Re: Some file lost when send back snapshot.

[Andrei Borzenkov <arvidjaar@gmail.com>]

26.04.2019 7:50, MASAKI Haruka пишет:
> Thank you for your reply.
> 
> # What does
> 
> @Host A ("lily" master, new volume)
> aki@lily /mnt % socat TCP-LISTEN:25500 STDOUT | sudo btrfs receive -vv . 
> 
> @Host B ("daisy" backup, having volumes)
> aki@daisy /HySlave % sudo btrfs send -v 190315-001000 | socat STDIN TCP:lily.local:25500 
> 
> ( ...Transfared 11TB... )
> 
> @Host A
> aki@lily /mnt % sudo btrfs subvolume snapshot 190315-001000 world
> Create a snapshot of '190315-001000' in './world'
> aki@lily /mnt % sudo btrfs subvolume snapshot -r world back1
> Create a readonly snapshot of 'world' in './back1'
> 
> @Host A
> aki@lily /mnt % sudo btrfs send -vv -p 190315-001000 back1 | socat STDIN tcp-connect:192.168.1.17:25555
> At subvol back1
> BTRFS_IOC_SEND returned 0
> joining genl thread
> 
> @Host B
> root@daisy /HySlave # socat TCP-LISTEN:25555 STDOUT | btrfs receive -vv .
> At snapshot back1
> receiving snapshot back1 uuid=32dda1a2-07bd-684f-b773-c5b4cd5f29c1, ctransid=2658 parent_uuid=9c10b77f-74fb-f94a-9a24-3c6d30c00ca2, parent_ctransid=2658
> BTRFS_IOC_SET_RECEIVED_SUBVOL uuid=32dda1a2-07bd-684f-b773-c5b4cd5f29c1, stransid=2658
> 
> # Host A current
> 
> aki@lily /mnt % ls
> 190315-001000  back1  back2  world
> aki@lily /mnt % sudo btrfs sub li -Rqu .
> ID 258 gen 2698 top level 5 parent_uuid -                                    received_uuid 9c10b77f-74fb-f94a-9a24-3c6d30c00ca2 uuid bc90d05c-7430-7b42-b683-702d906bb993 path 190315-001000
> ID 2139 gen 2696 top level 5 parent_uuid bc90d05c-7430-7b42-b683-702d906bb993 received_uuid -                                    uuid 23c5fede-a338-d14a-afcd-677db2e97637 path world
> ID 2140 gen 2660 top level 5 parent_uuid 23c5fede-a338-d14a-afcd-677db2e97637 received_uuid -                                    uuid 32dda1a2-07bd-684f-b773-c5b4cd5f29c1 path back1
> ID 2142 gen 2672 top level 5 parent_uuid 23c5fede-a338-d14a-afcd-677db2e97637 received_uuid -                                    uuid a8e3e041-c1fc-e443-9baf-ab481ae32b8b path back2
> 
> 
> # Host B current
> 
> aki@daisy /HySlave % pwd
> /HySlave
> aki@daisy /HySlave % ls
> 190312-010100  190315-001000  back1  back2
> [aki@daisy HySlave]$ sudo btrfs sub li -Rqu .
> ID 256 gen 36238 top level 5 parent_uuid -                                    received_uuid -                                    uuid 4e42555d-a715-0e47-bd0e-85d6eb8911e0 path slave
> ID 259 gen 35116 top level 256 parent_uuid -                                    received_uuid 9c10b77f-74fb-f94a-9a24-3c6d30c00ca2 uuid 4a91d585-ab25-0c49-b183-ae951b5377e1 path 190312-010100
> ID 3059 gen 7273 top level 256 parent_uuid 4a91d585-ab25-0c49-b183-ae951b5377e1 received_uuid 9c10b77f-74fb-f94a-9a24-3c6d30c00ca2 uuid 114cd74f-80d8-af44-a9d0-fd8ce3c991b4 path 190315-001000

You have two subvolumes with the same received_uuid. Is the content of
these subvolumes the same? Is "missing" file present in both subvolumes?

> ID 3072 gen 35112 top level 256 parent_uuid 4a91d585-ab25-0c49-b183-ae951b5377e1 received_uuid 32dda1a2-07bd-684f-b773-c5b4cd5f29c1 uuid fe7281d1-8b3e-8f46-a0b4-cdc52a1bb7aa path back1
> ID 3073 gen 36236 top level 256 parent_uuid 4a91d585-ab25-0c49-b183-ae951b5377e1 received_uuid a8e3e041-c1fc-e443-9baf-ab481ae32b8b uuid 65206183-f20d-4648-83ab-e0485b16f7af path back2
> 
> # Files missing
> 
> aki@daisy /HySlave % ls /HySlave/190315-001000/local/pub/media/sound/notmusic_in_CD 
> Little_My_Maid  SMEE  el_louis  firstkiss  gakuensai  infinity-kid  kid-memories-off  ojyo_tokkyu  samusupi  wizards_harmony  yuukyuu-chara-seala
> 
> aki@daisy /HySlave % ls /HySlave/back1/local/pub/media/sound/notmusic_in_CD
> Little_My_Maid  el_louis  firstkiss  gakuensai  infinity-kid  kid-memories-off  ojyo_tokkyu  samusupi  wizards_harmony  yuukyuu-chara-seala
> 
> aki@lily /mnt % ls /mnt/190315-001000/local/pub/media/sound/notmusic_in_CD
> Little_My_Maid  SMEE  el_louis  firstkiss  gakuensai  infinity-kid  kid-memories-off  ojyo_tokkyu  samusupi  wizards_harmony  yuukyuu-chara-seala
> 
> ki@lily /mnt % ls /mnt/back1/local/pub/media/sound/notmusic_in_CD        
> Little_My_Maid  SMEE  el_louis  firstkiss  gakuensai  infinity-kid  kid-memories-off  ojyo_tokkyu  samusupi  wizards_harmony  yuukyuu-chara-seala
> 
> aki@lily /mnt % ls /mnt/world/local/pub/media/sound/notmusic_in_CD 
> Little_My_Maid  SMEE  el_louis  firstkiss  gakuensai  infinity-kid  kid-memories-off  ojyo_tokkyu  samusupi  wizards_harmony  yuukyuu-chara-seala
> 
> 
> SMEE is missing.
> 
> 
> 
> 
> Thanks.
> 
> 
> On Thu, 25 Apr 2019 20:55:59 +0300
> Andrei Borzenkov <arvidjaar@gmail.com> wrote:
> 
>> 25.04.2019 16:34, MASAKI Haruka пишет:
>>  [...]  
>>
>> Please show
>>
>> 1. Full protocol of commands you executed (commands and their output),
>> e.g. captured using script.
>> 2. Commands used to determine missing files on both source and receive
>> sides.
>> 3. Listing of subvolumes on both source and receive sides with
>>
>> btrfs sub li -Rqu /mount/point
>>
>>  [...]  
>>