Path: csiph.com!x330-a1.tempe.blueboxinc.net!usenet.pasdenom.info!aioe.org!news.stack.nl!newsfeed.xs4all.nl!newsfeed6.news.xs4all.nl!xs4all!newsgate.cistron.nl!newsgate.news.xs4all.nl!post.news.xs4all.nl!not-for-mail Return-Path: X-Original-To: python-list@python.org Delivered-To: python-list@mail.python.org X-Spam-Status: OK 0.001 X-Spam-Evidence: '*H*': 1.00; '*S*': 0.00; 'python,': 0.01; 'python': 0.08; '32-bit': 0.09; 'hits': 0.09; 'received:80.91': 0.09; 'received:80.91.229': 0.09; 'received:80.91.229.12': 0.09; 'received:gmane.org': 0.09; 'received:list': 0.09; 'received:lo.gmane.org': 0.09; ';-)': 0.12; 'broken': 0.12; 'question.': 0.15; 'received:dip.t-dialin.net': 0.16; 'received:t-dialin.net': 0.16; 'wrote:': 0.16; "aren't": 0.21; '64-bit': 0.23; 'from:addr:web.de': 0.23; 'cache': 0.24; 'index': 0.24; 'stefan': 0.24; 'code': 0.25; "wasn't": 0.25; 'function': 0.27; "i'm": 0.27; 'problem': 0.29; 'hash': 0.30; 'actually': 0.32; 'does': 0.32; 'to:addr:python-list': 0.33; 'agree': 0.33; 'header:X-Complaints-To:1': 0.34; 'but': 0.37; 'received:org': 0.37; 'using': 0.37; 'getting': 0.37; 'stable': 0.38; 'some': 0.38; 'hit': 0.39; 'subject:: ': 0.39; 'did': 0.39; 'to:addr:python.org': 0.40; 'storage': 0.68; 'stated': 0.70; 'design.': 0.73; 'mail:': 0.77; 'stupid': 0.91 X-Injected-Via-Gmane: http://gmane.org/ To: python-list@python.org From: Peter Otten <__peter__@web.de> Subject: Re: Hash stability Date: Sun, 15 Jan 2012 13:22:21 +0100 Organization: None References: <4f1107b7$0$29988$c3e8da3$5496439d@news.astraweb.com> <4F1205A7.70303@modelnine.org> <4F12BC8A.9040205@modelnine.org> Mime-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7Bit X-Gmane-NNTP-Posting-Host: p5084bd98.dip.t-dialin.net X-BeenThere: python-list@python.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: General discussion list for the Python programming language List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Newsgroups: comp.lang.python Message-ID: Lines: 15 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1326630152 news.xs4all.nl 6872 [2001:888:2000:d::a6]:47966 X-Complaints-To: abuse@xs4all.nl Xref: x330-a1.tempe.blueboxinc.net comp.lang.python:19006 Heiko Wundram wrote: > Am 15.01.2012 11:13, schrieb Stefan Behnel: >> That's a stupid design. Using a hash function that the application does >> not control to index into persistent storage just screams for getting the >> code broken at some point. > > I agree completely with that (I hit the corresponding problem with suds > while transitioning from 32-bit Python to 64-bit Python, where hashes > aren't stable either), but as stated in my mail: that wasn't the > original question. ;-) I'm curious: did you actually get false cache hits or just slower responses?