Como habilitar o Write Back no Exadata passo a passo

[root@owtcel01 ~]# dcli -l root -g cell_group “cellcli -e list cell detail” | grep “flashCacheMode”
owtcel01: flashCacheMode: WriteThrough
owtcel02: flashCacheMode: WriteThrough
owtcel03: flashCacheMode: WriteThrough
owtcel04: flashCacheMode: WriteThrough
owtcel05: flashCacheMode: WriteThrough
owtcel06: flashCacheMode: WriteThrough

</pre>
CellCLI> list cell detail
name: owtcel04
bbuTempThreshold: 60
bbuChargeThreshold: 800
bmcType: IPMI
cellVersion: OSS_11.2.3.2.1_LINUX.X64_130109
cpuCount: 24
diagHistoryDays: 7
fanCount: 8/8
fanStatus: normal
flashCacheMode: WriteThrough——————————–Current Mode
id: 1250FM5062
interconnectCount: 3
interconnect1: bondib0
iormBoost: 0.4
ipaddress1: 192.168.30.8/22
kernelVersion: 2.6.32-400.11.1.el5uek
locatorLEDStatus: off
makeModel: Oracle Corporation SUN FIRE X4270 M3 SAS
metricHistoryDays: 7
offloadEfficiency: 7,323.6
powerCount: 2/2
powerStatus: normal
releaseVersion: 11.2.3.2.1
releaseTrackingBug: 14522699
smtpFrom: “Exadata OWT HALF”
smtpFromAddr: unixasr@***
smtpServer: ***
smtpToAddr: unixasr@***
status: online
temperatureReading: 19.0
temperatureStatus: normal
upTime: 28 days, 14:34
cellsrvStatus: running
msStatus: running
rsStatus: running
<pre>

</pre>
CellCLI> drop flashcache
Flash cache owtcel03_FLASHCACHE successfully dropped
<pre>

Be sure asmdeactivationoutcome is YES  is before disabling grid disk
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</pre>
CellCLI> list griddisk attributes name,asmmodestatus,asmdeactivationoutcome
DATA_OWT_CD_00_owtcel03 ONLINE Yes
DATA_OWT_CD_01_owtcel03 ONLINE Yes
DATA_OWT_CD_02_owtcel03 ONLINE Yes
DATA_OWT_CD_03_owtcel03 ONLINE Yes
DATA_OWT_CD_04_owtcel03 ONLINE Yes
DATA_OWT_CD_05_owtcel03 ONLINE Yes
DATA_OWT_CD_06_owtcel03 ONLINE Yes
DATA_OWT_CD_07_owtcel03 ONLINE Yes
DATA_OWT_CD_08_owtcel03 ONLINE Yes
DATA_OWT_CD_09_owtcel03 ONLINE Yes
DATA_OWT_CD_10_owtcel03 ONLINE Yes
DATA_OWT_CD_11_owtcel03 ONLINE Yes
DBFS_DG_CD_02_owtcel03 ONLINE Yes
DBFS_DG_CD_03_owtcel03 ONLINE Yes
DBFS_DG_CD_04_owtcel03 ONLINE Yes
DBFS_DG_CD_05_owtcel03 ONLINE Yes
DBFS_DG_CD_06_owtcel03 ONLINE Yes
DBFS_DG_CD_07_owtcel03 ONLINE Yes
DBFS_DG_CD_08_owtcel03 ONLINE Yes
DBFS_DG_CD_09_owtcel03 ONLINE Yes
DBFS_DG_CD_10_owtcel03 ONLINE Yes
DBFS_DG_CD_11_owtcel03 ONLINE Yes
RECO_OWT_CD_00_owtcel03 ONLINE Yes
RECO_OWT_CD_01_owtcel03 ONLINE Yes
RECO_OWT_CD_02_owtcel03 ONLINE Yes
RECO_OWT_CD_03_owtcel03 ONLINE Yes
RECO_OWT_CD_04_owtcel03 ONLINE Yes
RECO_OWT_CD_05_owtcel03 ONLINE Yes
RECO_OWT_CD_06_owtcel03 ONLINE Yes
RECO_OWT_CD_07_owtcel03 ONLINE Yes
RECO_OWT_CD_08_owtcel03 ONLINE Yes
RECO_OWT_CD_09_owtcel03 ONLINE Yes
RECO_OWT_CD_10_owtcel03 ONLINE Yes
RECO_OWT_CD_11_owtcel03 ONLINE Yes
<pre>

