The rbd_info, rbd_directory objects will remain until you delete the
pool, you don't need to clean that up, e.g. if you decide to create
new rbd images in there.
The number of remaining objects usually slowly decreases depending on
the amount of data that was deleted. Just last week I deleted a 2 TB
rbd image from a pool and it took two days until the number of objects
cleaned up, so it's nothing unusual. Just watch the number from time
to time and this thread in case the numbers don't decrease.
Zitat von icy chan <icy.kf.chan@xxxxxxxxx>:
Hi Eugen,
Thanks for your reply.
The problem is all rbd images were removed from pool rbd days ago. i.e.
both below commands also return empty:
$ rbd ls rbd
$ rados -p rbd listomapkeys rbd_directory
But below rados df still located 430K objects. Any other methods can I dig
out those ghost objects?
$ rados -p rbd df
POOL_NAME USED OBJECTS CLONES COPIES MISSING_ON_PRIMARY UNFOUND DEGRADED
RD_OPS RD WR_OPS WR USED COMPR UNDER COMPR
rbd 18 MiB 430107 0 1290321 0 0 0
141454780 6.9 TiB 42395431 11 TiB 0 B 0 B
$ rados -p rbd ls | while read obj; do echo "- "$obj; rados -p rbd stat
$obj; rados -p rbd listomapkeys $obj; echo ; done
- gateway.conf
rbd/gateway.conf mtime 2020-05-18 11:15:30.000000, size 8869
- rbd_directory
rbd/rbd_directory mtime 2020-05-18 10:59:50.000000, size 0
- rbd_info
rbd/rbd_info mtime 2020-04-16 15:07:42.000000, size 19
- rbd_trash
rbd/rbd_trash mtime 2020-05-18 11:15:30.000000, size 0
Regs,
Icy
On Tue, 19 May 2020 at 14:57, Eugen Block <eblock@xxxxxx> wrote:
That's not wrong, those are expected objects that contain information
about your rbd images. If you take a look into the rbd_directory
(while you have images in there) you'll find something like this:
host:~ $ rados -p pool listomapkeys rbd_directory
id_fe976bcfb968bf
id_ffc37728edbdab
name_01673d5d-4b12-4a44-8793-403581f7d808_disk
name_01673d5d-4b12-4a44-8793-403581f7d808_disk.config
name_volume-8a1a0825-1163-44bc-abe2-1a711daea07b
The rbd ls command uses the rbd_directory object to read from, an
excerpt from rbd man page:
---snip---
ls [-l | –long] [pool-name]
Will list all rbd images listed in the rbd_directory object.
---snip---
The gateway.conf is your iSCSI gateway configuration stored in the cluster.
Zitat von icy chan <icy.kf.chan@xxxxxxxxx>:
> Hi,
>
> The numbers of object counts from "rados df" and "rados ls" are different
> in my testing environment. I think it maybe some zero bytes or unclean
> objects since I removed all rbd images on top of it few days ago.
> How can I make it right / found out where are those ghost objects? Or i
> should ignore it since the numbers was not that high.
>
> $ rados -p rbd df
> POOL_NAME USED OBJECTS CLONES COPIES MISSING_ON_PRIMARY UNFOUND
DEGRADED
> RD_OPS RD WR_OPS WR USED COMPR UNDER COMPR
> rbd 18 MiB 430107 0 1290321 0 0
0
> 141243877 6.9 TiB 42395431 11 TiB 0 B 0 B
>
> $ rados -p rbd ls | wc -l
> 4
>
> $ rados -p rbd ls
> gateway.conf
> rbd_directory
> rbd_info
> rbd_trash
>
> Regs,
> Icy
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