Co-authored-by: Xiangwei Wei <526213833@qq.com>
Co-authored-by: Nqiaojialin <646274302@qq.com>

Change javdoc to block comment.

* rename modules

*  New Storage Engine. BufferwriteProcessor, OverflowProcessor, FileNodeProcessor and FileNodeManager are replaced by UnsealedTsFileProcessor, UnsealedTsFileProcessor, StorageGroupProcessor and StorageGroupManager.

* Async Flush Processor

* QueryDataSource is modified to adapt the new storage engine.

* Data dir is modified. TsFile.restore, FileNode.restore are discarded.

* a new tsfile summary file: tsfile.resource.

* Overflow file is isomorphic with Tsfile.

* A new chunk structure: TVList

* Each tsfile has a WAL file.

* Add some config parameters: memTableNumber, chunkBufferPoolEnable. 

* System_dir is discarded.

* [IOTDB-5]Deal with merge and other optimizations (#17)

add deletion function.

* fix IntervalFileNode

* fix a wrong branch in FileNodeManager

* some format refinements

* fix indent and equals() in Modification

1. modify asf header for each file; 2. enable apache-rat-plugin; 3. add more exclusive files on apache-rat-plugin and license-maven-plugin, i.e., *.json, *.md, and *.csv

* format Almost for obeying Google Java Style.

* fix the problem of checkstyle

* fix license-format template file location

* add apache header check plugin

* add fotmat plugin

* move format code to verify phase

* change to compile phase

* change to verify phase

* remove special char in .travis

* remove useless code

* add apach header and format codes

* Update MavenWrapperDownloader.java

* add comment in PageHeader

* add comment for TsFile, SeriesSchema, RecordUtils

* add pagereader comment

* add SeriesChunkReader comment

* replace SeriesReader by TimeValuePairReader

* add comment for class TsRowGroupBlockMetaData TsDeltaObject RowGroupMetaData

* add comment for QueryConfig, QueryEngine, QueryType

* translate a comment

* format

* change .ts to .tsfile

* add comment for QueryDataSet, OnePassQueryDataSet, Field, OldRowRecord, RowRecord

* recover ReadTest (not completed) and fix a neq filter bug

* update ReadTest

* fix a statistic bug and update ReadTest

* update read demo

* change RowGroupHeader to RowGroupFooter
update ReadTest

* add comment for IteratorOnePassQueryDataSet, TsPrimitiveType

* add comment for IteratorOnePassQueryDataSet, TsPrimitiveType

* add MetaMarker to distinguish RowGroupFooter and ChunkHeader

* fix one SerializedSize bug
add argument 'markerRead' in deserializeFrom()
some refinements

* fix one spelling miss

* add comment for FilterUtils

* to merge add_comment

* add cov plugin and comment for encoding

* update example

* fix all reviews

* fix reviews

* move the project into subfolder

* merge with master, and kill tsfile/interface

* add second level index for tsfile

* modify read process for usage of two level chunkgroup metadata

* code format and rename RowGroup to ChunkGroup, SeriesChunk to Chunk, DeltaObject to Device

* change delta object to device, row group to chunk group

* change deltaFileWriter to fileWriter

* fix ut test (for TsDeviceMetadataTest)

* remove the .travis.yml

* optimize ChunkLoaderImpl (#463)

* add Metadata Seperator

* remove hasNextChunkGroup in TsFileSequenceReader

* add TsFileIOWriterTest

* format

* add reset() for decoder

* delete

* replace InputStream by ByteBuffer in PageDataReader (#467)

* replace InputStream by ByteBuffer in PageDataReader

* remove visitor

* remove visitor in filter

* change Long to long in filter

* test

* remove unnecessary T

* fix issue 479：fix the bug caused by chunk cache loading (#481)

* fix the bug of #479  The number of result is wrong when using filter, which is caused by chunk cache loading

* replace readv2 to read, filterv2 to filter, and MeasurementDescriptor to MeasurementSchema in many classes' import clause. (#480)

* recover example

* change to long

* remove satisfy in SeriesFilter

* patch from write_thanos, for fix bug

* rename reader

* fix review

* change tsfile io output as an interface (#493)

* change tsfile io output as an interface

* add new TsFileIoWriter for incomplete file

* add  method

* add flush method to tsfileOutput

* replace TimeValuePair by BatchData (#491)

* read data in batch rather than one by one
* discard TsPrimitive class

* Timegenerator cache value optimization (#496)

optimize time generator and hasNext & next

* Move package (#497)

* Move the read and write packages out of the timeseries package.

* Rename class name *QueryFilter* to *Expression*.

* Move the filter package into the read package.

* Move the expression package out of the filter package.

