filesystem

[ressel]

Hello everyone,

I have 2x hp DL360e servers with a shared HP Storageworks D2600 with 10x 600GB disks and connect to with hba controller on both servers.
What file system should I use, if I would like to have some parity / raid and be able to access filesystem shared between hosts, so I can have some HA vm's ?

 

[wolfgang]

Hi,

For HA you need min a qdevice on an extra node.[1]

You can do
1.) ZFS with the replica. This can sync every minute. But in failover case, you loose up to the syncing interval what is min one min.

2.) Gluster FS [2]

1.) https://pve.proxmox.com/wiki/Cluster_Manager#_corosync_external_vote_support
2.) https://www.gluster.org/

 

[ressel]

Thank you,
But this is not what I was looking for.
So instead I have setup a 3rd server running freenas and use zfs over iscsi

My setup was a bit like this (fig. 1):

https://github.com/ewwhite/zfs-ha/wiki

 

[alexskysilk]

you can use lvm, as long as both nodes are in the cluster. thes caveat that snapshots dont work right, and neither do thin provisioned volumes (@wolfgang please confirm, this info is old.)

 

[wolfgang]

Sorry, I mixed this HP Storageworks D2600 up with another Storage type.

alexskysilk is correct you can only use LVM with this Storage.
Thin LVM does not work because the metadata can't access from more than one host.
If this would happen the metadata is intended corrupt.