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hadoop/hadoop-hdfs-project/hadoop-hdfs/CHANGES.HDFS-2802.txt

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/**
* 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.
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Branch-2802 Snapshot (Unreleased)
HDFS-4076. Support snapshot of single files. (szetszwo)
HDFS-4082. Add editlog opcodes for snapshot create and delete operations.
(suresh via szetszwo)
HDFS-4086. Add editlog opcodes to allow and disallow snapshots on a
directory. (Brandon Li via suresh)
HDFS-4083. Protocol changes for snapshots. (suresh)
HDFS-4077. Add support for Snapshottable Directory. (szetszwo via suresh)
HDFS-4087. Protocol changes for listSnapshots functionality.
(Brandon Li via suresh)
HDFS-4079. Add SnapshotManager which maintains a list for all the
snapshottable directories and supports snapshot methods such as setting a
directory to snapshottable and creating a snapshot. (szetszwo)
HDFS-4078. Handle replication in snapshots. (szetszwo)
HDFS-4084. Provide CLI support to allow and disallow snapshot
on a directory. (Brondon Li via suresh)
HDFS-4091. Add snapshot quota to limit the number of snapshots allowed.
(szetszwo)
HDFS-4097. Provide CLI support for createSnapshot. (Brandon Li via suresh)
HDFS-4092. Update file deletion logic for snapshot so that the current inode
is removed from the circular linked list; and if some blocks at the end of the
block list no longer belong to any other inode, collect them and update the
block list. (szetszwo)
HDFS-4111. Support snapshot of subtrees. (szetszwo via suresh)
HDFS-4119. Complete the allowSnapshot code and add a test for it. (szetszwo)
HDFS-4133. Add testcases for testing basic snapshot functionalities.
(Jing Zhao via suresh)
HDFS-4116. Add auditlog for some snapshot operations. (Jing Zhao via suresh)
HDFS-4095. Add some snapshot related metrics. (Jing Zhao via suresh)
HDFS-4141. Support directory diff - the difference between the current state
and a previous snapshot of an INodeDirectory. (szetszwo)
HDFS-4146. Use getter and setter in INodeFileWithLink to access blocks and
initialize root directory as snapshottable. (szetszwo)
HDFS-4149. Implement the disallowSnapshot(..) in FSNamesystem and add
resetSnapshottable(..) to SnapshotManager. (szetszwo)
HDFS-4147. When there is a snapshot in a subtree, deletion of the subtree
should fail. (Jing Zhao via szetszwo)
HDFS-4150. Update the inode in the block map when a snapshotted file or a
snapshot file is deleted. (Jing Zhao via szetszwo)
HDFS-4159. Rename should fail when the destination directory is snapshottable
and has snapshots. (Jing Zhao via szetszwo)
HDFS-4170. Add snapshot information to INodesInPath. (szetszwo)
HDFS-4177. Add a snapshot parameter to INodeDirectory.getChildrenList() for
selecting particular snapshot children list views. (szetszwo)
HDFS-4148. Disallow write/modify operations on files and directories in a
snapshot. (Brandon Li via suresh)
HDFS-4188. Add Snapshot.ID_COMPARATOR for comparing IDs and fix a bug in
ReadOnlyList.Util.binarySearch(..). (szetszwo)
HDFS-4187. Add tests for replication handling in snapshots. (Jing Zhao via
szetszwo)
HDFS-4196. Support renaming of snapshots. (Jing Zhao via szetszwo)
HDFS-4175. Additional snapshot tests for more complicated directory
structure and modifications. (Jing Zhao via suresh)
HDFS-4293. Fix TestSnapshot failure. (Jing Zhao via suresh)
HDFS-4317. Change INode and its subclasses to support HDFS-4103. (szetszwo)
HDFS-4103. Support O(1) snapshot creation. (szetszwo)
HDFS-4330. Support snapshots up to the snapshot limit. (szetszwo)
HDFS-4357. Fix a bug that if an inode is replaced, further INode operations
should apply to the new inode. (Jing Zhao via szetszwo)
HDFS-4230. Support listing of all the snapshottable directories. (Jing Zhao
via szetszwo)
HDFS-4244. Support snapshot deletion. (Jing Zhao via szetszwo)
HDFS-4245. Include snapshot related operations in TestOfflineEditsViewer.
