Flushing file writes to disk with 100% reliability
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From: Peter Olcott on 21 Apr 2010 19:57 "David Schwartz" <davids(a)webmaster.com> wrote in message news:1a5b8da0-de50-4e88-87ce-b0f1900d570b(a)u9g2000prm.googlegroups.com... On Apr 21, 3:19 pm, "Peter Olcott" <NoS...(a)OCR4Screen.com> wrote: > I would not need a high end database that can run in > distributed mode, I would only need a web application that > can append a few bytes to a file with these bytes coming > through HTTP. --Yep. Just make sure your web server is designed not to send an --acknowledgment unless it is sure it has the transaction information. --And do not allow the computer providing the service to continue until --it has received and validated that acknowledgment. -- --DS Yes, those are the two most crucial keys.
From: Jasen Betts on 24 Apr 2010 05:16 On 2010-04-21, Scott Lurndal <scott(a)slp53.sl.home> wrote: > "Peter Olcott" <NoSpam(a)OCR4Screen.com> writes: >> >>"Ian Collins" <ian-news(a)hotmail.com> wrote in message >>news:836u94Fvj5U5(a)mid.individual.net... >>> On 04/21/10 06:06 AM, Peter Olcott wrote: >>>> >>>> SSD have a limited life that is generally not compatible >>>> with extremely high numbers of transactions. >>>> >>> Not any more. >>> >>> They are used in the most transaction intensive (cache and >>> logs) roles in many ZFS storage configurations. They are >>> used where a very high number of IOPs are required. >>> >>> -- >>> Ian Collins >> >>100,000 writes per cell and the best ones are fried. >> http://en.wikipedia.org:80/wiki/Solid-state_drive > > Wikipedia? How about calling up Intel and asking their opinion? call them? http://download.intel.com/pressroom/kits/vssdrives/Nand_PB.pdf 10^5 cycles: straight from the horses mouth. you can probaby get more than 10^5 especially if you can quarrantine the failing cells, but Intel only promises 10^5 --- news://freenews.netfront.net/ - complaints: news(a)netfront.net ---
From: Peter Olcott on 24 Apr 2010 09:56
"Jasen Betts" <jasen(a)xnet.co.nz> wrote in message news:hquct9$744$1(a)reversiblemaps.ath.cx... > On 2010-04-21, Scott Lurndal <scott(a)slp53.sl.home> wrote: >> "Peter Olcott" <NoSpam(a)OCR4Screen.com> writes: >>> >>>"Ian Collins" <ian-news(a)hotmail.com> wrote in message >>>news:836u94Fvj5U5(a)mid.individual.net... >>>> On 04/21/10 06:06 AM, Peter Olcott wrote: >>>>> >>>>> SSD have a limited life that is generally not >>>>> compatible >>>>> with extremely high numbers of transactions. >>>>> >>>> Not any more. >>>> >>>> They are used in the most transaction intensive (cache >>>> and >>>> logs) roles in many ZFS storage configurations. They >>>> are >>>> used where a very high number of IOPs are required. >>>> >>>> -- >>>> Ian Collins >>> >>>100,000 writes per cell and the best ones are fried. >>> http://en.wikipedia.org:80/wiki/Solid-state_drive >> >> Wikipedia? How about calling up Intel and asking their >> opinion? > > call them? > > http://download.intel.com/pressroom/kits/vssdrives/Nand_PB.pdf > > 10^5 cycles: straight from the horses mouth. > > you can probaby get more than 10^5 especially if you can > quarrantine > the failing cells, but Intel only promises 10^5 > > > --- news://freenews.netfront.net/ - complaints: > news(a)netfront.net --- Intel makes both SLC and MLC, MLC has about a 100-fold shorter life than SLC. |