Data Domain: Kan ikke slette øyeblikksbilde som er låst etter replikeringskontekst

Summary: Fant øyeblikksbilde, opprettet for mange år siden, og beholdes fortsatt selv om det er utløpt. Kan ikke slettes fordi den er myklåst

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Symptoms

- Øyeblikksbildet som ble opprettet for mange år siden, beholdes fortsatt, selv om det allerede er merket som utløpt:

ddboost@dd02# snapshot list mtree /data/col1/avamar-1493130520
Snapshot Information for MTree: /data/col1/avamar-1493130520
----------------------------------------------
Name                Pre-Comp (GiB)   Create Date         Retain Until        Status
-----------------   --------------   -----------------   -----------------   -------
cp.20250309131143         213612.6   Mar  9 2025 07:13   Mar 10 2025 07:39   expired
cp.20250309133359         214727.3   Mar  9 2025 07:34   Mar 10 2025 07:41   expired
cp.20250310131141         207612.0   Mar 10 2025 07:13
cp.20250310133957         208726.9   Mar 10 2025 07:40
cp.20230919134341         403018.8   Sep 19 2023 07:44   Sep 20 2023 07:34   expired 
-----------------   --------------   -----------------   -----------------   -------

- Øyeblikksbilde vises som mykt låst i loggfilen ddfs.info
MERK: Den enkleste måten å fange den filen på er å bruke scp til å kopiere den fra Data domain (DD) til en annen linux-maskin. Sørg for å ha påloggingslegitimasjonen tilgjengelig for å bruke denne syntaksen:

admin@anylinuxmachine:~/>: scp dd_username@dd_hostname:/ddr/var/log/debug/ddfs.info .

 

admin@anylinuxmachine:~/>: grep "cp.20230919134341" ddfs.info
03/11 05:54:20.569 (tid 0x7fb71d0e6f10): rmsnapshot: mid=1583172823 s_name=cp.20230919134341.
03/11 05:54:20.569 (tid 0x7fb71d0e6f10): _dm_rmsnapshot: snapshot 'cp.20230919134341' is softlocked.

- Data Domain-varselet viste ett varsel relatert til en replikeringskontekst som ikke var synkronisert:

ddboost@dd02# alerts show current
Id      Post Time                Severity Class       Object             Message															
------- ------------------------ -------- ----------- ------------------ ----------------------------------------------------------------
p0-924  Tue Nov 28 09:35:07 2023 CRITICAL Network     Interface Index=11 EVT-NETM-00001: Network interface connectivity is down on ethMc.
m0-1971 Mon Mar 10 06:56:36 2025 WARNING  Replication context=1          EVT-REPL-00006: Sync-as-of time is more than 13109 hours ago.
------- ------------------------ -------- ----------- ------------------ ----------------------------------------------------------------
There are 2 active alerts.

- Det er mulig å oppgi replikeringskontekstene i Data Domain-replikasjonskilden for å få detaljer om den konteksten #1.
- Replikasjonskontekst #1 har både kilde og destinasjon som refererer til mtree der øyeblikksbildet mykt låst er inneholdt.