##
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</pre>
CellCLI> alter griddisk all inactive
GridDisk DATA_OWT_CD_00_owtcel03 successfully altered
GridDisk DATA_OWT_CD_01_owtcel03 successfully altered
GridDisk DATA_OWT_CD_02_owtcel03 successfully altered
GridDisk DATA_OWT_CD_03_owtcel03 successfully altered
GridDisk DATA_OWT_CD_04_owtcel03 successfully altered
GridDisk DATA_OWT_CD_05_owtcel03 successfully altered
GridDisk DATA_OWT_CD_06_owtcel03 successfully altered
GridDisk DATA_OWT_CD_07_owtcel03 successfully altered
GridDisk DATA_OWT_CD_08_owtcel03 successfully altered
GridDisk DATA_OWT_CD_09_owtcel03 successfully altered
GridDisk DATA_OWT_CD_10_owtcel03 successfully altered
GridDisk DATA_OWT_CD_11_owtcel03 successfully altered
GridDisk DBFS_DG_CD_02_owtcel03 successfully altered
GridDisk DBFS_DG_CD_03_owtcel03 successfully altered
GridDisk DBFS_DG_CD_04_owtcel03 successfully altered
GridDisk DBFS_DG_CD_05_owtcel03 successfully altered
GridDisk DBFS_DG_CD_06_owtcel03 successfully altered
GridDisk DBFS_DG_CD_07_owtcel03 successfully altered
GridDisk DBFS_DG_CD_08_owtcel03 successfully altered
GridDisk DBFS_DG_CD_09_owtcel03 successfully altered
GridDisk DBFS_DG_CD_10_owtcel03 successfully altered
GridDisk DBFS_DG_CD_11_owtcel03 successfully altered
GridDisk RECO_OWT_CD_00_owtcel03 successfully altered
GridDisk RECO_OWT_CD_01_owtcel03 successfully altered
GridDisk RECO_OWT_CD_02_owtcel03 successfully altered
GridDisk RECO_OWT_CD_03_owtcel03 successfully altered
GridDisk RECO_OWT_CD_04_owtcel03 successfully altered
GridDisk RECO_OWT_CD_05_owtcel03 successfully altered
GridDisk RECO_OWT_CD_06_owtcel03 successfully altered
GridDisk RECO_OWT_CD_07_owtcel03 successfully altered
GridDisk RECO_OWT_CD_08_owtcel03 successfully altered
GridDisk RECO_OWT_CD_09_owtcel03 successfully altered
GridDisk RECO_OWT_CD_10_owtcel03 successfully altered
GridDisk RECO_OWT_CD_11_owtcel03 successfully altered
<pre>

##
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</pre>
CellCLI> alter cell shutdown services cellsrv

Stopping CELLSRV services…
The SHUTDOWN of CELLSRV services was successful

CellCLI> alter cell flashCacheMode=writeback
Cell owtcel03 successfully altered

CellCLI> alter cell startup services cellsrv

Starting CELLSRV services…
The STARTUP of CELLSRV services was successful
<pre>

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</pre>
CellCLI> alter griddisk all active
GridDisk DATA_OWT_CD_00_owtcel03 successfully altered
GridDisk DATA_OWT_CD_01_owtcel03 successfully altered
GridDisk DATA_OWT_CD_02_owtcel03 successfully altered
GridDisk DATA_OWT_CD_03_owtcel03 successfully altered
GridDisk DATA_OWT_CD_04_owtcel03 successfully altered
GridDisk DATA_OWT_CD_05_owtcel03 successfully altered
GridDisk DATA_OWT_CD_06_owtcel03 successfully altered
GridDisk DATA_OWT_CD_07_owtcel03 successfully altered
GridDisk DATA_OWT_CD_08_owtcel03 successfully altered
GridDisk DATA_OWT_CD_09_owtcel03 successfully altered
GridDisk DATA_OWT_CD_10_owtcel03 successfully altered
GridDisk DATA_OWT_CD_11_owtcel03 successfully altered
GridDisk DBFS_DG_CD_02_owtcel03 successfully altered
GridDisk DBFS_DG_CD_03_owtcel03 successfully altered
GridDisk DBFS_DG_CD_04_owtcel03 successfully altered
GridDisk DBFS_DG_CD_05_owtcel03 successfully altered
GridDisk DBFS_DG_CD_06_owtcel03 successfully altered
GridDisk DBFS_DG_CD_07_owtcel03 successfully altered
GridDisk DBFS_DG_CD_08_owtcel03 successfully altered
GridDisk DBFS_DG_CD_09_owtcel03 successfully altered
GridDisk DBFS_DG_CD_10_owtcel03 successfully altered
GridDisk DBFS_DG_CD_11_owtcel03 successfully altered
GridDisk RECO_OWT_CD_00_owtcel03 successfully altered
GridDisk RECO_OWT_CD_01_owtcel03 successfully altered
GridDisk RECO_OWT_CD_02_owtcel03 successfully altered
GridDisk RECO_OWT_CD_03_owtcel03 successfully altered
GridDisk RECO_OWT_CD_04_owtcel03 successfully altered
GridDisk RECO_OWT_CD_05_owtcel03 successfully altered
GridDisk RECO_OWT_CD_06_owtcel03 successfully altered
GridDisk RECO_OWT_CD_07_owtcel03 successfully altered
GridDisk RECO_OWT_CD_08_owtcel03 successfully altered
GridDisk RECO_OWT_CD_09_owtcel03 successfully altered
GridDisk RECO_OWT_CD_10_owtcel03 successfully altered
GridDisk RECO_OWT_CD_11_owtcel03 successfully altered
CellCLI> list griddisk attributes name, asmmodestatus —-wait become online
DATA_OWT_CD_00_owtcel03 SYNCING
DATA_OWT_CD_01_owtcel03 SYNCING
DATA_OWT_CD_02_owtcel03 SYNCING
DATA_OWT_CD_03_owtcel03 SYNCING
DATA_OWT_CD_04_owtcel03 SYNCING
DATA_OWT_CD_05_owtcel03 SYNCING
DATA_OWT_CD_06_owtcel03 SYNCING
DATA_OWT_CD_07_owtcel03 SYNCING
DATA_OWT_CD_08_owtcel03 SYNCING
DATA_OWT_CD_09_owtcel03 SYNCING
DATA_OWT_CD_10_owtcel03 SYNCING
DATA_OWT_CD_11_owtcel03 SYNCING
DBFS_DG_CD_02_owtcel03 SYNCING
DBFS_DG_CD_03_owtcel03 SYNCING
DBFS_DG_CD_04_owtcel03 SYNCING
DBFS_DG_CD_05_owtcel03 SYNCING
DBFS_DG_CD_06_owtcel03 SYNCING
DBFS_DG_CD_07_owtcel03 SYNCING
DBFS_DG_CD_08_owtcel03 SYNCING
DBFS_DG_CD_09_owtcel03 SYNCING
DBFS_DG_CD_10_owtcel03 SYNCING
DBFS_DG_CD_11_owtcel03 SYNCING
RECO_OWT_CD_00_owtcel03 SYNCING
RECO_OWT_CD_01_owtcel03 SYNCING
RECO_OWT_CD_02_owtcel03 SYNCING
RECO_OWT_CD_03_owtcel03 SYNCING
RECO_OWT_CD_04_owtcel03 SYNCING
RECO_OWT_CD_05_owtcel03 SYNCING
RECO_OWT_CD_06_owtcel03 SYNCING
RECO_OWT_CD_07_owtcel03 SYNCING
RECO_OWT_CD_08_owtcel03 SYNCING
RECO_OWT_CD_09_owtcel03 SYNCING
RECO_OWT_CD_10_owtcel03 SYNCING
RECO_OWT_CD_11_owtcel03 SYNCING</pre>
CellCLI> create flashcache all
Flash cache owtcel03_FLASHCACHE successfully created

