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тАО07-10-2006 07:31 PM
тАО07-10-2006 07:31 PM
what could be the effect of making a dumpvol
and setting it up in the LIF.
i.e.
i created a clone(vxvm rootdisk) and then using vxassist created a dumpvol in the rootdg diskgroup.
# vxassist -g rootdg make dumpvol 1g
and then set it up in LIF using,
# vxbootsetup -g rootdg rootdisk01
i don't see any changes other than an additional volume and corrosponding entry in related files.my main concern is with the effect of dumpvol in core dumps(either automatic or mannual(by taking the TOC))
thanks,
amit
Solved! Go to Solution.
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тАО07-10-2006 09:04 PM
тАО07-10-2006 09:04 PM
SolutionYour question is confusing.. However i would try to answer what I have understood.
What you have done is just you have created a volume name "dumpvol" , it has no effect on the Crash-Dump.
You need to specify directory " SAVECRASH_DIR=/var/adm/crash" in the config file "/etc/rc.config.d/savecrash" , in order to make this volume as Crasg Directory.
As far as space size is concerned , it should be greater than the memory size.
-Amit
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тАО07-10-2006 09:24 PM
тАО07-10-2006 09:24 PM
Re: figuring dump space
Can you post the output of the following command:
vxvmboot ├в v /dev/rdsk/cXtYdZ
Can you rephrase your question
GoodLuck
Darrel
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тАО07-10-2006 09:26 PM
тАО07-10-2006 09:26 PM
Re: figuring dump space
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тАО07-10-2006 10:06 PM
тАО07-10-2006 10:06 PM
Re: figuring dump space
LIF Label File @ (1k) block # 834 on VxVM Disk /dev/rdsk/c4t4d0s2:
Label Entry: 0, Boot Volume start: 3168; length: 1024 MB
Label Entry: 1, Root Volume start: 5246048; length: 1024 MB
Label Entry: 2, Swap Volume start: 1051744; length: 4096 MB
Label Entry: 3, Dump Volume start: 1051744; length: 4096 MB
i can still take the TOC,as i could do earlier but what exactly has changed other than a new volume (i.e. dumpvol) in the group "rootdg".
Thanks,
Amit
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тАО07-11-2006 02:15 AM
тАО07-11-2006 02:15 AM
Re: figuring dump space
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тАО07-11-2006 10:30 PM
тАО07-11-2006 10:30 PM
Re: figuring dump space
i uncommented the variable
SAVECRASH=0 and also the varible SAVECRASH_DIR=/var/adm/mycrash from "/etc/rc.config.d/savecrash" and then took the TOC. the TOC was completed but i didn't get any dumps in this directory.
thanks,
Amit
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тАО07-11-2006 10:41 PM
тАО07-11-2006 10:41 PM
Re: figuring dump space
i did savecrash=0 (which mean disabling the saving of crash).
now after setting this variable to 1 ,it saved the dump in the desired directory.
thanks,
amit
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тАО07-11-2006 10:54 PM
тАО07-11-2006 10:54 PM
Re: figuring dump space
According to Amit chuahan, altering the variables in /etc/rc.config.d/savecrash changes the location for saving dumps.but where does this "dumpvol" come into picture?
i could have done the alteration in the"/etc/rc.config.d/savecrash" file without creating "dumpvol" in "rootdg" disk group.rite?
so how to use this "dumpvol"? and how to see the contents of this logical volume?
thanks,
amit mehta
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тАО07-12-2006 02:10 AM
тАО07-12-2006 02:10 AM
Re: figuring dump space
You only need to save the dump image to another location if the swap area and dump area are one and the same. When the machine is rebooted and before the swap area is actually used (for swap), the savecrash routines copy the dump image into a directory BUT if you have separate dump and swap areas then there is no need to do the copy because swap activity will not overwrite the dump image.