Rebuild AMPs from Fallback | Teradata VantageCore VMware - Rebuilding AMPs from Fallback - Teradata VantageCore VMware

Teradata® VantageCore VMware - Base, Advanced, Enterprise Tiers Getting Started Guide
Deployment
VantageCore
Edition
VMware
Product
Teradata VantageCore VMware
Release Number
Deployer 4.0
Published
October 2023
ft:locale
en-US
ft:lastEdition
2023-10-31
dita:mapPath
gwx1617319441704.ditamap
dita:ditavalPath
nxb1617391283297.ditaval
dita:id
hrd1467245928404
Product Category
Cloud
PrerequisiteBefore you begin, assess if you can recover from fallback. If more than a single AMP in the same fallback cluster is down, you cannot use this procedure.
  1. SSH into one of the nodes.
  2. Run vprocmanager.
  3. Run the command status.
  4. Look for AMPs marked as FATAL** and check the column Cluster/Host No.
    If two AMPs with the same Cluster/Host No. are Fatal, then recovery using fallback is impossible. In the following example, both AMPs in cluster 0, 3, 6, 9 are Fatal and are not recoverable.
    SYSTEM NAME: MPP160                                         17/01/12 14:40:21
                          DBS LOGICAL CONFIGURATION
                          -------------------------
                                                                   Rcv
                                                                   Jrnl/
Vproc  Rel.   Node    Can   Crash Vproc   Config   Config Cluster/ Host  TVS
Number Vproc# ID      Move  Count State   Status   Type   Host No. Type  Vproc
------ ------ ------  ----- ----- ------- -------- ------ -------- ----- -----
    0     1     1-01  Yes     0   FATAL** Online    AMP       0    On    28671
    1     2     1-01  Yes     0   FATAL** Online    AMP       1    On    28671
    2     3     1-01  Yes     0   FATAL** Online    AMP       2    On    28671
    3     4     1-01  Yes     0   FATAL** Online    AMP       3    On    28671
    4*    5     1-01  Yes     0   ONLINE  Online    AMP       4    On    28670
    5     6     1-01  Yes     0   ONLINE  Online    AMP       5    On    28670
    6     7     1-01  Yes     0   ONLINE  Online    AMP       6    On    28670
    7     8     1-01  Yes     0   ONLINE  Online    AMP       7    On    28670
    8     9     1-01  Yes     0   ONLINE  Online    AMP       8    On    28669
    9    10     1-01  Yes     0   ONLINE  Online    AMP       9    On    28669
   10    11     1-01  Yes     0   ONLINE  Online    AMP      10    On    28669
   11    12     1-01  Yes     0   ONLINE  Online    AMP      11    On    28669
   12     1     1-02  Yes     0   FATAL** Online    AMP       0    On    28668
   13     2     1-02  Yes     0   FATAL** Online    AMP       3    On    28668
   14     3     1-02  Yes     0   FATAL** Online    AMP       6    On    28668
   15     4     1-02  Yes     0   FATAL** Online    AMP       9    On    28668
  5. If recovery is possible in your vSphere client, delete the failed pdisks that correspond to the fatal AMPs.
  6. Run tdc.deploy.ps1 with the storage step using the deployed system's Node.IT.Properties and Common.IT.Properties
    This re-creates the removed pdisks.
    A copy of these two configs is located in /root/tvme on any of the nodes.
  7. When the command finishes, run tdc-rebuild as the root user.
  8. Enter your DBC account and password, then follow the prompts until the system is rebuilt.