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тАО06-29-2008 02:47 PM
тАО06-29-2008 02:47 PM
I have an EVA4400 with a few servers. each server has a private dedicated vdisk assigned to it. This is formatted for its / fs (ext3). /boot and swap is on local disk. Each server also has 2nd and 3rd vdisks presented to them.
I am considering using brocade fencing (have a brocade switch), but am concerned that brocade fencing for the shared storage will also block my "/" filesystem - should i just stick to gnbd?
Solved! Go to Solution.
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тАО06-29-2008 04:19 PM
тАО06-29-2008 04:19 PM
Re: Brocade fencing with GFS2 and root on SAN
Ok, your / is on local disks.
>>> but am concerned that brocade fencing for the shared storage will also block my "/" filesystem
Why do you think that if you / is on local disks? Besides, if a node is fenced, there is a reason for that, in fact, is better if you have a power switch or a ILO fencing also to reboot the node.
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тАО06-29-2008 04:35 PM
тАО06-29-2008 04:35 PM
Re: Brocade fencing with GFS2 and root on SAN
/boot - /dev/cciss/c0d0p1 (local)
swap - /dev/cciss/c0d0p2 (local
/ - /dev/sda1 (SAN,unshared, ext3)
/gfs/storage - /dev/sdb1 (SAN, shared, GFS)
Now if 1 node gets fenced, it is done by san - so server would basically crash?
The data on GFS is a cache for a custom application - has data that can easily be regenerated. if it is fenced, how would it go about recovering?
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тАО06-29-2008 04:41 PM
тАО06-29-2008 04:41 PM
SolutionNormally is good idea to have / on local disks also. But in this case, yes, fencing will block access to your root file system and your server will crash.
>> if it is fenced, how would it go about recovering?
First, you must know the cause of the fencing. Once you are sure that the problem was solved, you must manually enable the sanswitch port with portenable.
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тАО06-29-2008 05:14 PM
тАО06-29-2008 05:14 PM
Re: Brocade fencing with GFS2 and root on SAN
busy looking for info on how ilo fencing works.