So wait. Are you telling me that Cloudstack does a full backup of the volume every time a snapshot is taken?
What's the point of snapshots then? Making specific operations faster? -- Alexandre Bruyère -----Original Message----- Re: Questions on snapshots From: Andrija Panic <andrija.pa...@gmail.com> To: users <users@cloudstack.apache.org> Friday, October 26, 2018 at 3:38 PM So :) 1. Snap interval - scheduled snaps are max 1h per the so called "hourly" schedule - so makes sense :) You could do some automation, by creating manual snapshots and deleting oldest ones via automation - i.e. you can use Cloud Monkey, CLI utility that talk to API and is great for any kind of automation, unless you talk directly to API from i.e. Python etc, via HTTPS. 2. number of snaps: Go to Global Configuration, there is parameter "snapshot.max.hourly" - and you can change it, I assume to <=24 ...(restart mgmt server and you are good),(there are similar for daily and monthly) Now, related to snapshots - when you decided to really use them (i.e. in production) - a BIG warning - make sure to "know" what you are doing... Because so far, when you create a snapshot of the volume on Primary Storage (NFS or CEPH), there is really a snapshot that is created almost instantly of that volume, but then the whole image (so whole image in that point in time) is being copied over (qemu-img) to the Secondary Storage NFS - and in case of too frequent snaps, or modest networking, this might at some point throttle your network and also break some logic inside CloudStack For example: I had clients that were expecting to do hourly snapshots of the 2TB image (right... perhaps a too much expectation from their side) and this can fail with timeout (in my case it was modest CEPH performance) Also pay attention to schedules, so you don't have hourly snap (one of hourly runs) begin at i.e. 17.00h and then you configured at same time (17.00) daily (/weekly/monthly) at 17.00 (or about the same time) - those later snaps will simply fail, because there is already ongoing snap on the same volume. Sorry long post... Cheers Andrija On Fri, 26 Oct 2018 at 20:53, Alexandre Bruyere <bruyere.alexan...@gmail.com > wrote: > Hello. > > I'm currently investigating the functions of Cloudstack, and looked into > snapshots. > > As far as I can tell, the smallest possible interval for snapshots is one > hour. Is there a way to schedule them more frequently? For my use, 5 > minutes snapshots would be ideal. > > Also, it's limiting me to 8 snapshots kept. Is it possible to keep a larger > number of them - whether it is by changing configurations, by some other > mechanic or any other way? > -- Andrija Panić -----Original Message----- Re: Questions on snapshots From: Andrija Panic <andrija.pa...@gmail.com> To: users <users@cloudstack.apache.org> Friday, October 26, 2018 at 3:38 PM
