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From Shahryar Sedghi <shsed...@gmail.com>
Subject Re: Why do Datastax docs recommend Java 6?
Date Thu, 04 Apr 2013 16:12:47 GMT
I use IBM JVM 7, it is free,  and for VMs over 8 GB it has a garbage
collection policy that makes it almost pause-less. We also use some
security libraries that eliminates use of other libs that you need for
Oracle.


On Thu, Apr 4, 2013 at 12:59 AM, Edward Capriolo <edlinuxguru@gmail.com>wrote:

> Hey guys. what gives!
> Apparently Cassandra ran on 1.7 like 5 years ago. Was their a regression?
>
> jk
>
> https://github.com/jbellis/helenus
>
> Installation
> ------------
> * Please use jdk 1.7; Cassandra will run with 1.6 but
>   frequently core dumps on quad-core machines
> * Unpack the tar ball:
>
>
>
>
> On Wed, Feb 6, 2013 at 12:56 PM, Wei Zhu <wz1975@yahoo.com> wrote:
>
>> 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
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>>
>>   *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
>>
>>
>>
>>
>>
>


-- 
"Life is what happens while you are making other plans." ~ John Lennon

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