Isilon： SyncIQ 作业失败，并显示“SyncIQ failed to take a snapshot on source cluster.快照初始化错误”

问题

SyncIQ 策略在启动后的前五分钟内失败并显示错误 Snapshots initialization error。
 

症状

SyncIQ 策略几乎立即失败，并显示类似于以下内容的警报：

policy name: TestSnapshots target: 192.168.117.200) SyncIQ failed to take a snapshot on source cluster. Snapshots initialization error

以下内容记录在协调器节点上的 /var/log/messages 中：

2015-07-02T10:52:47-06:00 <0.3> maw-1(id1) /boot/kernel.amd64/kernel: [bam_snapshot.c:1487](pid 5271="isi_migrate")(tid=100646) Failing snap_create. Non-head file to snapshot 4 2015-07-02T10:52:47-06:00 <3.3> maw-1(id1) 
isi_migrate[5271]: coord[TestSnapshots:1435855951]: Can't create new snapshot (SIQ-d132211dc41614d7332515911c21d1cf-new): snapshot create failed: Invalid argument 2015-07-02T10:52:47-06:00 <3.3> maw-1(id1) 
isi_migrate[5271]: coord[TestSnapshots:1435855951]: siq_create_alert: type: 12 (policy name: TestSnapshots target: 192.168.117.200) SyncIQ failed to take a snapshot on source cluster. 
Snapshots initialization error 2015-07-02T10:52:47-06:00 <3.2> maw-1(id1) isi_migrate[5271]: coord[TestSnapshots:1435855951]: (policy name: TestSnapshots target: 192.168.117.200) 
SyncIQ failed to take a snapshot on source cluster. Snapshots initialization error 2015-07-02T10:52:47-06:00 <3.2> maw-1(id1) isi_migrate[5271]: Exiting on ilog(IL_FATAL)

原因

SyncIQ 策略中定义的源根目录设置为 /ifs/.snapshot 中的某个目录。这不是受支持的配置。
 

验证问题。

SyncIQ 策略将“源根目录”设置为 /ifs/.snapshot/ 目录路径。例如：

maw-1# isi sync policies view TestSnapshots
                        ID: d132211dc41614d7332515911c21d1cf
                       Name: TestSnapshots
                       Path: /ifs/.snapshot/testSnap2/data/SyncIQTesting
                     Action: copy
                    Enabled: Yes
                     Target: 192.168.117.200
                Description: Testing the ability to make a copy SyncIQ policy of /ifs/.snapshot/etc files
            Check Integrity: Yes
                Target Path: /ifs/data
    Target Snapshot Archive: No   
Target Snapshot Pattern: SIQ_%{SrcCluster}_%{PolicyName}_%Y-%m-%d_%H-%M
 Target Snapshot Expiration: Never
      Target Snapshot Alias: SIQ_%{SrcCluster}_%{PolicyName}
Target Detect Modifications: Yes
    Source Snapshot Archive: No
    Source Snapshot Pattern:
 Source Snapshot Expiration: Never
                   Schedule: Manually scheduled
                  Log Level: notice
          Log Removed Files: No
           Workers Per Node: 3
          Disable File Split: No
Changelist creation enabled: No
                    Resolve: -
             Last Job State: failed
               Last Started: 2015-07-02T10:52:31
               Last Success: -

/var/log/messages 报告以下错误：

2015-07-02T10:52:47-06:00 <0.3> maw-1(id1) /boot/kernel.amd64/kernel: [bam_snapshot.c:1487](pid 5271="isi_migrate")(tid=100646) Failing snap_create. Non-head file to snapshot 4 
2015-07-02T10:52:47-06:00 <3.3> maw-1(id1) isi_migrate[5271]: coord[TestSnapshots:1435855951]: Can't create new snapshot (SIQ-d132211dc41614d7332515911c21d1cf-new): snapshot create failed: Invalid argument

提醒：错误消息”Failing snap_create. Non-head file to snapshot.“无法创建快照的快照，这就是策略失败的原因。