Re: Contributing to code

[Jeff Jirsa]

At http://cassandra.apache.org/doc/latest/development/patches.html#patches
There's a link to "low hanging fruit" tickets

Look for one that seems contained and give it a shot. If you get stuck, send a 
link back here and ask for help.



-- 
Jeff Jirsa


> On Jun 19, 2017, at 5:48 PM, Salih Gedik  wrote:
> 
> Hi everyone,
> 
> I am a rising senior and been considering to contribute to the project for a 
> year but could not find an appropriate entry point. I have lots of time to 
> work on this project this year and would not want to miss the chance. Could 
> you committers please suggest me some branch to work on?
> Thank you so much!
> 
> 
> Salih Gedik
> 
> -
> To unsubscribe, e-mail: dev-unsubscr...@cassandra.apache.org
> For additional commands, e-mail: dev-h...@cassandra.apache.org
> 

Re: [VOTE] Release Apache Cassandra 3.11.0

[Brandon Williams]

+1

On Mon, Jun 19, 2017 at 6:10 PM, Michael Shuler 
wrote:

> I propose the following artifacts for release as 3.11.0.
>
> sha1: 88dee7e9d515ad94ecf8f2309f1e6138ec79e1a2
> Git:
> http://git-wip-us.apache.org/repos/asf?p=cassandra.git;a=
> shortlog;h=refs/tags/3.11.0-tentative
> Artifacts:
> https://repository.apache.org/content/repositories/
> orgapachecassandra-1145/org/apache/cassandra/apache-cassandra/3.11.0/
> Staging repository:
> https://repository.apache.org/content/repositories/
> orgapachecassandra-1145/
>
> The Debian and RPM packages are available here:
> http://people.apache.org/~mshuler
>
> The vote will be open for 72 hours (longer if needed).
>
> [1]: (CHANGES.txt) https://goo.gl/x6SzsQ
> [2]: (NEWS.txt) https://goo.gl/qxG8MQ
>
> -
> To unsubscribe, e-mail: dev-unsubscr...@cassandra.apache.org
> For additional commands, e-mail: dev-h...@cassandra.apache.org
>
>

Re: Contributing to code

[Jeff Jirsa]

Also http://cassandra.apache.org/doc/latest/development/patches.html#patches

-- 
Jeff Jirsa


> On Jun 19, 2017, at 6:03 PM, Ben Slater  wrote:
> 
> Hi Salih
> 
> If you haven’t already see it, there is a section in the doco about getting
> started with contributing here:
> http://cassandra.apache.org/doc/latest/development/gettingstarted.html
> 
> Cheers
> Ben
> 
>> On Tue, 20 Jun 2017 at 10:48 Salih Gedik  wrote:
>> 
>> Hi everyone,
>> 
>> I am a rising senior and been considering to contribute to the project
>> for a year but could not find an appropriate entry point. I have lots of
>> time to work on this project this year and would not want to miss the
>> chance. Could you committers please suggest me some branch to work on?
>> Thank you so much!
>> 
>> 
>> Salih Gedik
>> 
>> -
>> To unsubscribe, e-mail: dev-unsubscr...@cassandra.apache.org
>> For additional commands, e-mail: dev-h...@cassandra.apache.org
>> 
>> --
> 
> 
> *Ben Slater*
> 
> *Chief Product Officer *
> 
>    
> 
> 
> Read our latest technical blog posts here
> .
> 
> This email has been sent on behalf of Instaclustr Pty. Limited (Australia)
> and Instaclustr Inc (USA).
> 
> This email and any attachments may contain confidential and legally
> privileged information.  If you are not the intended recipient, do not copy
> or disclose its content, but please reply to this email immediately and
> highlight the error to the sender and then immediately delete the message.

Re: Contributing to code

[Ben Slater]

Hi Salih

If you haven’t already see it, there is a section in the doco about getting
started with contributing here:
http://cassandra.apache.org/doc/latest/development/gettingstarted.html

Cheers
Ben

On Tue, 20 Jun 2017 at 10:48 Salih Gedik  wrote:

> Hi everyone,
>
> I am a rising senior and been considering to contribute to the project
> for a year but could not find an appropriate entry point. I have lots of
> time to work on this project this year and would not want to miss the
> chance. Could you committers please suggest me some branch to work on?
> Thank you so much!
>
>
> Salih Gedik
>
> -
> To unsubscribe, e-mail: dev-unsubscr...@cassandra.apache.org
> For additional commands, e-mail: dev-h...@cassandra.apache.org
>
> --


*Ben Slater*

*Chief Product Officer *

   


Read our latest technical blog posts here
.

