On Sun, 5 Aug 2007, Axel Thimm wrote:
Hi,
On Sat, Jul 21, 2007 at 07:24:36AM +0000, Panu Matilainen wrote:
On Fri, 20 Jul 2007, Mark Hatle wrote:
Jeremy Sanders wrote:
Are there any plans to be able to host an RPM database over NFS? See
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=141614
In my experience (due to NFS locking), it's not possible to do an RPM
database over NFS. However you do have some options.
For our manchines which use remote root over nfs, we use an ext3 filesystem
mounted over gnbd network block devices to place the rpm database, which
appears to work (except gnbd is missing from Fedora...) It would be nice
not to have to do this.
You can either use sqlite (which is probably a bit slower, and I'm not
sure if it's still available in the rpm-maint 4.4.2.X branch. It _WAS_
in stock 4.4.2 and the rpm5.org's tree.) If you go down the route of
the sqlite database, it's still only key/value pair driven, and is much
slower the the berkleyDB interface. You may also STILL encounter
locking issues w/ sqlite (but in practice I never encountered them...)
Sqlite is available in rpm.org tree as well, no intention to remove it.
Is the conversion to sqlite painful, and if not how does one go about
it? Would it also work on RHEL3,4,5? Is there anyone really running
any RHEL with sqlite rpmdbs or would I become a guinea pig ;)?
This should give you the idea:
[EMAIL PROTECTED] tmp]$ cp -a /var/lib/rpm/ /tmp/rpmdb-sqlite
[EMAIL PROTECTED] tmp]$ rm -f /tmp/rpmdb-sqlite/__db.00*
[EMAIL PROTECTED] tmp]$ rpm -v --rebuilddbapi 4 --dbpath /tmp/rpmdb-sqlite/
--rebuilddb
[EMAIL PROTECTED] tmp]$ file rpmdb-sqlite/Packages
rpmdb-sqlite/Packages: SQLite 3.x database
[EMAIL PROTECTED] tmp]$ rpm --dbapi 4 --dbpath /tmp/rpmdb-sqlite/ -qa|wc -l
1460
So, it works at least to the point of conversion and queries. I personally
haven't tested it any further and dunno if people are actually using the
sqlite db so .. proceed with caution :)
Or you can use RPC for the berkley DB interface. I don't have details
on this, but this will use a more reliable network interface to go back
to the host for the RPM database access. This is probably be more
reliable then sqlite.
Probably the best available documentation on the subject is here:
https://www.redhat.com/archives/rpm-list/2003-May/msg00383.html
Ouch! I don't want a say solaris server having to run rpmdb_svc ... :/
Heh :)
I think the safest/easiest way to deal with rpmdb over NFS is to pull
a copy onto a local filesystem before querying.
...and also the fastest way I'd guess.
- Panu -
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