From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from firstgate.proxmox.com (firstgate.proxmox.com [212.224.123.68]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by lists.proxmox.com (Postfix) with UTF8SMTPS id 6D8257223B for ; Mon, 12 Apr 2021 08:49:23 +0200 (CEST) Received: from firstgate.proxmox.com (localhost [127.0.0.1]) by firstgate.proxmox.com (Proxmox) with UTF8SMTP id 613001A56F for ; Mon, 12 Apr 2021 08:48:53 +0200 (CEST) Received: from proxmox-new.maurer-it.com (proxmox-new.maurer-it.com [212.186.127.180]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by firstgate.proxmox.com (Proxmox) with UTF8SMTPS id E1F1A1A551 for ; Mon, 12 Apr 2021 08:48:49 +0200 (CEST) Received: from proxmox-new.maurer-it.com (localhost.localdomain [127.0.0.1]) by proxmox-new.maurer-it.com (Proxmox) with UTF8SMTP id A833F42014; Mon, 12 Apr 2021 08:48:49 +0200 (CEST) Message-ID: <2509fa63-a5b2-658a-610f-0497202d2f6f@proxmox.com> Date: Mon, 12 Apr 2021 08:48:48 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:88.0) Gecko/20100101 Thunderbird/88.0 Content-Language: en-US To: Proxmox VE user list , Leandro Roggerone , PVE User List References: From: Dominik Csapak In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-SPAM-LEVEL: Spam detection results: 0 AWL 0.167 Adjusted score from AWL reputation of From: address KAM_DMARC_STATUS 0.01 Test Rule for DKIM or SPF Failure with Strict Alignment NICE_REPLY_A -0.001 Looks like a legit reply (A) RCVD_IN_DNSWL_MED -2.3 Sender listed at https://www.dnswl.org/, medium trust SPF_HELO_NONE 0.001 SPF: HELO does not publish an SPF Record SPF_PASS -0.001 SPF: sender matches SPF record Subject: Re: [PVE-User] LVM question X-BeenThere: pve-user@lists.proxmox.com X-Mailman-Version: 2.1.29 Precedence: list List-Id: Proxmox VE user list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 12 Apr 2021 06:49:23 -0000 Hi, On 4/9/21 19:19, Leandro Roggerone wrote: > Hi guys , after install a new storage to my box , had to create lvm-thin. > Im not very good with lvm , after reading some docs , and links like: > https://forum.proxmox.com/threads/how-to-create-an-lvm-thinpool-and-vz-directory-on-the-same-disk.62901/ > > I got a working solution but have also some questions about it. > This is what I did: > > wipefs -a /dev/sdb > > sgdisk -N 1 /dev/sdb > > pvcreate --metadatasize 1024M -y -ff /dev/sdb1 > > vgcreate --metadatasize 1024M proxvg /dev/sdb1 > > lvcreate -l 100%FREE --poolmetadatasize 1024M --chunksize 256 -T -n > proxthin proxvg > > lvcreate -n proxvz -V 1.1T proxvg/proxthin > > mkfs.ext4 /dev/proxvg/proxvz > > mkdir /media/vz > > echo '/dev/proxvg/proxvz /media/vz ext4 defaults,errors=remount-ro 0 2' >> > /etc/fstab > > mount -a > > > And have following result: > > > root@pve2:~# lvs > LV VG Attr LSize Pool Origin Data% Meta% > Move Log Cpy%Sync Convert > proxthin proxvg twi-aotz-- 1.63t 22.03 6.34 > > proxvz proxvg Vwi-aotz-- 1.10t proxthin 1.67 > root@pve2:~# lvdisplay > --- Logical volume --- > LV Name proxthin > VG Name proxvg > LV UUID 4cEIr9-3ZVQ-vsy1-q9ZX-GsaD-7oq0-pZixsX > LV Write Access read/write > LV Creation host, time pve2, 2021-04-01 13:09:41 -0300 > LV Pool metadata proxthin_tmeta > LV Pool data proxthin_tdata > LV Status available > # open 3 > LV Size 1.63 TiB > Allocated pool data 22.03% > Allocated metadata 6.34% > Current LE 428451 > Segments 1 > Allocation inherit > Read ahead sectors auto > - currently set to 256 > Block device 253:2 > > --- Logical volume --- > LV Path /dev/proxvg/proxvz > LV Name proxvz > VG Name proxvg > LV UUID huzpPT-g0Gd-3Jwb-2ydz-InHh-73vN-Jnc5TR > LV Write Access read/write > LV Creation host, time pve2, 2021-04-01 13:10:12 -0300 > LV Pool name proxthin > LV Status available > # open 1 > LV Size 1.10 TiB > Mapped size 1.67% > Current LE 288359 > Segments 1 > Allocation inherit > Read ahead sectors auto > - currently set to 256 > Block device 253:4 > > > Have following comments: > > I can create VMs on proxthin partition so it is ok. > > I can create backup on proxvz partition so it is ok. Looks OK imho. > > What im concerned about is: > > Physic storage space is about 1.8TG , how is it possible to create a 1.6 > and 1.1T volumnes inside ? LVM Thin is 'thin-provisioned' it only uses space when it is really written. > It can be a problem in the future ? yes, if you do not monitor your real usage, if the thinpool runs full, you can lose data. > I was thinking about reduce proxthin partition to 600Gb aprox , so it make > same sense 1.1T + 600G aprox 1.8 T > But there is no LV Path on proxthin partition so I can unmount and the > reduce. > So .. > What im missing here ? do I need to reduce proxthin partition ( I do need > the 1.1T partition to backup). the LV 'proxvz' is inside the thinpool 'proxthin' so as long as you never allocate more that ~500GiB of vm/ct volumes, it should be fine. alos, on allocation, the thinpool will print warnings if the allocated lvs are bigger than the space available hope this helps > Hope to be clear about this guys. > Any comment would be wellcome. > Leandro. > _______________________________________________ > pve-user mailing list > pve-user@lists.proxmox.com > https://lists.proxmox.com/cgi-bin/mailman/listinfo/pve-user > >