similar to: ZFS and thin provisioning

Not sure where to put this but I am cc''ing the ZFS - discussion board. I was successfull in creating iscsi shares using ZFS set shareiscsi=on with 2 thin provisioned partitions of 1TB each (zfs create -s -V 1tb idrive/d1). Access to the shares with an iscsi initiator was successful, all was smooth, until the reboot. Upon reboot, the console reports the following errors. WARNING:

Hello, sorry if these questions have been answered before but please excuse me, I''m new to xVM :) Anyway I have been using Linux/Xen for quite a while and am very familiar with it. I am very interesting in changing to OpenSolaris/xVM for the primary reason of being able to easily leverage the ZFS filesystem and thin provisioning for better storage efficiency. 1) Is this ZFS thin

I know that lvm supports thin provisioning, and I think I have a pretty good grasp on how that works. Does libvirt support lvm thin provisioning and thin snapshots? I know that in order to set up lvm thin provisioning by hand, I have to create a thin-provisioning pool within the volume group, and then thin-provisioned logical volumes and thin-provisioned snapshots can be created within that

Hello, On 2013-11-22 21:46, Michael Mol wrote: > I know that lvm supports thin provisioning, and I think I have a pretty > good grasp on how that works. Does libvirt support lvm thin > provisioning and thin snapshots? libvirt does not support storage pools containing thin pools. Since commit 4132dede0652b7f0cc83868fd454423310bc1a9c

On Tue, 03 Dec 2013 18:13:08 +0100 Oliver Brakmann <oliver.brakmann@posteo.de> wrote: > Hello, > > On 2013-11-22 21:46, Michael Mol wrote: > > I know that lvm supports thin provisioning, and I think I have a > > pretty good grasp on how that works. Does libvirt support lvm thin > > provisioning and thin snapshots? > > libvirt does not support storage pools

Short question: I''m curious as to how ZFS manages space (free and used) and how its usage interacts with thin provisioning provided by HDS arrays. Is there any effort to minimize the number of provisioned disk blocks that get writes so as to not negate any space benefits that thin provisioning may give? Background & more detailed questions: In Jeff Bonwick''s blog[1], he

Support for thin reclamation depends on the SCSI "WRITE SAME" command; see this draft of a document from T10: http://www.t10.org/ftp/t10/document.05/05-270r0.pdf. I spent some time searching the source code for support for "WRITE SAME", but I wasn''t able to find much. I assume that if it was supported, it would be listed in this header file:

I've been running into some problems with LVM thin provisioning in CentOS 6.3. Some of these I have reported to RH Bugzilla (e.g. https://bugzilla.redhat.com/show_bug.cgi?id=883629). The upshot seems to be that in RHEL 6.3 the features are "preview" but in 6.4 they are "full featured/robust" (hopefully) and many of the bugs are fixed. This raises the following

Hello all! This is my first mail here, so if I make some obvious mistakes, I apologise in advance. I just tried XCP in the last days and I must say that besides the standard inconveniences, it''s really cool and nice. I''m unclear about templates though, does it use standard xencenter templates? If yes, how can I install those templates that I find are missing? Do I need a

On 12/03/2013 12:37 PM, Michael Mol wrote: > A pity. Thin provisioning would be (as I see it) the first step to > whole-VM snapshots as found in systems like VMWare ESX. I'd love to be > able to pull that off using Linux/QEMU/KVM. Or at least be able to > snapshot a running VM's disk to be able to pull backups off the > snapshot without interrupting service in the VM

On Tue, 03 Dec 2013 13:23:37 -0700 Eric Blake <eblake@redhat.com> wrote: > On 12/03/2013 12:37 PM, Michael Mol wrote: > > > A pity. Thin provisioning would be (as I see it) the first step to > > whole-VM snapshots as found in systems like VMWare ESX. I'd love to > > be able to pull that off using Linux/QEMU/KVM. Or at least be able > > to snapshot a

Gents, We want to understand the mechanism of zfs a bit better. Q: what is the design/algorithm of zfs in terms of reclaiming unused blocks? Q: what criteria is there for zfs to start reclaiming blocks Issue at hand is an LDOM or zone running in a virtual (thin-provisioned) disk on a NFS server and a zpool inside that vdisk. This vdisk tends to grow in size even if the user writes and deletes

Hi, I've noticed huge write amplification problem with thinly provisioned logical volumes and I wondered if anyone can explain why it happens and if and how can be fixed. The behavior is the same on Centos 6.8 and Centos 7.2. I have a NVME card (Intel DC P3600 -2 TB) on which I create a thinly provisioned logical volume: pvcreate /dev/nvme0n1 vgcreate vgg /dev/nvme0n1 lvcreate

Hullo everybody how can I create File-based thin-provisioned VHD on a Filesystem for VM images for a local non-shared Filesystem (EXT type SR), for with the configurations i have dont allow me make a 4th partition Below are my configurations. [root@virtualintranet /]# fdisk -l Disk /dev/sda: 1998.2 GB, 1998233534464 bytes 255 heads, 63 sectors/track, 242938 cylinders Units = cylinders of

Hi all, Is it possible to do this? I need to create some sparse volumes/block virtual devices to be served via iscsi target. Thanks

Hi there. I'm trying to use thin provisionned LVM for som eguests, and I'm having a problem. Until now, I use LVM pool with success. Here's my pool definition: <pool type='logical'> <name>data</name> <uuid>7f18e030-9d2d-805e-c65f-d12d0681b0a9</uuid> <capacity unit='bytes'>0</capacity> <allocation

Hi folks, I''m having trouble getting gems to install rails. It just keeps asking me which version of thin I want to install. Until I choose skip or cancel, in which case I''m told that something has gone wrong. Any advice? Thanks kindly, Tommy PS: Gems is 0.94. --------------------------------------------------------------------- tommy@tommy-laptop:~/www/blog$ sudo gem

Please don't use lvm thin for vm. In our hosting in Russia we have 100-150 vps on each node with lvm thin pool on ssd and have locks, slowdowns and other bad things because of COW. After we switching to qcow2 files on plain ssd ext4 fs and happy =). 2017-11-04 23:21 GMT+03:00 Jan Hutař <jhutar@redhat.com>: > Hello, > as usual, I'm few years behind trends so I have learned

Do you have some comparasion of IO performance on thin pool vs. qcow2 file on fs? In my case each VM would have its own thin volume. I just want to overcommit disk-space. Regards, Jan On 2017-11-07 13:16 +0300, Vasiliy Tolstov wrote: >Please don't use lvm thin for vm. In our hosting in Russia we have >100-150 vps on each node with lvm thin pool on ssd and have locks, >slowdowns

It''s not about scalability on a huge site, but the lowest possible latency for a very small app. I have a little app with Thin and Sinatra. My app generates the page in about 50ms. After getting the browser request, thin waits 50ms and then it takes 300ms sending the page, to Chromium at localhost. (It takes 300ms to send a static a.html with the word "test" on it, too, so it