Revision df5eeb85caf76a2f038d4029f95de36b91ee0054 authored by Yi Wu on 13 November 2016, 21:00:52 UTC, committed by Facebook Github Bot on 13 November 2016, 21:09:16 UTC
Summary: Implement a insert hint into skip-list to hint insert position. This is to optimize for the write workload where there are multiple stream of sequential writes. For example, there is a stream of keys of a1, a2, a3... but also b1, b2, b2... Each stream are not neccessary strictly sequential, but can get reorder a little bit. User can specify a prefix extractor and the `SkipListRep` can thus maintan a hint for each of the stream for fast insert into memtable. This is the internal implementation part. See #1419 for the interface part. See inline comments for details. Closes https://github.com/facebook/rocksdb/pull/1449 Differential Revision: D4106781 Pulled By: yiwu-arbug fbshipit-source-id: f4d48c4
1 parent 5ed6508
xfunc.cc
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
// This source code is licensed under the BSD-style license found in the
// LICENSE file in the root directory of this source tree. An additional grant
// of patent rights can be found in the PATENTS file in the same directory.
#ifdef XFUNC
#include "util/xfunc.h"
#include <string>
#include "rocksdb/db.h"
#include "rocksdb/options.h"
#include "rocksdb/utilities/optimistic_transaction_db.h"
#include "rocksdb/write_batch.h"
namespace rocksdb {
std::string XFuncPoint::xfunc_test_;
bool XFuncPoint::initialized_ = false;
bool XFuncPoint::enabled_ = false;
int XFuncPoint::skip_policy_ = 0;
void GetXFTestOptions(Options* options, int skip_policy) {
if (XFuncPoint::Check("inplace_lock_test") &&
(!(skip_policy & kSkipNoSnapshot))) {
options->inplace_update_support = true;
}
}
void xf_manage_options(ReadOptions* read_options) {
if (!XFuncPoint::Check("managed_xftest_dropold") &&
(!XFuncPoint::Check("managed_xftest_release"))) {
return;
}
read_options->managed = true;
}
void xf_transaction_set_memtable_history(
int32_t* max_write_buffer_number_to_maintain) {
*max_write_buffer_number_to_maintain = 10;
}
void xf_transaction_clear_memtable_history(
int32_t* max_write_buffer_number_to_maintain) {
*max_write_buffer_number_to_maintain = 0;
}
} // namespace rocksdb
#endif // XFUNC
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