Package org.apache.ignite.internal.processors.cache.persistence.pagemem

This package contains page memory implementation for case persitence is enabled. Contained clasees with

• Page Memory implementation PageMemoryImpl.
• Page Write Throttling.
• Mapping of full Page IDs to place in memory segment.
• Pages replacement with disk.

See also Package description

Interface Summary

Interface	Description
LoadedPagesMap	Interface for storing correspondence of page ID in a cache group to long value (address in offheap segment).
LoadedPagesMap.KeyPredicate	Interface describing a predicate for Key (cache group ID, page ID).
PageMemoryEx	Page memory with some persistence related additions.
PageMetrics	Container for different memory page-related metrics.
PageReadWriteManager
PageReplacementPolicyFactory	Page replacement policy factory.
PagesWriteThrottlePolicy	Throttling policy, encapsulates logic of delaying write operations.

Class Summary

Class	Description
CheckpointMetricsTracker	Tracks various checkpoint phases and stats.
ClockPageReplacementFlags	Clock page replacement algorithm implementation.
ClockPageReplacementPolicy	CLOCK page replacement policy implementation.
ClockPageReplacementPolicyFactory	ClockPageReplacementPolicy factory.
DelayedDirtyPageStoreWrite	Not thread safe and stateful class for page replacement of one page with write() delay.
DelayedPageReplacementTracker	Delayed page writes tracker.
FullPageIdTable
PageMemoryImpl	Page header structure is described by the following diagram.
PageMetricsImpl
PageMetricsImpl.Builder	Builder for PageMetricsImpl instances.
PagePool
PageReadWriteManagerImpl
PageReplacementPolicy	Abstract page replacement policy.
PagesWriteSpeedBasedThrottle	Throttles threads that generate dirty pages during ongoing checkpoint.
PagesWriteThrottle	Throttles threads that generate dirty pages during ongoing checkpoint.
RandomLruPageReplacementPolicy	Random-LRU page replacement policy implementation.
RandomLruPageReplacementPolicyFactory	RandomLruPageReplacementPolicy factory.
ReplaceCandidate	Replacement removal candidate.
RobinHoodBackwardShiftHashMap	Loaded pages mapping to relative pointer based on Robin Hood hashing: backward shift deletion algorithm.
SegmentedLruPageList	Pages Segmented-LRU (SLRU) list implementation.
SegmentedLruPageReplacementPolicy	Segmented-LRU page replacement policy implementation.
SegmentedLruPageReplacementPolicyFactory	SegmentedLruPageReplacementPolicy factory.

Enum Summary

Enum	Description
PageMemoryImpl.ThrottlingPolicy	Throttling enabled and its type enum.