Hi,
thank you for pointing this out for me.
Also thanks an Marco for the forum Link, a wiki update would be a real
good idea. I tried to request an account but was unable to solve the
"confirmation code"?!
@the multipathing topic to restore vms, I restored a VM without and
problems.
thx
Harald
Am 22.06.2016 um 08:44 schrieb Sebastian Gruner:
Hi, you have to create a physical volume for each LUN
Pvcreate /dev/dm-0
Pvcreate /dev/dm-1
Then you can create a volumegroup
Vgcreate groupname /dev/dm-0
And extend the group with the second volume
Vgextend groupname /dev/dm-1
After that you can mount the lvm group aus storage in webinterface
###############################################################
Hi again^^,
I miss interpreted the benchmark result, with writeback cache is 5500 MB/s so
thats ok... with direct IO it gets about 100 MB/s
But I have still no clue how I could use multipath with proxmox web interface.
regards,
Harald
Am 21.06.2016 um 19:15 schrieb Harald Leithner:
Hi,
I have a MSA2312 connected with 1gbit to a 3 node PVE 4.2 Cluster.
I managed to get ISCSI and LVM working and attached it to a VM.
Atm I didn't manage to get multipath working with PVE because the
Wikipage tells me how to create multipath (which works) but not how
PVE uses it for LVM VGs... maybe someone give me a hint.
Anyway the main problem is that fio only gives me a read performance
of
5 mb/s if I attach a disk as virtio or scsi device with cache "Writeback".
If I attach the same SAN Drive directly in the VM with iSCSI (with and
without multipath) I get about 112 MB/s.
I also get this speed on the pve host.
I use:
fio --filename=/dev/sdb --direct=1 --rw=read --bs=1m --size=20G
--numjobs=200 --runtime=60 --group_reporting --name=file1
for benchmarking.
While benchmarking the VM I see 1300% cpu usage on the host (mainly
sys
time)
Maybe someone has a idea?
regards
--
Harald Leithner
ITronic
Wiedner Hauptstraße 120/5.1, 1050 Wien, Austria
Tel: +43-1-545 0 604
Mobil: +43-699-123 78 4 78
Mail: [email protected] | itronic.at
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_______________________________________________
pve-user mailing list
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--
Harald Leithner
ITronic
Wiedner Hauptstraße 120/5.1, 1050 Wien, Austria
Tel: +43-1-545 0 604
Mobil: +43-699-123 78 4 78
Mail: [email protected] | itronic.at
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pve-user mailing list
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