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# Enum PartitionLossPolicy

Partition loss policy. Defines how cache will behave in a case when one or more partitions are lost because of a node(s) failure.

All Safe policies prevent a user from interaction with partial data in lost partitions until ResetLostPartitions(IEnumerable<String>) method is called.

*All policies allow working with partial data in lost partitions.

ReadOnly and ReadWrite* policies do not automatically change partition state and thus do not change rebalancing assignments for such partitions.

###### Namespace: Apache.Ignite.Core.Cache.Configuration

###### Assembly: Apache.Ignite.Core.dll

##### Syntax

    public enum PartitionLossPolicy : int

### Fields

Name | Description
--- | ---
Ignore | If partition is lost, reset it's state and do not clear intermediate data. The result of reading from a previously lost and not cleared partition is undefined and may be different on different nodes in the cluster.
ReadOnlyAll | All writes to the cache will be failed with an exception. All reads will proceed as if all partitions were in a consistent state. The result of reading from a lost partition is undefined and may be different on different nodes in the cluster.
ReadOnlySafe | All writes to the cache will be failed with an exception, reads will only be allowed for keys in non-lost partitions. Reads from lost partitions will be failed with an exception.
ReadWriteAll | All reads and writes will proceed as if all partitions were in a consistent state. The result of reading from a lost partition is undefined and may be different on different nodes in the cluster.
ReadWriteSafe | All reads and writes will be allowed for keys in valid partitions. All reads and writes for keys in lost partitions will be failed with an exception.