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Questions tagged [thin-provisioning]

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How to remap deleted LV on thin provisioning volume

I have a thin-provisioning storage, on top of which I created an LVM disk. I didn't know that I had to set issue_discards = 1 in lvm.conf in order to have my disks actually deleted when I run lvremove....
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Is that possible to get thin provisionning output using dd over ssh?

From : https://pve.proxmox.com/wiki/Migration_of_servers_to_Proxmox_VE dd if=/dev/sda | ssh root@proxmox dd of=/var/lib/vz/images/101/vm-101-disk-1.raw produce a raw image from original server and ...
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0answers
49 views

fstrim is not functional after migrate to vmfs6 without reboot

I have Vmware esxi 6.5. Now I migrated some thin provisionied VMs to VMFS6. When I call fstrim /I can except that vmdk file will smaller, but without error in console - vmdk is not smaller. I must ...
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1answer
71 views

On ESX, does a Ubuntu VM re-use free space in the VM, before expanding the virtual disk?

I have a thin-provisioned Ubuntu 18 VM on ESX 6 with one virtual disk that is using almost all the underlying physical disk (I have a new 4TB disk ordered to move to shortly). The VM filesystem is ...
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1answer
279 views

Disable thin provisioning (sparse files) in proxmox

I'm using Proxmox Virtual Environment to run few virtual machines. I use raw storage format and I need that the disk is fully pre allocated when created so it does not grow. The proxmox says that ...
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1answer
364 views

How do you run lvm's thin_dump or thin_check? metadata can't be live, but then what option do you use?

I want to run thin_dump, and thin_check. They say they cannot be ran on live metadata. That's fine by me. The problem is I don't know how to make the metadata not live, while still being able to ...
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2answers
122 views

Shrinking overprovisioned thin disks

We have a VCenter with some data storages, one of them is 10 TB. The issue is that the former sysadmins created many VM's with thin provisioned disks of 8 TB. Right now, the provisioned storage is ...
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1answer
627 views

VDO/Virtual Disk Optimizer limitations in storage stack

Well, RHEL 7.5 released with important add-on, VDO, which basically adds thin provisioned compressed and de-duplicated volumes, which is great and we'll get these benefits with derivatives and other ...
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1answer
305 views

Reserving free space in LVM thin pool for admin VM

My goal is a default configuration for LVM thin-provisioning that is flexible enough to reserve a safety margin for one admin VM LV (VolA) versus user LVs (VolU1, VolU2, VolU3 ...) even if various ...
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1answer
74 views

OpenShift / Docker thin provisioning

I've been looking at OpenShift Origin documentation and tutorials for the past two days and I have a few questions if you guys can help me; For Docker’s thin provisioning configuration for production ...
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1answer
294 views

Why does metadata cost double space when creating thin pool?

Background I have a vg with 32G free space on Centos6.9. When I use lvcreate -T vg/pool -L 30G --poolmetadatasize 2G to create a thin pool, it says insufficient free disk space. When I reduce the ...
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1answer
326 views

How to find whether the disk is thin provisioned or not?

I have mapped IScsi volumes into my windows 2016 server. I have created disk out of them. Now i need to find whether the disk is thin provisioned or not. I am trying with below cmdlets Get-Disk ...
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1answer
262 views

VM with thin hard drive how to reduce disk size after deleting files

I have a VM (ws 2012) with 1.5 TB thin provisioning HDD and it was nearly full (1.47 TB used space) i moved these files to 4X400 new VMD and now i have only 120 GB used space in the 1.5 TB HDD i ...
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1answer
1k views

LVM: Logical volumes mapped size much bigger than filesystem used disk space

In Proxmox we use LVM to create discs (logical volumes) for our VMs (LVM thin provisioning). Recently we found out our volume group is almost full even when all VM discs are almost empty. Problem ...
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2answers
2k views

Impact of using thinpool on LVM performance

Using LVM, what are the performance implications of using thinpool on an logical volume?
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0answers
434 views

How to enable space reclamation from KVM guest to ZFS zvol iSCSI target?

I have a ZFS volume "tank/kvm/webhosting", exposed through iSCSI (using tgt) to KVM guest. <disk type='block' device='disk'> <driver name='qemu' type='raw' cache='none' io='native' ...
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0answers
341 views

LVM volume has a data percent bigger than 100%

One of my LVM volume is shown to have 372.6% data. How could this happen? Note the volume have been re-sized down from a bigger size, but the file system seems working fine. It actually impacts the ...
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2answers
2k views

is it possible to convert dataset to sparse volume (thin provisioning)?

I've created ZFS datasets and installed virtual servers into them. Suddenly my ZFS volume free space is gone, but not all space is used in each dataset. I want to introduce thin provisioning (use ZFS ...
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1answer
79 views

Server 2012 R2 - Features on Demand - role not actually being removed

This is for learning purposes: I'm running a Server r2 machine and I'm trying to remove feature WINS. I run uninstall-windowsfeature WINS -restart -remove, I then restart, and then run get-...
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0answers
400 views

Is it possible to extend the data device of an Thin Provision pool setted by device mapper?

