[Gluster-users] Turning GlusterFS into something else (was Re: how well will this work)

Fred van Zwieten fvzwieten at vxcompany.com
Mon Dec 31 14:14:38 UTC 2012


Why don't you simply file a feature request. Something like a volume wide

gluster volume set <volname> delete-policy=<value>

where value is one of:

"wastebin" this is what you want. There must be another setting somewhere
that specifies how must free space must be maintained ie when the wastebin
will be emptied fifo.
"index" this is the default and current behaviour
"highwater" this is where the blocks where the file parts levels are
getting overwritten with zeroes or whatever.

Better yet, as your a C programmer, start contributing.


On Mon, Dec 31, 2012 at 2:31 PM, Whit Blauvelt
<whit.gluster at transpect.com>wrote:

> On Sun, Dec 30, 2012 at 05:12:04PM +0100, Stephan von Krawczynski wrote:
> > If I delete
> > something on a disk that is far from being full it is just plain dumb to
> > really erase this data from the disk. It won't help anyone. It will only
> hurt
> > you if you deleted it accidently. Read my lips: free disk space is wasted
> > space, just like free mem is wasted mem.
> > And _that_ is the true reason for undelete. It won't hurt anybody, and
> will
> > help some. And since it is the true goal of a fs to organise data on a
> drive
> > it is most obvious that "undelete" (you may call it lazy-delete) is a
> very
> > basic fs feature and _not_ an add-on patched onto it.
> Stephan,
> It's good to have a strong debater here like yourself. But you overlooked
> Jeff's citing "compliance reasons." I don't know what sort of data you deal
> in. But if it's anything financial, at all, there is serious jeopardy if
> deleted files aren't really deleted. Much of it has both regulatory and
> contractual requirements, plus potential legal liability.
> Yeah, I know parts of deleted files still often linger on the disk anyway.
> But maintaining an index to those files, which would be what your request
> would require, would put many of us in violation of these requirements in a
> way that that simply does not. If a system is compromised, it's going to be
> far easier for the compromiser to find deleted data if there's an available
> index to it. It's far more work, and a far more obvious intrusion, if they
> have to go sector-by-sector through the storage.
> Best,
> Whit
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