Revision d3d20dcdca9dc79d893a03dfa611fb1055c28f96 authored by Sagar Vemuri on 11 April 2019, 02:24:25 UTC, committed by Facebook Github Bot on 11 April 2019, 02:31:18 UTC
Summary: Introducing Periodic Compactions. This feature allows all the files in a CF to be periodically compacted. It could help in catching any corruptions that could creep into the DB proactively as every file is constantly getting re-compacted. And also, of course, it helps to cleanup data older than certain threshold. - Introduced a new option `periodic_compaction_time` to control how long a file can live without being compacted in a CF. - This works across all levels. - The files are put in the same level after going through the compaction. (Related files in the same level are picked up as `ExpandInputstoCleanCut` is used). - Compaction filters, if any, are invoked as usual. - A new table property, `file_creation_time`, is introduced to implement this feature. This property is set to the time at which the SST file was created (and that time is given by the underlying Env/OS). This feature can be enabled on its own, or in conjunction with `ttl`. It is possible to set a different time threshold for the bottom level when used in conjunction with ttl. Since `ttl` works only on 0 to last but one levels, you could set `ttl` to, say, 1 day, and `periodic_compaction_time` to, say, 7 days. Since `ttl < periodic_compaction_time` all files in last but one levels keep getting picked up based on ttl, and almost never based on periodic_compaction_time. The files in the bottom level get picked up for compaction based on `periodic_compaction_time`. Pull Request resolved: https://github.com/facebook/rocksdb/pull/5166 Differential Revision: D14884441 Pulled By: sagar0 fbshipit-source-id: 408426cbacb409c06386a98632dcf90bfa1bda47
1 parent ef0fc1b
restorejni.cc
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
// This source code is licensed under both the GPLv2 (found in the
// COPYING file in the root directory) and Apache 2.0 License
// (found in the LICENSE.Apache file in the root directory).
//
// This file implements the "bridge" between Java and C++ and enables
// calling C++ rocksdb::RestoreOptions methods
// from Java side.
#include <jni.h>
#include <stdio.h>
#include <stdlib.h>
#include <string>
#include "include/org_rocksdb_RestoreOptions.h"
#include "rocksdb/utilities/backupable_db.h"
#include "rocksjni/portal.h"
/*
* Class: org_rocksdb_RestoreOptions
* Method: newRestoreOptions
* Signature: (Z)J
*/
jlong Java_org_rocksdb_RestoreOptions_newRestoreOptions(
JNIEnv* /*env*/, jclass /*jcls*/, jboolean keep_log_files) {
auto* ropt = new rocksdb::RestoreOptions(keep_log_files);
return reinterpret_cast<jlong>(ropt);
}
/*
* Class: org_rocksdb_RestoreOptions
* Method: disposeInternal
* Signature: (J)V
*/
void Java_org_rocksdb_RestoreOptions_disposeInternal(JNIEnv* /*env*/,
jobject /*jobj*/,
jlong jhandle) {
auto* ropt = reinterpret_cast<rocksdb::RestoreOptions*>(jhandle);
assert(ropt);
delete ropt;
}
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