Re: Recommendation: running Cassandra in containers

[daemeon reiydelle]

The use of Mesos in production for cassandra was a failure due to the
inability to reserve network bandwidth as Mesos can only allocate cpu and
memory profiles to a task. So, assuming you are either running on
dedicated/manually controlled VM's, or are no running a product/meaningful
data storage footprint, your questions are relevant. Otherwise Mesos is not
a viable solution. Note this same issue hit me at several clients with
jenkens CI workloads as well. Look at K8S for these contra-Mesos scenarios.


<==>
"When I finish a project for a client, I have ... learned their issues with
life, their personal secrets, I have come to care about them.
Once the project is over, I lose them as if I lost family. For the client,
however, they’ve just dismissed a service worker." ...
"Thought on the Gig Economy" by Francine Brevetti

*Daemeon C.M. Reiydelle*

*email: daeme...@gmail.com *
*San Francisco 1.415.501.0198/London 44 020 8144 9872/Skype
daemeon.c.m.reiydelle*


On Mon, Jun 25, 2018 at 8:12 AM, Pierre Mavro  wrote:

> Hi,
>
> Regarding the limits in linux cgroups (as used in Kubernetes/Mesos), I
> was wondering if there are any recommendation (didn't find anything on
> this topic).
>
> In general on Java 8 running instances, it is advised to run those
> options to take into account cgroup environment:
>
> -XX:+UnlockExperimentalVMOptions -XX:+UseCGroupMemoryLimitForHeap
>
> Other tuning options for this exists (ex: MaxRAMFraction), I was
> wondering if there is any information somewhere about it.
>
> Thanks in advance
>
> Pierre
>
>
> -
> To unsubscribe, e-mail: dev-unsubscr...@cassandra.apache.org
> For additional commands, e-mail: dev-h...@cassandra.apache.org
>
>

Re: NVIDIA TESLA: The World's Most Advance Data Center GPU's for accelerating demanding HPC workloads

[daemeon reiydelle]

Not so sure they are C* relevant, I build (100's of GPU enabled node) HPC's
that use them for ML, AI, Graph analytics, etc. with the sources in C* or
more typically Hadoop/EMR data.


<==>
"Who do you think made the first stone spear? The Asperger guy.
If you get rid of the autism genetics, there would be no Silicon Valley"
Temple Grandin


*Daemeon C.M. ReiydelleSan Francisco 1.415.501.0198London 44 020 8144 9872*


On Thu, Mar 15, 2018 at 8:40 AM, Kenneth Brotman <
kenbrot...@yahoo.com.invalid> wrote:

> I see things like this
> https://www.nvidia.com/en-us/data-center/tesla/#section3 as something I
> might be using in things I help build.  Does anyone have any experience
> with
> them?
>
>
>
> Kenneth Brotman
>
>

Re: Spam Moderation

[daemeon reiydelle]

In spite of what was intended to be an out of channel email (thank you
gmail for deciding to change the email address, grr ;{)

I both recognize that these resources exist, think that they are not
appropriate for this channel, but think they ARE appropriate "in some other
channel". Given the number of recruiters who contact me based on my (more
intelligent at times) postings to this list, there IS a wider audience
listening to this than we think. Therefore I thought it interesting and
insightful to hear the responses.

I agree it is off topic, but IMO do not consider it spam.


*...*



*Daemeon C.M. ReiydelleUSA (+1) 415.501.0198London (+44) (0) 20 8144 9872*

On Thu, Mar 23, 2017 at 11:51 AM, Eric Evans 
wrote:

> On Thu, Mar 23, 2017 at 11:10 AM, Michael Shuler 
> wrote:
> > I won't reply to the obvious spam to hilight it any further, so new
> > message..
> >
> > Could the mailing list moderator that approved the "client list" message
> > identify themselves and possibly explain how that was seen as a valid
> > message about the development of Apache Cassandra?
>
> TL;DR That would be me.
>
> My policy in moderating this list has always been to ignore the
> obvious spam, and default to letting everything else through.  IMO, to
> apply judgment beyond that is a very slippery slope.  Transparency and
> openness are more important to me than protecting everyone from the
> occasional false-positive spam and/or possibly off-topic message.
>
> I also bang through the messages in the queue pretty quickly and make
> the Obvious Spam -or- not judgement almost reflexively.  In this case,
> I guess the lack of HTML, images, or attachments, along with the
> presence of words like "Datastax", and "client" triggered a snap Not
> Spam reaction and I sent it through.
>
> But at least some of the reaction here seems to extend beyond a simple
> matter of a spam message on the list (that has happened before); Some
> here seem to be reacting out of concern to the very existence of the
> email, which makes me think it's precisely the sort of thing that
> shouldn't be kept hidden.
>
>
> --
> Eric Evans
> john.eric.ev...@gmail.com
>

Re: DataStax Client List

[daemeon reiydelle]

Hi Theresa,

While some may be fussing at this, I am not concerned.