avamar@dd02# replication show config
CTX Source                                                 	   Destination                                               	 Connection                        
																															 Host and Port                     
--- ---------------------------------------------------------- ------------------------------------------------------------- ------------------------------------- 
1   mtree://dd02.yourdomain.com.br/data/col1/avamar-1493130520 mtree://ddvault.yourdomain.com.br/data/col1/avamar-1493130520 ddvault.yourdomain.com.br   (default) 
2   mtree://dd02.yourdomain.com.br/data/col1/SysDR_ppmsv01     mtree://ddvault02.vault/data/col1/SysDR_ppmsv01               ddvault02.vault         	 (default) 
3   mtree://dd02.yourdomain.com.br/data/col1/SysDR_ppmsv01     mtree://ddvault02.vault/data/col1/SysDR_ppmsv01repl           ddvault02.vault         	 (default) 
4   mtree://dd02.yourdomain.com.br/data/col1/SysDR_ppmsv02     mtree://dd03.yourdomain.com.br/data/col1/SysDR-R_ppmsv02      dd03.yourdomain.com.br      (default) 
5   mtree://dd02.yourdomain.com.br/data/col1/MtreeVault        mtree://ddvault02.vault/data/col1/Mtreevaultdest          	 ddvault02.vault         	 (default) 
6   mtree://dd02.yourdomain.com.br/data/col1/avamar-1493130520 mtree://ddvault02.vault/data/col1/avamar-1493130520dest   	 ddvault02.vault         	 (default) 
7   mtree://dd02.yourdomain.com.br/data/col1/CritMtreeVault    mtree://ddvault02.vault/data/col1/CritMtreeVaultDest      	 ddvault02.vault         	 (default) 
8   mtree://dd02.yourdomain.com.br/data/col1/SysDR_ppmsv01     mtree://ddvault02.vault/data/col1/SysDR_ppmsv01dest       	 ddvault02.vault         	 (default) 
--- ---------------------------------------------------------- --------------------------------------------------------- 	 ------------------------------------- 
DD System default Max-repl-streams per context: 32

 

MERK: Under feilsøking finnes ikke lenger diagnostisert destinasjonsvert med navnet ddvault.yourdomain.com.br. Den ble slått av og slettet.

Cause

- En gammel og ikke lenger brukt replikasjonskontekst som refererer til mtreet der øyeblikksbildet eksisterer, ved kilden Data Domain, holdt den myke låsen.
- Et Data Domain er fjernet/slettet fra miljøet, men en replikasjonskontekst som refererer til at slettet Data Domain ikke ble slettet, og dermed blir igjen. 

Resolution

- Vi må bryte (er prosessen for å slette den replikeringskonteksten), fra replikeringskilden Data Domain.
- Logg på Data Domain og oppgi replikeringskonfigurasjonen for å gjennomgå og bekrefte konteksten som skal brytes/slettes (i dette eksempelet, kontekst #1):

ddboost@dd02# replication show config
CTX Source                                                 	   Destination                                               	 Connection                       
																															 Host and Port                    
--- ---------------------------------------------------------- ------------------------------------------------------------- -------------------------------------
1   mtree://dd02.yourdomain.com.br/data/col1/avamar-1493130520 mtree://ddvault.yourdomain.com.br/data/col1/avamar-1493130520 ddvault.yourdomain.com.br   (default)
2   mtree://dd02.yourdomain.com.br/data/col1/SysDR_ppmsv01     mtree://ddvault02.vault/data/col1/SysDR_ppmsv01           	 ddvault02.vault         	 (default)
3   mtree://dd02.yourdomain.com.br/data/col1/SysDR_ppmsv01     mtree://ddvault02.vault/data/col1/SysDR_ppmsv01repl       	 ddvault02.vault         	 (default)
4   mtree://dd02.yourdomain.com.br/data/col1/SysDR_ppmsv02     mtree://dd03.yourdomain.com.br/data/col1/SysDR-R_ppmsv02      dd03.yourdomain.com.br      (default)
5   mtree://dd02.yourdomain.com.br/data/col1/MtreeVault        mtree://ddvault02.vault/data/col1/Mtreevaultdest          	 ddvault02.vault         	 (default)
6   mtree://dd02.yourdomain.com.br/data/col1/avamar-1493130520 mtree://ddvault02.vault/data/col1/avamar-1493130520dest   	 ddvault02.vault         	 (default)
7   mtree://dd02.yourdomain.com.br/data/col1/CritMtreeVault    mtree://ddvault02.vault/data/col1/CritMtreeVaultDest      	 ddvault02.vault         	 (default)
8   mtree://dd02.yourdomain.com.br/data/col1/SysDR_ppmsv01     mtree://ddvault02.vault/data/col1/SysDR_ppmsv01dest       	 ddvault02.vault         	 (default)
--- ---------------------------------------------------------- ------------------------------------------------------------- -------------------------------------
DD System default Max-repl-streams per context: 32

