I would like also to mention that when it comes to LVM, it makes much more easier to manage such systems especially with FCP involved. Imagine that you break your multipath config for example and you lose your “mpath” names. If you have LVM, you can still boot. LVM will just scan all your paths, pick the first (or last - can’t remember) available with a proper label and use that to bring up the vg and logical volumes. Without LVM, you will have to a lot of work to get system online again. There were few others scenarios which I can't remember now, when LVM saved me big time or made things a lot easier. Gregory Powiedziuk
> On Oct 6, 2015, at 3:34 AM, van Sleeuwen, Berry <berry.vansleeu...@atos.net> > wrote: > > Actually, those were just examples. The Samba and TSM guests have the biggest > LVM filesystems. We have a quite a few linux guests, most of them use LVM. > Ranging from a small webserver to a couple of oracle database machines with > LVM's up to 40G. > > I don’t think it matters if we are talking zVM guests or native linux > machines. The usage of LVM depends on what storage is available. Mainframe > DASD typically doesn't have the large disksizes so the smaller disks require > LVM or any other solution that glues disk together. But even when the storage > solution has the required sizes available there can be other reasons for > using LVM. We use LVM primarily for two reasons. First of all to glue smaller > disks together and secondly to spread IO onto multiple disks. > > We use LVM only for user filesystems. The system data remains on non-LVM > disks. Most of the user data is located in /srv that is located in an LVM. > > Met vriendelijke groet/With kind regards/Mit freundlichen Grüßen, > Berry van Sleeuwen > > -----Original Message----- > From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of Sergey > Korzhevsky > Sent: Monday, October 05, 2015 5:23 PM > To: LINUX-390@VM.MARIST.EDU > Subject: Re: LVM usage > > Stories about TSM and Samba are great, but this is one installation for the > site and we are speaking in terms of z/VM, right? > This e-mail and the documents attached are confidential and intended solely > for the addressee; it may also be privileged. If you receive this e-mail in > error, please notify the sender immediately and destroy it. As its integrity > cannot be secured on the Internet, Atos’ liability cannot be triggered for > the message content. Although the sender endeavours to maintain a computer > virus-free network, the sender does not warrant that this transmission is > virus-free and will not be liable for any damages resulting from any virus > transmitted. On all offers and agreements under which Atos Nederland B.V. > supplies goods and/or services of whatever nature, the Terms of Delivery from > Atos Nederland B.V. exclusively apply. The Terms of Delivery shall be > promptly submitted to you on your request. ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/
