> Does it ensure consistency while copying data which is parallely getting > updated by application writes
Yes. From the documentation: «An Ignite snapshot includes a consistent cluster-wide copy of all data records persisted on disk and some other files needed for a restore procedure.» > will this be a stop the world process No. > 24 мая 2022 г., в 21:17, Surinder Mehra <redni...@gmail.com> написал(а): > > Hi > Thanks for reply. > > #1: So it's not a stop the world task. Does it ensure consistency while > copying data which is parallely getting updated by application writes. Or > does it mark the data to copied and ignore further updates on it. > > #2: > I will try sync snapshot. But just to confirm, will this be a stop the world > process. Couldn't find anything on Documentation page about it > > On Tue, 24 May 2022, 23:12 Николай Ижиков, <nizhi...@apache.org > <mailto:nizhi...@apache.org>> wrote: > Hello, Mehra. > > > 1. Is it stop the world process. > > No, you can perform any actions. > Note, topology changes will cancel snapshot create process. > > > 2. If so, is it stop the world only during command execution (500millis) or > > until snapshot Dara is fully copied(takes many minutes) to complete. > > Please, take a look at `—sync` option of create snapshot command (you can see > help in `control.sh` output). > `EVT_CLUSTER_SNAPSHOT_FINISHED` raise on snapshot create finish. > > > 3. Is there a way around to speed up this other than increasing snapshot > > threads > > Stop write operations. > The less you change the quicker snapshot will be created. > >> 24 мая 2022 г., в 20:12, Surinder Mehra <redni...@gmail.com >> <mailto:redni...@gmail.com>> написал(а): >> >> Hi, >> I have 3 node ignite cluster each node contains 60G work directory(ebs) and >> I need to create snapshots. >> I followed steps to create snapshots and run create snapshot command using >> control utility. Command completed in 500millis but snapshot directory only >> had 400Mb data. Later I realised directory size grew up 30G. I suppose it >> would reach size of work directory. >> >> >> I have few questions. >> 1. Is it stop the world process. >> 2. If so, is it stop the world only during command execution (500millis) or >> until snapshot Dara is fully copied(takes many minutes) to complete. >> 3. Is there a way around to speed up this other than increasing snapshot >> threads >