This email has been sent on behalf of Instaclustr Pty. Limited (Australia)
and Instaclustr Inc (USA).

This email and any attachments may contain confidential and legally
privileged information.  If you are not the intended recipient, do not copy
or disclose its content, but please reply to this email immediately and
highlight the error to the sender and then immediately delete the message.

Re: Contributing to code

[@Nandan@]

Hi Salih,

If your query is related to some data modeling project in Cassandra in
which you want to work from scratch, then I have one requirement on which I
am going to start. If you like to join then it will be great to develop
from scratch and complete it.

Thanks.

On Tue, Jun 20, 2017 at 8:48 AM, Salih Gedik  wrote:

> Hi everyone,
>
> I am a rising senior and been considering to contribute to the project for
> a year but could not find an appropriate entry point. I have lots of time
> to work on this project this year and would not want to miss the chance.
> Could you committers please suggest me some branch to work on?
> Thank you so much!
>
>
> Salih Gedik
>
> -
> To unsubscribe, e-mail: dev-unsubscr...@cassandra.apache.org
> For additional commands, e-mail: dev-h...@cassandra.apache.org
>
>

Contributing to code

[Salih Gedik]

Hi everyone,

I am a rising senior and been considering to contribute to the project 
for a year but could not find an appropriate entry point. I have lots of 
time to work on this project this year and would not want to miss the 
chance. Could you committers please suggest me some branch to work on?

Thank you so much!


Salih Gedik

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Re: [VOTE] Release Apache Cassandra 3.11.0

[Nate McCall]

+1

On Tue, Jun 20, 2017 at 11:10 AM, Michael Shuler  wrote:
> I propose the following artifacts for release as 3.11.0.
>
> sha1: 88dee7e9d515ad94ecf8f2309f1e6138ec79e1a2
> Git:
> http://git-wip-us.apache.org/repos/asf?p=cassandra.git;a=shortlog;h=refs/tags/3.11.0-tentative
> Artifacts:
> https://repository.apache.org/content/repositories/orgapachecassandra-1145/org/apache/cassandra/apache-cassandra/3.11.0/
> Staging repository:
> https://repository.apache.org/content/repositories/orgapachecassandra-1145/
>
> The Debian and RPM packages are available here:
> http://people.apache.org/~mshuler
>
> The vote will be open for 72 hours (longer if needed).
>
> [1]: (CHANGES.txt) https://goo.gl/x6SzsQ
> [2]: (NEWS.txt) https://goo.gl/qxG8MQ
>
> -
> To unsubscribe, e-mail: dev-unsubscr...@cassandra.apache.org
> For additional commands, e-mail: dev-h...@cassandra.apache.org
>

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[VOTE] Release Apache Cassandra 3.11.0

[Michael Shuler]

I propose the following artifacts for release as 3.11.0.

sha1: 88dee7e9d515ad94ecf8f2309f1e6138ec79e1a2
Git:
http://git-wip-us.apache.org/repos/asf?p=cassandra.git;a=shortlog;h=refs/tags/3.11.0-tentative
Artifacts:
https://repository.apache.org/content/repositories/orgapachecassandra-1145/org/apache/cassandra/apache-cassandra/3.11.0/
Staging repository:
https://repository.apache.org/content/repositories/orgapachecassandra-1145/

The Debian and RPM packages are available here:
http://people.apache.org/~mshuler

The vote will be open for 72 hours (longer if needed).

