To see overview of ACFS file System ,
Oracle ASM Cluster File System
Step 1 : Basic thing to use ACFS file system is compatible.rdbms, compatible.advm parameter should be set to 11.2 or higher.
[oracle@rac1 ~]$ sqlplus / as sysasm SQL*Plus: Release 11.2.0.4.0 Production on Wed Mar 21 23:22:52 2018 Copyright (c) 1982, 2013, Oracle. All rights reserved. Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production With the Real Application Clusters and Automatic Storage Management options SQL> alter diskgroup data set attribute 'compatible.advm'='11.2'; alter diskgroup data set attribute 'compatible.advm'='11.2' * ERROR at line 1: ORA-15032: not all alterations performed ORA-15242: could not set attribute compatible.advm ORA-15238: 11.2 is not a valid value for attribute compatible.advm ORA-15477: cannot communicate with the volume driver SQL> exit Disconnected from Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production With the Real Application Clusters and Automatic Storage Management options
I got error while updating compatible.advm parameter , to set compatible.advm to 11.2 we need to first start acfsload with root access.
[root@rac1 ~]# cd /u01/app/11.2.0/grid/bin/ [root@rac1 bin]# ./acfsload start ACFS-9391: Checking for existing ADVM/ACFS installation. ACFS-9392: Validating ADVM/ACFS installation files for operating system. ACFS-9393: Verifying ASM Administrator setup. ACFS-9308: Loading installed ADVM/ACFS drivers. ACFS-9154: Loading 'oracleoks.ko' driver. ACFS-9154: Loading 'oracleadvm.ko' driver. ACFS-9154: Loading 'oracleacfs.ko' driver. ACFS-9327: Verifying ADVM/ACFS devices. ACFS-9156: Detecting control device '/dev/asm/.asm_ctl_spec'. ACFS-9156: Detecting control device '/dev/ofsctl'. ACFS-9322: completed
After starting acfsload I can change compatible.advm successfully.
[oracle@rac1 bin]$ sqlplus / as sysasm SQL*Plus: Release 11.2.0.4.0 Production on Wed Mar 21 23:24:41 2018 Copyright (c) 1982, 2013, Oracle. All rights reserved. Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production With the Real Application Clusters and Automatic Storage Management options SQL> alter diskgroup data set attribute 'compatible.advm'='11.2'; Diskgroup altered. SQL> SQL> alter diskgroup data set attribute 'compatible.rdbms'='11.2'; Diskgroup altered. SQL>
Now, Parameters are all set .
Step 2 : We need to create volume for acfs :
ASMCMD> volcreate -G data -s 3G volume1 ASMCMD> volinfo -G data -a Diskgroup Name: DATA Volume Name: VOLUME1 Volume Device: /dev/asm/volume1-167 State: ENABLED Size (MB): 3072 Resize Unit (MB): 32 Redundancy: UNPROT Stripe Columns: 4 Stripe Width (K): 128 Usage: Mountpath: ASMCMD>
Step 3: We can check details of newly created volume from sqlplus :
[oracle@rac1 ~]$ sqlplus / as sysasm
SQL*Plus: Release 11.2.0.4.0 Production on Wed Mar 21 23:48:30 2018
Copyright (c) 1982, 2013, Oracle. All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Real Application Clusters and Automatic Storage Management options
SQL> SELECT volume_name, volume_device FROM V$ASM_VOLUME
WHERE volume_name ='VOLUME1'; 2
VOLUME_NAME
------------------------------
VOLUME_DEVICE
--------------------------------------------------------------------------------
VOLUME1
/dev/asm/volume1-167
SQL>
Step 4 : Create ACFS file system using ORACLE ACFS mkfs command :
[oracle@rac1 ~]$ /sbin/mkfs -t acfs /dev/asm/volume1-167 mkfs.acfs: version = 11.2.0.4.0 mkfs.acfs: on-disk version = 39.0 mkfs.acfs: volume = /dev/asm/volume1-167 mkfs.acfs: volume size = 3221225472 mkfs.acfs: Format complete. [oracle@rac1 ~]$
Step 5 : Register file system with the acfsutil registry command [optional] :
[oracle@rac1 ~]$ /sbin/acfsutil registry -a /dev/asm/volume1-167 /u01/app/acfsmounts/myacfs acfsutil registry: mount point /u01/app/acfsmounts/myacfs successfully added to Oracle Registry [oracle@rac1 ~]$
Step 6 : Mount File System on specific directory :
[root@rac1 ~]# mkdir -p /u01/acfstest/test1 [root@rac1 ~]# [root@rac1 ~]# /bin/mount -t acfs /dev/asm/volume1-167 /u01/acfstest/test1 [root@rac1 ~]# [root@rac1 ~]# chown -R oracle:oinstall /u01/acfstest/test1/ [root@rac1 ~]#
Step 7 : we can test the ACFS mount point
[oracle@rac1 test1]$ touch test.txt [oracle@rac1 test1]$ echo "test message" > ab.txt [oracle@rac1 test1]$ cat ab.txt test message [oracle@rac1 test1]$
Accessing ACFS file system on second node :
Step 1 : Enable volume created on first node with volenable using asmcmd :
ASMCMD> volenable -G data volume1
Step 2 : Check details using volinfo :
ASMCMD> volinfo -G data -a Diskgroup Name: DATA Volume Name: VOLUME1 Volume Device: /dev/asm/volume1-167 State: ENABLED Size (MB): 3072 Resize Unit (MB): 32 Redundancy: UNPROT Stripe Columns: 4 Stripe Width (K): 128 Usage: Mountpath: ASMCMD>
Step 3 : Create directory and mount acfs file system :
[root@rac2 ~]# mkdir -p /u01/acfstest/test1 [root@rac2 ~]# [root@rac2 ~]# /bin/mount -t acfs /dev/asm/volume1-167 /u01/acfstest/test1
Step 4 : View file created with previous node :
[oracle@rac2 test1]$ cat ab.txt test message [oracle@rac2 test1]$
Stay tuned for More articles on Oracle RAC
Thank you for giving your valuable time to read the above information.
If you want to be updated with all our articles send us the Invitation or Follow us:
Telegram Channel : https://t.me/helporacle
Skant Gupta’s LinkedIn: www.linkedin.com/in/skantali/
Joel Perez’s LinkedIn: Joel Perez’s Profile
LinkedIn Group: Oracle Cloud DBAAS
Facebook Page: OracleHelp
