,
> > > >
> > > > The PMC of Apache Kafka is pleased to announce a new Kafka committer
> > Onur
> > > > Karaman.
> > > >
> > > > Onur's most significant work is the improvement of Kafka controller,
> > > which
> > > > is the brain of a Kafka cluster. Over time, we have accumulated
> quite a
> > > few
> > > > correctness and performance issues in the controller. There have been
> > > > attempts to fix controller issues in isolation, which would make the
> > code
> > > > base more complicated without a clear path of solving all problems.
> > Onur
> > > is
> > > > the one who took a holistic approach, by first documenting all known
> > > > issues, writing down a new design, coming up with a plan to deliver
> the
> > > > changes in phases and executing on it. At this point, Onur has
> > completed
> > > > the two most important phases: making the controller single threaded
> > and
> > > > changing the controller to use the async ZK api. The former fixed
> > > multiple
> > > > deadlocks and race conditions. The latter significantly improved the
> > > > performance when there are many partitions. Experimental results show
> > > that
> > > > Onur's work reduced the controlled shutdown time by a factor of 100
> > times
> > > > and the controller failover time by a factor of 3 times.
> > > >
> > > > Congratulations, Onur!
> > > >
> > > > Thanks,
> > > >
> > > > Jun (on behalf of the Apache Kafka PMC)
> > > >
> > >
> > >
> >
>

Re: [ANNOUNCE] New committer: Onur Karaman

[Viktor Somogyi]

Congrats Onur!

On Tue, Nov 7, 2017 at 9:17 AM, Tom Bentley  wrote:

> Well done Onur.
>
> On 7 November 2017 at 06:52, Jorge Esteban Quilcate Otoya <
> quilcate.jo...@gmail.com> wrote:
>
> > Congratulations Onur!!
> > On Tue, 7 Nov 2017 at 06:30, Jaikiran Pai 
> > wrote:
> >
> > > Congratulations Onur!
> > >
> > > -Jaikiran
> > >
> > >
> > > On 06/11/17 10:54 PM, Jun Rao wrote:
> > > > Hi, everyone,
> > > >
> > > > The PMC of Apache Kafka is pleased to announce a new Kafka committer
> > Onur
> > > > Karaman.
> > > >
> > > > Onur's most significant work is the improvement of Kafka controller,
> > > which
> > > > is the brain of a Kafka cluster. Over time, we have accumulated
> quite a
> > > few
> > > > correctness and performance issues in the controller. There have been
> > > > attempts to fix controller issues in isolation, which would make the
> > code
> > > > base more complicated without a clear path of solving all problems.
> > Onur
> > > is
> > > > the one who took a holistic approach, by first documenting all known
> > > > issues, writing down a new design, coming up with a plan to deliver
> the
> > > > changes in phases and executing on it. At this point, Onur has
> > completed
> > > > the two most important phases: making the controller single threaded
> > and
> > > > changing the controller to use the async ZK api. The former fixed
> > > multiple
> > > > deadlocks and race conditions. The latter significantly improved the
> > > > performance when there are many partitions. Experimental results show
> > > that
> > > > Onur's work reduced the controlled shutdown time by a factor of 100
> > times
> > > > and the controller failover time by a factor of 3 times.
> > > >
> > > > Congratulations, Onur!
> > > >
> > > > Thanks,
> > > >
> > > > Jun (on behalf of the Apache Kafka PMC)
> > > >
> > >
> > >
> >
>

Re: [ANNOUNCE] New committer: Onur Karaman

[Tom Bentley]

Well done Onur.

On 7 November 2017 at 06:52, Jorge Esteban Quilcate Otoya <
quilcate.jo...@gmail.com> wrote:

