dudekula mastan
2007-Sep-28 05:21 UTC
[zfs-discuss] What would be the exact difference between import/mount and export/unmount ?
Hi All,
What exactly import and export commands will do ?
Are they similar to mount and unmount ?
How import differs from mount and how export differs from umount ?
If you run zpool import command, it will lists all theimportable zpools and
the devices which are part of those zpools. How exactly import command works ?
In my machine I have 10 to 15 zpools, and I am pumping IO on those zpools. IO
pump tool is working fine for 2 to 3 hours after that some how my machine is
going down.
Can any one explain why it is happening ?
I am not much aware of debug tools, Can any one explain how to debug coredump
?
Your help is apprecialted.
Thanks & Regards
Masthan D
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dudekula mastan
2007-Oct-10 04:04 UTC
[zfs-discuss] What would be the exact difference between import/mount and export/unmount ?
Hi All,
Can any one explain this ?
-Mashtan D
dudekula mastan <d_mastan at yahoo.com> wrote:
Hi All,
What exactly import and export commands will do ?
Are they similar to mount and unmount ?
How import differs from mount and how export differs from umount ?
If you run zpool import command, it will lists all theimportable zpools and
the devices which are part of those zpools. How exactly import command works ?
In my machine I have 10 to 15 zpools, and I am pumping IO on those zpools. IO
pump tool is working fine for 2 to 3 hours after that some how my machine is
going down.
Can any one explain why it is happening ?
I am not much aware of debug tools, Can any one explain how to debug coredump
?
Your help is apprecialted.
Thanks & Regards
Masthan D
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Vidya Sakar N
2007-Oct-10 04:42 UTC
[zfs-discuss] What would be the exact difference between import/mount and export/unmount ?
Mastan, Import/Export are pool level commands whereas mount/unmount are file system level commands, both serving different purposes. You would typically ''export'' a pool when you want to connect the storage to a different machine and ''import'' the pool there for subsequent use in that machine, which could even be of different endianness. mount on the other hand is for the purpose of attaching a file system to the file system hierarchy at the mount point, just like the way any other file system is accessed.> If you run zpool import command, it will lists all theimportable > zpools and the devices which are part of those zpools. How exactly > import command works ?Import command looks at the device labels to extract this information.> In my machine I have 10 to 15 zpools, and I am pumping IO on those > zpools. IO pump tool is working fine for 2 to 3 hours after that > some how my machine is going down.Is it hung or is there a panic? Is the shell responsive? Are your file system / pool access commands hanging?> Can any one explain why it is happening ?If you have a responsive shell, may be you can check the threadlist and that may give some clues on where the commands are hung. You can use the following command to gather the threadlist. echo "::threadlist -v" | mdb -k> I am not much aware of debug tools, Can any one explain how to debug > coredump ?A good starting point would be the Solaris Modular Debugger Guide at http://docs.sun.com/app/docs/doc/817-2543?l=en&q=mdb Cheers, Vidya Sakar dudekula mastan wrote:> Hi All, > > Can any one explain this ? > > -Mashtan D > > > */dudekula mastan <d_mastan at yahoo.com>/* wrote: > > > Hi All, > > What exactly import and export commands will do ? > > Are they similar to mount and unmount ? > > How import differs from mount and how export differs from umount ? > > If you run zpool import command, it will lists all theimportable > zpools and the devices which are part of those zpools. How exactly > import command works ? > > In my machine I have 10 to 15 zpools, and I am pumping IO on those > zpools. IO pump tool is working fine for 2 to 3 hours after that > some how my machine is going down. > Can any one explain why it is happening ? > > I am not much aware of debug tools, Can any one explain how to debug > coredump ? > > Your help is apprecialted. > > Thanks & Regards > Masthan D > ------------------------------------------------------------------------ > Fussy? Opinionated? Impossible to please? Perfect. Join Yahoo!''s > user panel > <http://us.rd.yahoo.com/evt=48516/*http://surveylink.yahoo.com/gmrs/yahoo_panel_invite.asp?a=7> > and lay it on us. _______________________________________________ > zfs-discuss mailing list > zfs-discuss at opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/zfs-discuss > > > ------------------------------------------------------------------------ > Take the Internet to Go: Yahoo!Go puts the Internet in your pocket: > <http://us.rd.yahoo.com/evt=48253/*http://mobile.yahoo.com/go?refer=1GNXIC> > mail, news, photos & more. > > > ------------------------------------------------------------------------ > > _______________________________________________ > zfs-discuss mailing list > zfs-discuss at opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/zfs-discuss