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HP-UX:mount & filesystem options for best performance
此文档介绍HP-UX使用文件系统的IO(CIO、DIO)两种方式，主要针对于ORACLE数据库。
Setting the correct blocksizes
It is extremely important for Database performance that the filesystems use
the correct blocksize. This is equally true for direct I/O and buffered
I/O.
Using the wrong blocksize causes unnecessary I/O overhead since blocksize
used by the database processes does not match the filesystem blocksize.
o Oracle
For sapdata's use 8kb blockize
For redologs (origlog and mirrlog) use 1kb blocksize.
o Other filesystems (non-DB, executables etc.)
The default blocksize may be used.
o How to check filesystem blocksize on HP-UX:
fstyp -v | grep f_frsize)
(e.g. fstyp -v /dev/vg00/lvol3 | grep f_frsize)
o How to create filesystems:
(For 8kb blocksize)
newfs -F vxfs -b 8192 -o largefiles /dev//r
(For 4kb blocksize)
newfs -F vxfs -b 4096 -o largefiles /dev//r
(For 1kb blocksize)
How to use Concurrent I/O:
o Check Concurrent I/O is available on the HP-UX system:
- Concurrent I/O (CIO) is available from VxFS 5.0 onwards.
- To enable CIO one of the following is required:
- VxFS 5.0 with an appropriate HP Storage Management Bundle,
e.g. "hp ServiceGuard Storage Management Suite"
- VxFS 5.0.1 (HP-UX 11.31 only) with an OnlineJFS License (For
more details see
http://h20341.www2.hp.com/enterprise/w1/en/os/hpux11i-fsvm-what
s-new.html )
The following command can be used to check VxFS 5.0.1 is
installed:
# /usr/sbin/swlist -l bundle | grep -iE 'vxfs|vxvm'
The following commands can be used to check OnlineJFS is
installed/enabled:
# vxlicrep | grep -i onlinejfs
or
# swlist -l product |grep -i onlinejfs
o Make sure the correct blocksizes are being used, see the section
"setting the correct blocksizes" above.
o For systems with >=40GB Memory set the buffercache/filecache to 1%
of Physical Memory (since the cache is not used by direct I/O).
e.g. dbc_max_pct=dbc_min_pct=1 (HP-UX 11.11/11.23) or
filecache_min=filecache_max=1 (HP-UX 11.31)
o For Oracle:
- Set the Oracle Parameter "FILESYSTEMIO_OPTIONS" to "SETALL".
See SAP Note 830576 (Oracle 10.2) and 1431798 (Oracle 11.2)
- Use the following mount options in /etc/fstab:
cio,delaylog,nodatainlog
e.g.
/dev/vg01/lvol1 /test vxfs cio,delaylog,nodatainlog 0 2
- Do this for sapdata's and redologs (origlog's and mirrlog's).
Other filesystems should keep their default options (i.e.
buffered I/O).
- Note: From Oracle Version 11.2.0.2 onwards the "cio" mount
option is no longer required for the database itself, but other
applications/utilities accessing these filesystems may still
require the mount option. Therefore it is still recommended to
use the "cio" mount option.
How to use direct I/O:
o Check Direct I/O is available on the HP-UX system:
- VxFS 5.0.1 (HP-UX 11.31 only) enables direct I/O by default.
The following command can be used to check VxFS 5.0.1 is
installed:
# /usr/sbin/swlist -l bundle | grep -iE 'vxfs|vxvm'
- Prior to VxFS 5.0.1 the "OnlineJFS" product is required to
enable direct I/O:
The following commands can be used to check OnlineJFS is
installed/enabled:
# vxlicrep | grep -i onlinejfs
or
# swlist -l product |grep -i onlinejfs
o Make sure the correct blocksizes are being used, see the section
"setting the correct blocksizes" above.
o For systems with >=40GB Memory set the buffercache/filecache to 1%
of Physical Memory (since the cache is not used by direct I/O).
e.g. dbc_max_pct=dbc_min_pct=1 (HP-UX 11.11/11.23) or
filecache_min=filecache_max=1 (HP-UX 11.31)
o For Oracle:
- Set the Oracle Parameter "FILESYSTEMIO_OPTIONS" to "SETALL".
See SAP Note 830576 (Oracle 10.2) and 1431798 (Oracle 11.2)
- Use the following mount options in /etc/fstab:
convosync=direct,mincache=direct,delaylog,nodatainlog
e.g.
/dev/vg01/lvol1 /test vxfs convosync=direct,mincache=direct,delaylog,nodatainlog 0 2
- Do this for sapdata's and redologs (origlog's and mirrlog's).
Other filesystems should keep their default options (i.e.
buffered I/O).
- Note: From Oracle Version 11.2.0.2 onwards the
"convosync=direct,mincache=direct" mount options are no longer
required for the database itself, but other
applications/utilities accessing these filesystems may still
require the mount options. Therefore it is still recommended to
use the "convosync=direct,mincache=direct" mount options.