> Congratulations Onur!!
> On Tue, 7 Nov 2017 at 06:30, Jaikiran Pai 
> wrote:
>
> > Congratulations Onur!
> >
> > -Jaikiran
> >
> >
> > On 06/11/17 10:54 PM, Jun Rao wrote:
> > > Hi, everyone,
> > >
> > > The PMC of Apache Kafka is pleased to announce a new Kafka committer
> Onur
> > > Karaman.
> > >
> > > Onur's most significant work is the improvement of Kafka controller,
> > which
> > > is the brain of a Kafka cluster. Over time, we have accumulated quite a
> > few
> > > correctness and performance issues in the controller. There have been
> > > attempts to fix controller issues in isolation, which would make the
> code
> > > base more complicated without a clear path of solving all problems.
> Onur
> > is
> > > the one who took a holistic approach, by first documenting all known
> > > issues, writing down a new design, coming up with a plan to deliver the
> > > changes in phases and executing on it. At this point, Onur has
> completed
> > > the two most important phases: making the controller single threaded
> and
> > > changing the controller to use the async ZK api. The former fixed
> > multiple
> > > deadlocks and race conditions. The latter significantly improved the
> > > performance when there are many partitions. Experimental results show
> > that
> > > Onur's work reduced the controlled shutdown time by a factor of 100
> times
> > > and the controller failover time by a factor of 3 times.
> > >
> > > Congratulations, Onur!
> > >
> > > Thanks,
> > >
> > > Jun (on behalf of the Apache Kafka PMC)
> > >
> >
> >
>

Re: [ANNOUNCE] New committer: Onur Karaman

[Jorge Esteban Quilcate Otoya]

Congratulations Onur!!
On Tue, 7 Nov 2017 at 06:30, Jaikiran Pai  wrote:

> Congratulations Onur!
>
> -Jaikiran
>
>
> On 06/11/17 10:54 PM, Jun Rao wrote:
> > Hi, everyone,
> >
> > The PMC of Apache Kafka is pleased to announce a new Kafka committer Onur
> > Karaman.
> >
> > Onur's most significant work is the improvement of Kafka controller,
> which
> > is the brain of a Kafka cluster. Over time, we have accumulated quite a
> few
> > correctness and performance issues in the controller. There have been
> > attempts to fix controller issues in isolation, which would make the code
> > base more complicated without a clear path of solving all problems. Onur
> is
> > the one who took a holistic approach, by first documenting all known
> > issues, writing down a new design, coming up with a plan to deliver the
> > changes in phases and executing on it. At this point, Onur has completed
> > the two most important phases: making the controller single threaded and
> > changing the controller to use the async ZK api. The former fixed
> multiple
> > deadlocks and race conditions. The latter significantly improved the
> > performance when there are many partitions. Experimental results show
> that
> > Onur's work reduced the controlled shutdown time by a factor of 100 times
> > and the controller failover time by a factor of 3 times.
> >
> > Congratulations, Onur!
> >
> > Thanks,
> >
> > Jun (on behalf of the Apache Kafka PMC)
> >
>
>

Re: [ANNOUNCE] New committer: Onur Karaman

[Jaikiran Pai]

Congratulations Onur!

-Jaikiran


On 06/11/17 10:54 PM, Jun Rao wrote:

Hi, everyone,

The PMC of Apache Kafka is pleased to announce a new Kafka committer Onur
Karaman.

Onur's most significant work is the improvement of Kafka controller, which
is the brain of a Kafka cluster. Over time, we have accumulated quite a few
correctness and performance issues in the controller. There have been
attempts to fix controller issues in isolation, which would make the code
base more complicated without a clear path of solving all problems. Onur is
the one who took a holistic approach, by first documenting all known
issues, writing down a new design, coming up with a plan to deliver the
changes in phases and executing on it. At this point, Onur has completed
the two most important phases: making the controller single threaded and
changing the controller to use the async ZK api. The former fixed multiple
deadlocks and race conditions. The latter significantly improved the
performance when there are many partitions. Experimental results show that
Onur's work reduced the controlled shutdown time by a factor of 100 times
and the controller failover time by a factor of 3 times.

Congratulations, Onur!

Thanks,

Jun (on behalf of the Apache Kafka PMC)

Re: [ANNOUNCE] New committer: Onur Karaman

[Onur Karaman]

Thanks everyone!

