Mmuzaf commented on a change in pull request #8128: URL: https://github.com/apache/ignite/pull/8128#discussion_r484866770
########## File path: docs/_docs/persistence/snapshot.adoc ########## @@ -3,33 +3,40 @@ == Overview Apache Ignite 2.9 comes with an ability to create fully consistent cluster-wide snapshots for deployments with -the link:persistence/native-persistence[Ignite Native Persistence]. You can create at runtime any number of snapshots -of all configured persistent cache groups. The snapshot is a consistent copy of all cache group data files (except -structures used for crash recovery) for each baseline node in a cluster. Since data of persistent cache groups stored -on disk in files on each node (cache group partition files, configuration files, binary metadata) the snapshot will -contain a copy of the same files with keeping Ignite cluster node data directory structure and the node consistent ids. +the link:persistence/native-persistence[Ignite Native Persistence]. At runtime, you can create multiple snapshots of all +configured persistent cache groups. The snapshot is a consistent copy of all cache group data files (except +structures used for crash recovery) for each baseline node in a cluster. Since data of persistent cache groups is stored +on disk in files for each node (cache group partition files, configuration files, binary metadata) in a cluster, +the snapshot will contain a copy of the same files with keeping Ignite cluster node data directory structure and node consistent IDs. -*Snapshot Consistency.* +=== Snapshot Consistency -All snapshots you created are fully consistent in terms of concurrent cluster-wide operations and all ongoing changes of -system files on the local node. Primary and backup cache group partitions will be also fully consistent in created +All snapshots you've created are fully consistent in terms of concurrent cluster-wide operations and all ongoing changes of +system files on the local node. Primary and backup cache group partitions will also be fully consistent in created snapshots. -The cluster-wide snapshot consistency achieved by triggering the +The cluster-wide snapshot consistency is achieved by triggering the link:https://cwiki.apache.org/confluence/display/IGNITE/%28Partition+Map%29+Exchange+-+under+the+hood[Partition-Map-Exchange] -procedure. Doing this the cluster will eventually get a point in time when all previously started transactions -finished on primary and backups, and new ones are hold until a new snapshot operation will be started. +procedure. Doing this the cluster will eventually get a point in time when all previously started transactions are +finished on primary and backups, and new ones are hold until a new snapshot operation will be initiated. Review comment: Fixed ########## File path: docs/_docs/persistence/snapshot.adoc ########## @@ -62,25 +69,25 @@ work └── marshaller ---- -*Requirements.* +=== Requirements -You need an extra space on disk for the configured Ignite native persistence directory up to the current size this directory. -This space will be used for storing intermediate snapshot results and will be freed when the snapshot operation ends. +A configured Ignite native persistence directory requires additional disk space (up to the current size of this directory). +This space will be used for storing intermediate snapshot results and cleaned up after the snapshot operation completes. Review comment: Fixed ########## File path: docs/_docs/persistence/snapshot.adoc ########## @@ -62,25 +69,25 @@ work └── marshaller ---- -*Requirements.* +=== Requirements -You need an extra space on disk for the configured Ignite native persistence directory up to the current size this directory. -This space will be used for storing intermediate snapshot results and will be freed when the snapshot operation ends. +A configured Ignite native persistence directory requires additional disk space (up to the current size of this directory). +This space will be used for storing intermediate snapshot results and cleaned up after the snapshot operation completes. -*Limitations.* +=== Limitations -The snapshot procedure has some limitations that you should be aware of before using it at your production environment: +The snapshot procedure has some limitations that you should be aware of before using it within your production environment: -* taking a snapshot of particular cache or cache group not supported; -* in-memory caches will not be included into snapshot; -* encrypted caches not supported and will be ignored; -* only single snapshot operation can be started at once; -* snapshot procedure will be interrupted if any baseline node leave the cluster; -* snapshot recovery at the same baseline topology with the same consistent node id; +* taking a snapshot of a particular cache or cache group is not supported; +* in-memory caches will not be included into a snapshot; +* encrypted caches are not supported and will be ignored; +* only one snapshot operation at a time can be started; Review comment: Fixed ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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