Isilon： SyncIQ 工作失敗，並顯示「SyncIQ 無法在來源叢集上拍攝快照。快照初始化錯誤」

問題

SyncIQ 原則在啟動後的前五分鐘內失敗並傳回錯誤 Snapshots initialization error。
 

症狀

SyncIQ 原則幾乎會立即失敗，並出現類似以下內容的警示：

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

協調器節點上的 /var/log/messages 中會記錄下列項目：

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 原則中定義的來源根目錄會設定為 /ifs/.snapshot 內的內容。這不是支援的配置。
 

確認問題。

SyncIQ 原則已將「來源根目錄」設定為 /ifs/.snapshot/ 目錄路徑。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 會回報下列錯誤：

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

注意：錯誤消息”Failing snap_create. Non-head file to snapshot.」 無法建立快照的快照，這就是原則失敗的原因。