On Mon, Nov 6, 2017 at 3:31 PM, Becket Qin  wrote:

> Congrats, Onur!
>
> On Mon, Nov 6, 2017 at 2:45 PM, James Cheng  wrote:
>
> > Congrats Onur! Well deserved!
> >
> > -James
> >
> > > On Nov 6, 2017, at 9:24 AM, Jun Rao  wrote:
> > >
> > > Hi, everyone,
> > >
> > > The PMC of Apache Kafka is pleased to announce a new Kafka committer
> Onur
> > > Karaman.
> > >
> > > Onur's most significant work is the improvement of Kafka controller,
> > which
> > > is the brain of a Kafka cluster. Over time, we have accumulated quite a
> > few
> > > correctness and performance issues in the controller. There have been
> > > attempts to fix controller issues in isolation, which would make the
> code
> > > base more complicated without a clear path of solving all problems.
> Onur
> > is
> > > the one who took a holistic approach, by first documenting all known
> > > issues, writing down a new design, coming up with a plan to deliver the
> > > changes in phases and executing on it. At this point, Onur has
> completed
> > > the two most important phases: making the controller single threaded
> and
> > > changing the controller to use the async ZK api. The former fixed
> > multiple
> > > deadlocks and race conditions. The latter significantly improved the
> > > performance when there are many partitions. Experimental results show
> > that
> > > Onur's work reduced the controlled shutdown time by a factor of 100
> times
> > > and the controller failover time by a factor of 3 times.
> > >
> > > Congratulations, Onur!
> > >
> > > Thanks,
> > >
> > > Jun (on behalf of the Apache Kafka PMC)
> >
> >
>

Re: [ANNOUNCE] New committer: Onur Karaman

[Becket Qin]

Congrats, Onur!

On Mon, Nov 6, 2017 at 2:45 PM, James Cheng  wrote:

> Congrats Onur! Well deserved!
>
> -James
>
> > On Nov 6, 2017, at 9:24 AM, Jun Rao  wrote:
> >
> > Hi, everyone,
> >
> > The PMC of Apache Kafka is pleased to announce a new Kafka committer Onur
> > Karaman.
> >
> > Onur's most significant work is the improvement of Kafka controller,
> which
> > is the brain of a Kafka cluster. Over time, we have accumulated quite a
> few
> > correctness and performance issues in the controller. There have been
> > attempts to fix controller issues in isolation, which would make the code
> > base more complicated without a clear path of solving all problems. Onur
> is
> > the one who took a holistic approach, by first documenting all known
> > issues, writing down a new design, coming up with a plan to deliver the
> > changes in phases and executing on it. At this point, Onur has completed
> > the two most important phases: making the controller single threaded and
> > changing the controller to use the async ZK api. The former fixed
> multiple
> > deadlocks and race conditions. The latter significantly improved the
> > performance when there are many partitions. Experimental results show
> that
> > Onur's work reduced the controlled shutdown time by a factor of 100 times
> > and the controller failover time by a factor of 3 times.
> >
> > Congratulations, Onur!
> >
> > Thanks,
> >
> > Jun (on behalf of the Apache Kafka PMC)
>
>

Re: [ANNOUNCE] New committer: Onur Karaman

[James Cheng]

Congrats Onur! Well deserved!

-James

> On Nov 6, 2017, at 9:24 AM, Jun Rao  wrote:
> 
> Hi, everyone,
> 
> The PMC of Apache Kafka is pleased to announce a new Kafka committer Onur
> Karaman.
> 
> Onur's most significant work is the improvement of Kafka controller, which
> is the brain of a Kafka cluster. Over time, we have accumulated quite a few
> correctness and performance issues in the controller. There have been
> attempts to fix controller issues in isolation, which would make the code
> base more complicated without a clear path of solving all problems. Onur is
> the one who took a holistic approach, by first documenting all known
> issues, writing down a new design, coming up with a plan to deliver the
> changes in phases and executing on it. At this point, Onur has completed
> the two most important phases: making the controller single threaded and
> changing the controller to use the async ZK api. The former fixed multiple
> deadlocks and race conditions. The latter significantly improved the
> performance when there are many partitions. Experimental results show that
> Onur's work reduced the controlled shutdown time by a factor of 100 times
> and the controller failover time by a factor of 3 times.
> 
> Congratulations, Onur!
> 
> Thanks,
> 
> Jun (on behalf of the Apache Kafka PMC)

Re: [ANNOUNCE] New committer: Onur Karaman

[Rajini Sivaram]

Congratulations, Onur!