[1]: (CHANGES.txt) https://goo.gl/x6SzsQ
[2]: (NEWS.txt) https://goo.gl/qxG8MQ

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To unsubscribe, e-mail: dev-unsubscr...@cassandra.apache.org
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Re: [VOTE] Release Apache Cassandra 3.0.14

[Nate McCall]

+1

On Tue, Jun 20, 2017 at 8:37 AM, Michael Shuler  wrote:
> I propose the following artifacts for release as 3.0.14.
>
> sha1: f3e38cb638113c2a23855a104d6082da5bc10ddb
> Git:
> http://git-wip-us.apache.org/repos/asf?p=cassandra.git;a=shortlog;h=refs/tags/3.0.14-tentative
> Artifacts:
> https://repository.apache.org/content/repositories/orgapachecassandra-1143/org/apache/cassandra/apache-cassandra/3.0.14/
> Staging repository:
> https://repository.apache.org/content/repositories/orgapachecassandra-1143/
>
> The Debian and RPM packages are available here:
> http://people.apache.org/~mshuler
>
> The vote will be open for 72 hours (longer if needed).
>
> [1]: (CHANGES.txt) https://goo.gl/VdkHQH
> [2]: (NEWS.txt) https://goo.gl/Qkknas
>

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Re: [VOTE] Release Apache Cassandra 3.0.14

[sankalp kohli]

+1

On Mon, Jun 19, 2017 at 2:13 PM, Jason Brown  wrote:

> +1
>
> On Mon, Jun 19, 2017 at 14:12 Brandon Williams  wrote:
>
> > +1
> >
> > On Mon, Jun 19, 2017 at 3:37 PM, Michael Shuler 
> > wrote:
> >
> > > I propose the following artifacts for release as 3.0.14.
> > >
> > > sha1: f3e38cb638113c2a23855a104d6082da5bc10ddb
> > > Git:
> > > http://git-wip-us.apache.org/repos/asf?p=cassandra.git;a=
> > > shortlog;h=refs/tags/3.0.14-tentative
> > > Artifacts:
> > > https://repository.apache.org/content/repositories/
> > > orgapachecassandra-1143/org/apache/cassandra/apache-cassandra/3.0.14/
> > > Staging repository:
> > > https://repository.apache.org/content/repositories/
> > > orgapachecassandra-1143/
> > >
> > > The Debian and RPM packages are available here:
> > > http://people.apache.org/~mshuler
> > >
> > > The vote will be open for 72 hours (longer if needed).
> > >
> > > [1]: (CHANGES.txt) https://goo.gl/VdkHQH
> > > [2]: (NEWS.txt) https://goo.gl/Qkknas
> > >
> > >
> >
>

Re: [VOTE] Release Apache Cassandra 3.0.14

[Jason Brown]

+1

On Mon, Jun 19, 2017 at 14:12 Brandon Williams  wrote:

> +1
>
> On Mon, Jun 19, 2017 at 3:37 PM, Michael Shuler 
> wrote:
>
> > I propose the following artifacts for release as 3.0.14.
> >
> > sha1: f3e38cb638113c2a23855a104d6082da5bc10ddb
> > Git:
> > http://git-wip-us.apache.org/repos/asf?p=cassandra.git;a=
> > shortlog;h=refs/tags/3.0.14-tentative
> > Artifacts:
> > https://repository.apache.org/content/repositories/
> > orgapachecassandra-1143/org/apache/cassandra/apache-cassandra/3.0.14/
> > Staging repository:
> > https://repository.apache.org/content/repositories/
> > orgapachecassandra-1143/
> >
> > The Debian and RPM packages are available here:
> > http://people.apache.org/~mshuler
> >
> > The vote will be open for 72 hours (longer if needed).
> >
> > [1]: (CHANGES.txt) https://goo.gl/VdkHQH
> > [2]: (NEWS.txt) https://goo.gl/Qkknas
> >
> >
>

Re: [VOTE] Release Apache Cassandra 3.0.14

[Brandon Williams]

+1

On Mon, Jun 19, 2017 at 3:37 PM, Michael Shuler 
wrote:

> I propose the following artifacts for release as 3.0.14.
>
> sha1: f3e38cb638113c2a23855a104d6082da5bc10ddb
> Git:
> http://git-wip-us.apache.org/repos/asf?p=cassandra.git;a=
> shortlog;h=refs/tags/3.0.14-tentative
> Artifacts:
> https://repository.apache.org/content/repositories/
> orgapachecassandra-1143/org/apache/cassandra/apache-cassandra/3.0.14/
> Staging repository:
> https://repository.apache.org/content/repositories/
> orgapachecassandra-1143/
>
> The Debian and RPM packages are available here:
> http://people.apache.org/~mshuler
>
> The vote will be open for 72 hours (longer if needed).
>
> [1]: (CHANGES.txt) https://goo.gl/VdkHQH
> [2]: (NEWS.txt) https://goo.gl/Qkknas
>
>

