dmpfs /dev/vx/dmp
Updated: 10 Dec 2010 | 4 comments
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Hi All
What is and how do I can create this .......Pls....
dmpfs 53G 0K 5.2G 0% /dev/vx/dmp dmpfs 53G 0K 5.2G 0% /dev/vx/rdmp
Thanks
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Sorry Below is
Sorry
Below is actuall
dmpfs
VxVM 4.0 onwards introduced DMP filesystem (dmpfs) - this is used for the dmp metanodes/metadevices that map to the underlying OS devices.
The following extract is from a Linux technote - exact details may differ slightly depending on OS, but the overall principle is the same
from: VERITAS Storage Foundation (tm) and Storage Foundation HA 4.0 for Linux - An Introduction ( http://seer.entsupport.symantec.com/docs/270194.htm )
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DMP File System
The total number of disk devices (including partition devices) that are supported by the Dynamic Multipathing feature (DMP) is no longer limited to 255. This is made possible by the introduction of the dmpfs file system, which supports more than 4 billion disks with 16 partitions per disk on a system. This is many more than the number of disk devices that Linux typically supports. (This limitation is expected to be removed when the 2.6 version kernel is introduced.)
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The "filesystems" are created as part of the installation process (ie: will see them in df -k output after VxVM is installed / loaded onto the system)
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I was also thinking that this
I was also thinking that this is part of installation process but does not being created as a installation process.
Can u pls tell me any precaution beforee installation regarding this or any other method of creting this ....
Thanks
completely installed?
Is the installation complete ie: has SF/VxVM been installed and configured, or were just the packages installed?
If it was just a package install (ie: configuration steps haven't been done per installer) then possibly these dmp filesystems haven't been created yet since VxVM would be disabled/not in use yet?
Have you attempted to configure to see if the entries are created? (may need reboot to complete the install/configuration)
If configuration still does not create the entries - what OS platform and version are you using? (eg: Linux - RHEL, SUSE, etc? version number?)? What version of SF/VxVM is being installed? is there any output in the install logs that indicates error(s)?
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