On Mon, Nov 6, 2017 at 8:10 PM, Dong Lin  wrote:

> Congratulations Onur!
>
> On Mon, Nov 6, 2017 at 9:24 AM, Jun Rao  wrote:
>
> > Hi, everyone,
> >
> > The PMC of Apache Kafka is pleased to announce a new Kafka committer Onur
> > Karaman.
> >
> > Onur's most significant work is the improvement of Kafka controller,
> which
> > is the brain of a Kafka cluster. Over time, we have accumulated quite a
> few
> > correctness and performance issues in the controller. There have been
> > attempts to fix controller issues in isolation, which would make the code
> > base more complicated without a clear path of solving all problems. Onur
> is
> > the one who took a holistic approach, by first documenting all known
> > issues, writing down a new design, coming up with a plan to deliver the
> > changes in phases and executing on it. At this point, Onur has completed
> > the two most important phases: making the controller single threaded and
> > changing the controller to use the async ZK api. The former fixed
> multiple
> > deadlocks and race conditions. The latter significantly improved the
> > performance when there are many partitions. Experimental results show
> that
> > Onur's work reduced the controlled shutdown time by a factor of 100 times
> > and the controller failover time by a factor of 3 times.
> >
> > Congratulations, Onur!
> >
> > Thanks,
> >
> > Jun (on behalf of the Apache Kafka PMC)
> >
>

Re: [ANNOUNCE] New committer: Onur Karaman

[Dong Lin]

Congratulations Onur!

On Mon, Nov 6, 2017 at 9:24 AM, Jun Rao  wrote:

> Hi, everyone,
>
> The PMC of Apache Kafka is pleased to announce a new Kafka committer Onur
> Karaman.
>
> Onur's most significant work is the improvement of Kafka controller, which
> is the brain of a Kafka cluster. Over time, we have accumulated quite a few
> correctness and performance issues in the controller. There have been
> attempts to fix controller issues in isolation, which would make the code
> base more complicated without a clear path of solving all problems. Onur is
> the one who took a holistic approach, by first documenting all known
> issues, writing down a new design, coming up with a plan to deliver the
> changes in phases and executing on it. At this point, Onur has completed
> the two most important phases: making the controller single threaded and
> changing the controller to use the async ZK api. The former fixed multiple
> deadlocks and race conditions. The latter significantly improved the
> performance when there are many partitions. Experimental results show that
> Onur's work reduced the controlled shutdown time by a factor of 100 times
> and the controller failover time by a factor of 3 times.
>
> Congratulations, Onur!
>
> Thanks,
>
> Jun (on behalf of the Apache Kafka PMC)
>

Re: [ANNOUNCE] New committer: Onur Karaman

[Edoardo Comar]

Congratulations Onur !

--

Edoardo Comar

IBM Message Hub

IBM UK Ltd, Hursley Park, SO21 2JN



From:   Jun Rao <j...@confluent.io>
To: "dev@kafka.apache.org" <dev@kafka.apache.org>, 
"us...@kafka.apache.org" <us...@kafka.apache.org>
Date:   06/11/2017 17:24
Subject:    [ANNOUNCE] New committer: Onur Karaman



Hi, everyone,

The PMC of Apache Kafka is pleased to announce a new Kafka committer Onur
Karaman.

Onur's most significant work is the improvement of Kafka controller, which
is the brain of a Kafka cluster. Over time, we have accumulated quite a 
few
correctness and performance issues in the controller. There have been
attempts to fix controller issues in isolation, which would make the code
base more complicated without a clear path of solving all problems. Onur 
is
the one who took a holistic approach, by first documenting all known
issues, writing down a new design, coming up with a plan to deliver the
changes in phases and executing on it. At this point, Onur has completed
the two most important phases: making the controller single threaded and
changing the controller to use the async ZK api. The former fixed multiple
deadlocks and race conditions. The latter significantly improved the
performance when there are many partitions. Experimental results show that
Onur's work reduced the controlled shutdown time by a factor of 100 times
and the controller failover time by a factor of 3 times.

Congratulations, Onur!

Thanks,

Jun (on behalf of the Apache Kafka PMC)



Unless stated otherwise above:
IBM United Kingdom Limited - Registered in England and Wales with number 
741598. 
Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire PO6 3AU

Re: [ANNOUNCE] New committer: Onur Karaman

[Mickael Maison]

Congratulations Onur !

