Re: ROOT 5.27/06{a,b} patch releases

From: Carminati Federico <Federico.Carminati_at_cern.ch>
Date: Mon, 29 Nov 2010 14:20:24 +0100


Hello,
  we would be happy to "share" the 27.06 branch with CMS. If there are bugs that CMS finds out, they are welcome to be corrected on this branch. We will not request any back-porting of new functionality, but just bug fixes. Best,

Federico Carminati
CERN-PH
1211 Geneva 23
Switzerland
Tel: +41 22 76 74959
Fax: +41 22 76 68505
Mobile: +41 76 487 4843

On 29 Nov 2010, at 12:37, Fons Rademakers wrote:

> Hi Pete,
> 
>  we applied only patches to 5.27.06 that were deemed important by ALICE. However, they are not ALICE specific and they are also all part of the trunk. So you're fine to use 06b.
> 
> Maintaining patches on releases is a lot of work (as it also involves testing and debugging when people report issues, so the more patch releases we have to maintain the bigger the effort gets). In addition dev releases by definition are less polished, as they are a dev snapshot, so you staying on a dev release might involve potentially applying more patches than on a pro release. Maintaining yourself a patches diff for 5.27/06b/c is fine, but in that case you also have to make an extra effort to handle as many issues with that release yourself, as for us to be able to help you would require to build your specific version of 5.27/06 for each issue.
> 
> Anyway, I hope we can welcome you back on 5.28.00 soon in 2011. ;-)
> 
> Cheers, Fons.
> 
> 
> On 29/11/2010 11:22, Peter Elmer wrote:

>>
>> Hi Fons,
>>
>> On Mon, Nov 29, 2010 at 10:53:33AM +0100, Fons Rademakers wrote:
>>>  everything is here (under the "Download" menu on the home page):
>>> 
>>> http://root.cern.ch/drupal/content/root-version-v5-27-06-patch-release-notes
>>> 
>>> These patches on top of this dev release have been made only for the
>>> ALICE HI run with the full understanding that ALICE will move asap
>>> to 5.28 after the HI run.
>>> 
>>> I really do hope you can make the move to 5.28 as soon as it comes
>>> out so we can forget about this dev release.

>>
>> Given the time constraints I think we (CMS) are stuck and will wind up
>> starting our (Xmas) 8TeV MC production and initial LHC 2011 datataking with
>> 5.27/06 (+ patches). We will begin validating 5.28/00 when it comes out,
>> but for the moment we can just say that we will try to figure out when to
>> move back on mass shell (i.e. to 5.28/00) sometime after that. As I discussed
>> with Rene a couple of weeks ago, we don't expect the ROOT team to main
>> explicit patch releases for 5.27/00.
>>
>> Given that we will initially be using 5.27/06, is there a reason _not_
>> to move to 5.27/06b? i.e. is there something among the patches there that
>> was considered Alice-HI-specific and/or undesirable for general use? Or
>> just the general principle that you would like people to move to 5.28/00
>> when it comes out (and not maintain 5.27/06 patch releases)?
>>
>> Pete
>>
>> -------------------------------------------------------------------------
>> Peter Elmer E-mail: Peter.Elmer_at_cern.ch Phone: +41 (22) 767-4644
>> Address: CERN Division PPE, Bat. 32 2C-14, CH-1211 Geneva 23, Switzerland
>> -------------------------------------------------------------------------
>>
> 
> -- 
> Org:    CERN, European Laboratory for Particle Physics.
> Mail:   1211 Geneve 23, Switzerland
> E-Mail: Fons.Rademakers_at_cern.ch              Phone: +41 22 7679248
> WWW:    http://fons.rademakers.org           Fax:   +41 22 7669640
> 
Received on Mon Nov 29 2010 - 14:20:28 CET

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