Date: Thu, 12 Feb 1998 12:32:55 -0800 From: Julian Elischer <julian@whistle.com> To: Konrad Heuer <kheuer@gwdu60.gwdg.de> Cc: Vincent Defert <vdefert@trace.fr>, freebsd-questions@FreeBSD.ORG Subject: Re: FreeBSD vs Linux Message-ID: <34E35C77.59E2B600@whistle.com> References: <Pine.BSF.3.96.980212162047.24814A-100000@gwdu60.gwdg.de>
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The soft-update code we are testing addresses this problem. It uses a syncer similar to linux's and does 99.9% of all writes async, but with a guarantee of write order, calculated at run-time through dependancy graphs.. we're just shaking out some minor bugs in it but it's rock solid at the moment. Konrad Heuer wrote: > > > 3. Since the Linux 2nd Extended File Systems by default also buffers inode > and comparable data it's faster in operations like unpacking tar files. > With some risk one can mount a FreeBSD Fast File System with an async > option but then the dirty buffers containing critical data will be flushed > only in 30 second intervals. Linux runs a special bdflush daemon with a 5 > second interval for critical data which is more reliable. > On the other hand I found the sequential writes and (much more important) > reads of larger files are about 30%..50% faster with FreeBSD and the FFS. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe questions" in the body of the message
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