On Mon, Nov 6, 2017 at 7:01 PM, Matthias J. Sax <matth...@confluent.io> wrote:
> Congrats!!!
>
>
> On 11/6/17 7:56 PM, Vahid S Hashemian wrote:
>> Congrats Onur!
>>
>> --Vahid
>>
>>
>>
>> From:   Ismael Juma <ism...@juma.me.uk>
>> To: dev@kafka.apache.org
>> Cc: "us...@kafka.apache.org" <us...@kafka.apache.org>
>> Date:   11/06/2017 10:13 AM
>> Subject:Re: [ANNOUNCE] New committer: Onur Karaman
>> Sent by:isma...@gmail.com
>>
>>
>>
>> Congratulations Onur!
>>
>> Ismael
>>
>> On Mon, Nov 6, 2017 at 5:24 PM, Jun Rao <j...@confluent.io> wrote:
>>
>>> Hi, everyone,
>>>
>>> The PMC of Apache Kafka is pleased to announce a new Kafka committer
>> Onur
>>> Karaman.
>>>
>>> Onur's most significant work is the improvement of Kafka controller,
>> which
>>> is the brain of a Kafka cluster. Over time, we have accumulated quite a
>> few
>>> correctness and performance issues in the controller. There have been
>>> attempts to fix controller issues in isolation, which would make the
>> code
>>> base more complicated without a clear path of solving all problems. Onur
>> is
>>> the one who took a holistic approach, by first documenting all known
>>> issues, writing down a new design, coming up with a plan to deliver the
>>> changes in phases and executing on it. At this point, Onur has completed
>>> the two most important phases: making the controller single threaded and
>>> changing the controller to use the async ZK api. The former fixed
>> multiple
>>> deadlocks and race conditions. The latter significantly improved the
>>> performance when there are many partitions. Experimental results show
>> that
>>> Onur's work reduced the controlled shutdown time by a factor of 100
>> times
>>> and the controller failover time by a factor of 3 times.
>>>
>>> Congratulations, Onur!
>>>
>>> Thanks,
>>>
>>> Jun (on behalf of the Apache Kafka PMC)
>>>
>>
>>
>>
>>
>>
>

Re: [ANNOUNCE] New committer: Onur Karaman

[Matthias J. Sax]

Congrats!!!


On 11/6/17 7:56 PM, Vahid S Hashemian wrote:
> Congrats Onur!
> 
> --Vahid
> 
> 
> 
> From:   Ismael Juma <ism...@juma.me.uk>
> To: dev@kafka.apache.org
> Cc: "us...@kafka.apache.org" <us...@kafka.apache.org>
> Date:   11/06/2017 10:13 AM
> Subject:Re: [ANNOUNCE] New committer: Onur Karaman
> Sent by:isma...@gmail.com
> 
> 
> 
> Congratulations Onur!
> 
> Ismael
> 
> On Mon, Nov 6, 2017 at 5:24 PM, Jun Rao <j...@confluent.io> wrote:
> 
>> Hi, everyone,
>>
>> The PMC of Apache Kafka is pleased to announce a new Kafka committer 
> Onur
>> Karaman.
>>
>> Onur's most significant work is the improvement of Kafka controller, 
> which
>> is the brain of a Kafka cluster. Over time, we have accumulated quite a 
> few
>> correctness and performance issues in the controller. There have been
>> attempts to fix controller issues in isolation, which would make the 
> code
>> base more complicated without a clear path of solving all problems. Onur 
> is
>> the one who took a holistic approach, by first documenting all known
>> issues, writing down a new design, coming up with a plan to deliver the
>> changes in phases and executing on it. At this point, Onur has completed
>> the two most important phases: making the controller single threaded and
>> changing the controller to use the async ZK api. The former fixed 
> multiple
>> deadlocks and race conditions. The latter significantly improved the
>> performance when there are many partitions. Experimental results show 
> that
>> Onur's work reduced the controlled shutdown time by a factor of 100 
> times
>> and the controller failover time by a factor of 3 times.
>>
>> Congratulations, Onur!
>>
>> Thanks,
>>
>> Jun (on behalf of the Apache Kafka PMC)
>>
> 
> 
> 
> 
> 



signature.asc
Description: OpenPGP digital signature

Re: [ANNOUNCE] New committer: Onur Karaman

[Vahid S Hashemian]

Congrats Onur!

