This is in fact a dutch video. The Netherlands is commonly counted among Western Europe. By the way; your first name does relates to Northern Europe ;-)
Thank you so much for the video. I was scouting many articles to understand, and here I come for 11 minutes, BooM I just got the concept. I have a few questions while I use the LVM on my linux: 1) How can I create drives like in explorer (e.g. in Windows we have C:/ , S:/, etc.)? Are these PVs or Logical volumes? 2) Is there a way to reverse the procedure, in case we mess up? That's all. Thanks for the very informative video. Looking forward to your answers.
I am trying to wrap my head around the concept of why I should have multiple VG if I can use one VG and extend whatever lv. Also if you extend a a filesystem with lvm using different drives, how does it choose which drive to use first when writing data ? What's the performance penalty exactly (slow hdd + nvme ssd ????). Can I resize the filesystem with lvm if I am using XFS? Btrfs? I need more information 😂 raid on lvm ?? Madm or lvm, advantages, disadvantages😬😁
I noticed that Arch Linux allows the boot partition to be in an LVM (you just need to add GRUB_PRELOAD_MODULES="lvm" to /etc/default/grub) but I think other distros like Ubuntu and Fedora do not. This doesn't make any sense because you should be able to modify the GRUB config file in any distro. Maybe it's because the installation routine in Ubuntu and Fedora don't let you modify the GRUB config file and so you will not be able to boot for the very first time after the install.
I'm glad somebody noticed that, I did too. Ubuntu has not needed any special treatment for GRUB since at least before 2014, you can just install Ubuntu in one single LVM and everything just works. That is what the GRUB module called lvm.mod is for. But the documentation has not been updated, as far as I know it still says you need a separate /boot (outside of the LVM), and most people are slow to change their old ways.
If you want to add an entire disk, say /dev/sdb, to a VG, you don't need to create an empty partition on it and assign it a type of 8e. You can just do 'pvcreate /dev/sdb' and it will be turned into a PV which can then be used to extend your VG. Am I correct? (I think I am because I have done this in virtualbox.)
I also did that and it worked and i am still wondering why its necessary why we have to create a partition inside /dev/sdb .... but the only reason that came to my mind is ,partitioning is necessary if you dont want to add the whole disk into the same VG
It is true, you can add the hard disk directly as a pv, using pvcreate, the disadvantage is that if on a SAN (or in any other way) the disk becomes visible for another server or operating system, that server would not see that it is used by LVM. So you have the risk that the ignorant admin on that server would just overwrite everything and start doing whatever he wants to do on that disk. For that reason, even if it's not required to create a partition on the disk, it is recommended to do so.
HI Sander, here its question me about wipe data on adding a new PV to existente VG, if I choose YES, what this means? this will erase my data in that PV? Its must need I perform backup before this operations? my regards
Hie @ dotz864, adding a new PV to an existing VG wont affect your data unless that PV was being used somewhere and had data in it,wiping your PV if it was never used jus means that you are re-initializing your PV and preparing it for use
martin chamambo18 minutos atrás tanks martin, perhaps my situation is: I need add a PV full of encrypted data, how make this this and keed that data secure?
At 3:10, you run df -h and you say the root file system is what size? 6.7 GB? What about a few lines down; /dev/sda1? That is a physical disk or no? How does this device fit in with what you are describing?
what if you already have 2 partitions sda1 and sda2, and you only have one hard disk (sda)? How can you create an additional swap partition, a primary partition, and a new LV, VG, or PV (or extend the LV)?
Looking at this again, I think he means because there is no 'sdb1' or 'sdb2' as there are for sda (sda1 and sda2 are visible), but this is not explained very well at all.
Goodman it, I really wanted to watch this. Anouk however is very distracting and my physical volume keeps extending because of the thoughts I keep having in my logical volume and all I want to do is corrupt my FS type. She's too cute, Very attractive and a very well put together young lady. Five years ago. I wonder what Anouk is up to today.
On windows you have to clean up the drive, on Linux you have to add more drives. Jesus this guy either has bad English or has no clue. Ever heard of storage spaces or storage pools? Dynamic disks?…
Oh man this Northern European dryness is so awesome.
