alluxio.worker.block.allocator

Interface Allocator

All Known Implementing Classes:

GreedyAllocator, MaxFreeAllocator, RoundRobinAllocator

@PublicApi
public interface Allocator

Interface for the allocation policy of Alluxio managed data.

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static class	Allocator.Factory Factory for Allocator.

Method Summary

Modifier and Type	Method and Description
StorageDirView	allocateBlockWithView(long sessionId, long blockSize, BlockStoreLocation location, BlockMetadataManagerView view) Allocates a block from the given block store location under a given view.

Method Detail

allocateBlockWithView

StorageDirView allocateBlockWithView(long sessionId,
                                     long blockSize,
                                     BlockStoreLocation location,
                                     BlockMetadataManagerView view)

Allocates a block from the given block store location under a given view. The location can be a specific location, or BlockStoreLocation.anyTier() or BlockStoreLocation.anyDirInTier(String). The view is generated by a BlockStore.

Parameters:

sessionId - the id of session to apply for the block allocation

blockSize - the size of block in bytes

location - the location in block store

view - of the metadata manager

Returns:

a StorageDirView in which to create the temp block meta if success, null otherwise