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In-Depth Information
7-5. Starting and Stopping Cell Server Processes
Problem
You wish to stop or start storage server cell server processes.
Solution
Exadata's Cell Services processes are started automatically at system startup and stopped automatically when the
server is shut down, but as an Oracle DMA there are situations in which you may need to stop and start Cell Services
processes manually. In this recipe, we will show you how to stop and start Cell Services software on an Exadata
Storage Server using both the
service celld
command and the
cellcli
command.
■
Before testing these commands, be aware of active grid disks with aSM disk groups mounted to them.
Stopping Cell Services will dismount aSM disks as the grid disks are taken offline and after the aSM disk group
attribute
disk_repair_time
is exceeded, disks will be dropped.
Note
To stop all Cell Services software on a storage server, log in as
root
or
celladmin
and run
the following command:
1.
[root@cm01cel01 ~]# service celld stop
Stopping the RS, CELLSRV, and MS services...
The SHUTDOWN of services was successful.
[root@cm01cel01 ~]#
2.
After doing this, you can examine your ASM instance's alert log and see that our ASM
instance is offlining the disks in the storage cell we stopped. Don't worry though—when
we start up services on the storage cell, ASM will automatically correct itself:
NOTE: cache closing disk 31 of grp 1: (not open) DATA_CD_01_CM01CEL01
NOTE: cache closing disk 32 of grp 1: (not open) DATA_CD_11_CM01CEL01
NOTE: cache closing disk 33 of grp 1: (not open) DATA_CD_05_CM01CEL01
NOTE: cache closing disk 34 of grp 1: (not open) DATA_CD_08_CM01CEL01
NOTE: cache closing disk 35 of grp 1: (not open) DATA_CD_02_CM01CEL01
NOTE: PST update grp = 1 completed successfully
NOTE: Attempting voting file refresh on diskgroup DBFS_DG
NOTE: Voting file relocation is required in diskgroup DBFS_DG
NOTE: Attempting voting file relocation on diskgroup DBFS_DG
Tue Jul 31 02:03:25 2012
WARNING: Disk 24 (DATA_CD_10_CM01CEL01) in group 1 will be dropped in: (12960) secs on ASM inst 1
WARNING: Disk 25 (DATA_CD_07_CM01CEL01) in group 1 will be dropped in: (12960) secs on ASM inst 1
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