This is in fact a dutch video. The Netherlands is commonly counted among Western Europe. By the way; your first name does relates to Northern Europe ;-)
Anouk extended the logical volume of my heart.
Grow up
@@danielsaan1976 Seems like you've grown up so hard you've forgot all about fun
@@Herearetheundead she's a person. Be respectful.
Wish I found this before googling for two hours about LVM management
Anouk saved the day, man!
we love Anouk :)
Thank you! As Anouk said in the video, that was actually pretty clear and easy!
This was an awesome explanation. Love to learn with examples. Thank you so much.
Very informative Oblivion npc conversation.
Every time I run out of room on a machine I find my way back here. Very good explanation
top video, duidelijke en simpele uitleg. dankje.
Anouk, the ultimate click bait for nerds
:))
I swear I've watched this thing 3 times and still haven't seen a video.
@@ForSquirel what do you mean ?
Looks like the emissions of Sheldon with flags in big bang theory
Thank you so much for the video. I was scouting many articles to understand, and here I come for 11 minutes, BooM I just got the concept. I have a few questions while I use the LVM on my linux:
1) How can I create drives like in explorer (e.g. in Windows we have C:/ , S:/, etc.)? Are these PVs or Logical volumes?
2) Is there a way to reverse the procedure, in case we mess up?
That's all. Thanks for the very informative video. Looking forward to your answers.
Thanks - walked through same time as video - everything works - still new to linux.
Sander this is great please give more updates even on cantos 7
Upload videos about how to recover lvm using metadata
awesome sir, thank you for opening up this topic prior to my coming interview..
I am trying to wrap my head around the concept of why I should have multiple VG if I can use one VG and extend whatever lv. Also if you extend a a filesystem with lvm using different drives, how does it choose which drive to use first when writing data ? What's the performance penalty exactly (slow hdd + nvme ssd ????). Can I resize the filesystem with lvm if I am using XFS? Btrfs? I need more information 😂 raid on lvm ?? Madm or lvm, advantages, disadvantages😬😁
After the lesson they lit up a big fat spliff
Nice and clear explanation about lvm.
Thnx
Thank you so much, this video made it so simple to under the lvm.
I noticed that Arch Linux allows the boot partition to be in an LVM (you just need to add GRUB_PRELOAD_MODULES="lvm" to /etc/default/grub) but I think other distros like Ubuntu and Fedora do not. This doesn't make any sense because you should be able to modify the GRUB config file in any distro. Maybe it's because the installation routine in Ubuntu and Fedora don't let you modify the GRUB config file and so you will not be able to boot for the very first time after the install.
I'm glad somebody noticed that, I did too. Ubuntu has not needed any special treatment for GRUB since at least before 2014, you can just install Ubuntu in one single LVM and everything just works. That is what the GRUB module called lvm.mod is for. But the documentation has not been updated, as far as I know it still says you need a separate /boot (outside of the LVM), and most people are slow to change their old ways.
In fdisk it is not always "8e" code for LinuxLVM partition type! Use L option to list correct codes!
Thank you for the excellent video.
I like Anouk more than lvm… ))
Great explanation, thank you...
Very well explained
Thank you for this video.
Excellent instruction! Thank you!
Bet Sander wants to give her the hard drive!
u nailed it dude
If a phisic volum broken in the storage or in the server, how i rescue the content from the pool?How better way to avoid this?
The innocent girl had to cram a lot of terminologies 😂👍🏻👍🏻
HEHEHEH this video is bloody BRILLIANT
Character In the video It's great, I like it a lot $$
Nice presentation.
i love you Anouk
How did you come to know sdb is not used at all at 5:18
Pretty nice explation CONGRATS BTW Anouk look so beautiful !! that helps within the explanations
very good explanation
After creating it and choosing a partition type what to do if it gets you inside grub rescue?
Excellent video, a bit late for me i already give RHCSA exam and cute woman!!
