Date: Wed, 15 Jul 2020 16:23:09 +0200 From: infoomatic <infoomatic@gmx.at> To: freebsd-questions@freebsd.org, freebsd-virtualization@freebsd.org Subject: Re: zfs compression of a volume Message-ID: <b6fd49b9-ad72-2bba-1dce-3246c422e68b@gmx.at> In-Reply-To: <20200715140444.GA72748@bastion.zyxst.net> References: <20200715140444.GA72748@bastion.zyxst.net>
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Compression starts when you activate it, so all data added will be compressed. In order to have the data compressed that was on the volume before compression was set, you have to save the data again on that volume, e.g. copy the data away with dd and then dd it again to the volume. A better solution would probably be to create another volume with compression and use zfs snapshots to send the data to the new volume. On 15.07.20 16:04, tech-lists wrote: > Hi, > > If a zfs-backed bhyve instance is created, and compression is not set, > if the > instance is turned off, then compression set on the host for the > volume (and > then the bhyve instance is started), is the instance compressed in its > entirety at that time, or just data subsequently added to it? > > thanks,
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