CellCLI> list cell detail
name: owtcel03
bbuTempThreshold: 60
bbuChargeThreshold: 800
bmcType: IPMI
cellVersion: OSS_11.2.3.2.1_LINUX.X64_130109
cpuCount: 24
diagHistoryDays: 7
fanCount: 12/12
fanStatus: normal
flashCacheMode: writeback——————Now mode become WRITEBACK
id: 1110FMM1DG
interconnectCount: 3
interconnect1: bondib0
iormBoost: 0.0
ipaddress1: 192.168.30.7/22
kernelVersion: 2.6.32-400.11.1.el5uek
locatorLEDStatus: off
makeModel: Oracle Corporation SUN FIRE X4270 M2 SERVER SAS
metricHistoryDays: 7
notificationMethod: mail
notificationPolicy: critical,warning,clear
offloadEfficiency: 5,379.5
powerCount: 2/2
powerStatus: normal
releaseVersion: 11.2.3.2.1
releaseTrackingBug: 14522699
smtpFrom: “Exadata OWT quarter”
smtpFromAddr:***
smtpPort: 25
smtpPwd: ******
smtpServer:***
smtpToAddr: unixasr@**
smtpUser:
smtpUseSSL: FALSE
snmpSubscriber: host=10.**,port=162,community=public,type=asr
status: online
temperatureReading: 20.0
temperatureStatus: normal
upTime: 28 days, 13:52
cellsrvStatus: running
msStatus: running
rsStatus: running
####

Do these steps  for all exadata cells and then check the status:

[root@owtcel01 ~]# dcli -l root -g cell_group “cellcli -e list cell detail” | grep “flashCacheMode”
owtcel01: flashCacheMode: WriteBack
owtcel02: flashCacheMode: WriteBack
owtcel03: flashCacheMode: WriteBack
owtcel04: flashCacheMode: WriteBack
owtcel05: flashCacheMode: WriteBack
owtcel06: flashCacheMode: WriteBack

&nbsp;
<pre><pre>

===========================================================================================================================================

Steps to enable the flash in Write Back mode –

CellCli> drop flashcache
CellCLI> alter cell shutdown services cellsrv
CellCLI> alter cell flashCacheMode = WriteBack
CellCLI> alter cell startup services cellsrv
CellCLI> create flashcache all

The Write Back Cache mode can be reverted back to the Write Through Cache mode by manually flushing all the dirty blocks back to the disk

CellCLI> alter flashcache all flush
CellCLI> drop flashcache
CellCLI> alter cell shutdown services cellsrv
CellCLI> alter cell flashCacheMode=Writethrough
CellCLI> alter cell startup services cellsrv