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This profile was last updated on 7/10/14  and contains information from public web pages and contributions from the ZoomInfo community.

Chief Technology Officer

Local Address: Redwood Shores, California, United States
Blekko
130 Shoreline Drive Suite 200
Redwood City, California 94065
United States

Company Description: Blekko is a consumer facing web search engine. We have our own crawl, index, ranking model, webserver and NoSQL database. Most of the code and modeling that...   more
Background

Employment History

Education

  • BA , Math and Physics
    Brandeis University
  • MA , Astronomy
    University of Virginia
187 Total References
Web References
Blekko
blekko.com, 10 July 2014 [cached]
Greg Lindahl
CTO Greg Lindahl was Founder and Distinguished Engineer at PathScale, at which he was the architect of the InfiniPath low-latency InfiniBand HCA. Additionally, he worked on commodity Linux clusters at HPTi, including the 1999 Forecast Systems Lab system, which was the first time a Linux cluster won a conventional supercomputing procurement. Prior to this, he worked on the Legion "grid" distributed OS project at the University of Virginia, and for D. E. Shaw & Co., a New York investment bank. Greg holds a MA in Astronomy from the University of Virginia, and a BA in Math and Physics with Highest Honors from Brandeis University.
Paradoxes of Defence, by George Silver (1599)
www.pbm.com, 25 April 2014 [cached]
Greg Lindahl lindahl@pbm.com ]
Mikhail Kuzminsky Zelinsky Institute of ...
www.beowulf.org, 18 Aug 2010 [cached]
Mikhail Kuzminsky Zelinsky Institute of Organic Chemistry Moscow > >Regards, >Rajiv From lindahl at pathscale.com Mon Jan 3 11:12:45 2005 From: lindahl at pathscale.com (Greg Lindahl) Date: Wed Aug 18 01:03:46 2010 Subject: [Beowulf] Re: MPI Implementations for SMP use In-Reply-To: References: Message-ID: On Sun, Dec 19, 2004 at 05:37:20PM -0600, Isaac Dooley wrote: > Not necessarily.
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HP just suggests updating the firmware, which I have > done to no avail. > > Thanks, > > Bill > > _______________________________________________ > Beowulf mailing list, Beowulf@beowulf.org > To change your subscription (digest mode or unsubscribe) visit > http://www.beowulf.org/mailman/listinfo/beowulf From lindahl at pathscale.com Mon Jan 17 13:40:14 2005 From: lindahl at pathscale.com (Greg Lindahl) Date: Wed Aug 18 01:03:48 2010 Subject: [Beowulf] HP 2848 switch woes In-Reply-To: References: Message-ID: On Mon, Jan 17, 2005 at 08:54:16AM -0500, Bill Wichser wrote: > >On a direct cable, the rarp is seen and the compute node receives the > >info via the head node, right after the network card is reset.
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Message-ID: ----- Original Message ----- From: "Greg Lindahl"
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Thanks, joel From lindahl at pathscale.com Wed Jan 19 23:01:21 2005 From: lindahl at pathscale.com (Greg Lindahl) Date: Wed Aug 18 01:03:48 2010 Subject: [Beowulf] 64 bit Xeons?
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Often > taking more than real time to process the Video streams. > > I read a paper a while back about someone doing this using Condor, but > I'm wondering if anyone does this regularly on Beowulf. > > I'd love to learn more about your setup. > > Thanks, > > joel > _______________________________________________ > Beowulf mailing list, Beowulf@beowulf.org > To change your subscription (digest mode or unsubscribe) visit > http://www.beowulf.org/mailman/listinfo/beowulf From lindahl at pathscale.com Thu Jan 20 09:42:51 2005 From: lindahl at pathscale.com (Greg Lindahl) Date: Wed Aug 18 01:03:48 2010 Subject: [Beowulf] Mosix In-Reply-To: References: Message-ID: > >Before message-passing mechanisms arrived, and before the concept of > >multi-threading was introduced, Note that message-passing predates MP.
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Sincerely, Josip From lindahl at pathscale.com Fri Jan 21 14:15:06 2005 From: lindahl at pathscale.com (Greg Lindahl) Date: Wed Aug 18 01:03:49 2010 Subject: [Beowulf] Re: Cooling vs HW replacement In-Reply-To:
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Now in >>my another new facility will be 200TB of nearline storage. if we did it > with 1.4e6 hr, 147GB SCSI disks, I'd expect to go 1022 hrs between failures. > I'd prefer to use 500 GB SATA disks, even if they're 1e6 hrs, since that > will let me go 2500 hours between failures (not to mention saving around > 5KW of power!) And >>I'd > regards, mark hahn. > > -- Robert G. Brown http://www.phy.duke.edu/~rgb/ Duke University Dept. of Physics, Box 90305 Durham, N.C. 27708-0305 Phone: 1-919-660-2567 Fax: 919-660-2525 email:rgb@phy.duke.edu From lindahl at pathscale.com Sun Jan 23 14:35:48 2005 From: lindahl at pathscale.com (Greg Lindahl) Date: Wed Aug 18 01:03:49 2010 Subject: [Beowulf] Re: Cooling vs HW replacement In-Reply-To:
