Path: csiph.com!x330-a1.tempe.blueboxinc.net!usenet.pasdenom.info!aioe.org!eternal-september.org!feeder.eternal-september.org!.POSTED!not-for-mail From: Eric Sosman Newsgroups: comp.lang.java.programmer Subject: Re: Is there a file limit size of 2GB in JDK 1.5 Date: Tue, 08 Nov 2011 21:03:51 -0500 Organization: A noiseless patient Spider Lines: 24 Message-ID: References: <4e77f588$0$314$14726298@news.sunsite.dk> <4e7a8087$0$281$14726298@news.sunsite.dk> <4e7bdfa9$0$286$14726298@news.sunsite.dk> <4eb8926b$0$284$14726298@news.sunsite.dk> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Injection-Date: Wed, 9 Nov 2011 02:04:48 +0000 (UTC) Injection-Info: mx04.eternal-september.org; posting-host="HSlJAUb3pGXi3i7ZL/HoAw"; logging-data="23101"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX19DGa8a33oNkXKZ9GtImWr/" User-Agent: Mozilla/5.0 (Windows NT 5.1; rv:7.0.1) Gecko/20110929 Thunderbird/7.0.1 In-Reply-To: Cancel-Lock: sha1:ZT3VHoT4K/RNyRvzks5PzViT5Lo= Xref: x330-a1.tempe.blueboxinc.net comp.lang.java.programmer:9792 On 11/8/2011 9:54 AM, Roedy Green wrote: > Java has used longs 64 bit addressing for files since day 1. Some > older platforms had their own limits, but they did not come from Java. > > that gives you files up to 9,223,372,036,854,775,807 bytes. > 9 exabytes. Not likely to be a problem any time soon. Quoth Wikitedium: According to CSIRO, in the next decade, astronomers expect to be processing 10 petabytes of data every hour from the Square Kilometre Array (SKA) telescope. The array is thus expected to generate approximately one exabyte every four days of operation. According to IBM, the new SKA telescope initiative will generate over an exabyte of data every day. The same article has other rather startling estimates of present-day data capacities and rates. Some appear to contradict each other, by as much as 1-1.5 decimal orders of magnitude, but the overall burden is clear: "64 bits" is not a synonym for "forever." -- Eric Sosman esosman@ieee-dot-org.invalid