1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
|
/*
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
*/
#include "qpid/linearstore/journal/LinearFileController.h"
#include "qpid/linearstore/journal/EmptyFilePool.h"
#include "qpid/linearstore/journal/jcntl.h"
#include "qpid/linearstore/journal/JournalFile.h"
namespace qpid {
namespace linearstore {
namespace journal {
LinearFileController::LinearFileController(jcntl& jcntlRef) :
jcntlRef_(jcntlRef),
emptyFilePoolPtr_(0),
fileSeqCounter_("LinearFileController::fileSeqCounter", 0),
recordIdCounter_("LinearFileController::recordIdCounter", 0),
decrCounter_("LinearFileController::decrCounter", 0),
currentJournalFilePtr_(0)
{}
LinearFileController::~LinearFileController() {}
void LinearFileController::initialize(const std::string& journalDirectory,
EmptyFilePool* emptyFilePoolPtr,
uint64_t initialFileNumberVal) {
journalDirectory_.assign(journalDirectory);
emptyFilePoolPtr_ = emptyFilePoolPtr;
fileSeqCounter_.set(initialFileNumberVal);
}
void LinearFileController::finalize() {
if (currentJournalFilePtr_) {
currentJournalFilePtr_->close();
currentJournalFilePtr_ = 0;
}
while (!journalFileList_.empty()) {
delete journalFileList_.front();
journalFileList_.pop_front();
}
}
void LinearFileController::addJournalFile(JournalFile* journalFilePtr,
const uint32_t completedDblkCount,
const bool makeCurrentFlag) {
if (makeCurrentFlag && currentJournalFilePtr_) {
currentJournalFilePtr_->close();
currentJournalFilePtr_ = 0;
}
journalFilePtr->initialize(completedDblkCount);
{
slock l(journalFileListMutex_);
journalFileList_.push_back(journalFilePtr);
}
if (makeCurrentFlag) {
currentJournalFilePtr_ = journalFilePtr;
}
}
efpDataSize_sblks_t LinearFileController::dataSize_sblks() const {
return emptyFilePoolPtr_->dataSize_sblks();
}
efpFileSize_sblks_t LinearFileController::fileSize_sblks() const {
return emptyFilePoolPtr_->fileSize_sblks();
}
void LinearFileController::getNextJournalFile() {
if (currentJournalFilePtr_)
currentJournalFilePtr_->close();
pullEmptyFileFromEfp();
}
uint64_t LinearFileController::getNextRecordId() {
return recordIdCounter_.increment();
}
void LinearFileController::removeFileToEfp(const std::string& fileName) {
if (emptyFilePoolPtr_) {
emptyFilePoolPtr_->returnEmptyFileSymlink(fileName);
}
}
void LinearFileController::restoreEmptyFile(const std::string& fileName) {
// TODO: Add checks that this file is of a valid size; if not, delete this and get one from the EFP
addJournalFile(fileName, emptyFilePoolPtr_->getIdentity(), getNextFileSeqNum(), 0);
}
void LinearFileController::purgeEmptyFilesToEfp() {
slock l(journalFileListMutex_);
while (journalFileList_.front()->isNoEnqueuedRecordsRemaining() && journalFileList_.size() > 1) { // Can't purge last file, even if it has no enqueued records
emptyFilePoolPtr_->returnEmptyFileSymlink(journalFileList_.front()->getFqFileName());
delete journalFileList_.front();
journalFileList_.pop_front();
}
}
uint32_t LinearFileController::getEnqueuedRecordCount(const efpFileCount_t fileSeqNumber) {
return find(fileSeqNumber)->getEnqueuedRecordCount();
}
uint32_t LinearFileController::incrEnqueuedRecordCount(const efpFileCount_t fileSeqNumber) {
return find(fileSeqNumber)->incrEnqueuedRecordCount();
}
uint32_t LinearFileController::decrEnqueuedRecordCount(const efpFileCount_t fileSeqNumber) {
uint32_t r = find(fileSeqNumber)->decrEnqueuedRecordCount();
// TODO: Re-evaluate after testing and profiling
// This is the first go at implementing auto-purge, which checks for all trailing empty files and recycles
// them back to the EFP. This version checks every 100 decrements using decrCounter_ (an action which releases
// records). We need to check this rather simple scheme works for outlying scenarios (large and tiny data
// records) without impacting performance or performing badly (leaving excessive empty files in the journals).
