Roger Thanks for this reply. Sometime in the next millennium I guess. I did get replies from several well wishers implying that it would be a good idea if I retired as soon as possible.
More usefully, Marjolein Thunnissen reminded me of the article http://www.uic.edu/labs/caz/downloads/Abad-Zapatero-PDB-rates-Acta-Cryst2012t.pdf. This gives a comprehensive analysis of growth rates. Of course exponential growth can’t go on forever – the hidden point behind my question. Regards Colin From: Roger Rowlett [mailto:rrowl...@colgate.edu] Sent: 15 May 2014 12:36 To: ccp4bb Subject: Re: [ccp4bb] PDB passes 100,000 structure milestone A logarithmic plot of cumulative entries to the PDB is approximately linear and shows a growth rate of about 15% per year. That means it doubles in size about every 5 years at current growth rate. Roger Rowlett On May 15, 2014 4:23 AM, "Colin Nave" <colin.n...@diamond.ac.uk<mailto:colin.n...@diamond.ac.uk>> wrote: From James's figure, assuming perfect lossless compression, the information content of the PDB is 20GB or about 2X10**11 bits The information content of the universe has been estimated to be 2**305 bits or 10**92 bits (this might or might not be changing). The PDB is said to be growing exponentially. If we know the coefficients, we can work out when the PDB takes over the present universe. This would be time to retire. Can anyone do this? Thanks Colin From: James Holton [mailto:jmhol...@lbl.gov<mailto:jmhol...@lbl.gov>] Sent: 14 May 2014 16:19 To: ccp4bb Subject: Re: [ccp4bb] PDB passes 100,000 structure milestone I think 249 GB is uncompressed. My local copy of the PDB only takes up 20 GB, or one Blu-Ray. I can remember a time when the whole of the PDB fit onto a single CD-ROM. The PDB booth at the ACA meeting would hand them out for free! That was impressive to me because CD-R disks were really expensive (to an undergraduate like me anyway), and I had to figure out how to do "multi-session" writes so I could back up my whole hard drive 2 or 3 times before I filled one up. And, of course, I had to take out my hard drive and go over to that really wealthy lab that had a "CD writer" to do that. Each write took about an hour, and didn't always work. Ah, those were the days. But yes, it is impressive how so much effort by so many people over so many years can be compressed into such a tiny space. "Is it not a strange fate that we should suffer so much fear and doubt for so small a thing?" -James Holton MAD Scientist On 5/14/2014 7:15 AM, MARTYN SYMMONS wrote: I reckon it's two box sets of 25 discs each - am I calculating that wrong? Maybe room for a 'making of' feature.... ;) ________________________________ From: Jon Agirre <jon.agi...@york.ac.uk<mailto:jon.agi...@york.ac.uk>><mailto:jon.agi...@york.ac.uk<mailto:jon.agi...@york.ac.uk>> To: CCP4BB@JISCMAIL.AC.UK<mailto:CCP4BB@JISCMAIL.AC.UK><mailto:CCP4BB@JISCMAIL.AC.UK<mailto:CCP4BB@JISCMAIL.AC.UK>> Sent: Wednesday, 14 May 2014, 14:28 Subject: Re: [ccp4bb] PDB passes 100,000 structure milestone 249GB? That's a whole lot of DVDs! On 14 May 2014 14:08, MARTYN SYMMONS <martainn_oshioma...@btinternet.com<mailto:martainn_oshioma...@btinternet.com><mailto:martainn_oshioma...@btinternet.com<mailto:martainn_oshioma...@btinternet.com>>> wrote: Although the line boasting that the PDB adds up to 'more than 249 GBbytes (sic) of storage' was obviously written by someone from a pre i-tunes generation.... http://www.wwpdb.org/news/news_2014.html#13-May-2014 ;) -M. ________________________________ From: mesters <mest...@biochem.uni-luebeck.de<mailto:mest...@biochem.uni-luebeck.de><mailto:mest...@biochem.uni-luebeck.de<mailto:mest...@biochem.uni-luebeck.de>>> To: CCP4BB@JISCMAIL.AC.UK<mailto:CCP4BB@JISCMAIL.AC.UK><mailto:CCP4BB@JISCMAIL.AC.UK<mailto:CCP4BB@JISCMAIL.AC.UK>> Sent: Wednesday, 14 May 2014, 13:41 Subject: Re: [ccp4bb] PDB passes 100,000 structure milestone Amazing, great! And, which structure ended up as number 100.000? - J. - Am 14.05.14 10:42, schrieb battle: The Worldwide Protein Data Bank (wwPDB) organization is proud to announce that the Protein Data Bank archive now contains more than 100,000 entries. Established in 1971, this central, public archive of experimentally-determined protein and nucleic acid structures has reached a critical milestone thanks to the efforts of structural biologists throughout the world. Read the full story at: http://www.wwpdb.org/news/news_2014.html#13-May-2014 -- Gary Battle on behalf on the wwPDB -- Dr. Jeroen R. 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