Nicely explained
If you want to add an entire disk, say /dev/sdb, to a VG, you don't need to create an empty partition on it and assign it a type of 8e. You can just do 'pvcreate /dev/sdb' and it will be turned into a PV which can then be used to extend your VG. Am I correct? (I think I am because I have done this in virtualbox.)
I also did that and it worked and i am still wondering why its necessary why we have to create a partition inside /dev/sdb .... but the only reason that came to my mind is ,partitioning is necessary if you dont want to add the whole disk into the same VG
It is true, you can add the hard disk directly as a pv, using pvcreate, the disadvantage is that if on a SAN (or in any other way) the disk becomes visible for another server or operating system, that server would not see that it is used by LVM. So you have the risk that the ignorant admin on that server would just overwrite everything and start doing whatever he wants to do on that disk. For that reason, even if it's not required to create a partition on the disk, it is recommended to do so.
HI Sander, here its question me about wipe data on adding a new PV to existente VG, if I choose YES, what this means? this will erase my data in that PV? Its must need I perform backup before this operations? my regards
Hie @ dotz864, adding a new PV to an existing VG wont affect your data unless that PV was being used somewhere and had data in it,wiping your PV if it was never used jus means that you are re-initializing your PV and preparing it for use
martin chamambo18 minutos atrás tanks martin, perhaps my situation is: I need add a PV full of encrypted data, how make this this and keed that data secure?
Thanks a lot!
explained very nicely
I fell in love with Anouk
Hello sir im intersted learn to rhel os .so what version is perfer to me perfer carrer objective way to grow in ur point of view ??
How did he know that the sdb isn't being used at all ?
thanks a lot
At 3:10, you run df -h and you say the root file system is what size? 6.7 GB? What about a few lines down; /dev/sda1? That is a physical disk or no? How does this device fit in with what you are describing?
That's the boot partition...
Thanks , well said
Well explained
what if you already have 2 partitions sda1 and sda2, and you only have one hard disk (sda)? How can you create an additional swap partition, a primary partition, and a new LV, VG, or PV (or extend the LV)?
You wld need to add a new disk. Sda is reserved for system partitions. Whn you add a new disk, then you can start partitioning sdb.
Thank you
This is so good
How to resize a vfat filesystem for lvm??
Thanks Man
love this..
@5:19 "..the sdb is not used at all..." Wait a sec; how can you tell that from what you're seeing??
Looking at this again, I think he means because there is no 'sdb1' or 'sdb2' as there are for sda (sda1 and sda2 are visible), but this is not explained very well at all.
It wasn't mounted, I would do lsblk command rather cat /proc/partitions
thnx!
Nice video. I wish we had more friendly tech-savvy girls in the States.
Anouk could extend my root filesystem anytime.
For starters, the command lvs doesn't work. And sudo lvs as well. It just doesn't do anything.
requires root privelages; try su
❤️❤️❤️
Are they robots?
Females do not care about Linux logical volumes. Trust me - I asked LOTS of them about it.
This pick up line might work in data centre cafeteria. But it won't work in a normal restaurant.
So if she said no on the question, have you ever been run out of memory, the video is over ;-)
She is really beautiful 🖤🖤
this is hilarious.
I agree ^^
Can she talk?
she is beautiful
Goodman it, I really wanted to watch this. Anouk however is very distracting and my physical volume keeps extending because of the thoughts I keep having in my logical volume and all I want to do is corrupt my FS type.
She's too cute, Very attractive and a very well put together young lady. Five years ago. I wonder what Anouk is up to today.
Anouk beauty distracts me... =/
These two taught the first Power Rangers how to act.
Anouk, is she single? I am single and handsome, lol.
I wish all professors had sweet gals standing next to them, commenting things every now and then. Very cute.
lol, dorks
Explanation is nice, but the his accent is so Dutch, it's just bleeding my ears and painful to watch
The vgs command also doesn't work for me. Sorry, I don't find this video useful at all...
On windows you have to clean up the drive, on Linux you have to add more drives. Jesus this guy either has bad English or has no clue. Ever heard of storage spaces or storage pools? Dynamic disks?…
Well explained