Kenneth Skovhede
ef36a9356b
This greatly increases performance because the database read is no longer preventing progress.
311 lines
18 KiB
C#
311 lines
18 KiB
C#
// Copyright (C) 2013, The Duplicati Team
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// http://www.duplicati.com, opensource@duplicati.com
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//
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// This library is free software; you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as
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// published by the Free Software Foundation; either version 2.1 of the
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// License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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using System;
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using System.Linq;
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using System.Collections.Generic;
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using Duplicati.Library.Main.Database;
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using Duplicati.Library.Main.Volumes;
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using System.Text;
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using System.Threading.Tasks;
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namespace Duplicati.Library.Main.Operation
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{
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internal class CompactHandler
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{
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protected string m_backendurl;
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protected Options m_options;
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protected CompactResults m_result;
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public CompactHandler(string backend, Options options, CompactResults result)
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{
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m_backendurl = backend;
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m_options = options;
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m_result = result;
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}
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public virtual void Run()
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{
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if (!System.IO.File.Exists(m_options.Dbpath))
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throw new Exception(string.Format("Database file does not exist: {0}", m_options.Dbpath));
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using(var db = new LocalDeleteDatabase(m_options.Dbpath, "Compact"))
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using(var backend = new BackendManager(m_backendurl, m_options, m_result.BackendWriter, db, m_result))
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{
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m_result.SetDatabase(db);
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Utility.UpdateOptionsFromDb(db, m_options);
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Utility.VerifyParameters(db, m_options);
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var changed = DoCompact(db, false, null);
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if (changed && m_options.UploadVerificationFile)
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FilelistProcessor.UploadVerificationFile(backend, m_options, m_result.BackendWriter, db);
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if (!m_options.Dryrun)
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{
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if (changed)
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{
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db.WriteResults();
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db.CommitTransaction("CommitCompact", false);
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if (m_options.AutoVacuum)
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{
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db.Vacuum();
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}
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}
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else
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db.CommitTransaction("CommitCompact", false);
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}
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else
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db.RollbackTransaction(false);
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}
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}
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internal bool DoCompact(LocalDeleteDatabase db, bool hasVerifiedBackend, BackendManager sharedBackend)
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{
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var report = db.GetCompactReport(m_options.VolumeSize, m_options.Threshold, m_options.SmallFileSize, m_options.SmallFileMaxCount);
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report.ReportCompactData(m_result);
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if (report.ShouldReclaim || report.ShouldCompact)
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{
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// Workaround where we allow a running backendmanager to be used
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using(var bk = sharedBackend == null ? new BackendManager(m_backendurl, m_options, m_result.BackendWriter, db, m_result) : null)
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{
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var backend = bk ?? sharedBackend;
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if (!hasVerifiedBackend && !m_options.NoBackendverification)
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FilelistProcessor.VerifyRemoteList(backend, m_options, db, m_result.BackendWriter);
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BlockVolumeWriter newvol = new BlockVolumeWriter(m_options);
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newvol.VolumeID = db.RegisterRemoteVolume(newvol.RemoteFilename, RemoteVolumeType.Blocks, RemoteVolumeState.Temporary);
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long blocksInVolume = 0;
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long discardedBlocks = 0;
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long discardedSize = 0;
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byte[] buffer = new byte[m_options.Blocksize];
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var remoteList = db.GetRemoteVolumes().Where(n => n.State == RemoteVolumeState.Uploaded || n.State == RemoteVolumeState.Verified).ToArray();
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//These are for bookkeeping
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var uploadedVolumes = new List<KeyValuePair<string, long>>();
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var uploadedIndexVolumes = new Dictionary<string, KeyValuePair<string, long>>();
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var deletedVolumes = new List<KeyValuePair<string, long>>();
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var downloadedVolumes = new List<KeyValuePair<string, long>>();
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//We start by deleting unused volumes to save space before uploading new stuff
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var fullyDeleteable = (from v in remoteList
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where report.DeleteableVolumes.Contains(v.Name)
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select (IRemoteVolume)v).ToList();
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deletedVolumes.AddRange(DoDelete(db, backend, fullyDeleteable));
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// This list is used to pick up unused volumes,
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// so they can be deleted once the upload of the
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// required fragments is complete
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var deleteableVolumes = new List<IRemoteVolume>();
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if (report.ShouldCompact)
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{
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Func<string, Task<IndexVolumeWriter>> indexCreator = null;
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if (m_options.IndexfilePolicy != