Your intention is not clear to me
As ZFS is not a cluster filesystem, you cannot allow to initiator to
connect the same Target/LUN at the same time without an additional
cluster layer.
Is your intention:
1.) An application or database server is connected to the LUN and use it
to store data.
If the server fails, a backup system connects the same LUN to continue
to offer services with same data. (No concurrent LUN access)
2.) An application or database server is connected to the LUN and use it
to store data.
If the Storage fails, the server connects the an mirrored LUN on
another storage to continue to offer services with same data. (No
concurrent LUN access, LUN auto failover)
3.) An application or database server is connected to the LUN and use it
to store data.
A second system connects the same LUN to offer services with same data.
(Concurrent LUN access)
Am 25.08.2016 um 02:21 schrieb 龙白滔:
hi,
We'd like to move a HA DB deployment to SmartOS. The old deplpyment
is: a DB server is deployed on SAN storage, and two application
servers connect to the DB server and synchronize access(read
& write) to it.
We plan to re-deploy in this way on SmartOS:
1. make a raid10 zpool on a SmartOS machine, create a volume on the
zpool and expose the volume as an iSCSI target using COMSTAR;
2. deploy the two application servers on two KVM zones, and both
connect to the iSCSI target as an iSCSI initiator.
3. deploy the DB server on the iSCSI target device.
Questions:
1. is the re-deployment feasible?
2. if a native zone is preferable for the application server, how can
we synchronize two native zones' access to a same iSCSI target?
Your comments will be appreciated.
Baitao from China
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