On Thu, Jan 15, 2009 at 05:57:10PM -0500, Eric Sproul wrote: > Eric Sproul wrote: > > Hi, > > I've been searching for the answer to this question but can't find a > > definitive > > answer. If I set "copies=2" on a dataset after I've written some files, > > will > > those older files get multiple copies after a scrub operation? > > Doh, RTFM. In zfs(1M): "Changing this property only affects newly-written > data." Sorry for the noise.
It's possible, I suppose, that when the block pointer rewrite feature is complete then you'll be able to kick off a rewrite of your pool that causes some of these options (e.g., compression) to be applied to old data. Matt Ahrens wrote about the block rewrite feature in his blog: http://blogs.sun.com/ahrens/entry/new_scrub_code I could a bright future for block pointer rewrite. _______________________________________________ storage-discuss mailing list [email protected] http://mail.opensolaris.org/mailman/listinfo/storage-discuss
