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Re: ARC patent

From: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
To: Zeugswetter Andreas DAZ SD <ZeugswetterA(at)spardat(dot)at>
Cc: Jan Wieck <JanWieck(at)Yahoo(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>,Neil Conway <neilc(at)samurai(dot)com>,pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: ARC patent
Date: 2005-01-17 21:01:11
Message-ID: 200501172101.j0HL1Bq11757@candle.pha.pa.us (view raw or flat)
Thread:
Lists: pgsql-hackers
Zeugswetter Andreas DAZ SD wrote:
> 
> > >> FYI, IBM has applied for a patent on ARC (AFAICS the patent application
> > >> is still pending, although the USPTO site is a little hard to grok):
> > > 
> > >> 
> > http://appft1.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PG01&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.html&r=1&f=G&l=50&s1=%2220040098541%22.PGNR.&OS=DN/20040098541&RS=DN/20040098541
> > > 
> > > Ugh.  We could hope that the patent wouldn't be granted, but I think
> > > it unlikely, unless Jan is aware of prior art (like a publication
> > > predating the filing date).  I fear we'll have to change or remove
> > > that code.
> > > 
> > > 			regards, tom lane
> > 
> > Unfortunately no. The document that inspired me to adapt ARC for 
> > PostgreSQL is from the USENIX File & Storage Technologies Conference 
> > (FAST), March 31, 2003, San Francisco, CA.
> > 
> > I am seriously concerned about this and think we should not knowingly 
> > release code that is possibly infringing a patent.
> 
> I thought IBM granted the right to use these methods in OSS software.
> PostgreSQL is OSS software, thus only such entities relicensing pg
> need to worry about the patent. 

ARC wasn't in the 500 patents released to open source.  Also, I don't
think the offer extends to companys like Pervasive and Command Prompt
that ship commercial versions of PostgreSQL.

> Also the algo is probably sufficiently altered already to not be subject 
> to the patent, no ?

I hope so.

-- 
  Bruce Momjian                        |  http://candle.pha.pa.us
  pgman(at)candle(dot)pha(dot)pa(dot)us               |  (610) 359-1001
  +  If your life is a hard drive,     |  13 Roberts Road
  +  Christ can be your backup.        |  Newtown Square, Pennsylvania 19073

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  • Re: ARC patent at 2005-01-17 20:56:00 from Zeugswetter Andreas DAZ SD

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