2:31 a.m.
Hello,
I recently deployed oVirt in some hosts to evaluate it as one of my main virtualization
tool. I like it a lot, but I don't know if this behaviour is normal: I just configured
my iSCSI network against a IBM V7000, and from that point on, the host with the role
"SPM" continuosly is reading from storage at about 7 or 8 Mbps. I don't know
what it i doing, due to no storage domains are still created. How can I know what it is
doing ?
Regards,
Silvio
4:44 a.m.
New subject: iSCSI constantly reading from storage (about 8 Mbps) after connecting hosts to storage
Hello again,
I created a storage domain. When I put that storage in "Maintenance", iSCSI
trafic drops to 0. When I activate the storage, iSCSI traffic raises to about 7 or 8 Mbps
constantly. The storage is empty, no VMs created yet. The LUN is created Thin and
Compressed in V7000. Any hint?
Regards,
Silvio
4:37 p.m.
New subject: iSCSI constantly reading from storage (about 8 Mbps) after connecting hosts to storage
On Fri, Oct 5, 2018 at 11:51 AM <silvio.delval(a)pandasecurity.com> wrote:
Hello again,
I created a storage domain. When I put that storage in "Maintenance",
iSCSI trafic drops to 0. When I activate the storage, iSCSI traffic raises
to about 7 or 8 Mbps constantly. The storage is empty, no VMs created yet.
The LUN is created Thin and Compressed in V7000. Any hint?
This may be the normal I/O done for cluster based locking, storage
monitoring
and storage mailbox.
In any host in the cluster:
- sanlock reads 1MiB from the logical volume "domain-uuid/ids" every 20
seconds
(or 10 seconds, need to check sanlock source).
- vdsm reads 4K from logical volume "domain-uuid/metadata" every 10 seconds
- vdsm refreshes LVM metdata every 300 seconds, running "vgs" and
"lvs"
for every storage domain.
- multipathd checks all LUNs every 20 seconds
On the SPM additionally:
- vdsm reads 10240 bytes from logical volume "domain-uuid/inbox" every 2
seconds
Nir
4:47 p.m.
New subject: iSCSI constantly reading from storage (about 8 Mbps) after connecting hosts to storage
On Wed, Oct 17, 2018 at 11:37:33PM +0300, Nir Soffer wrote:
- sanlock reads 1MiB from the logical volume
"domain-uuid/ids" every 20
seconds
Every 20 seconds sanlock reads 1MB and writes 512 bytes to monitor and
renew its leases in the lockspace.
2262
days inactive
2283
days old
3 comments
3 participants
participants (3)
-
David Teigland -
Nir Soffer -
silvio.delval＠pandasecurity.com