--Vahid



From:   Ismael Juma <ism...@juma.me.uk>
To: dev@kafka.apache.org
Cc: "us...@kafka.apache.org" <us...@kafka.apache.org>
Date:   11/06/2017 10:13 AM
Subject:        Re: [ANNOUNCE] New committer: Onur Karaman
Sent by:isma...@gmail.com



Congratulations Onur!

Ismael

On Mon, Nov 6, 2017 at 5:24 PM, Jun Rao <j...@confluent.io> wrote:

> Hi, everyone,
>
> The PMC of Apache Kafka is pleased to announce a new Kafka committer 
Onur
> Karaman.
>
> Onur's most significant work is the improvement of Kafka controller, 
which
> is the brain of a Kafka cluster. Over time, we have accumulated quite a 
few
> correctness and performance issues in the controller. There have been
> attempts to fix controller issues in isolation, which would make the 
code
> base more complicated without a clear path of solving all problems. Onur 
is
> the one who took a holistic approach, by first documenting all known
> issues, writing down a new design, coming up with a plan to deliver the
> changes in phases and executing on it. At this point, Onur has completed
> the two most important phases: making the controller single threaded and
> changing the controller to use the async ZK api. The former fixed 
multiple
> deadlocks and race conditions. The latter significantly improved the
> performance when there are many partitions. Experimental results show 
that
> Onur's work reduced the controlled shutdown time by a factor of 100 
times
> and the controller failover time by a factor of 3 times.
>
> Congratulations, Onur!
>
> Thanks,
>
> Jun (on behalf of the Apache Kafka PMC)
>

Re: [ANNOUNCE] New committer: Onur Karaman

[Ismael Juma]

Congratulations Onur!

Ismael

On Mon, Nov 6, 2017 at 5:24 PM, Jun Rao  wrote:

> Hi, everyone,
>
> The PMC of Apache Kafka is pleased to announce a new Kafka committer Onur
> Karaman.
>
> Onur's most significant work is the improvement of Kafka controller, which
> is the brain of a Kafka cluster. Over time, we have accumulated quite a few
> correctness and performance issues in the controller. There have been
> attempts to fix controller issues in isolation, which would make the code
> base more complicated without a clear path of solving all problems. Onur is
> the one who took a holistic approach, by first documenting all known
> issues, writing down a new design, coming up with a plan to deliver the
> changes in phases and executing on it. At this point, Onur has completed
> the two most important phases: making the controller single threaded and
> changing the controller to use the async ZK api. The former fixed multiple
> deadlocks and race conditions. The latter significantly improved the
> performance when there are many partitions. Experimental results show that
> Onur's work reduced the controlled shutdown time by a factor of 100 times
> and the controller failover time by a factor of 3 times.
>
> Congratulations, Onur!
>
> Thanks,
>
> Jun (on behalf of the Apache Kafka PMC)
>

Re: [ANNOUNCE] New committer: Onur Karaman

[Guozhang Wang]

I'd want to add that Onur has also been contributing a lot to the new
consumer development in the past, making it happen in the 0.9 release.

Very well deserved. Congrats, Onur!


Guozhang

On Mon, Nov 6, 2017 at 9:28 AM, Ted Yu  wrote:

> Congratulations, Onur!
>
> On Mon, Nov 6, 2017 at 9:24 AM, Jun Rao  wrote:
>
> > Hi, everyone,
> >
> > The PMC of Apache Kafka is pleased to announce a new Kafka committer Onur
> > Karaman.
> >
> > Onur's most significant work is the improvement of Kafka controller,
> which
> > is the brain of a Kafka cluster. Over time, we have accumulated quite a
> few
> > correctness and performance issues in the controller. There have been
> > attempts to fix controller issues in isolation, which would make the code
> > base more complicated without a clear path of solving all problems. Onur
> is
> > the one who took a holistic approach, by first documenting all known
> > issues, writing down a new design, coming up with a plan to deliver the
> > changes in phases and executing on it. At this point, Onur has completed
> > the two most important phases: making the controller single threaded and
> > changing the controller to use the async ZK api. The former fixed
> multiple
> > deadlocks and race conditions. The latter significantly improved the
> > performance when there are many partitions. Experimental results show
> that
> > Onur's work reduced the controlled shutdown time by a factor of 100 times
> > and the controller failover time by a factor of 3 times.
> >
> > Congratulations, Onur!
> >
> > Thanks,
> >
> > Jun (on behalf of the Apache Kafka PMC)
> >
>



