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Materialize the hash index

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Summary:
Materialize the hash index to avoid the soaring cpu/flash usage
when initializing the database.

Test Plan: existing unit tests passed

Reviewers: sdong, haobo

Reviewed By: sdong

CC: leveldb

Differential Revision: https://reviews.facebook.net/D18339
This commit is contained in:
Kai Liu
2014-05-15 14:09:03 -07:00
parent 4e0602f941
commit 0b3d03d026
12 changed files with 389 additions and 141 deletions
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15
table/block_based_table_reader.h
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@@ -160,8 +160,13 @@ class BlockBasedTable : public TableReader {
friend class BlockBasedTableBuilder;
void ReadMeta(const Footer& footer);
void ReadFilter(const Slice& filter_handle_value);
Status CreateIndexReader(IndexReader** index_reader);
// Create a index reader based on the index type stored in the table.
// Optionally, user can pass a preloaded meta_index_iter for the index that
// need to access extra meta blocks for index construction. This parameter
// helps avoid re-reading meta index block if caller already created one.
Status CreateIndexReader(IndexReader** index_reader,
Iterator* preloaded_meta_index_iter = nullptr);
// Read the meta block from sst.
static Status ReadMetaBlock(
@@ -170,10 +175,8 @@ class BlockBasedTable : public TableReader {
std::unique_ptr<Iterator>* iter);
// Create the filter from the filter block.
static FilterBlockReader* ReadFilter(
const Slice& filter_handle_value,
Rep* rep,
size_t* filter_size = nullptr);
static FilterBlockReader* ReadFilter(const BlockHandle& filter_handle,
Rep* rep, size_t* filter_size = nullptr);
static void SetupCacheKeyPrefix(Rep* rep);