(Jing Zhao via szetszwo)
HDFS-4395. In INodeDirectorySnapshottable's constructor, the passed-in dir
could be an INodeDirectoryWithSnapshot. (Jing Zhao via szetszwo)
HDFS-4397. Fix a bug in INodeDirectoryWithSnapshot.Diff.combinePostDiff(..)
that it may put the wrong node into the deleted list. (szetszwo)
HDFS-4407. Change INodeDirectoryWithSnapshot.Diff.combinePostDiff(..) to
merge-sort like and keep the postDiff parameter unmodified. (szetszwo)
HDFS-4098. Add FileWithSnapshot, INodeFileUnderConstructionWithSnapshot and
INodeFileUnderConstructionSnapshot for supporting append to snapshotted files.
(szetszwo)
HDFS-4126. Add reading/writing snapshot information to FSImage.
(Jing Zhao via suresh)
HDFS-4436. Change INode.recordModification(..) to return only the current
inode and remove the updateCircularList parameter from some methods in
INodeDirectoryWithSnapshot.Diff. (szetszwo)
HDFS-4429. When the latest snapshot exists, INodeFileUnderConstruction should
be replaced with INodeFileWithSnapshot but not INodeFile. (Jing Zhao
via szetszwo)
HDFS-4441. Move INodeDirectoryWithSnapshot.Diff and the related classes to a
package. (szetszwo)
HDFS-4432. Support INodeFileUnderConstructionWithSnapshot in FSImage
saving/loading. (Jing Zhao via suresh)
HDFS-4131. Add capability to namenode to get snapshot diff. (Jing Zhao via
suresh)
HDFS-4447. Refactor INodeDirectoryWithSnapshot for supporting general INode
diff lists. (szetszwo)
HDFS-4189. Renames the getMutableXxx methods to getXxx4Write and fix a bug
that some getExistingPathINodes calls should be getINodesInPath4Write.
(szetszwo)
HDFS-4361. When listing snapshottable directories, only return those
where the user has permission to take snapshots. (Jing Zhao via szetszwo)
HDFS-4464. Combine collectSubtreeBlocksAndClear with deleteDiffsForSnapshot
and rename it to destroySubtreeAndCollectBlocks. (szetszwo)
HDFS-4414. Add support for getting snapshot diff from DistributedFileSystem.
(Jing Zhao via suresh)
HDFS-4446. Support file snapshots with diff lists. (szetszwo)
HDFS-4480. Eliminate the file snapshot circular linked list. (szetszwo)
HDFS-4481. Change fsimage to support snapshot file diffs. (szetszwo)
HDFS-4500. Refactor snapshot INode methods. (szetszwo)
HDFS-4487. Fix snapshot diff report for HDFS-4446. (Jing Zhao via szetszwo)
HDFS-4431. Support snapshot in OfflineImageViewer. (Jing Zhao via szetszwo)
HDFS-4503. Update computeContentSummary(..), spaceConsumedInTree(..) and
diskspaceConsumed(..) in INode for snapshot. (szetszwo)
HDFS-4499. Fix file/directory/snapshot deletion for file diff. (Jing Zhao
via szetszwo)
HDFS-4524. Update SnapshotManager#snapshottables when loading fsimage.
(Jing Zhao via szetszwo)
HDFS-4520. Support listing snapshots under a snapshottable directory using ls.
(Jing Zhao via szetszwo)
HDFS-4514. Add CLI for supporting snapshot rename, diff report, and
snapshottable directory listing. (Jing Zhao via szetszwo)
HDFS-4523. Fix INodeFile replacement, TestQuota and javac errors from trunk
merge. (szetszwo)
HDFS-4507. Update quota verification for snapshots. (szetszwo)
HDFS-4545. With snapshots, FSDirectory.unprotectedSetReplication(..) always
changes file replication but it may or may not changes block replication.
