NetApp clustermode snapmirror loadshare

NetApp clustermode snapmirror loadshare


By default, all client requests for access to a volume in an LS mirror set are granted read-only access. Read-write access is granted by accessing a special administrative mount point, which is the path that servers requiring read-write access into the LS mirror set must mount. All other clients will have read-only access. When you are accessing the admin share for write access, you are accessing the source volume. After changes are made to the source volume, the changes must be replicated to the rest of the
volumes in the LS mirror set using the snapmirror update-ls-set command, or with a scheduled
update.

example:
1. creating two 20MB volumes to serve as loadshare destinations
2. creating two loadshare mirrors on vserver grvsnfs1
3. initalize-ls the mirrors
4. create a schedule with a 1 minute interval
5. create two mountpoints on linux an mount the ls-mirrors
6. create a new volume in the vserver and watch the 1 minute update delay

1.
cluster600::> vol create -vserver grvsnfs1 -volume rootls -aggregate gr01_aggr1 -size 20MB -type DP
cluster600::> vol create -vserver grvsnfs1 -volume rootls1 -aggregate gr02_aggr1 -size 20MB -type DP

2.
cluster600::> snapmirror create -source-cluster gr -source-vserver grvsnfs1 -source-volume root_vol -destination-cluster gr -destination-vserver grvsnfs1 -destination-volume rootls -type ls
cluster600::> snapmirror create -source-cluster gr -source-vserver grvsnfs1 -source-volume root_vol -destination-cluster gr -destination-vserver grvsnfs1 -destination-volume rootls1 -type ls

3.
cluster600::> snapmirror initialize-ls-set -source-path gr://grvsnfs1/root_vol -foreground true

4.
cluster600::> job schedule interval create -name 1minute -minutes 1
cluster600::> snapmirror modify -destination-path kp://intdest/rootls1 -schedule 1minute

*taken that nfs is setup correctly and there are 2 lifs 1 on each of the 2 nodes
you can mount the loadshare mirror on both interfaces
lifs 192.168.4.85
192.168.4.88

5.
linux: mkdir /mnt/rootls
mkdir /mnt/rootls1
mount 192.168.4.85:/ /mnt/rootls
mount 192.168.4.88:/ /mnt/rootls1

6.
cluster600::> vol create -vserver grvsnfs1 -volume vol4 -aggregate gr02_aggr1 -size 100m -state online -type RW

cluster600::> vol mount -vserver grvsnfs1 -volume vol4 -junction-path /vol4 (volume mount)

Notice: Volume vol4 now has a mount point from volume root_vol. The load sharing (LS) mirrors of volume
root_vol are scheduled to be updated at 4/4/2013 15:39:53. Volume vol4 will not be visible in the
global namespace until the LS mirrors of volume root_vol have been updated.

linux:
while true
do
ls /mnt/rootls;ls /mnt/rootls1
sleep 10
done

*vol4 will pop up after about a minute.