Skip to main content
  • Place orders quickly and easily
  • View orders and track your shipping status
  • Enjoy members-only rewards and discounts
  • Create and access a list of your products

Avamar — Data Domain 集成:将 Data Domain 升级到 6.1.x 后,存储在 Data Domain 上的 Avamar 快照不会过期

Summary: 将 Data Domain 升级到 6.1.x 后,存储在 Data Domain 上的 Avamar 快照不会过期。未对系统进行其他更改。

This article applies to This article does not apply to This article is not tied to any specific product. Not all product versions are identified in this article.

Symptoms

Data Domain 显示没有过期的快照。可以通过执行以下操作来验证这一点:
  1. 在 Avamar 应用工具节点上,通过运行 avmaint hfscreate 命令,并将字符串放在前面 /data/col1/avamar- 遵循:
示例:
avmaint hfscreate
1501099628
生成的 MTree 名称: /data/col1/avamar-1501099628
  1. 从 Data Domain 中,获取与 Avamar MTree 关联的快照列表:
snapshot list mtree /data/col1/<avamar-mtree-name> 
示例:
snapshot list mtree /data/col1/avamar-1501099628
  Snapshot Information for MTree: /data/col1/avamar-1501099628
----------------------------------------------
Name                Pre-Comp (GiB)   Create Date         Retain Until   Status
-----------------   --------------   -----------------   ------------   ------
cp.20170802130330         501241.1   Aug  2 2017 09:04
cp.20170802131127         501355.0   Aug  2 2017 09:11
cp.20170803120133         503440.7   Aug  3 2017 08:02
cp.20170803120726         503554.7   Aug  3 2017 08:07
cp.20170804120142         496207.0   Aug  4 2017 08:02
cp.20170804120836         496321.0   Aug  4 2017 08:09
cp.20170805130259         523295.5   Aug  5 2017 09:03
cp.20170805130955         523409.5   Aug  5 2017 09:10
cp.20170806130127         541524.5   Aug  6 2017 09:01
cp.20170806130719         541638.5   Aug  6 2017 09:07
cp.20170807130120         438037.9   Aug  7 2017 09:01
cp.20170807130712         438151.9   Aug  7 2017 09:07
-----------------   --------------   -----------------   ------------   ------

Snapshot Summary
-------------------
Total:           12
Not expired:     12
Expired:          0
在 Avamar 的 DDR 维护日志中可以看到以下事件 (/usr/local/avamar/var/ddrmaintlogs/ddrmaint.log*)
Aug  7 09:07:45 avamar ddrmaint.bin[122469]: Error: cp-delete::expire_checkpoint_snapshot - Failed to expire checkpoint: cp.20170806130719, ddr: dd.emc.com, ddr-index: 1, DDR result code: 5075, desc: the user has insufficient access rights
Aug  7 09:07:45 avamar ddrmaint.bin[122469]: Error: <4740>Datadomain checkpoint delete operation failed.
...
Aug  6 09:07:18 avamar ddrmaint.bin[176316]: Info: Data Domain configured in Stand-Alone mode.
Aug  6 09:07:18 avamar ddrmaint.bin[176316]: Info: cp-delete::execute_delete_cp - Deleting DDR Checkpoint for dpnid:<dpnid> on ddr:dd.emc.com cp: cp.20170805130259
Aug  6 09:07:18 avamar ddrmaint.bin[176316]: Info: Setting default storage unit to 'avamar-1501099628' for handle 1
Aug  6 09:07:18 avamar ddrmaint.bin[176316]: Warning: Calling DDR_EXPIRE_SNAPSHOT returned result code:5075 message:the user has insufficient access rights
Aug  6 09:07:18 avamar ddrmaint.bin[176316]: Error: cp-delete::expire_checkpoint_snapshot - Failed to expire checkpoint: cp.20170805130259, ddr: dd.emc.com, ddr-index: 1, DDR result code: 5075, desc: the user has insufficient access rights
Aug  6 09:07:18 avamar ddrmaint.bin[176316]: Error: <4740>Datadomain checkpoint delete operation failed.
Aug  6 09:07:18 avamar ddrmaint.bin[176316]: Info: ============================= cp-delete finished in 1 seconds
Aug  6 09:07:18 avamar ddrmaint.bin[176316]: Info: ============================= cp-delete cmd finished =============================
在 ddfs.info 文件中可以看到以下事件 (/ddr/var/log/debug/ddfs.info*) 在 Data Domain 上:
08/07 08:01:06.322 (tid 0x7fe7037cd930): ddboost-<avamar.emc.com-37933>: ddboost_api ERROR: ddp_snapshot_expire() failed for SUName avamar-1501099628, snapshot: cp.20170802130330, retention: -1, flags: 0 Err: 5075-Update retention of snapshot [cp.20170802130330] on Storage Unit [avamar-1501099628(nfs: Operation not permitted)