- Utsted kommandoen for å bryte den replikeringskonteksten:

ddboost@dd02# replication break rctx://1
The 'replication break' command irrevocably turns off logical
replication from this mtree.  To reconfigure the mtree
for replication, the destination mtree must not exist,
or, alternatively, 'replication resync' must be used.
        Are you sure? (yes|no) [no]: yes
ok, proceeding.
ddboost@dd02#
MERK: Meldingen som vises under pausekjøringen, brukes utelukkende på replikeringskonteksten som slettes. Det påvirker IKKE de gjenværende replikeringskontekstene.


- List replikeringskonfigurasjonen på nytt for å sikre at replikeringskonteksten #1 er borte:

ddboost@dd02# replication show config
CTX Source                                                 	   Destination                                             	Connection                    
																													    Host and Port                 
--- ---------------------------------------------------------- -------------------------------------------------------- ----------------------------------
2   mtree://dd02.yourdomain.com.br/data/col1/SysDR_ppmsv01     mtree://ddvault02.vault/data/col1/SysDR_ppmsv01         	ddvault02.vault      	 (default)
3   mtree://dd02.yourdomain.com.br/data/col1/SysDR_ppmsv01     mtree://ddvault02.vault/data/col1/SysDR_ppmsv01repl     	ddvault02.vault      	 (default)
4   mtree://dd02.yourdomain.com.br/data/col1/SysDR_ppmsv02     mtree://dd03.yourdomain.com.br/data/col1/SysDR-R_ppmsv02 dd03.yourdomain.com.br   (default)
5   mtree://dd02.yourdomain.com.br/data/col1/MtreeVault        mtree://ddvault02.vault/data/col1/Mtreevaultdest        	ddvault02.vault      	 (default)
6   mtree://dd02.yourdomain.com.br/data/col1/avamar-1493130520 mtree://ddvault02.vault/data/col1/avamar-1493130520dest 	ddvault02.vault      	 (default)
7   mtree://dd02.yourdomain.com.br/data/col1/CritMtreeVault    mtree://ddvault02.vault/data/col1/CritMtreeVaultDest    	ddvault02.vault      	 (default)
8   mtree://dd02.yourdomain.com.br/data/col1/SysDR_ppmsv01     mtree://ddvault02.vault/data/col1/SysDR_ppmsv01dest     	ddvault02.vault      	 (default)
--- ---------------------------------------------------------- -------------------------------------------------------- ----------------------------------
DD System default Max-repl-streams per context: 32

- Bekreft når replikasjonskonteksten #1 er slettet, at det gamle øyeblikksbildet automatisk merkes som ikke utløpt:

ddboost@dd02# snapshot list mtree /data/col1/avamar-1493130520
Snapshot Information for MTree: /data/col1/avamar-1493130520
----------------------------------------------
Name              Pre-Comp (GiB) Create Date        Retain Until      Status
----------------- -------------- -----------------  ----------------- -------
cp.20250317130903       214805.7 Mar 17 2025 07:10  Mar 18 2025 07:32 expired
cp.20250317132705       215924.2 Mar 17 2025 07:28  Mar 18 2025 07:33 expired
cp.20250318131055       215418.1 Mar 18 2025 07:12
cp.20250318133213       216537.6 Mar 18 2025 07:33
cp.20230919134341       403018.8 Sep 19 2023 07:44  Apr  8 2025 13:25			
----------------- -------------- -----------------  ----------------- -------

- Merk at øyeblikksbildet som utløpt igjen:

ddboost@dd02# snapshot expire cp.20230919134341 mtree /data/col1/avamar-1493130520
Snapshot "cp.20230919134341" for mtree "/data/col1/avamar-1493130520" will be retained until Mar 18 2025 13:30.

