The biggest difference in metadata usage between ocfs and ocfs2 would be
the journal. We use larger journals in ocfs2 (for performance). Also,
we use a default of 4 slots, which may be more than you require. If so,
reduce.
The other thing would be clustersize. If the volume only has large files,
then this will not be an issue. If, however, you have many small files
and are using a large clustersize, reduce cs.
To see the journal sizes, do:
$ debugfs.ocfs2 -R "ls -l //" /dev/sdX
To see the clustersize/numslots, do:
$ tunefs.ocfs2 -Q "Clustersize=%T, Slots=%N\n" /dev/sdX
For more, refer:
http://oss.oracle.com/projects/ocfs2/dist/documentation/ocfs2_faq.html#FORMAT
Sunil
Mehmet Can ÖNAL wrote:
Hi all,
I am trying to migrate my system to ocfs2 and i am testing the methods
recommended from oracle. I tried fscat tool to migrate (copy) my ocfs
data to another ocfs2 formatted disk. The copying processes is
terminated because of not enough space.
My source disk ora1 is 250 GB total space and 536 MB is free for
usage. I have clone of this source disk (using EMC storages) and I
tried to fscp from this clone. My destination disk is 250 GB total
space and as I see copying process is terminated because of not enough
space. I checked what is copied or not and I see not copied part is
not too small.
I want to ask
- Is this a special case for fscat (fscp) or is data extended while
migration from ocfs to ocfs2?
- do you know another method for migration apart from fscat and
backup/restore methods?
Thanx
İyi Çalışmalar
Mehmet Can ÖNAL
Sistem Uzman Yardımcısı
Merkezi Sistem Yönetimi Müdürlüğü
Eskişehir Yolu 4.Km. 2.Cad. No:63 C Blok
Söğütözü 06520 ANKARA
Tel : 312 289 1053
Voip : 6432
Faks : 312 2891450
[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>
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