iSCSI constantly reading from storage (about 8 Mbps) after connecting hosts to storage
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
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
On Fri, Oct 5, 2018 at 11:51 AM <silvio.delval@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
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.
participants (3)
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David Teigland -
Nir Soffer -
silvio.delval＠pandasecurity.com