I AM interested in something of the sort, which would be a list of contacts
who are CTO, CIO, etc. using big data. Just Hadoop (Datastax) is fine, or
those using other big data providers would be of interest.

What are you looking to charge?

FYI, my goal is to get connected with the resources that provide CIO/CTO
level headhunting to these CIO/CTO's. Thoughts?


*...*



*Daemeon C.M. ReiydelleUSA (+1) 415.501.0198London (+44) (0) 20 8144 9872*

On Thu, Mar 23, 2017 at 9:52 AM, Edward Capriolo 
wrote:

> Well that is quite unsettling.
>
> On Thu, Mar 23, 2017 at 10:33 AM, Theresa Taylor <
> theresa.tay...@onlinedatatech.biz> wrote:
>
> > Hi,
> >
> > Would you be interested in acquiring a list of DataStax users'
> information
> > in an Excel sheet for unlimited marketing usage?
> >
> > List includes – First and Last name, Phone number, Email Address, Company
> > Name, Job Title, Address, City, State, Zip, SIC code/Industry, Revenue
> and
> > Company Size. The leads can also be further customized as per
> requirements.
> >
> > We can provide contact lists from any country/industry/title.
> >
> > If your target criteria are different kindly get back to us with your
> > requirement with geography and job titles to provide you with counts and
> > more information.
> >
> > Let me know your thoughts!
> >
> > Thanks,
> >
> >
> > Theresa
> > Senior Information Analyst
> >
> >
> > If you wish not to receive marketing emails, please reply back
> “Opt
> > Out” In headlines
> >
>

Re: Problems with cassandra on AWS

[daemeon reiydelle]

xWell, I seem to recall that the private IP's are valid for communications
WITHIN one VPC. I assume you can log into one machine and ping (or ssh) the
others. If so, check that cassandra.yaml is not set to listen on 127.0.0.1
(localhost).


*...*



*Daemeon C.M. ReiydelleUSA (+1) 415.501.0198
<%28%2B1%29%20415.501.0198>London (+44) (0) 20 8144 9872
<%28%2B44%29%20%280%29%2020%208144%209872>*

On Sun, Jul 10, 2016 at 4:54 PM, Kant Kodali  wrote:

> Hi Guys,
>
> I installed a 3 node Cassandra cluster on AWS and my replication factor is
> 3. I am trying to insert some data into a table. I set the consistency
> level of QUORUM at a Cassandra Session level. It only inserts into one node
> and unable to talk to other nodes because it is trying to contact other
> nodes through private IP and obviously that is failing so I am not sure how
> to change settings in say cassandra.yaml or somewhere such that rpc_address
> in system.peers table is updated to public IP's? I tried changing the seeds
> to all public IP's that didn't work as it looks like ec2 instances cannot
> talk to each other using public IP's. any help would be appreciated!
>
> Thanks,
> kant
>

Re: Guidance

[daemeon reiydelle]

What is the link to that user group? While I do C* DevOps, I do a lot of
work with users so would like to lurk on that channel. Seems like even
after all these years I learn something new!

Thanks D

On Tue, Jul 5, 2016 at 7:27 AM, Eric Stevens  wrote:

> Hi Melinda, these questions are probably better suited for the users group
> rather than the dev group (which concerns itself with database internals
> and feature development).  I'd recommend reposting over there.
>
> On Mon, Jul 4, 2016 at 6:16 AM Melinda Zoe 
> wrote:
>
> > Hello Group,
> >
> > I’ve been following the group for a while and I’m ready to take a stab at
> > Cassandra. I have two questions as I plan everything out:
> >
> > 1.If I create the database on Mac OS, what is the process for
> > migrating it to another environment like Windows? This concerns me
> because
> > I’m not sure who will host me later. Is it as simple as copying and
> pasting
> > the database and moving all of the files over or will the database need
> to
> > be converted?
> > 2.I want to use Cassandra for a website that will rely heavily on
> > content that I provide the user. I plan on uploading content daily. Have
> > any of you created a template for uploading records into Cassandra or
> have
> > any of you created a script for loading multiple records at a time?
> >
> > Melinda
>

Re: Netflix Billing Migration to AWS

[daemeon reiydelle]

Thanks, interesting.


*...*



*Daemeon C.M. ReiydelleUSA (+1) 415.501.0198London (+44) (0) 20 8144 9872*

On Tue, Jun 21, 2016 at 9:24 PM, Mahdi Mohammadi  wrote:

> Worth reading. It has references to Cassandra and how/where they use it.
>
> http://techblog.netflix.com/2016/06/netflix-billing-migration-to-aws.html
>
>
> Best Regards
>