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From Edison Su <>
Subject RE: Question about StoragePoolHostVO
Date Tue, 22 Oct 2013 22:52:00 GMT
The storage_pool_host_ref table is usually used to build the relationship between storage pool
and hypervisor host only. The local path in this table is not used by other code any more.
If you have specific requirement, such as store a path in this table, we can add it DefaultHostListener,
or you subclass DefaultHostListener.
HypervisorHostListener is a callback you can use, in case of host up and down. If you don't
care about this events, you don't need to use the DefaultHostListener at all.
>From cloudstack's point of view, the only requirement is that, there should be one entry
in storage_pool_host_ref for each host and its primary storage. As you pointed out, we should
remove the entry when hostDisconnected is called.
From: Mike Tutkowski []
Sent: Tuesday, October 22, 2013 12:28 PM
To:; Edison Su
Subject: Question about StoragePoolHostVO

Hi Edison (or anyone else viewing this :) ),

I'm looking at the DefaultHostListener class you had written up a while ago.

A couple questions:

1) In the "else" below, it does not appear we update the DB with the local path. Is this correct
behavior (this is just a snippet of the method, of course, but I didn't see any DB update
related to this)?

2) As you know, my storage is zone wide. Should I be adding a row to this table for each host
that connects to the management server that's in the same zone as my storage? Assuming I should,
should I implement the hostDisconnected method to remove the row? The DefaultHostListener
just returns true for the hostDisconnected method.

        StoragePoolHostVO poolHost = storagePoolHostDao.findByPoolHost(pool.getId(), hostId);
        if (poolHost == null) {
            poolHost = new StoragePoolHostVO(pool.getId(), hostId, mspAnswer.getPoolInfo().getLocalPath()
                    .replaceAll("//", "/"));
        } else {

Mike Tutkowski
Senior CloudStack Developer, SolidFire Inc.
o: 303.746.7302
Advancing the way the world uses the cloud<>(tm)

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