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From Mārtiņš Jakubovičs <>
Subject Re: Volume scheduler
Date Tue, 30 Dec 2014 11:42:34 GMT

I check this a little bit deeper and faced that Storage Allocator is not 
checking more than one SR. It check first suitable SR and create volume 
on it. I think, it will be useful, if ACS check all suitable SR's and 
decide from "scheduler" where to create volume. Schedulers can be 
different, for example, deploy on SR with most free space, or try to fit 
full SR first, etc. Now I can't normally control where volumes should 
create, I can remove storage TAG from SR, but this is manually work and 
it is not automatic solution, in a way we all use CloudStack.

Also, is it possible to control quotas 
(,, etc.) by used space in SR?

2014-12-30 11:47:05,328 DEBUG [o.a.c.s.a.LocalStoragePoolAllocator] 
(Job-Executor-11:ctx-c97ee1d1 ctx-9293a9d0) LocalStoragePoolAllocator 
trying to find storage pool to fit the vm
2014-12-30 11:47:05,329 DEBUG 
(Job-Executor-11:ctx-c97ee1d1 ctx-9293a9d0) 
ClusterScopeStoragePoolAllocator looking for storage pool
2014-12-30 11:47:05,329 DEBUG 
(Job-Executor-11:ctx-c97ee1d1 ctx-9293a9d0) Looking for pools in dc: 1  
pod:1  cluster:1 having tags:[SATA]
2014-12-30 11:47:05,332 DEBUG 
(Job-Executor-11:ctx-c97ee1d1 ctx-9293a9d0) Found pools matching tags: 
[Pool[2|NetworkFilesystem], Pool[3|NetworkFilesystem]]
2014-12-30 11:47:05,336 DEBUG 
(Job-Executor-11:ctx-c97ee1d1 ctx-9293a9d0) Adding pool 
Pool[1|NetworkFilesystem] to avoid set since it did not match tags
2014-12-30 11:47:05,337 DEBUG 
(Job-Executor-11:ctx-c97ee1d1 ctx-9293a9d0) Removing pool 
Pool[2|NetworkFilesystem] from avoid set, must have been inserted when 
searching for another disk's tag
2014-12-30 11:47:05,337 DEBUG 
(Job-Executor-11:ctx-c97ee1d1 ctx-9293a9d0) Removing pool 
Pool[3|NetworkFilesystem] from avoid set, must have been inserted when 
searching for another disk's tag
2014-12-30 11:47:05,339 DEBUG [o.a.c.s.a.AbstractStoragePoolAllocator] 
(Job-Executor-11:ctx-c97ee1d1 ctx-9293a9d0) Checking if storage pool is 
suitable, name: null ,poolId: 2
2014-12-30 11:47:05,348 DEBUG [c.c.s.StorageManagerImpl] 
(Job-Executor-11:ctx-c97ee1d1 ctx-9293a9d0) Checking pool 2 for storage, 
totalSize: 1869169819648, usedBytes: 919377674240, usedPct: 
0.49186417658569737, disable threshold: 0.85
2014-12-30 11:47:05,355 DEBUG [c.c.s.StorageManagerImpl] 
(Job-Executor-11:ctx-c97ee1d1 ctx-9293a9d0) Checking pool: 2 for volume 
allocation [Vol[435|vm=null|DATADISK]], maxSize : 3738339639296, 
totalAllocatedSize : 1551179448320, askingSize : 21474836480, allocated 
disable threshold: 0.85
2014-12-30 11:47:05,356 DEBUG 
(Job-Executor-11:ctx-c97ee1d1 ctx-9293a9d0) 
ClusterScopeStoragePoolAllocator returning 1 suitable storage pools
2014-12-30 11:47:05,358 DEBUG [o.a.c.e.o.VolumeOrchestrator] 
(Job-Executor-11:ctx-c97ee1d1 ctx-9293a9d0) Trying to create on
2014-12-30 11:47:06,798 DEBUG 
(Job-Executor-11:ctx-c97ee1d1 ctx-9293a9d0) Creating volume:

On 2014.12.18. 14:19, Mārtiņš Jakubovičs wrote:
> Hello,
> I want to understand, how work volume scheduler in CloudStack.
> We got two SR:
> First SR:
> Disk Total    1.70 TB
> Disk Allocated    1.31 TB
> Second SR:
> Disk Total    1.83 TB
> Disk Allocated    57.09 GB
> Why on first SR there are much more created volumes, than on second 
> one? When I create new volume it creates in first SR anyway. Why 
> volume is not created on SR which have much more free space?
> How I can edit scheduling options?
> Both SR got same "Storage Tags ".
> ACS 4.3.1
> storage.overprovisioning.factor 2.0
> XenServer 6.2
> Best regards,
> Martins

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