ARomantsov created IGNITE-11729:
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Summary: Low description for lost policy functional
Key: IGNITE-11729
URL: https://issues.apache.org/jira/browse/IGNITE-11729
Project: Ignite
Issue Type: Improvement
Components: documentation
Affects Versions: 2.7
Reporter: ARomantsov
Fix For: 3.0, 2.8
Current description in
https://apacheignite.readme.io/docs/partition-loss-policies seems not covered
persistence case and text description is not clean
Probably we need to transform it into two tables (in-memory, persistence)
Rows - cache_write, cache_read, cache_remove,sql_read, sql_write
Columns - READ_ONLY_SAFE ,READ_ONLY_ALL, READ_WRITE_SAFE, etc
{code:java}
Policies
Ignite supports the following PartitionLossPolicies:
READ_ONLY_SAFE - all writes to a cache/table will fail with an exception. Reads
will only be allowed for entries belonging to survived/alive partitions. Reads
from lost partitions will fail with an exception.
READ_ONLY_ALL - reads are allowed from any partition including the lost ones.
An exception is thrown in an attempt to write to any partition. The result of
reading from a lost partition is undefined and may be different on different
nodes in the cluster.
READ_WRITE_SAFE - all reads and writes are allowed for entries in
survived/alive partitions. All reads and writes of entries belonging to the
lost partitions will fail with an exception.
READ_WRITE_ALL - all reads and writes will proceed as if all partitions were in
a consistent state (as if no partition loss happened). The result of reading
from a lost partition is undefined and may be different on different nodes in
the cluster.
IGNORE - this mode never marks a lost partition as lost, pretending that no
partition loss has happened and clearing the partition loss state right away.
Technically, the partition will not be added to the collection of
lostPartitions which is the main difference from READ_WRITE_ALL mode. IGNORE
mode is used by default.
{code}
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