Date: Mon, 19 Aug 2013 19:23:54 +0200 From: Johan Hendriks <joh.hendriks@gmail.com> To: Ivan Voras <ivoras@freebsd.org> Cc: freebsd-fs <freebsd-fs@freebsd.org> Subject: Re: Upgrading ZFS compression Message-ID: <CAOaKuAWDELJPpZhq1cLAL=zWhD%2B3YY8V6mBKD=wsdLPhtnzTRg@mail.gmail.com> In-Reply-To: <kut1oq$plv$1@ger.gmane.org> References: <kut1oq$plv$1@ger.gmane.org>
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Op maandag 19 augustus 2013 schreef Ivan Voras (ivoras@freebsd.org): > Hello, > > Just a quick question: if I have a file system with LZJB, write a file > on it so it gets compressed, then change the compression setting on the > file system to LZ4, will new random writes to the file use the new > compression algorithm? > > By looking at the data structures (dnode_phys_t) it looks like the > compression is set per-file object, so no. > > OTOH, new files on the file system will pick up new compression > settings, right? As far as i know all new files put on the dataset will be compressed using the new compression type. Regards Johan
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