Big sorts
If you're interested in more details on the Google petabyte sort, discussed here recently (can't find the original subject line because Notes doesn't have a useful search feature), see: http://scienceblogs.com/goodmath/2008/11/scale_how_large_quantities_of.php Some of your objections to the article are addressed in the comments. I had never previously seen the term Shannon, defined to mean 1 mole of bits (6.02 x 10^23 bits). -- Jack Hamilton Management Information Analysis - Analytic Information Services Kaiser Foundation Health Plan, Inc. 1950 Franklin Street, Oakland, California 94612 +1 510 987-1556 (KP tieline 8-427-1556) NOTE: This email document and attachments are covered by CA Evidence Code §1157 and CA Health and Safety Code §1370. NOTICE TO RECIPIENT: If you are not the intended recipient of this e-mail, you are prohibited from sharing, copying, or otherwise using or disclosing its contents. If you have received this e-mail in error, please notify the sender immediately by reply e-mail and permanently delete this e-mail and any attachments without reading, forwarding or saving them. Thank you. -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: Big sorts
In a message dated 12/1/2008 10:26:13 A.M. Central Standard Time, [EMAIL PROTECTED] writes: I had never previously seen the term Shannon, defined to mean 1 mole of bits (6.02 x 10^23 bits). Since the title of the linked article includes the word Information, I would assume that Shannon refers to the late Claude Elwood Shannon, who did seminal research and published papers on Information Theory. _http://en.wikipedia.org/wiki/Claude_Shannon_ (http://en.wikipedia.org/wiki/Claude_Shannon) Bill Fairchild Rocket Software **Finally, one site has it all: your friends, your email, your favorite sites. Try the NEW AOL.com. (http://www.aol.com/?optin=new-dpicid=aolcom40vanityncid=emlcntaolcom0006) -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: Big sorts
And I was intrigued to learn mole is (now) a SI base unit. When I were a lad I only recall its usage in relation to Chemistry; a mole of atoms or molecules for example. How things change ... Shaene ... Jack wrote on 02/12/2008 02:25:27 AM: I had never previously seen the term Shannon, defined to mean 1 mole of bits (6.02 x 10^23 bits). -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Definition of a Shannon (was Big Sorts)
6.022[1415] x 10^23 in this putative definition of a Shannon is Avogadro's number, a count of the number of atoms in 12 grams of isotopically pure carbon-12. Claude Shannon certainly deserves to be memorialized in some such way; but an analogous count of the number of atoms in 28 grams of isotopically pure silicon-28 would have more, if still only tenuous, relevance to what we do. John Gilmore Ashland, MA 01721-1817 USA _ Color coding for safety: Windows Live Hotmail alerts you to suspicious email. http://windowslive.com/Explore/Hotmail?ocid=TXT_TAGLM_WL_hotmail_acq_safety_112008 -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
