Date: Wed, 5 Aug 2020 19:02:14 +0930 From: Shane Ambler <FreeBSD@ShaneWare.Biz> To: Greg Marsh <greg.marsh@gmail.com>, freebsd-questions@freebsd.org Subject: Re: Question re ZFS with mixed drive speeds & types Message-ID: <a363a4bb-3203-50d4-347f-11295d25d063@ShaneWare.Biz> In-Reply-To: <575C4647-8F20-4187-9B74-2D509D31A249@gmail.com> References: <575C4647-8F20-4187-9B74-2D509D31A249@gmail.com>
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On 5/8/20 4:25 pm, Greg Marsh wrote: > Hello everyone. I hope you are well. > > I’m budgeting to upgrading my home file server. Sort of for more > data capacity, but mostly for more physical space, flexibility and to > try some things storage wise. > I ask because about 10 years ago, I was involved in a project that > had a HUGE storage component. Many of the vendors we brought in to > pitch, including Sun, were promoting tiered storage. Sun in > particular were quite proud of this tech. Their system ran ZFS and > had a hybrid of ssd, sas & SATA, with the system dynamically moving > data around the different speed/capacity drives, based on their > activity, all transparent to the application or user. ZFS can use ssd drives for a zpool cache, keeping used files on the faster disks, but I don't believe ZFS (or any disk based FS) offers any automatic load balancing between disk types. For automatic load balancing I would expect the use of a distributed file system, like glusterFS or cephFS -- FreeBSD - the place to B...Sharing Disks Shane Ambler
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