Date: Wed, 16 Sep 2009 10:50:33 +1000 From: Andrew Snow <andrew@modulus.org> To: Zaphod Beeblebrox <zbeeble@gmail.com> Cc: freebsd-fs@freebsd.org Subject: Re: kern/138790: [zfs] ZFS ceases caching when mem demand is high Message-ID: <4AB03659.9060703@modulus.org> In-Reply-To: <5f67a8c40909151138l4c4fcd3cnc31bf3f59a781052@mail.gmail.com> References: <200909150047.n8F0l0MS096713@freefall.freebsd.org> <5f67a8c40909151138l4c4fcd3cnc31bf3f59a781052@mail.gmail.com>
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Zaphod Beeblebrox wrote: > Are we back to the old fight on dividing the system memory resource between > cache and paging again? This seems like a major regression for using ZFS > over UFS. > The idea that this might be happening has caused me to regard my ZFS store > as a largely nfs/smb appliance. > ZFS should be better than that. Why? ZFS is designed for systems with large amounts of memory to spare - I don't think it should be used for any system with less than 2GB. Most brand new systems bought these days will have at least 2GB, if not 4 or 8GB. UFS isn't going away, it is still the filesystem preferred for embedded and low-end systems. - Andrew
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