Change in vdsm[master]: Group the cluster lock code into a new SP method

[Federico Simoncelli]

Federico Simoncelli has uploaded a new change for review.

Change subject: Group the cluster lock code into a new SP method
......................................................................

Group the cluster lock code into a new SP method

Both the create and reconstructMaster methods were sharing a very
similar code for temporarly acquiring the cluster lock.

Change-Id: I981d84af7816ccd2db64eb5beb440e9f7637f734
---
M vdsm/storage/sp.py
1 file changed, 29 insertions(+), 24 deletions(-)


  git pull ssh://gerrit.ovirt.org:29418/vdsm refs/changes/03/603/1
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Gerrit-MessageType: newchange
Gerrit-Change-Id: I981d84af7816ccd2db64eb5beb440e9f7637f734
Gerrit-PatchSet: 1
Gerrit-Project: vdsm
Gerrit-Branch: master
Gerrit-Owner: Federico Simoncelli <fsimonce(a)redhat.com&gt;

[Dan Kenigsberg]

Dan Kenigsberg has submitted this change and it was merged.

Change subject: Group the cluster lock code into a new SP method
......................................................................


Group the cluster lock code into a new SP method

Both the create and reconstructMaster methods were sharing a very
similar code for temporarly acquiring the cluster lock.

Change-Id: I981d84af7816ccd2db64eb5beb440e9f7637f734
---
M vdsm/storage/safelease.py
M vdsm/storage/sd.py
M vdsm/storage/sp.py
3 files changed, 36 insertions(+), 25 deletions(-)

Approvals:
  Federico Simoncelli: Verified
  Dan Kenigsberg: Looks good to me, approved
  Igor Lvovsky: Looks good to me, but someone else must approve


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Gerrit-MessageType: merged
Gerrit-Change-Id: I981d84af7816ccd2db64eb5beb440e9f7637f734
Gerrit-PatchSet: 6
Gerrit-Project: vdsm
Gerrit-Branch: master
Gerrit-Owner: Federico Simoncelli <fsimonce(a)redhat.com&gt;
Gerrit-Reviewer: Dan Kenigsberg <danken(a)redhat.com&gt;
Gerrit-Reviewer: Eduardo <ewarszaw(a)redhat.com&gt;
Gerrit-Reviewer: Federico Simoncelli <fsimonce(a)redhat.com&gt;
Gerrit-Reviewer: Igor Lvovsky <ilvovsky(a)redhat.com&gt;
Gerrit-Reviewer: Saggi Mizrahi <smizrahi(a)redhat.com&gt;

[Dan Kenigsberg]

Dan Kenigsberg has posted comments on this change.

Change subject: Group the cluster lock code into a new SP method
......................................................................


Patch Set 6: Looks good to me, approved

(1 inline comment)

....................................................
File vdsm/storage/sp.py
Line 500:     def _acquireTemporaryClusterLock(self, msdUUID, safeLease):
using a context manager could have been cooler... but never mind ;-)

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Gerrit-Change-Id: I981d84af7816ccd2db64eb5beb440e9f7637f734
Gerrit-PatchSet: 6
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Gerrit-Reviewer: Dan Kenigsberg <danken(a)redhat.com&gt;
Gerrit-Reviewer: Eduardo <ewarszaw(a)redhat.com&gt;
Gerrit-Reviewer: Federico Simoncelli <fsimonce(a)redhat.com&gt;
Gerrit-Reviewer: Igor Lvovsky <ilvovsky(a)redhat.com&gt;
Gerrit-Reviewer: Saggi Mizrahi <smizrahi(a)redhat.com&gt;

[Federico Simoncelli]

Federico Simoncelli has posted comments on this change.

Change subject: Group the cluster lock code into a new SP method
......................................................................


Patch Set 6: Verified

Verified in the pre-integration ticket #554.

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Gerrit-Change-Id: I981d84af7816ccd2db64eb5beb440e9f7637f734
Gerrit-PatchSet: 6
Gerrit-Project: vdsm
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Gerrit-Owner: Federico Simoncelli <fsimonce(a)redhat.com&gt;
Gerrit-Reviewer: Dan Kenigsberg <danken(a)redhat.com&gt;
Gerrit-Reviewer: Eduardo <ewarszaw(a)redhat.com&gt;
Gerrit-Reviewer: Federico Simoncelli <fsimonce(a)redhat.com&gt;
Gerrit-Reviewer: Igor Lvovsky <ilvovsky(a)redhat.com&gt;
Gerrit-Reviewer: Saggi Mizrahi <smizrahi(a)redhat.com&gt;

[Igor Lvovsky]

Igor Lvovsky has posted comments on this change.