ddboost@dd02# snapshot list mtree /data/col1/avamar-1493130520
Snapshot Information for MTree: /data/col1/avamar-1493130520
----------------------------------------------
Name              Pre-Comp (GiB) Create Date       Retain Until      Status
----------------- -------------- ----------------- ----------------- -------
cp.20250318131055       215418.1 Mar 18 2025 07:12
cp.20250318133213       216537.6 Mar 18 2025 07:33
cp.20230919134341       403018.8 Sep 19 2023 07:44 Mar 18 2025 13:30 expired 
----------------- -------------- ----------------- ----------------- -------

- Ser opp for det øyeblikksbildet i en oppdatert kopi av ddfs.info, øyeblikket der den myke låsen fjernes, er tatt:

admin@anylinuxmachine:~/>: grep cp.20230919134341 ddfs.info
03/18 13:25:16.663 (tid 0x7fb7969b2b40): updatesnapshot: mid=1583172823 m_name=avamar-1493130520 sid=35512 name=cp.20230919134341 retention is changed from 1741692419 to 1744140316 err :0
03/18 13:25:16.666 (tid 0x7fb7969b2b40): mrepl_snap_deref deref name=cp.20230919134341 (1583172823:35512) 1 -> 0
03/18 13:25:16.669 (tid 0x7fb7969b2b40): repl ctx 1: mrepl_protect_new_base deref'ing base cp.20230919134341 Not Referenced, USER
03/18 13:25:18.680 (tid 0x7fb7969b2b40): repl ctx: mrepl_snap_ref_cleanup Unsoftlocking snapshot name=cp.20230919134341 (1583172823:35512) 
03/18 13:30:41.710 (tid 0x7fb7969b2b40): updatesnapshot: mid=1583172823 m_name=avamar-1493130520 sid=35512 name=cp.20230919134341 retention is changed from 1744140316 to 1742326241 err :0
03/18 13:30:41.710 (tid 0x7fb7969b2b40): FM fms_snapshot_update:1933 - Updated "cp.20230919134341", mtree "/data/col1/avamar-1493130520" 1742326241
03/18 13:32:50.061 (tid 0x7fb79ba174e0): rmsnapshot: mid=1583172823 s_name=cp.20230919134341.
03/18 13:32:50.076 (tid 0x7fb79ba174e0): rmsnapshot: done, mid=1583172823 m_name=avamar-1493130520 sid=35512 s_name=cp.20230919134341 retention=1742326241 ch=<dm_mtree:40000010000,1,0,400,6,0,e98eb815,440357a6,18045d05,d3463134,cadda83,9dfa4504:> cpg_id=1 cp_uuid=cf984be60de2e768:887b264e6a0bd7d6.
admin@anylinuxmachine:~/>:

- Start en ny filsystemopprydding

ddboost@dd02# fi clean start
Cleaning started.  Use 'filesys clean watch' to monitor progress.

ddboost@dd02# fi clean status
Cleaning started at 2025/03/18 13:32:49: phase 1 of 6 (pre-merge)
  0.0% complete, 25616 GiB free; time: phase  0:00:14, total  0:00:14

- Kontroller at det gamle øyeblikksbildet nå er borte, selv om oppryddingen fortsatt pågår.
- Problemet er løst:

ddboost@dd02# snapshot list mtree /data/col1/avamar-1493130520
Snapshot Information for MTree: /data/col1/avamar-1493130520
----------------------------------------------
Name              Pre-Comp (GiB) Create Date       Retain Until      Status
----------------- -------------- ----------------- ----------------- ------
cp.20250318131055       215418.1 Mar 18 2025 07:12
cp.20250318133213       216537.6 Mar 18 2025 07:33
----------------- -------------- ----------------- ----------------- ------

Affected Products

Data Domain Boost – File System
Article Properties
Article Number: 000296945
Article Type: Solution
Last Modified: 24 Mar 2025
Version:  1
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