Hi,
For a specific use-case I'm looking into the possibility to use iSCSI in
combination with KVM.
Use-case: Low-latenc I/O with 4k blocks and QD=1
KVM with CloudStack doesn't support iSCSI natively and the docs and
other blogs refer to using 'SharedMountPoint' with OCFS2 or GFS2:
-
http://docs.cloudstack.apache.org/en/latest/adminguide/storage.html#hypervisor-support-for-primary-storage
-
https://www.shapeblue.com/installing-and-configuring-an-ocfs2-clustered-file-system/
It has been a really long time since I've used OCFS2 and I wanted to see
what experiences from other people are.
How is the stability and performance of OFCS2? It seems that performance
should be rather good as lock/s is a problem with clustered filesystems,
but since we only lock the QCOW2 file on boot of the VM that shouldn't
be an issue.
In addition to OCFS2, how mature is 'SharedMountPoint' as a storage pool
with KVM. Does is support all the features NFS supports?
Thanks,
Wido