-- 
-- Guozhang

Re: [ANNOUNCE] New committer: Onur Karaman

[Ted Yu]

Congratulations, Onur!

On Mon, Nov 6, 2017 at 9:24 AM, Jun Rao  wrote:

> Hi, everyone,
>
> The PMC of Apache Kafka is pleased to announce a new Kafka committer Onur
> Karaman.
>
> Onur's most significant work is the improvement of Kafka controller, which
> is the brain of a Kafka cluster. Over time, we have accumulated quite a few
> correctness and performance issues in the controller. There have been
> attempts to fix controller issues in isolation, which would make the code
> base more complicated without a clear path of solving all problems. Onur is
> the one who took a holistic approach, by first documenting all known
> issues, writing down a new design, coming up with a plan to deliver the
> changes in phases and executing on it. At this point, Onur has completed
> the two most important phases: making the controller single threaded and
> changing the controller to use the async ZK api. The former fixed multiple
> deadlocks and race conditions. The latter significantly improved the
> performance when there are many partitions. Experimental results show that
> Onur's work reduced the controlled shutdown time by a factor of 100 times
> and the controller failover time by a factor of 3 times.
>
> Congratulations, Onur!
>
> Thanks,
>
> Jun (on behalf of the Apache Kafka PMC)
>

Re: [ANNOUNCE] New committer: Onur Karaman

[Abhishek Mendhekar]

Congrats Onur!

On Mon, Nov 6, 2017 at 9:24 AM, Jun Rao  wrote:

> Hi, everyone,
>
> The PMC of Apache Kafka is pleased to announce a new Kafka committer Onur
> Karaman.
>
> Onur's most significant work is the improvement of Kafka controller, which
> is the brain of a Kafka cluster. Over time, we have accumulated quite a few
> correctness and performance issues in the controller. There have been
> attempts to fix controller issues in isolation, which would make the code
> base more complicated without a clear path of solving all problems. Onur is
> the one who took a holistic approach, by first documenting all known
> issues, writing down a new design, coming up with a plan to deliver the
> changes in phases and executing on it. At this point, Onur has completed
> the two most important phases: making the controller single threaded and
> changing the controller to use the async ZK api. The former fixed multiple
> deadlocks and race conditions. The latter significantly improved the
> performance when there are many partitions. Experimental results show that
> Onur's work reduced the controlled shutdown time by a factor of 100 times
> and the controller failover time by a factor of 3 times.
>
> Congratulations, Onur!
>
> Thanks,
>
> Jun (on behalf of the Apache Kafka PMC)
>



-- 
Abhishek Mendhekar
abhishek.mendhe...@gmail.com | 818.263.7030

[ANNOUNCE] New committer: Onur Karaman

[Jun Rao]

Hi, everyone,

The PMC of Apache Kafka is pleased to announce a new Kafka committer Onur
Karaman.

Onur's most significant work is the improvement of Kafka controller, which
is the brain of a Kafka cluster. Over time, we have accumulated quite a few
correctness and performance issues in the controller. There have been
attempts to fix controller issues in isolation, which would make the code
base more complicated without a clear path of solving all problems. Onur is
the one who took a holistic approach, by first documenting all known
issues, writing down a new design, coming up with a plan to deliver the
changes in phases and executing on it. At this point, Onur has completed
the two most important phases: making the controller single threaded and
changing the controller to use the async ZK api. The former fixed multiple
deadlocks and race conditions. The latter significantly improved the
performance when there are many partitions. Experimental results show that
Onur's work reduced the controlled shutdown time by a factor of 100 times
and the controller failover time by a factor of 3 times.

Congratulations, Onur!

Thanks,

Jun (on behalf of the Apache Kafka PMC)