[SCM] Samba Shared Repository - branch master updated - release-4-0-0alpha8-970-gd6270df
jra at samba.org
Thu Aug 13 13:40:12 MDT 2009
On Thu, Aug 13, 2009 at 02:35:07PM -0500, Gerald Carter wrote:
> > On Thu, Aug 13, 2009 at 10:53:36AM +0200, Stefan (metze) Metzmacher wrote:
> >> Can we please use an idl based union to store this information?
> > Actually I'd rather not. I'm getting concerned about EA space,
> > normally we only have 64k available, and we're now using EA
> > space for the security descriptors, which can potentially
> > be quite large. What advantage do you see to doing it this
> > way over individual EA's storing specific metadata ?
> Are the linux docs still correct that this is fs dependent?
> In the current ext2, ext3 and ext4 filesystem
> implementations, each extended attribute must fit on a
> single filesystem block (1024, 2048 or 4096 bytes, depending
> on the block size specified when the filesystem was created).
> In the XFS and reiserfs filesystem implementations, there is
> no practical limit on the number or size of extended attributes
> associated with a file, and the algorithms used to store extended
> attribute information on disk are scalable.
I don't think this is the case for ext4 but I'd have to look
at the code. I think ext4 is 64k, but I thought it was also
64k for ext3 (I think it'd been fixed a while ago). I'll have
to look in the source code to be sure.
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