incubator-cassandra-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Peter Lin <wool...@gmail.com>
Subject Re: Why do Datastax docs recommend Java 6?
Date Thu, 07 Feb 2013 11:56:42 GMT
one thing to keep in mind with zing. on the hardware side they recommend
the following.

minimum of 6 cores
minimum of 32GB of RAM

I got an open source license of zing and plan to do some testing this month
comparing jdk6, jdk7 and zing.


On Thu, Feb 7, 2013 at 1:45 AM, Viktor Jevdokimov <
Viktor.Jevdokimov@adform.com> wrote:

>  A year ago they asked $10-12k per server – crazy people. With much lower
> price they could sell much more.****
>
> ** **
>
> There’s no advantage for such overpriced product for Cassandra, with some
> exceptions.****
>
> ** **
>
> With RF>1 it is possible for client to early timeout the request and try
> on another replica.****
>
> ** **
>
> For example, for our load, Young Gen GC pauses are ~150ms every 4-5 sec
> and requirement for reads is <=40ms.****
>
> With RF=4 (average local reads are <1ms), we timeout in 10ms and try form
> other replica.****
>
> Requests are fulfilled by 1 node in 90%, by 2 nodes in 98%, by 3 nodes in
> >99%. SLA keeps at 99.9%, while 98% is acceptable.****
>
> Sure we’d like to increase 10ms timeout on client per 1 node request
> keeping SLA >99%, but it is impossible without Zing or something else.****
>
> ** **
>
> We’d like to try latest JRockit JVM, which claims a better GC performance
> than HotSpot JVM.****
>
> ** **
>
> ** **
>
> ** **
>    Best regards / Pagarbiai
> *Viktor Jevdokimov*
> Senior Developer
>
> Email: Viktor.Jevdokimov@adform.com
> Phone: +370 5 212 3063, Fax +370 5 261 0453
> J. Jasinskio 16C, LT-01112 Vilnius, Lithuania
> Follow us on Twitter: @adforminsider <http://twitter.com/#!/adforminsider>
> Take a ride with Adform's Rich Media Suite<http://vimeo.com/adform/richmedia>
>  [image: Adform News] <http://www.adform.com>
> [image: Adform awarded the Best Employer 2012]
> <http://www.adform.com/site/blog/adform/adform-takes-top-spot-in-best-employer-survey/>
>
> Disclaimer: The information contained in this message and attachments is
> intended solely for the attention and use of the named addressee and may be
> confidential. If you are not the intended recipient, you are reminded that
> the information remains the property of the sender. You must not use,
> disclose, distribute, copy, print or rely on this e-mail. If you have
> received this message in error, please contact the sender immediately and
> irrevocably delete this message and any copies.
>
>   *From:* Wei Zhu [mailto:wz1975@yahoo.com]
> *Sent:* Wednesday, February 06, 2013 19:56
>
> *To:* user@cassandra.apache.org
> *Subject:* Re: Why do Datastax docs recommend Java 6?****
>
>  ** **
>
> Anyone has first hand experience with Zing JVM which is claimed to be
> pauseless? How do they charge, per CPU?****
>
> ** **
>
> Thanks****
>
> -Wei****
>    ------------------------------
>
> *From:* Edward Capriolo <edlinuxguru@gmail.com>
> *To:* user@cassandra.apache.org
> *Sent:* Wednesday, February 6, 2013 7:07 AM
> *Subject:* Re: Why do Datastax docs recommend Java 6?****
>
> ** **
>
> Oracle already did this once, It was called jrockit :)****
>
> http://www.oracle.com/technetwork/middleware/jrockit/overview/index.html**
> **
>
> ** **
>
> Typically oracle acquires they technology and then the bits are merged
> with the standard JVM. ****
>
> ** **
>
> On Wed, Feb 6, 2013 at 2:13 AM, Viktor Jevdokimov <
> Viktor.Jevdokimov@adform.com> wrote:****
>
> I would prefer Oracle to own an Azul’s Zing JVM over any other (GC) to
> provide it for free for anyone :)****
>
>  ****
>
> Best regards / Pagarbiai****
>
> *Viktor Jevdokimov*****
>
> Senior Developer****
>
> ** **
>
> Email: Viktor.Jevdokimov@adform.com****