Change subject: Group the cluster lock code into a new SP method
......................................................................


Patch Set 6: Looks good to me, but someone else must approve

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Gerrit-Reviewer: Dan Kenigsberg <danken(a)redhat.com&gt;
Gerrit-Reviewer: Eduardo <ewarszaw(a)redhat.com&gt;
Gerrit-Reviewer: Federico Simoncelli <fsimonce(a)redhat.com&gt;
Gerrit-Reviewer: Igor Lvovsky <ilvovsky(a)redhat.com&gt;
Gerrit-Reviewer: Saggi Mizrahi <smizrahi(a)redhat.com&gt;

[Igor Lvovsky]

Igor Lvovsky has posted comments on this change.

Change subject: Group the cluster lock code into a new SP method
......................................................................


Patch Set 4: Looks good to me, but someone else must approve

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Gerrit-Owner: Federico Simoncelli <fsimonce(a)redhat.com&gt;
Gerrit-Reviewer: Dan Kenigsberg <danken(a)redhat.com&gt;
Gerrit-Reviewer: Eduardo <ewarszaw(a)redhat.com&gt;
Gerrit-Reviewer: Federico Simoncelli <fsimonce(a)redhat.com&gt;
Gerrit-Reviewer: Igor Lvovsky <ilvovsky(a)redhat.com&gt;
Gerrit-Reviewer: Saggi Mizrahi <smizrahi(a)redhat.com&gt;

[Federico Simoncelli]

Federico Simoncelli has posted comments on this change.

Change subject: Group the cluster lock code into a new SP method
......................................................................


Patch Set 2: (1 inline comment)

....................................................
File vdsm/storage/sp.py
Line 635:         self._acquireTemporaryClusterLock(msdUUID, safeLease)
For what I see it adds just 1 extra "produce" (in the reconstructMaster case).

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Gerrit-Owner: Federico Simoncelli <fsimonce(a)redhat.com&gt;
Gerrit-Reviewer: Eduardo <ewarszaw(a)redhat.com&gt;
Gerrit-Reviewer: Federico Simoncelli <fsimonce(a)redhat.com&gt;
Gerrit-Reviewer: Igor Lvovsky <ilvovsky(a)redhat.com&gt;
Gerrit-Reviewer: Saggi Mizrahi <smizrahi(a)redhat.com&gt;

[Igor Lvovsky]

Igor Lvovsky has posted comments on this change.

Change subject: Group the cluster lock code into a new SP method
......................................................................


Patch Set 5: Looks good to me, but someone else must approve

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Gerrit-Reviewer: Eduardo <ewarszaw(a)redhat.com&gt;
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Gerrit-Reviewer: Igor Lvovsky <ilvovsky(a)redhat.com&gt;
Gerrit-Reviewer: Saggi Mizrahi <smizrahi(a)redhat.com&gt;

Saggi Mizrahi has posted comments on this change.

Change subject: Group the cluster lock code into a new SP method
......................................................................


Patch Set 4: Looks good to me, but someone else must approve

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Gerrit-Reviewer: Federico Simoncelli <fsimonce(a)redhat.com&gt;
Gerrit-Reviewer: Igor Lvovsky <ilvovsky(a)redhat.com&gt;
Gerrit-Reviewer: Saggi Mizrahi <smizrahi(a)redhat.com&gt;

Saggi Mizrahi has posted comments on this change.

Change subject: Group the cluster lock code into a new SP method
......................................................................


Patch Set 3: I would prefer that you didn't submit this

(1 inline comment)

....................................................
File vdsm/storage/sp.py
Line 71: POOL_TEMPORARY_HOSTID = 250
Should be lock provider specific as 250 is completely valid in safelease

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Gerrit-Reviewer: Igor Lvovsky <ilvovsky(a)redhat.com&gt;
Gerrit-Reviewer: Saggi Mizrahi <smizrahi(a)redhat.com&gt;

[Dan Kenigsberg]

Dan Kenigsberg has posted comments on this change.

Change subject: Group the cluster lock code into a new SP method
......................................................................


