Adam Litke has posted comments on this change.

Change subject: vm: Support replication to different storage type
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Patch Set 4:

(2 comments)

Just a couple of questions on this one.

https://gerrit.ovirt.org/#/c/40185/4/vdsm/virt/vm.py
File vdsm/virt/vm.py:

Line 1036:             self.log.debug("Requesting extension for the original 
drive: %s "
Line 1037:                            "(domainID: %s, volumeID: %s)",
Line 1038:                            vmDrive.name, vmDrive.domainID, 
vmDrive.volumeID)
Line 1039:             self.__extendDriveVolume(vmDrive, vmDrive.volumeID,
Line 1040:                                      volInfo['newSize'])
Is there a reason why you extend the replica before the original drive?  Have 
you tested how this behaves if the VM gets paused with -EIO during replica 
extension?  My guess is we'd just get duplicate extension requests for the 
drive: one triggered by the libvirt event and one by __afterReplicaExtension.
Line 1041: 
Line 1042:     def __extendDriveVolume(self, vmDrive, volumeID, newSize):
Line 1043:         volInfo = {
Line 1044:             'domainID': vmDrive.domainID,


Line 3073:                                drive.name, replica)
Line 3074:             self.cif.teardownVolumePath(replica)
Line 3075:             return errCode['replicaErr']
Line 3076: 
Line 3077:         if drive.chunked or drive.replicaChunked:
If migrating from file->block, why would we want to extend drive here?
Line 3078:             try:
Line 3079:                 capacity, alloc, physical = 
self._getExtendInfo(drive)
Line 3080:                 self.extendDriveVolume(drive, drive.volumeID, 
physical,
Line 3081:                                        capacity)


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Gerrit-MessageType: comment
Gerrit-Change-Id: I70eb93082af81fe54268ee0133d1252c0d537ca8
Gerrit-PatchSet: 4
Gerrit-Project: vdsm
Gerrit-Branch: master
Gerrit-Owner: Nir Soffer <[email protected]>
Gerrit-Reviewer: Adam Litke <[email protected]>
Gerrit-Reviewer: Ala Hino <[email protected]>
Gerrit-Reviewer: Allon Mureinik <[email protected]>
Gerrit-Reviewer: Dan Kenigsberg <[email protected]>
Gerrit-Reviewer: Federico Simoncelli <[email protected]>
Gerrit-Reviewer: Francesco Romani <[email protected]>
Gerrit-Reviewer: Freddy Rolland <[email protected]>
Gerrit-Reviewer: Nir Soffer <[email protected]>
Gerrit-Reviewer: [email protected]
Gerrit-Reviewer: oVirt Jenkins CI Server
Gerrit-HasComments: Yes
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