Hi Andrei,
Try playing with concurrent.snapshots.threshold.perhost. (empty is treated as 1). Regards, Rohit Yadav Software Architect, ShapeBlue https://www.shapeblue.com ________________________________ From: Andrei Mikhailovsky <and...@arhont.com.INVALID> Sent: Thursday, June 13, 2019 6:54:07 PM To: dev Subject: Re: Concurrent Volume Snapshots Hi Rohit, I have updated some of those options to increase the timeout to 2 days rather than a few hours by default. However, these options relate to the timeout of the process. I was wondering if there is an option to allow simultaneous snapshotting of volumes on a single VM? I would like all volumes of the vm to be copied over to the secondary storage at the same time, rather than one after another. Cheers rohit.ya...@shapeblue.com www.shapeblue.com Amadeus House, Floral Street, London WC2E 9DPUK @shapeblue ----- Original Message ----- > From: "Rohit Yadav" <rohit.ya...@shapeblue.com> > To: "dev" <dev@cloudstack.apache.org> > Sent: Thursday, 13 June, 2019 14:02:21 > Subject: Re: Concurrent Volume Snapshots > You can try to experiment with the following global settings: > > > wait > > backup.snapshot.wait > copy.volume.wait > vm.job.lock.timeout > > > Regards, > > Rohit Yadav > > Software Architect, ShapeBlue > > https://www.shapeblue.com > > ________________________________ > From: Andrei Mikhailovsky <and...@arhont.com.INVALID> > Sent: Thursday, June 13, 2019 6:27:23 PM > To: dev > Subject: Concurrent Volume Snapshots > > Hello everyone > > I am having running snapshot issues on large volumes. The hypervisor is KVM > and > the storage backend is Ceph (rbd). ACS version is 4.11.2. Here is my issue: > > I've got several vms with 3-6 volumes of 2TB each. I have a recurring schedule > setup to take a snapshot of each volume once a month. It takes a long time for > a volume to be snapshotted (in a magnitude of 20 hours). As a result, when the > schedule kicks in, it only manages to snapshot the first volume and the > snapshots of the other volumes fail due to the async job timeout. From what I > have discovered, ACS only does a single volume snapshot at a time. I can't > seem > to find the settings to enable concurrent snapshotting. So, it can't snapshot > all of the vm volumes at the same time. This is very much problematic for many > reasons, but the main reason is that upon recovery of multiple volumes, the > data on those will not be consistent. > > Is there a way around it? Perhaps there is an option in the settings that I > can't find that disables this odd behaviour of the volume snapshots? > > Cheers > > Andrei > > rohit.ya...@shapeblue.com > www.shapeblue.com<http://www.shapeblue.com> > Amadeus House, Floral Street, London WC2E 9DPUK > @shapeblue