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On Sun, 23 Jan 2005, Greg Lindahl wrote: > On Sun, Jan 23, 2005 at 11:30:30AM -0500, Robert G. Brown wrote: > > > So I reiterate -- MTBF for hard disks, as reported by the manufacturer, > > is a nearly useless number. > > It is useful if you use it for what it's meant to be used for: the > failure rate in the bottom of the bathtub.
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To: "Greg Lindahl"
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Sent: Sunday, January 23, 2005 10:57 PM Subject: Re: [Beowulf] Re: Cooling vs HW replacement > On Sun, 23 Jan 2005, Greg Lindahl wrote: > > I think >>everybody 2x-3x the mfr number, and finds that it varies wildly in time and with > environmental conditions and with plain old luck. That's why (and what > I mean by stating that) mfr MTBF quotations are optimistic and cheery. Such may be the case, but as Greg pointed out, they are a standard measure of reliability of a device.
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In-Reply-To: References: Message-ID: On Thu, 20 Jan 2005 06:01 pm, Greg Lindahl wrote: > ... which is because Intel copied it too closely, not because Intel > tinkered with it. Aha - thanks for the clarification! There doesn't seem to be any definitive place that says what the differences are, I had to google around quite a bit to find those bits. :-( This is why the Beowulf list is so good, there are so many knowledgeable folks here willing to help. Thanks Donald (et. al?) for running it! cheers, Chris -- Christopher Samuel - (03)9925 4751 - VPAC Systems & Network Admin Victorian Partnership for Advanced Computing http://www.vpac.org/ Bldg 91, 110 Victoria Street, Carlton South, VIC 3053, Australia -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: application/pgp-signature Size: 189 bytes Desc: not available Url : http://www.scyld.com/pipermail/beowulf/attachments/20050121/0de5db3d/attachment.bin From sbrenneis at surry.net Thu Jan 20 17:08:14 2005 From: sbrenneis at surry.net (Steve Brenneis) Date: Wed Aug 18 01:03:49 2010 Subject: [Beowulf] Mosix In-Reply-To: References: Message-ID: On Thu, 2005-01-20 at 12:42, Greg Lindahl wrote: > > >Before message-passing mechanisms arrived, and before the concept of > > >multi-threading was introduced, > > Note that message-passing predates MP.
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Message-ID: On Sun, Jan 23, 2005 at 11:14:14PM -0800, Greg Lindahl wrote: > On Mon, Jan 24, 2005 at 01:57:16AM -0500, Robert G. Brown wrote: > > > Otherwise, what I was basically doing is describing the bathtub > > Didn't look like that to me, but I just read your rants, I wasn't the > guy who wrote them. > > > As was pointed out by Karen (and I agree) the mfr warranty period is > > perhaps a better number for most people to pay attention to than MTBF > > I disagree.
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As Greg and others have pointed out, these numbers speak of the rate of failure at the bottom of the bathtub.
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Message-ID: At 12:48 AM 1/27/2005, Karen Shaeffer wrote: >On Sun, Jan 23, 2005 at 11:14:14PM -0800, Greg Lindahl wrote: > > >These numbers are defined by their collective usage in the industry.
GREG LINDAHL
www.hpcc-usa.org, 4 Mar 2011 [cached]
GREG LINDAHL
Greg Lindahl is a Distinguished Engineer at PathScale, a Linux cluster acceleration start-up. His previous employers include High Performance Technologies, Inc., where he was the technical lead for the first Linux cluster to win a conventional supercomputing bid (1999, at the Forecast Systems Lab in Boulder, CO); D. E. Shaw & Co., a Manhattan-based investment bank; and a stint as a Computer Science researcher with the Legion distributed operating system research group at the University of Virginia. Greg holds a M.A. in Astronomy from the University of Virginia, and someday hopes to finish his PhD in general relativistic numerical hydrodynamics.
SVLUG Meeting History
www.svlug.org, 5 Feb 2014 [cached]
Greg Lindahl
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Greg Lindahl is CTO at Blekko. He was previously a founder at PathScale, where he was the architect of the InfiniPath low-latency InfiniBand HCA, used to build tightly-coupled supercomputing clusters. Prior to PathScale's founding in 2001, Greg worked on commodity Linux clusters at HPTi, including the 1999 Forecast Systems Lab system, which was the first time a Linux cluster won a conventional supercomputing procurement. Greg started using Linux in 1996, while working on the Legion "grid" distributed OS project at the University of Virginia, and you can trace the history of his Linux laptop usage from the guides he's written at linux-on-laptops.com and tuxmobil.org.
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