Avamar：由于 Data Domain 容量问题，检查点失败并MSG_ERR_DDR_ERROR结果

计划检查点和手动检查点均失败，并出现MSG_ERR_DDR_ERROR。

例如：

status.dpn

Mon Aug 19 13:33:53 WEST 2019  [AV-XXX] Mon Aug 19 12:33:53 2019 UTC (Initialized Wed Feb 11 12:42:51 2015 UTC)
Node   IP Address     Version   State   Runlevel  Srvr+Root+User Dis Suspend Load UsedMB Errlen  %Full   Percent Full and Stripe Status by Disk
0.0     10.xxx.x.xx  19.1.0-38  ONLINE fullaccess mhpu+0hpu+0hpu   1 false   0.3 0 31802 52675327  11.8%  12%(onl:4148) 11%(onl:4133) 11%(onl:4135) 11%(onl:4140)  11%(onl:4138) 11%(onl:4147)
Srvr+Root+User Modes = migrate + hfswriteable + persistwriteable + useraccntwriteable

System ID: XXXXXXXX@00:1E:67:87:C4:6B

All reported states=(ONLINE), runlevels=(fullaccess), modes=(mhpu+0hpu+0hpu)
System-Status: ok
Access-Status: full

Checkpoint failed with result MSG_ERR_DDR_ERROR : cp.20190819054530 started Mon Aug 19 06:45:31 2019 ended Mon Aug 19 06:58:24 2019, completed 24840 of 24841 stripes
Last GC: finished Mon Aug 19 05:21:35 2019 after 20m 58s >> recovered 71.89 MB (MSG_ERR_DDR_ERROR)
Last hfscheck failed with result MSG_ERR_DDR_ERROR : started Mon Aug 19 05:34:23

Data Domain 日志 （/usr/local/avamar/var/ddrmaintlogs/ddrmaint.log） 报告”I/O error“：

grep -i Error /usr/local/avamar/var/ddrmaintlogs/ddrmaint.log|grep -v -i "Error not set"

Aug 19 05:15:50 av-XXX ddrmaint.bin[49665]: Error: <4710>Datadomain garbage collect operation failed.
Aug 19 05:34:18 av-XXX ddrmaint.bin[52434]: Warning: Calling DDR_CREATE_SNAPSHOT returned result code:5009 message:I/O error
Aug 19 05:34:18 av-XXX ddrmaint.bin[52434]: Error: cp-create::execute_create_checkpoint - Failed to create checkpoint for avamar-XXXXXXX to snapshot cp.20190819042140 on ddXXX, DDR result code: 5009, desc: I/O error
Aug 19 05:34:18 av-XXX ddrmaint.bin[52434]: Error: <4760>Datadomain checkpoint create operation failed.

Data Domain （DD） 空间已达到容量。

可以通过执行以下作来验证这一点：

1.连接到 Data Domain。使用 Avamar：如何根据需要访问 Data Domain 系统作为参考。

2.检查是否有任何警报：

alerts show current

Id      Post Time                  Severity   Class        Object          Message
-----   ------------------------   --------   ----------   -------------   ----------------------------------------------------------------------------
p0-87   Fri Aug 16 21:55:33 2019   CRITICAL   Filesystem   FilesysType=2   EVT-SPACE-00004: Space usage in Data Collection has exceeded 100% threshold.
-----   ------------------------   --------   ----------   -------------   ----------------------------------------------------------------------------
There is 1 active alert.

3.运行 "df" 命令执行此操作：

df

Active Tier:
Resource           Size GiB   Used GiB   Avail GiB   Use%   Cleanable GiB*
----------------   --------   --------   ---------   ----   --------------
/data: pre-comp           -       15.1           -      -                -
/data: post-comp    30731.1    30608.8       122.3   100%             13.1
/ddvar                 49.1        8.7        37.9    19%                -
/ddvar/core           158.3        0.1       150.2     0%                -
----------------   --------   --------   ---------   ----   --------------
 * Estimated based on last cleaning of 2019/07/15 06:04:40.

Cloud Tier
Resource           Size GiB   Used GiB   Avail GiB   Use%   Cleanable GiB
----------------   --------   --------   ---------   ----   -------------
/data: pre-comp           -       19.0           -      -               -
/data: post-comp   33487.7*       20.4     33467.4     0%             0.0
----------------   --------   --------   ---------   ----   -------------
* Post-comp size is based on CLOUDTIER-CAPACITY license and might not be same as the cloud storage.

Total:
Resource           Size GiB   Used GiB   Avail GiB   Use%   Cleanable GiB
----------------   --------   --------   ---------   ----   -------------
/data: pre-comp           -       34.1           -      -               -
/data: post-comp    33829.9       36.4     33793.4     0%             0.0
/ddvar                 49.1        8.7        37.9    19%               -
/ddvar/core           158.3        0.1       150.2     0%               -
----------------   --------   --------   ---------   ----   -------------

1.在 Data Domain 上：

一个。检查文件系统清理状态：

filesys clean status 

输出示例：

未运行清理：

Cleaning finished at 2019/08/19 21:37:46

正在运行清理：

Cleaning started at 2019/08/19 06:00:02: phase 3 of 6 (pre-enumeration)
  1.6% complete,     0 GiB free; time: phase  1:26:05, total  1:48:11

b.如果清理正在运行，请等待清理完成，然后使用 df 命令检查容量。

c.c. 如果清理未运行，请检查文件系统清理计划：

filesys clean show schedule

示例输出：

Filesystem cleaning is scheduled to run "Tue" at "0700".

d. 如果需要，启动手动文件系统清理，并使用”fileysys clean watch" 命令，如下面的输出中所示。

filesys clean start

Cleaning started.  Use 'filesys clean watch' to monitor progress.

2.在 Avamar 上：

一个。解决 Data Domain 上的容量问题后，执行手动检查点：

mccli checkpoint create --override_maintenance_scheduler

b.监视直至完成，并验证它是否成功。

c. 在下一个维护窗口监视网格，以验证所有 Avamar 维护任务（检查点、检查点验证、 (hfscheck) 和垃圾数据收集成功完成。