(szetszwo)
HDFS-4557. Fix FSDirectory#delete when INode#cleanSubtree returns 0.
(Jing Zhao via szetszwo)
HDFS-4579. Annotate snapshot tests. (Arpit Agarwal via suresh)
HDFS-4574. Move Diff to the util package. (szetszwo)
HDFS-4563. Update namespace/diskspace usage after deleting snapshots.
(Jing Zhao via szetszwo)
HDFS-4144. Create test for all snapshot-related metrics.
(Jing Zhao via suresh)
HDFS-4556. Add snapshotdiff and LsSnapshottableDir tools to hdfs script.
(Arpit Agarwal via szetszwo)
HDFS-4534. Add INodeReference in order to support rename with snapshots.
(szetszwo)
HDFS-4616. Update the FilesDeleted metric while deleting file/dir in the
current tree. (Jing Zhao via szetszwo)
HDFS-4627. Fix FSImageFormat#Loader NPE and synchronization issues.
(Jing Zhao via suresh)
HDFS-4612. Not to use INode.getParent() when generating snapshot diff report.
(Jing Zhao via szetszwo)
HDFS-4636. Update quota usage when deleting files/dirs that were created
after taking the latest snapshot. (Jing Zhao via szetszwo)
HDFS-4648. For snapshot deletion, when merging the diff from to-delete
snapshot to the prior snapshot, make sure files/directories created after
the prior snapshot get deleted. (Jing Zhao via szetszwo)
HDFS-4637. INodeDirectory#replaceSelf4Quota may incorrectly convert a newly
created directory to an INodeDirectoryWithSnapshot. (Jing Zhao via szetszwo)
HDFS-4611. Update FSImage for INodeReference. (szetszwo)
HDFS-4647. Rename should call setLocalName after an inode is removed from
snapshots. (Arpit Agarwal via szetszwo)
HDFS-4684. Use INode id for image serialization when writing INodeReference.
(szetszwo)
HDFS-4675. Fix rename across snapshottable directories. (Jing Zhao via
szetszwo)
HDFS-4692. Use timestamp as default snapshot names. (szetszwo)
HDFS-4666. Define ".snapshot" as a reserved inode name so that users cannot
create a file/directory with ".snapshot" as the name. If ".snapshot" is used
in a previous version of HDFS, it must be renamed before upgrade; otherwise,
upgrade will fail. (szetszwo)
HDFS-4700. Fix the undo section of rename with snapshots. (Jing Zhao via
szetszwo)
HDFS-4529. Disallow concat when one of the src files is in some snapshot.
(szetszwo)
HDFS-4550. Refactor INodeDirectory.INodesInPath to a standalone class.
(szetszwo)
HDFS-4707. Add snapshot methods to FilterFileSystem and fix findbugs warnings.
(szetszwo)
HDFS-4706. Do not replace root inode for disallowSnapshot. (szetszwo)
HDFS-4717. Change the path parameter type of the snapshot methods in
HdfsAdmin from String to Path. (szetszwo)
HDFS-4708. Add snapshot user documentation. (szetszwo)
HDFS-4726. Fix test failures after merging the INodeId-INode mapping
from trunk. (Jing Zhao via szetszwo)
HDFS-4727. Update inodeMap after deleting files/directories/snapshots.
(Jing Zhao via szetszwo)
HDFS-4719. Remove AbstractINodeDiff.Factory and move its methods to
AbstractINodeDiffList. (Arpit Agarwal via szetszwo)
HDFS-4735. DisallowSnapshot throws IllegalStateException for nested
snapshottable directories. (Jing Zhao via szetszwo)
HDFS-4738. Changes AbstractINodeDiff to implement Comparable<Integer>, and
fix javadoc and other warnings. (szetszwo)
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