TL;DR : How can I extend the Thin-Pool if I'm not using LVM but Device Mapper itself directly? Detailed version: As far as I know, when we create a thin-pool by dmsetup, we can set a ...
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113 views

The tool thin_delta segfaulting

I am trying to run thin_delta and it is segfaulting. OS : CentOS 7. Cmd: /usr/sbin/pdata_tools thin_delta --verbose --thin1 1 --thin2 2 /dev/mapper/vg_root_thin_pool_tmeta I have a thin volume and ...
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0answers
949 views

Figure out the used space on the snapshot thin volume

I have the following lvm configuration. Hard Disk: /dev/sdb (Size 10 GB) VG: vg_root on /dev/sdb THIN_POOL thin_pool occupying the whole physical extent lvcreate -y --extents 100%free --thin vg_root/...
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2answers
736 views

vCenter Thin Provisioned disk usage calculations

I'm managing a number of Thin-Provisioned VMs in vCenter 5.1.0. Each contains one virtual Harddisk. We run a pretty tight ship in terms of allocating storage, so the difference between 1 or 2 GBs is ...
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2answers
2k views

How do I make KVM images with LVM partitioning be thinly provisioned with a max growth size?

BACKGROUND: Up to now, I have been provisioning VMs as follows: Create template/gold VM: Create new CentOS 6.6 VM with raw 200GB disk (1 .xml file, 1 .img file) LVM partitioning with: /boot, swap, ...
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0answers
2k views

Hyper-V 2012 R2: VM thinks disks are thin-provisioned

We are using Hyper-V 2012 R2 on a Windows Server 2012 R2 host. We have several VMs with multiple volumes (VHDX) which we initially set up as thin-provisioned (dynamically expanding). Later on, we ...
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0answers
496 views

Efficiently get file deltas for backups

With many large Xen sparse image files that have to be backed up, I'm looking for a way to do this efficiently both in terms of disk space (saving space with a differential tool like duplicity, bup, ...
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3answers
352 views

ESX SAN overbooked, what happens if storage limit reached?

In ESX you can easily overbook the available storage with the Virtual Guests. What happens if a overbooked SAN reaches its capacity limit? Its not an actual problem i'm faced with, we just had the ...
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2answers
16k views

VMWare ESXi 5.5, thin provision still allocates full amount of space on disk

I see a lot of questions and answers surrounding thin provisioning on VMWare ESXi but not exactly what I'm encountering. I am creating a brand new VM and specifying a 100GB thin provisioned hard disk....
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2answers
4k views

How can I safely use storage thin provisioning?

I have storage that allows me to thin provision my volumes presented to the clients. Is this safe? What are the best practices?
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1answer
938 views

Why is my vSphere disk now thick provisioned?

I have a vSphere 5.0 VM that was created with entirely thin-provisioned disks (I don't have any other options when creating them). A year later, one of the disks is now no longer thin provisioned but ...
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4answers
3k views

taring vmdk files does not preserve thinness

we have NFS storage, where we store our backups.. we manipulate with them from linux machine where the nfs is also mounted.. So, for example thin provisioned thin.vmdk disk is on linux seen as thin....
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2answers
1k views

How to reclaim disk space on ESXI 5.0 [duplicate]

I have a DELL R710 with ESXI 5.0. I've created a VM with 100GB thin provision. I deleted most of the data. Is it possible to shrink the VM folder on the ESXI? thanks! Dotan.
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1answer
1k views

should I use thick or thin provisioning

I have a linux vm with 40GB Thick provision Eager Zeroed. when I login to my ESXI Server I can see that the folder of the VM is about 40GB. I've created a 10GB file on the linux VM machine. I see ...
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1answer
23k views

How do I expand a VMware Thick Provisioned Eager Zeroed drive?

I have a drive that is VMWare Thick Provisioned with a format of Thick Provisioned Eager Zero. I need to expand this drive by 10Gb, but unlike Thick Provisioned Lazy zero, I can't expand that drive ...
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4answers
2k views

How to clone LVM thin provisioning volume?

I googled many times but couldn't find an answer. What I want is cloning an LVM thin provisioning volume to another thin volume. For now I know dd can clone a thin volume as following: dd if=/dev/...
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4answers
18k views

Disk shrink does not work on ESXi guests

EHLO everyone! My first post on the StackOverflow network :) We're running some ESXi 5.0/vCenter infrastructure to host mainly Debian 6/amd64 guest systems with ext3 partitions and open-vm-tools ...
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2answers
1k views

Windows 2008: re-use of deleted blocks on virtual “thin” disks

We use a StarWind SAN which has the concept of thin-provisioned disks that grow as needed. You can allocate a 4TB drive but it starts off tiny and grows as blocks are written to the virtual disk (via ...
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5answers
77k views

Move VMware ESXi VM to new datastore - preserve thin-provisioning

I'm looking for a good solution to a VMware ESXi environment issue where there's no vCenter available. What's the best way to move a VM from one datastore to another on a single ESXi host, while ...
5
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3answers
3k views

In Linux, how can I create thin-provisioned file so it can be mounted and a filesystem created on it?

I am building a system that gives users certain amounts of disk space. The way I am doing it is: create a file with dd create an ext4 filesystem inside the file mount the file and tell the user ...
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4answers
861 views

Drobo Thin Provisioning: What happens when you run out of space?

I'm thinking about getting a Drobo S to add some storage on a Windows Server 2008 R2 box. The Drobo offers thin provisioning. While I will only have 4.5TB of space initially, I'd like to use thin ...
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4answers
3k views

Advantages of thick provisioning of storage over thin provisioning with virtual machines

I typically use thin-provisioning of storage space when building VMs: it provides a lot of flexibility, and seems to be faster to build. The only potential definite advantage I can see is to ensure ...
6
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4answers
7k views

Moving thin provisioned vmdk ESXi 5

I am doing an educational project where I have to setup 3 (or more) Windows 2008 R2 servers on a machine running ESXi. I wanted to give myself a head start so I began setting an ESXi environment ...