Another idea for your consideration:
change the manifest spec. There is a
<base_include type="file"> type of entry. We could introduce a
<base_include type="uncompress_file"> type of entry. Then
bootroot_initialize could make a list of files which shouldn't be
compressed based on this, and can pass that file to bootroot_archive for
proper handling.
Thanks,
Jack
On 12/16/08 15:57, Jack Schwartz wrote:
> Hi everyone, especially Karen and Jan.
>
> Regarding the dcfs / fiocompress issue with the bootroot:
>
> fiocompress is a per-file compression. One solution to the issue
> which came up this morning around updating compressed files is to not
> compress the files which will be opened for update. This should be
> only a few files*, such as database files, which need to keep most of
> their old data.
>
> * Note: even vi opens files O_RDONLY to read them in, then opens them
> O_WRONLY|O_CREAT|O_TRUNC to write out the changed version.
>
> To try to work around this in other ways seems limited. Jan and I
> talked this morning about passing -e to svcadm to get around this
> problem when adding a service, but then what about devfsadm, where the
> problem also shows? For now, I assume we'll copy an uncompressed file.
>
> In order to keep things simple, since there are only a few files which
> require this special handling, I suggest copying all, then recopying
> the few files which don't require compression.
>
> In fact, DC already does this for the files in
> boot/solaris/filelist.ramdisk (see bootroot_archive.py). Perhaps this
> concept can be extended to include an additional list of files. There
> are other solutions, but this one would likely plug into what is
> already in place in the easiest way.
>
> Thoughts?
>
> Thanks,
> Jack
>
