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
