Date: Thu, 01 Feb 1996 20:44:26 -0800 From: Curt Mayer <curt@emergent.com> To: freebsd-hackers@freebsd.org Subject: Re: Watchdog timers (was: Re: Multi-Port Async Cards) Message-ID: <199602020444.UAA00420@bluewhale.emergent.com> In-Reply-To: Your message of "Thu, 01 Feb 1996 11:17:12 CST." <199602011717.LAA09086@brasil.moneng.mei.com>
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> > Optional: NVram for acceleration of NFS &c. sockets > > and a battery for 4-8 Mb ram. Possibly with a little > > clock to do refresh so DRAM could be used. (cheaper) > > This is something we NEED, in order to do any sort of serious NFS service. > PrestoServe style devices are handy in many scenarios in addition to NFS - > news servers and other systems where lots of metadata updates are happening. wrong. this is a trivial way to speed up metadata writes. there is a software-only way called using an intent log. A once-boss of mine has a nfs fileserver that uses a homebrew filesystem running in user space on a cluster of pc's running freebsd that eats an auspex's lunch. how? logging. got parity protection, too.. > I think it should probably be handled as a separate entity from the rest of > this (it's not something everyone wants by a long shot). agreed. the best reason for nvram is a persistent console log. curt
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