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vmware disk consolidation

Posted on 2014-03-27
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Last Modified: 2016-10-27
foudn one of my vms had loads of file and so ran a consolidation of disks.

getting:

This virtual machine has more than 100 redo logs in a single branch of its snapshot tree. Deleting some of the snapshots or consolidating the redo logs will improve performance. The maximum number of redo logs supported is 255.
This virtual machine has more than 100 redo logs in a single branch of its snapshot tree. Deleting some of the snapshots or consolidating the redo logs will improve performance. The maximum number of redo logs supported is 255.
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Question by:CHI-LTD
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gheist earned 200 total points
ID: 39958398
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by:CHI-LTD
ID: 39958405
i tried that last night and got the error.  files remain..
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by:gheist
ID: 39958417
Try in desktop client - snapshot manager/delete all, it is much older and more solid button than "consolidate"
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by:CHI-LTD
ID: 39958428
i think i would have done, but there aren't any option to do this.  not snapshots in here.  but the client shows consolidation needs to be run..
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by:gheist
gheist earned 200 total points
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by:CHI-LTD
ID: 39958457
okay, thought so.
i can see the files listed in the gui, but not showing in ssh...
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by:CHI-LTD
ID: 39958473
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by:Andrew Hancock (VMware vExpert / EE MVE^2)
Andrew Hancock (VMware vExpert / EE MVE^2) earned 300 total points
ID: 39958506
This is often the case with Consolidation.

Try the following:-

1. Create a new Snapshot
2. Wait 60 seconds
3. Delete ALL (the snapshots).

Check using SSH or Datastore Browser, do snapshots still exist?

see my EE Article

HOW TO: VMware Snapshots :- Be Patient
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by:gheist
ID: 39958508
Yes, delete tmp files when guest is off and consolidated and snapshots removed. You can use datastore browser too to delete them
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by:CHI-LTD
ID: 39958522
so power the vm off first.
then snapshot through Vmware (not 3rd party tool)
then delete it (which will delete the old ones too?)

thanks
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ID: 39958527
That's correct, it does not matter, whether the VM is on or off.

Yes, DELETE ALL, will remove the entire chain of snapshots.

try it.

Please report back if successful.
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by:CHI-LTD
ID: 39958531
but i currently don't see any under the snapshot manage in the gui with the vm on..
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ID: 39958562
That's normal, that snapshots could be missing from Snapshot Manager.

Can you check if your VM is running on a Snapshot, see my Article above to check.
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by:CHI-LTD
ID: 39958570
looks like the vm is running on the shanshot./
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by:CHI-LTD
ID: 39958573
some of my other vms have some odd vmdk names, but must be running on the correct disk and not snapshot as only one there...
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by:gheist
ID: 39958578
You have to power it off for service. While it is running it may continue to add journals.
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by:Andrew Hancock (VMware vExpert / EE MVE^2)
Andrew Hancock (VMware vExpert / EE MVE^2) earned 300 total points
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if you have a VM disk called -0000x.vmdk (where x is a number)

it's running on a snapshot.
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by:gheist
ID: 39958606
100 journals is inconsistency that has to be fixed. Making and deleting snapshot on powered off VM is the easiest try.
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by:CHI-LTD
ID: 39958614
ok will try that first.
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by:gheist
ID: 39958639
If visual solution fails delete journals while machine is still off (or safer -  rename tmp directory to qwerty)
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by:CHI-LTD
ID: 39958652
can you explain?
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ID: 39958669
If consolidation is not working, or Deleting snapshots is not working.

you will need to

1. CLONE the existing Virtual Machine disk.

or

2. Use VMware Converter to create a V2V.
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by:CHI-LTD
ID: 39958713
So:

so power the vm off first.
consolidate

if not worked:
then snapshot through Vmware (not 3rd party tool)
then delete it (which will delete the old ones too?)

if that fails:
clone it
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ID: 39958721
That's a good Action Plan.
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by:CHI-LTD
ID: 39959403
forgot to add that we had a power cut and our vms shutdown and restarted..
i have 2x vms on 2x different hosts removing snapshot since 11am and 8am today
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by:CHI-LTD
ID: 39959624
saying unable to access file since it is locked.

going to snapshot it then delete & consolidate.
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by:CHI-LTD
ID: 39959680
didnt work either.  downed my acronis appliance which has the vm disk attached/locked.

its consolidating now..
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by:gheist
ID: 39959916
Cmon you doid not see it before that your acronisappliance is locking snapshots?
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by:CHI-LTD
ID: 39960107
nope!
really thinking if replicating the vms is worthwhile with the issues we have with it!!?

1x vm colsolidating
2x vms removing snapshot - still...
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by:gheist
ID: 39960133
1x move machine to different storage in different format.
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by:CHI-LTD
ID: 39960151
??
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You need to investigate WHY, these Snapshots are being left.
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by:CHI-LTD
ID: 39960302
sure.  its happened before and we think its a conflict with other backup software and/or the replicas taking too long and clashing somehow and not removing the old files.
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by:Andrew Hancock (VMware vExpert / EE MVE^2)
Andrew Hancock (VMware vExpert / EE MVE^2) earned 300 total points
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I've seen you post many issues with your Backup Solutions.

Its not really recommended to run two different backup solutions that use VMware Snapshots.

SLOW storage or datastores are also causes of leftover snapshots.
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