其他数据库请参考:
SAP Note 1077887 - SAP on HP-UX:mount & filesystem options for best performance
HP-UX:mount & filesystem options for best performance
此文档介绍HP-UX使用文件系统的IO(CIO、DIO)两种方式，主要针对于ORACLE数据库。
Setting the correct blocksizes
It is extremely important for Database performance that the filesystems use
the correct blocksize. This is equally true for direct I/O and buffered
I/O.
Using the wrong blocksize causes unnecessary I/O overhead since blocksize
used by the database processes does not match the filesystem blocksize.
o Oracle
For sapdata's use 8kb blockize
For redologs (origlog and mirrlog) use 1kb blocksize.
o Other filesystems (non-DB, executables etc.)
The default blocksize may be used.
o How to check filesystem blocksize on HP-UX:
fstyp -v | grep f_frsize)
(e.g. fstyp -v /dev/vg00/lvol3 | grep f_frsize)
o How to create filesystems:
(For 8kb blocksize)
newfs -F vxfs -b 8192 -o largefiles /dev//r
(For 4kb blocksize)
newfs -F vxfs -b 4096 -o largefiles /dev//r
(For 1kb blocksize)
How to use Concurrent I/O:
o Check Concurrent I/O is available on the HP-UX system:
- Concurrent I/O (CIO) is available from VxFS 5.0 onwards.
- To enable CIO one of the following is required:
- VxFS 5.0 with an appropriate HP Storage Management Bundle,
e.g. "hp ServiceGuard Storage Management Suite"
- VxFS 5.0.1 (HP-UX 11.31 only) with an OnlineJFS License (For
more details see
http://h20341.www2.hp.com/enterprise/w1/en/os/hpux11i-fsvm-what
s-new.html )
The following command can be used to check VxFS 5.0.1 is
installed:
# /usr/sbin/swlist -l bundle | grep -iE 'vxfs|vxvm'
The following commands can be used to check OnlineJFS is
installed/enabled:
# vxlicrep | grep -i onlinejfs
or
# swlist -l product |grep -i onlinejfs
o Make sure the correct blocksizes are being used, see the section
"setting the correct blocksizes" above.
o For systems with >=40GB Memory set the buffercache/filecache to 1%
of Physical Memory (since the cache is not used by direct I/O).
e.g. dbc_max_pct=dbc_min_pct=1 (HP-UX 11.11/11.23) or
filecache_min=filecache_max=1 (HP-UX 11.31)
o For Oracle:
- Set the Oracle Parameter "FILESYSTEMIO_OPTIONS" to "SETALL".
See SAP Note 830576 (Oracle 10.2) and 1431798 (Oracle 11.2)
- Use the following mount options in /etc/fstab:
cio,delaylog,nodatainlog
e.g.
/dev/vg01/lvol1 /test vxfs cio,delaylog,nodatainlog 0 2
- Do this for sapdata's and redologs (origlog's and mirrlog's).
Other filesystems should keep their default options (i.e.
buffered I/O).
- Note: From Oracle Version 11.2.0.2 onwards the "cio" mount
option is no longer required for the database itself, but other
applications/utilities accessing these filesystems may still
require the mount option. Therefore it is still recommended to
use the "cio" mount option.
How to use direct I/O:
o Check Direct I/O is available on the HP-UX system:
- VxFS 5.0.1 (HP-UX 11.31 only) enables direct I/O by default.
The following command can be used to check VxFS 5.0.1 is
installed:
# /usr/sbin/swlist -l bundle | grep -iE 'vxfs|vxvm'
- Prior to VxFS 5.0.1 the "OnlineJFS" product is required to
enable direct I/O:
The following commands can be used to check OnlineJFS is
installed/enabled:
# vxlicrep | grep -i onlinejfs
or
# swlist -l product |grep -i onlinejfs
o Make sure the correct blocksizes are being used, see the section
"setting the correct blocksizes" above.
o For systems with >=40GB Memory set the buffercache/filecache to 1%
of Physical Memory (since the cache is not used by direct I/O).
e.g. dbc_max_pct=dbc_min_pct=1 (HP-UX 11.11/11.23) or
filecache_min=filecache_max=1 (HP-UX 11.31)
o For Oracle:
- Set the Oracle Parameter "FILESYSTEMIO_OPTIONS" to "SETALL".
See SAP Note 830576 (Oracle 10.2) and 1431798 (Oracle 11.2)
- Use the following mount options in /etc/fstab:
convosync=direct,mincache=direct,delaylog,nodatainlog
e.g.
/dev/vg01/lvol1 /test vxfs convosync=direct,mincache=direct,delaylog,nodatainlog 0 2
- Do this for sapdata's and redologs (origlog's and mirrlog's).
Other filesystems should keep their default options (i.e.
buffered I/O).
- Note: From Oracle Version 11.2.0.2 onwards the
"convosync=direct,mincache=direct" mount options are no longer
required for the database itself, but other
applications/utilities accessing these filesystems may still
require the mount options. Therefore it is still recommended to
use the "convosync=direct,mincache=direct" mount options.
其他数据库请参考:
SAP Note 1077887 - SAP on HP-UX:mount & filesystem options for best performance
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How To Choose The Right TExES Practice Guide
Teach Yourself French Online Today, It's Easy
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