Re: [VOTE] Release Apache Cassandra 3.0.14

[Jeff Jirsa]

+1


On Mon, Jun 19, 2017 at 1:37 PM, Michael Shuler 
wrote:

> I propose the following artifacts for release as 3.0.14.
>
> sha1: f3e38cb638113c2a23855a104d6082da5bc10ddb
> Git:
> http://git-wip-us.apache.org/repos/asf?p=cassandra.git;a=
> shortlog;h=refs/tags/3.0.14-tentative
> Artifacts:
> https://repository.apache.org/content/repositories/
> orgapachecassandra-1143/org/apache/cassandra/apache-cassandra/3.0.14/
> Staging repository:
> https://repository.apache.org/content/repositories/
> orgapachecassandra-1143/
>
> The Debian and RPM packages are available here:
> http://people.apache.org/~mshuler
>
> The vote will be open for 72 hours (longer if needed).
>
> [1]: (CHANGES.txt) https://goo.gl/VdkHQH
> [2]: (NEWS.txt) https://goo.gl/Qkknas
>
>

[VOTE] Release Apache Cassandra 3.0.14

[Michael Shuler]

I propose the following artifacts for release as 3.0.14.

sha1: f3e38cb638113c2a23855a104d6082da5bc10ddb
Git:
http://git-wip-us.apache.org/repos/asf?p=cassandra.git;a=shortlog;h=refs/tags/3.0.14-tentative
Artifacts:
https://repository.apache.org/content/repositories/orgapachecassandra-1143/org/apache/cassandra/apache-cassandra/3.0.14/
Staging repository:
https://repository.apache.org/content/repositories/orgapachecassandra-1143/

The Debian and RPM packages are available here:
http://people.apache.org/~mshuler

The vote will be open for 72 hours (longer if needed).

[1]: (CHANGES.txt) https://goo.gl/VdkHQH
[2]: (NEWS.txt) https://goo.gl/Qkknas



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Re: Understanding an off-heap memory allocation

[Jeff Jirsa]

The 2 largest users of offheap memory are bloom filters (a probabilistic
data structure that lets cassandra skip some sstables on the read path) and
compression metadata chunks (data structure that helps us track / use
offsets in compressed files).

Bloom filters you can tune by changing the false positive ratio - higher
tolerated false positive %, the less RAM required
Offheap compression metadata you can tune by having fewer chunks (== larger
chunks == if we have to go to disk, we'll have to read+decompress more
data).




On Mon, Jun 19, 2017 at 12:28 AM, Павел Сапежко 
wrote:

> Hi! We use cassandra inside kubernetes cluster. Now I try to find out how
> cassandra uses off-heap memory. Currently we have 10 GB heap, and 21GB
> memory limit(k8s limit) per cassandra node. So in attach you can find our
> cassandra.yaml, k8s statefulset, jvm.options and results of execution some
> tools like jcmd, output of /proc//stats, jolokia responses and start
> logs of cassandra node.
>
> So now I have several questions.
>
>1. What does it mean "internal" memory in native_memory output?
>2. Why in detailed jcmd native_memory ouput I see the next lines? For
>what cassandra uses so much off-heap memory(allocated as one big chunk)?
> [0x7f925a29fff3] Unsafe_AllocateMemory+0xc3
> [0x7f924a3b4368]
> (malloc=1790102KB #628)
>3. Why some java thread(as you can see in native memory output) use
>1028KB stack, although I used -Xss256K JVM option?
>4. Why after disabling mmap(disk_access_mode property in
>cassandra.yaml) cassandra still use mmap as can be see in properly jolokia
>response in attach?
>5. For what cassandra uses direct ByteBuffer pools and can I somehow
>controlled it(set some limits)?
>
> Some environment details.
> As I sad above, we use cassandra inside k8s cluster. As storage we use rbd
> from ceph pool based on ssd disks. We run cassandra on Oracle JVM version
> 8_131 inside docker, of cause. Cassandra version - latest LTS 3.0.13
> P.S. There is no answer in user channel
> --
>
> С уважением,
>
> Павел Сапежко
>
> skype: p.sapezhko
>
>
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