>
> Phone: +370 5 212 3063, Fax +370 5 261 0453****
>
> J. Jasinskio 16C, LT-01112 Vilnius, Lithuania****
>
> Follow us on Twitter: @adforminsider <http://twitter.com/#!/adforminsider>
> ****
>
> Take a ride with Adform's Rich Media Suite<http://vimeo.com/adform/richmedia>
> ****
>
> [image: Adform News] <http://www.adform.com/>****
>
> [image: Adform awarded the Best Employer 2012]<http://www.adform.com/site/blog/adform/adform-takes-top-spot-in-best-employer-survey/>
> ****
>
>
> Disclaimer: The information contained in this message and attachments is
> intended solely for the attention and use of the named addressee and may be
> confidential. If you are not the intended recipient, you are reminded that
> the information remains the property of the sender. You must not use,
> disclose, distribute, copy, print or rely on this e-mail. If you have
> received this message in error, please contact the sender immediately and
> irrevocably delete this message and any copies. ****
>
> ** **
>
> *From:* jeffpk@gmail.com [mailto:jeffpk@gmail.com]
> *Sent:* Wednesday, February 06, 2013 02:23
> *To:* user@cassandra.apache.org
> *Subject:* Re: Why do Datastax docs recommend Java 6?****
>
>  ****
>
> Oracle now owns the sun hotspot team, which is inarguably the highest
> powered java vm team in the world. Its still really the epicenter of all
> java vm development.****
>
> Sent from my Verizon Wireless BlackBerry****
>   ------------------------------
>
> *From: *"Ilya Grebnov" <ilya@metricshub.com> ****
>
> *Date: *Tue, 5 Feb 2013 14:09:33 -0800****
>
> *To: *<user@cassandra.apache.org>****
>
> *ReplyTo: *user@cassandra.apache.org ****
>
> *Subject: *RE: Why do Datastax docs recommend Java 6?****
>
>  ****
>
> Also, what is particular reason to use Oracle JDK over Open JDK? Sorry, I
> could not find this information online.****
>
>  ****
>
> Thanks, ****
>
> Ilya****
>
> *From:* Michael Kjellman [mailto:mkjellman@barracuda.com<mkjellman@barracuda.com>]
>
> *Sent:* Tuesday, February 05, 2013 7:29 AM
> *To:* user@cassandra.apache.org
> *Subject:* Re: Why do Datastax docs recommend Java 6?****
>
>  ****
>
> There have been tons of threads/convos on this.****
>
>  ****
>
> In the early days of Java 7 it was pretty unstable and there was pretty
> much no convincing reason to use Java 7 over Java 6.****
>
>  ****
>
> Now that Java 7 has stabilized and Java 6 is EOL it's a reasonable
> decision to use Java 7 and we do it in production with no issues to speak
> of.****
>
>  ****
>
> That being said there was one potential situation we've seen as a
> community where bootstrapping new node was using 3x more CPU and getting
> significantly less throughput. However, reproducing this consistently never
> happened AFAIK.****
>
>  ****
>
> I think until more people use Java 7 in production and prove it doesn't
> cause any additional bugs/performance issues Datastax will update their
> docs. Until now I'd say it's a safe bet to use Java 7 with Vanilla C*
> 1.2.1. I hope this helps!****
>
>  ****
>
> Best,****
>
> Michael****
>
>  ****
>
> *From: *Baron Schwartz <baron@xaprb.com>
> *Reply-To: *"user@cassandra.apache.org" <user@cassandra.apache.org>
> *Date: *Tuesday, February 5, 2013 7:21 AM
> *To: *"user@cassandra.apache.org" <user@cassandra.apache.org>
> *Subject: *Why do Datastax docs recommend Java 6?****
>
>  ****
>
> The Datastax docs repeatedly say (e.g.
> http://www.datastax.com/docs/1.2/install/install_jre) that Java 7 is not
> recommended, but they don't say why. It would be helpful to know this. Does
> anyone know? ****
>
>  ****
>
> The same documentation is referenced from the Cassandra wiki, for example,
> http://wiki.apache.org/cassandra/GettingStarted****
>
>  ****
>
> - Baron****
>
> ** **
>
> ** **
>

Mime
View raw message