* Move all exception classes into cn.edu.tsinghua.tsfile.exception.

* Update corresponding import in the IoTDB module.

* Classify the common and utils packages.

* fix the error in iotdb wal package; add processorexception

* on the way

* delete index package

* remove package error

* add utils

* add TimeValuePair, format package

* fix IExpression optimizer bug

* remove fill and groupby package, format package

* format package

* comment old aggregate and query code

* comment read analysis code

* remove overflow update operation package

* add transform filter operator to Expression

* remove useless class in engine/control and fix pacakge in serialize

* qp ok

* QueryProcessExecutor ordinary query ok

* format read

* add series reader

* modify read process

* modify priority reader, merge reader and SealedReader, UnSealedReader

* fix SealedTsFileReader, UnSealedTsFileReader

* update priority merge reader

* remove overflow chunk loader

* delete QueryWithoutFilterExecutorImpl

* format class code

* format code

* modify time generator

* Engine data set without time generator

* engine data set

* replace FileChannel in tsfileSequenceReader  as an interface

* remove unused import

* Write thanos (#514)

* fix timegenerator and reader code

* format code and doc

* fix tsfile import

* fix some import

* remove query

* add new class for reading unclosed TsFile

* adapt UnSealedTsFileReader

* update test in qp

* refactor overflow and filenode

* add fill

* resolve the error of filter

* delete generated codes by Thrfit

* fix FileNodeProcessor

* remove read package

* fix test

* delete interval tree test

* resolve all error in filenode

* fix error in tsfile metadata utils

* add jdbc support

* fix error in grafana

* fix error in iotdb src/main/

* fix all error

* modify the test for overflow and filenode

* fix test error

* delete some useless class

* fix test

* fix unit test

* fix test error

* modify the overflow test

* fix test

* delete fill feature

* add IFill again

* open limit and slimit in logical generator

* fix plan test

* format code

* change some TsFileWriter functions as private; add comments in MemSeriesLazeMerger; fix the return value in write() in BufferWriteProcessor

* fix bug when ReadWriteIOUtils.readAsPossible() read too much data. simplize read data by TsFileMetadataUtil in iotdb

* change some parameter type from IMemSeries to TimeValuePairSorter if the parameter is only used for read

* modifty some code for overflow test

* better organize the IMemSeries and RawSeriesChunk (#522)

* delete RawSeriesChunk, and change RawSeriesChunkLazyLoadImpl as ReadOnlyMemChunk

* rename IMemSeries to IWritableMemSeries, and PrimitiveMemSeries to WriableMemChunk

* remove the update and delete insert

* add javadoc of BufferWriteProcessor

* fix bug: add pre flush before write all chunk data into inputstream

* make read program avaliable

* add PriorityMergeReaderTest

* fix the bug caused by querying empty series

* modify the runing mode of test beautiful

* redesign when to generate ChunkGroupFooter (#526)

* fix read test

* fix read bug

* fix bug in read process

* add override for some class

* rename TestUitls to Constant

* fix read test

* fix problems due to alibaba java code

* remove test in IoTDBCompleteTest

* rename queryV2 package to query

* change Action Map from <string, object> to <string, Action>

* remove duplicated code in processor test

* add javadoc for BufferWriteProcessor

* add IoTDB query performance test

* format code, fix bug

* add TsFileDBConfig

* fix too many open files bug of UnSeqFileReader

* fix test

* perfect test

* fix query bug in UnSeqFile logic

* fix test error

* fix integration test error

* submit performance test file, this shoule be deleted later

* add ShowTimeseriesTest2

* perfect integration test

* add MinMaxTime filter

* remove performance package

* add override method for some class

* weaken the function of BufferWriteRestoreManager (#555)

* add file stream manager to avoid too many oopen files error

* add file stream manager for opened files

* fix error in logback.xml configuration

* Make TsFileSequenceReader concurrent safety. (#558)

* add functions in TsFile reader for supporting concurrent reading (thread safe )

* remove commented codes, and prevent logback from outputting its own status at the start of every log

* fix a bug

* Fix unsafed serialized size #486 (#487)

* fix #486 getSerializedSize()

* fix null point

* set reCalculateSerializedSize as private

* Add timing opened file reader manager (#561)

* merge master for clean ByteBuffer on high version JDK ( >1.8)

* BufferWrite: Combine BufferWriteIO with BufferWriterRestoreManager into one class (#566)

* delete SegmentInputStream and WithMMap

* remove directByteBuffer check in TsFile, because we never use it

* remove useless class (#570)

* Replace delta object usage with device (#571)

* remove tsfiledb to iotdb (#575)

* merge with master (remove Chinese in the code)