[Beowulf] SuSE 9.3

Lombard, David N david.n.lombard at intel.com
Wed Jul 13 11:37:33 EDT 2005


From: Mikhail Kuzminsky Wednesday, July 13, 2005 8:18 AM
> 
> In message from "Lombard, David N" <david.n.lombard at intel.com> (Wed,
> 13 Jul 2005 07:23:57 -0700):
> >From: Mark Hahn on Tuesday, July 12, 2005 5:27 PM
> >>
> >> > Corporate users and ISVs don't want to see the OS revised more
> >>than
> >once
> >> > a year.
> >>
> >> which is sad, really.  they've been so traumatized by the dominant
> >> platform that they expect that changing anything will break
> >everything.
> >> the very concept of a standard, let alone an interface standard
> >>(ABI)
> >> is foreign to this mentality.
> >
> >Theory v. practice.  Implementation (i.e., compiler and linker
> >output)
> >can substantially impact performance and correctness.
> >
> >As example, the 2.4.6-2.4.18 range of kernels saw a steady rise in
> >short/small I/O performance at the expense of a steady and
> >significant
> >loss of large-I/O performance.
> Sorry, does it incorrect for latest 2.4.x, for example 2.4.21 ?

Sorry, I didn't explicitly state this, but at 2.4.18 (maybe [.17,.19]?)
the large-I/O slowdown was corrected.

> BTW, if you say about ext2fs/ext3fs, and need huge I/O, why not to use
> xfs file system ?

Be assured, XFS *was* used, with very careful tuning to the app.

-- 
dnl

My comments represent my opinions, not those of Intel Corporation.

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