similar to: Seeking pointers to info about LVM migration and performance

Hi All. Looking for some guidance/experience with LVM and pvmove. I have a LUN/PV being presented from a iscsi SAN. The LUN/PV is presented to 5 servers as a shared VG they all have LV's they use for data, they are all connected via iSCSI. As the SAN I am using is being replaced I need to move onto a new unit. My migration strategy at this time is to 1. Present a new LUN from the new SAN

So I've learned a valuable RAID 0 lesson, and it fortunately was not a major catastrophy. I got lucky, and had a workable-enough backup on tape to make the user who needed some data happy. Now, from the OS side, LVM is an option. Say the RAID controller only allows hardware striping or mirroring for logical volumes, but I want to use more than two disks, and I don't want the RAID 0

Our sysadmin was doing midnight work on moving some hardware to new power outlets. We'd recently done a CentOS 5.3 install on one of those machines and then "yum install" with the centosplus kernel and some rpmforge packages. It had been up and running fine for at least two weeks in that configuration. He sent this message: On reboot the root file system seems to have reverted to

During Gluster Summit, we discussed gluster volumes as storage for VM images - feedback on the usecase and upcoming features that may benefit this usecase. Some of the points discussed * Need to ensure there are no issues when expanding a gluster volume when sharding is turned on. * Throttling feature for self-heal, rebalance process could be useful for this usecase * Erasure coded volumes with

----- Original Message ----- > From: "Sahina Bose" <sabose at redhat.com> > To: gluster-users at gluster.org > Cc: "Gluster Devel" <gluster-devel at gluster.org> > Sent: Tuesday, October 31, 2017 11:46:57 AM > Subject: [Gluster-users] BoF - Gluster for VM store use case > > During Gluster Summit, we discussed gluster volumes as storage for VM

Simplify how we handle lvm.conf.

On 10/31/2017 08:36 PM, Ben Turner wrote: >> * Erasure coded volumes with sharding - seen as a good fit for VM disk >> storage > I am working on this with a customer, we have been able to do 400-500 MB / sec writes! Normally things max out at ~150-250. The trick is to use multiple files, create the lvm stack and use native LVM striping. We have found that 4-6 files seems to give

Welcome, I''ve been using btrfs for over a 3 months to store my personal data on my NAS server. Almost all interactions with files on the server are done using unison synchronizer. After another use of bedup (https://github.com/g2p/bedup) on my btrfs volume I experienced huge perfomance loss with synchronization. It now takes over 3 hours what have taken only 15 minutes! File

Hi there, I have a system with the following: # fdisk -l Disk /dev/sda: 80.0 GB, 80000000000 bytes 255 heads, 63 sectors/track, 9726 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Device Boot Start End Blocks Id System /dev/sda1 * 1 13 104391 83 Linux /dev/sda2 14 9471 75971385 83 Linux /dev/sda3

We have a CentOS 3 server with about 300GB of data on an ext2 filesystem that we need to mirror onto a new drive, which we're then going to pull out and put into a second server. A straight disk-to-disk copy (with rsync, tar, or "cp -a" doesn't much matter) manages about 75MB per minute, which would take almost three days, and the system gets very sluggish while such a copy is

Hi All, I have what I believe to be a pretty basic LVM & RAID setup on my CentOS 5 machine: Raid Partitions: /dev/sda1,sdb1 /dev/sda2,sdb2 /dev/sda3,sdb3 During the install I created a RAID 1 volume md0 out of sda1,sdb1 for the boot partition and then added sda2,sdb2 to a separate RAID 1 volume as well (md1). I then setup md1 as a LVM physical volume for volume group 'system'. I

I just installed Centos 5 for my notebook (HP compaq nc4010) on a separate drive (than this one that has Centos 4.5). When I first booted after all the setup, X did not start. hmm. Rebooted, and X came up fine. I did a bunch of customizing and upgraded the kernel Rebooted, X did not start. Rebooted X started fine. I checked some things out then tried the Suspend feature. Not

Graphic installer doesn't like my graphics card, so I am using the text installer. I have two physical disks in my system. When I get to the "partitioning type" page, I choose "remove all partitions on selected drives [etc]" and put an asterisk next to sda, no asterisk next to sdb. I want to use sdb as a separate partition, no LVM, I figure I can set it up after

Dear Chris, James, Valeri and all, Sorry to have not responded as I'm still on struggling with the recovery with no success. I've been trying to set up a new system with the exact same scenario (4 2TB hard drives and remove the 3rd one afterwards). I still cannot recover. We did have a backup system but it went bad for a while and we did not have replacement on time until this

Dear CentOS-Community, we have a server with four hard drives that are configured as raid10 (/dev/sda). Now, /home and /root are almost full. Therefore, we decided to buy four additional hard drives that should configured also as raid 10 (/dev/sdb). I want to use LVM to extend disk space for root and home. My (successful) test procedure in a virtual environment looks like this: 1. devide

Dear All, I am in desperate need for LVM data rescue for my server. I have an VG call vg_hosting consisting of 4 PVs each contained in a separate hard drive (/dev/sda1, /dev/sdb1, /dev/sdc1, and /dev/sdd1). And this LV: lv_home was created to use all the space of the 4 PVs. Right now, the third hard drive is damaged; and therefore the third PV (/dev/sdc1) cannot be accessed anymore. I would like

Hi all,? I have a CentOS 4.5 server running on a workstation mainboard (PCI Slots only).? We have now one 200 Gigs IDE disk dedicated for e-mail server storage.? We use Communigate Pro and the server has 45 Outlook clients with the MAPI connector (All mailboxes on the server).? When a user opens Outlook, a refresh of the local cache is performed for his data.? There is a big "Public"

CentOS Community, I have a dedicated server with 4 hard drives in a RAID 10 software configuration running LVM. My OS is CentOS 6.2. Earlier today, I rebooted my system and my system did not come back online. I opened a ticket with my datacenter who informed me that one of my hard drives is no longer recognized by the bios and has failed. I was told that an OS reinstall was needed. I

I am planning to increase the disk space on my desktop system. It is running CentOS 5.9 w/XEN. I have two 160Gig 2.5" laptop (2.5") SATA drives in two slots of a 4-slot hot swap bay configured like this: Disk /dev/sda: 160.0 GB, 160041885696 bytes 255 heads, 63 sectors/track, 19457 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Device Boot Start End

Apologies if I should ask this elsewhere, google search is not helping. I've got a CentOS5 server with lighttpd installed from EPEL, configured for https only (no connections on ports other than 443). I have the latest security updates for openssl, etc. However, when connecting to the server with recent Chrome from Windows or Android, I get the "Your connection is not private"