 |  | Mount Options for Oracle files for RAC databases and Clusterware when used with NFS on NAS devices (Doc ID 359515.1) |
In this Document
| Purpose |
| Scope |
| Details |
| RAC including RACone and single instance RAC |
| References |
APPLIES TO:
Solaris Cluster - Version 3.3 U1 to 3.3 U1 [Release 3.3]
Oracle Database - Enterprise Edition - Version 10.1.0.2 to 12.2.0.1 [Release 10.1 to 12.2]
Oracle Database - Standard Edition - Version 10.2.0.5 to 10.2.0.5 [Release 10.2]
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Information in this document applies to any platform.
Oracle Clusterware, Oracle Real Application Clusters, NAS
PURPOSE
The options with which the NAS systems should be mounted are described. This note does not cover the new dNFS feature that was introduced in 11g.
SCOPE
This document is relevant to all environments using Oracle Clusterware & RAC.
DETAILS
RAC including RACone and single instance RAC
In the table below
Binaries is the shared mount points where the Oracle Home and CRS_HOME is installed.
Datafiles includes Online Logs, Controlfile and Datafiles
nfsvers and vers are identical on those OS platforms that has nfsvers. The ver option is an alternative to the nfsvers option. It is included for compatibility with other operating systems
Please note that the mount options on each of the following cells are applicable only to those type of files listed in the column heading.
The non-shared GI HOME and ORACLE HOME on non-shared NFS mount point is not tested, so although noac may not be needed, its absence still cause problems at runtime because the RDBMS (and ASM) code
contains validations of the NFS mount options, so this configuration should not be used.For RMAN backup sets, image copies, and Data Pump dump files, the "NOAC" mount option should not be specified - that is because RMAN and Data Pump do not check this option and specifying this can adversely affect performance.
In 12.2, both OCR and voting disks must reside in ASM. Refer to Document 2201844.1
The NFS storage for asm diskgroup (not quorum disks) that has the OCR and voting disk must use the mount options listed for CRS Voting Disk and OCR
The NFS storage for asm diskgroup (not quorum disks) that does not have the OCR and voting disk must use the mount options listed for Oracle Datafiles
Operating System | Mount options for Binaries ## | Mount options for Oracle Datafiles The NFS storage for asm diskgroup (not quorum disks) that does not have the OCR and voting disk must also use this mount options | Mount options for CRS Voting Disk and OCR (12.1 and lower) In 12.2, both OCR and voting disks must reside in ASM. Refer to Document 2201844.1 The NFS storage for asm diskgroup (not quorum disks) that has the OCR and voting disk must also use this mount options |
| Sun Solaris * | rw,bg,hard,nointr,rsize=32768, vers=3,suid | rw,bg,hard,nointr,rsize=32768, wsize=32768,proto=tcp,noac, forcedirectio, vers=3 | rw,bg,hard,nointr,rsize=32768, wsize=32768,proto=tcp,vers=3, noac,forcedirectio |
| AIX (5L) ** | rw,bg,hard,nointr,rsize=32768, vers=3,timeo=600 | cio,rw,bg,hard,nointr,rsize=32768, | cio,rw,bg,hard,intr,rsize=32768, |
| HPUX 11.23 *** -- | rw,bg,vers=3,proto=tcp,noac, hard,nointr,timeo=600, rsize=32768,wsize=32768,suid | rw,bg,vers=3,proto=tcp,noac, forcedirectio,hard,nointr,timeo=600, rsize=32768,wsize=32768 | rw,bg,vers=3,proto=tcp,noac, forcedirectio,hard,nointr,timeo=600 ,rsize=32768,wsize=32768 |
| Windows (Use dNFS if needed. Refer to Document 1468114.1 | Not Supported | Not Supported | Not Supported |
| Linux x86 # **** | rw,bg,hard,nointr,rsize=32768, | rw,bg,hard,nointr,rsize=32768, wsize=32768,tcp,actimeo=0, vers=3,timeo=600 | rw,bg,hard,nointr,rsize=32768, |
| Linux x86-64 # **** | rw,bg,hard,nointr,rsize=32768, wsize=32768,tcp,vers=3, timeo=600, actimeo=0 | rw,bg,hard,nointr,rsize=32768, wsize=32768,tcp,actimeo=0, vers=3,timeo=600 | rw,bg,hard,nointr,rsize=32768, wsize=32768,tcp,noac,vers=3, timeo=600,actimeo=0 |
| Linux - Itanium | rw,bg,hard,nointr,rsize=32768, wsize=32768,tcp,vers=3, timeo=600, actimeo=0 | rw,bg,hard,nointr,rsize=32768, wsize=32768,tcp,actimeo=0, vers=3,timeo=600 | rw,bg,hard,nointr,rsize=32768, wsize=32768,tcp,noac,vers=3, timeo=600,actimeo=0 |
* NFS mount option “forcedirectio” is required on Solaris platforms when mounting the OCR/CRS files when using Oracle 10.1.0.4 or 10.2.0.2 or later (Oracle unpublished bug 4466428)
** AIX is only supported with NAS on AIX 5.3 TL04 and higher with Oracle 10.2.0.1 and later
*** NAS devices are only supported with HPUX 11.23 or higher ONLY
# These mount options are for Linux kernels 2.6 and above. For older kernels please check Note 279393.1
## The stated mount options for binaries are applicable only if the ORACLE HOME is shared.
ASM (Automatic Storage Management) Quorum Disks:
Soft mounts are recommended for ASM Quorum Disk mounts. Hard mounts may hang I/O and bring down the entire ASM system.
When using a soft mount, ASM handles an I/O failure gracefully, and will offline only the associated quorum disk. ASM quorom disks do not store user data, so there is no risk of data corruption on the quorum disk itself.
When using NFS for regular database files, see: General Configuration Guidelines for NAS Devices
Refer to <Docment: 1003375.1> NFS-Filesystems: Hard vs Soft mounts Explained
Due to Unpublished bug 5856342, it is necessary to use the following init.ora parameter when using NAS with all versions of RAC on Linux (x86 & X86-64 platforms) until 10.2.0.4. This bug is fixed and included in 10.2.0.4 patchset.
filesystemio_options = DIRECTIO
REFERENCES
NOTE:1567137.1 - Sun ZFS Storage Appliance: Oracle Database 11g R2 NFS Mount Point Recommendations
NOTE:279393.1 - Linux/NetApp: RHEL/SUSE Setup Recommendations for NetApp Filer Storage
NOTE:1003375.1 - NFS-Filesystems: Hard vs Soft mounts Explained