Patch Set 2: Looks good to me, but someone else must approve

(1 inline comment)

....................................................
File vdsm/storage/sp.py
Line 70: POOL_TEMPORARY_HOSTID = 250
I prefer keeping non-public stuff __private__. Or even function-local.

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Gerrit-Reviewer: Igor Lvovsky <ilvovsky(a)redhat.com&gt;
Gerrit-Reviewer: Saggi Mizrahi <smizrahi(a)redhat.com&gt;

[Igor Lvovsky]

Igor Lvovsky has posted comments on this change.

Change subject: Group the cluster lock code into a new SP method
......................................................................


Patch Set 2: Looks good to me, but someone else must approve

(1 inline comment)

....................................................
File vdsm/storage/sp.py
Line 635:         self._acquireTemporaryClusterLock(msdUUID, safeLease)
It's related to this patch only because this patch add 2 more unnecessary domain
produces. But, if you think that change it in different patch is good enough, It's
fine for me.

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Gerrit-Change-Id: I981d84af7816ccd2db64eb5beb440e9f7637f734
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Gerrit-Reviewer: Federico Simoncelli <fsimonce(a)redhat.com&gt;
Gerrit-Reviewer: Igor Lvovsky <ilvovsky(a)redhat.com&gt;
Gerrit-Reviewer: Saggi Mizrahi <smizrahi(a)redhat.com&gt;

[Federico Simoncelli]

Federico Simoncelli has posted comments on this change.

Change subject: Group the cluster lock code into a new SP method
......................................................................


Patch Set 2: (1 inline comment)

....................................................
File vdsm/storage/sp.py
Line 635:         self._acquireTemporaryClusterLock(msdUUID, safeLease)
This is consistent with the rest of the APIs where we always pass the (m)sdUUID. I agree
that it's "expensive" but the creation and the master migration is done very
rarely. I agree on avoiding the "producing" calls but I don't see how that
is related to this specific patch. Please let's group this API design change in an
other patch that is taking care of changing them all.

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Gerrit-Reviewer: Igor Lvovsky <ilvovsky(a)redhat.com&gt;
Gerrit-Reviewer: Saggi Mizrahi <smizrahi(a)redhat.com&gt;

[Igor Lvovsky]

Igor Lvovsky has posted comments on this change.

Change subject: Group the cluster lock code into a new SP method
......................................................................


Patch Set 2: I would prefer that you didn't submit this

(2 inline comments)

....................................................
File vdsm/storage/sp.py
Line 635:         self._acquireTemporaryClusterLock(msdUUID, safeLease)
I think you can pass here the master domain object itself  'msd'. You already
produced it. In this case you can avoid unnecessary  domain producing. I know that
it's probably will be done from the cache, but first not always and second Edu works
very hard to reduce domain produces in the code.

Line 667:             self._releaseTemporaryClusterLock(msdUUID)
same as above

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Gerrit-Reviewer: Igor Lvovsky <ilvovsky(a)redhat.com&gt;
Gerrit-Reviewer: Saggi Mizrahi <smizrahi(a)redhat.com&gt;

[Federico Simoncelli]

Federico Simoncelli has posted comments on this change.

Change subject: Group the cluster lock code into a new SP method
......................................................................


Patch Set 1: (1 inline comment)

....................................................
File vdsm/storage/sp.py
Line 70: POOL_TEMPORARY_HOSTID = 250
Yes it should be lock dependent but the purpose this patch is only refactoring the current
code. I just realized that it should remain 1000.

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Gerrit-Reviewer: Saggi Mizrahi <smizrahi(a)redhat.com&gt;

Saggi Mizrahi has posted comments on this change.

Change subject: Group the cluster lock code into a new SP method
......................................................................


Patch Set 1: Looks good to me, but someone else must approve

(1 inline comment)

If you don't think my concern should be addressed then it's fine by me. else just
fix it and send another patch,

....................................................
File vdsm/storage/sp.py
Line 70: POOL_TEMPORARY_HOSTID = 250
250 is really, it also might need to be lock implementation dependent.

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Gerrit-Reviewer: Saggi Mizrahi <smizrahi(a)redhat.com&gt;

[Igor Lvovsky]

Igor Lvovsky has posted comments on this change.

Change subject: Group the cluster lock code into a new SP method
......................................................................


Patch Set 1: Looks good to me, but someone else must approve

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