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Hi Connie,

> Troy Dawson wrote:
>>>> Whatever the latest security kernel is when we get to Release
>>>> Candidate 2.
> 
> OK - do you anticipate that it will be some flavor of 2.6.18, or will it
> be a later version?
> 
>> 2.6.18 from TUV is really 2.6.18 + a whole bunch of back ported patches
>> from 2.6.18+ .  TUV does not change the "base" number during a release,
>> in this case SL 5.  But that does not mean that alot of patches have not
>> been backported.
> 
>> It will have a version of 2.6.18 but in reality it is much , much more.

The main item of concern is that the 'cubic' TCP congestion control
algorithm is broken in the 2.6.18 kernel, and causes reduced network
performance.

In machines that have to run 2.6.18, we have seen much better long-haul
TCP performance using 'htcp' instead of cubic.

Thanks,
		--eli


> 
>> If you run the following command you will get a small idea of what
>> patches are in TUV kernel and thus ours.  You can download the kernel in
>> this alpha and look at those change logs too.  Just add a p to the -q --
>> -qp
>> and a full file name instead of "kernel"
> 
>>     rpm -q --changelog kernel
>>     rpm -qp --changelog kernel-2.6.18-194.el5.i686.rpm
> 
> 
> (the reason I'm asking has to do with the default TCP congestion control
> algorithms supplied with various kernel versions, and the bugs that they
> do or do not have).
> 
>> If you give more detail I will look to see if they have been included. 
>> If there is a TUV bugzilla entered then the bugzilla number would be
>> useful.
> 
>> -Connie Sieh
> 
> 
> Thanks,
> 
>         --eli
> 
> 
>>>>
>>>> Troy
>>>>
>>>> Eli Dart wrote:
>>>> Hi Troy,
>>>>
>>>> What kernel version will ship with SL5.5?
>>>>
>>>> Thanks,
>>>>
>>>>         --eli
>>>>
>>>> Troy Dawson wrote:
>>>>>>> The first alpha release for Scientific Linux 5.4 has been released
>>>>>>> for
>>>>>>> both i386 and x86_64. This release has most of the new updated
>>>>>>> packages
>>>>>>> from The Upstream Vendors Update 5.
>>>>>>>
>>>>>>> It will install, and it appears to work, but no major testing has
>>>>>>> been
>>>>>>> done.
>>>>>>>
>>>>>>> We are working on the DVD's and will let you know when/if they are
>>>>>>> available.
>>>>>>>
>>>>>>> -----------------------------------------------------------------------------
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> DOWNLOAD INFO
>>>>>>> -----------------------------------------------------------------------------
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>   http://ftp1.scientificlinux.org/linux/scientific/5rolling/i386
>>>>>>>   http://ftp1.scientificlinux.org/linux/scientific/5rolling/x86_64
>>>>>>>
>>>>>>> -----------------------------------------------------------------------------
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> CHANGES by Scientific Linux
>>>>>>> -----------------------------------------------------------------------------
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> *    sl-release-5.5-0.1.rolling.i386.rpm
>>>>>>> *    sl-release-notes-5.5-0.1.rolling.noarch.rpm
>>>>>>> *    yum-conf-55-0.1.rolling.SL.noarch.rpm
>>>>>>> *    yum-conf-5x-1-9.SL.noarch.rpm
>>>>>>>
>>>>>>> -----------------------------------------------------------------------------
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> CHANGES by The Upstream Vendor
>>>>>>> -----------------------------------------------------------------------------
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> *freeradius2 - Added
>>>>>>>
>>>>>>> *gsl -- Added
>>>>>>>
>>>>>>> *openoffice.org -- Updated to 3.1.1
>>>>>>>
>>>>>>> *postgresql84 -- Added
>>>>>>> -- postgresql84 cannot be installed alongside postgreql
>>>>>>> -- postgresql databased are fundamentally different than postgreql84
>>>>>>> databases.  Because of that in order to update you have to do a
>>>>>>> dump of
>>>>>>> the postgresql database, and then restore to a postgresql84 database
>>>>>>>
>>>>>>> *samba3x -- Added
>>>>>>>
>>>>>>> *tzdata
>>>>>>> -- Changed from noarch to i386
>>>>>>> -- added tzdata-java
>>>>>>>
>>>>>>> *xz -- Added
>>>>
> 
>>

- --
Eli Dart                                            NOC: (510) 486-7600
ESnet Network Engineering Group                          (800) 333-7638
Lawrence Berkeley National Laboratory
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