Hi Maged,
The problem you met beacuse of the left over of older cluster.Did you remove
the db partition or you just use the old partition?
I thought Wido suggest to remove the partition then use the dd to be safe.Is it
safe I don't remove the partition and just use dd the try to destory the data
on that partition?
How would ceph-disk or ceph-volume do to the existing partition of
journal,db,wal?Will it clean it or it just uses it without any action?
2018-02-01
lin.yunfan
发件人：Maged Mokhtar <mmokh...@petasan.org>
发送时间：2018-02-01 14:22
主题：Re: [ceph-users] How to clean data of osd with ssd journal(wal, db if it is
bluestore) ?
收件人："David Turner"<drakonst...@gmail.com>
抄送："shadow_lin"<shadow_...@163.com>,"ceph-users"<ceph-users@lists.ceph.com>
I would recommend as Wido to use the dd command. block db device holds the
metada/allocation of objects stored in data block, not cleaning this is asking
for problems, besides it does not take any time. In our testing building new
custer on top of older installation, we did see many cases where osds will not
start and report an error such as fsid of cluster and/or OSD does not match
metada in BlueFS superblock...these errors do not appear if we use the dd
command.
On 2018-02-01 06:06, David Turner wrote:
I know that for filestore journals that is fine. I think it is also safe for
bluestore. Doing Wido's recommendation of writing 100MB would be a good idea,
but not necessary.
On Wed, Jan 31, 2018, 10:10 PM shadow_lin <shadow_...@163.com> wrote:
Hi David,
Thanks for your reply.
I am wondering what if I don't remove the journal(wal,db for bluestore) partion
on the ssd and only zap the data disk.Then I assign the journal(wal,db for
bluestore) partion to a new osd.What would happen?
2018-02-01
lin.yunfan
发件人：David Turner <drakonst...@gmail.com>
发送时间：2018-01-31 17:24
主题：Re: [ceph-users] How to clean data of osd with ssd journal(wal, db if it is
bluestore) ?
收件人："shadow_lin"<shadow_...@163.com>
抄送："ceph-users"<ceph-users@lists.ceph.com>
I use gdisk to remove the partition and partprobe for the OS to see the new
partition table. You can script it with sgdisk.
On Wed, Jan 31, 2018, 4:10 AM shadow_lin <shadow_...@163.com> wrote:
Hi list,
if I create an osd with journal(wal,db if it is bluestore) in the same hdd, I
use ceph-disk zap to clean the disk when I want to remove the osd and clean the
data on the disk.
But if I use a ssd partition as the journal(wal,db if it is bluestore) , how
should I clean the journal (wal,db if it is bluestore) of the osd I want to
remove?Especially when there are other osds are using other partition of the
same ssd as journals(wal,db if it is bluestore) .
2018-01-31
shadow_lin
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