Hi, Am 29.09.2016 um 14:00 schrieb Burkhard Linke: > On 09/29/2016 01:46 PM, Sascha Vogt wrote: >>>> Can you check/verify that the deleted objects are actually gone on the >>>> backing pool? >> How do I check that? Aka how to find out on which OSD a particular >> object in the cache pool ends up in the backing pool? >> >> Ie. I have a 0-byte file in the cache pool: >> ./current/11.26_head/DIR_6/DIR_2/DIR_8/DIR_6/DIR_0/rbd\udata.3abcbb93a5057a9.0000000000004225__head_94406826__b >> >> >> I searched for the prefix in the backing pool via >>> rados -p ephemeral-vms ls | grep data.3abcbb93a5057a9 >> and nothing was found, so I guess the whole RBD image has been deleted >> from the backing pool already (or has never hit the backing pool in the >> first place) > You can use the same rados commands on the cache pool to check for > individual rados objects. Well, as shown above: rados ls didn't find any objects with the prefix. So I assume that no objects are on the backing pool for that particular 0-byte file. Now the next question, how do I get rid of it? ;) rados rm gives me a "No such file or directory" error. Is it safe to delete it then? > $ rados -p ssd ls | grep data.3abcbb93a5057a9.0000000000004225 > rbd_data.3abcbb93a5057a9.0000000000004225 > $ rados -p ssd rm rbd_data.3abcbb93a5057a9.0000000000004225 > error removing ssd>rbd_data.3abcbb93a5057a9.0000000000004225: (2) No such file or directory > $ rados -p ephemeral-vms rm rbd_data.3abcbb93a5057a9.0000000000004225 > error removing ephemeral-vms>rbd_data.3abcbb93a5057a9.0000000000004225: (2) No such file or directory > If you want to try to associate the rados objects to rbd images, you > need to know the rbd prefix of existing images. Use something like 'rbd > -p ephemeral-vms ls | xargs rbd -p ephemeral-vms info' to list > information about all rbd images, including the prefix in the > block_name_prefix row. Thanks a lot already for the information. Currently I'm running the proposed test from you (creating an image and deleting it before it hits the backing pool). Greetings -Sascha- _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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