10/11 11:19:55.468 (tid 0x7f27454a63f0): ddboost-<avamar.emc.com-60566>: test-avamar.dell.emc.com Local Time: Wed Oct 11 11:19:55 2017
10/11 11:19:55.471 (tid 0x7f2cd150e830): OST_FH_PERM FAIL on storage-unit=avamar-1501099628 op=NFSPROC3_DDP_LOOKUP[27] client=test-avamar.dell.emc.com uid=500:uid or gid does not match
09/26 09:17:46.762 (tid 0x7f60d7a08410): ddboost-<avamar.emc.com-37933>: ddboost_api ERROR: ddp_snapshot_list() failed, Err: 5009-Get snapshot list on Storage Unit [avamar-1501099628] failed (nfs: I/O error)
09/26 09:18:46.472 (tid 0x7f7e1ab92d50): ddboost-<avamar.emc.com-37933>: ddboost_api ERROR: ddp_snapshot_list() failed, Err: 5009-Get snapshot list on Storage Unit

Cause

特定存储单元的 DD Boost 用户是在以前版本的 DDOS 中创建的,操作系统组为 users,而不是 admin。当 Avamar 首次连接到 Data Domain 并创建存储单元时,会发生这种情况,并且设置与以下类似的权限:
drwxr-xr-x 7 <ddboostuser> users 430 Apr 26  2016 <avamar-mtree-name>
从 DDOS 6.1.x 开始,某些存储单元操作(例如删除存储单元或使快照过期)要求存储单元的所有者是 admin 组(而不是 users 组)。

如果不是这样,这些操作将失败,并且每天会留下两个与 Avamar 检查点对应的新 Data Domain 快照,而不会过期。

如果与存储单元关联的 DD Boost 用户更改为 admin 之后的角色。
 
提醒:到目前为止,此问题只会影响 Avamar,因为其他备份应用程序没有检查用户组和权限的操作。

Resolution

通过在 Data Domain 上执行以下操作来检查注册表设置:
  1. 检索 Avamar DDBoost user
ddboost storage-unit show
Name                Pre-Comp (GiB)   Status   User              Report Physical
                                                                   Size (MiB)
-----------------   --------------   ------   ---------------   ---------------
avamar-1501099628      10808220.0   RW       ddboost-avamar               -
d025                      457051.7   RW       ddboost-avamar                 -
rman_dd                   240902.7   RW       ddboost-rman                   -
mssql                     142474.8   RW       ddboost-avamar                 -
-----------------   --------------   ------   ---------------   ---------------
在此输出中,Avamar DD Boost 用户为 ddboost-avamar
  1. 检索并记下 DD Boost 用户的用户 ID (UID): 
user show list
示例:
User list from node "localhost".
Name                Uid   Role    Last Login From   Last Login Time            Status    Disable Date
--------            ---   -----   ---------------   ------------------------   -------   ------------
sysadmin            100   admin   10.10.40.59       Tue Oct 10 14:44:52 2017    enabled   never
ddboost-avamar    500   admin   10.10.40.55        Wed Oct 11 11:07:49 2017   enabled   never
--------   ---    -----   ---------------   ------------------------   -------   ------------
2 users found.
在此实例中,UID 为 500 (但这可能会有所不同)。 
  1. 运行以下命令以检查注册表设置:
reg show protocol.ost
admin 组的组 id (GID) 为 50而用户组的组 id 为 100(不要与 sysadmin 的 UID 100 混淆)
 
注册表设置不正确(组 ID 为 100)的示例:
reg show protocol.ost
...
protocol.ost.stu_user.<avamar-mtree-name>= 500:100
protocol.ost.uid500:100 = <ddboostusername>
protocol.ost.user.<ddboostusername> = 500:100
...
如果设置不正确(其中 GID 设置为 100),请引用此知识库文章创建服务请求

然后可以检视、验证和解决此问题。

Affected Products

Avamar

Products

Avamar, Avamar Server, Data Domain
Article Properties
Article Number: 000069768
Article Type: Solution
Last Modified: 28 Oct 2024
Version:  38
Find answers to your questions from other Dell users
Support Services
Check if your device is covered by Support Services.