if (decrCounter_.increment() % 100ULL == 0ULL) {
purgeEmptyFilesToEfp();
}
return r;
}
uint32_t LinearFileController::addWriteCompletedDblkCount(const efpFileCount_t fileSeqNumber, const uint32_t a) {
return find(fileSeqNumber)->addCompletedDblkCount(a);
}
uint16_t LinearFileController::decrOutstandingAioOperationCount(const efpFileCount_t fileSeqNumber) {
return find(fileSeqNumber)->decrOutstandingAioOperationCount();
}
void LinearFileController::asyncFileHeaderWrite(io_context_t ioContextPtr,
const uint16_t userFlags,
const uint64_t recordId,
const uint64_t firstRecordOffset) {
currentJournalFilePtr_->asyncFileHeaderWrite(ioContextPtr,
emptyFilePoolPtr_->getPartitionNumber(),
emptyFilePoolPtr_->dataSize_kib(),
userFlags,
recordId,
firstRecordOffset);
}
void LinearFileController::asyncPageWrite(io_context_t ioContextPtr,
aio_cb* aioControlBlockPtr,
void* data,
uint32_t dataSize_dblks) {
assertCurrentJournalFileValid("asyncPageWrite");
currentJournalFilePtr_->asyncPageWrite(ioContextPtr, aioControlBlockPtr, data, dataSize_dblks);
}
uint64_t LinearFileController::getCurrentFileSeqNum() const {
assertCurrentJournalFileValid("getCurrentFileSeqNum");
return currentJournalFilePtr_->getFileSeqNum();
}
uint64_t LinearFileController::getCurrentSerial() const {
assertCurrentJournalFileValid("getCurrentSerial");
return currentJournalFilePtr_->getSerial();
}
bool LinearFileController::isEmpty() const {
assertCurrentJournalFileValid("isEmpty");
return currentJournalFilePtr_->isEmpty();
}
const std::string LinearFileController::status(const uint8_t indentDepth) const {
std::string indent((size_t)indentDepth, '.');
std::ostringstream oss;
oss << indent << "LinearFileController: queue=" << jcntlRef_.id() << std::endl;
oss << indent << " journalDirectory=" << journalDirectory_ << std::endl;
oss << indent << " fileSeqCounter=" << fileSeqCounter_.get() << std::endl;
oss << indent << " recordIdCounter=" << recordIdCounter_.get() << std::endl;
oss << indent << " journalFileList.size=" << journalFileList_.size() << std::endl;
if (checkCurrentJournalFileValid()) {
oss << currentJournalFilePtr_->status_str(indentDepth+2);
} else {
oss << indent << " <No current journal file>" << std::endl;
}
return oss.str();
}
// --- protected functions ---
void LinearFileController::addJournalFile(const std::string& fileName,
const efpIdentity_t& efpIdentity,
const uint64_t fileNumber,
const uint32_t completedDblkCount) {
JournalFile* jfp = new JournalFile(fileName, efpIdentity, fileNumber, jcntlRef_.id());
addJournalFile(jfp, completedDblkCount, true);
}
void LinearFileController::assertCurrentJournalFileValid(const char* const functionName) const {
if (!checkCurrentJournalFileValid()) {
throw jexception(jerrno::JERR__NULL, "LinearFileController", functionName);
}
}
bool LinearFileController::checkCurrentJournalFileValid() const {
return currentJournalFilePtr_ != 0;
}
JournalFile* LinearFileController::find(const efpFileCount_t fileSeqNumber) {
if (currentJournalFilePtr_ && currentJournalFilePtr_->getFileSeqNum() == fileSeqNumber)
return currentJournalFilePtr_;
slock l(journalFileListMutex_);
for (JournalFileListItr_t i=journalFileList_.begin(); i!=journalFileList_.end(); ++i) {
if ((*i)->getFileSeqNum() == fileSeqNumber) {
return *i;
}
}
std::ostringstream oss;
oss << "fileSeqNumber=" << fileSeqNumber;
throw jexception(jerrno::JERR_LFCR_SEQNUMNOTFOUND, oss.str(), "LinearFileController", "find");
}
uint64_t LinearFileController::getNextFileSeqNum() {
return fileSeqCounter_.increment();
}
void LinearFileController::pullEmptyFileFromEfp() {
std::string efn = emptyFilePoolPtr_->takeEmptyFile(journalDirectory_); // Moves file from EFP only (ie no file init), returns new file name
addJournalFile(efn, emptyFilePoolPtr_->getIdentity(), getNextFileSeqNum(), 0);
}
}}}
|
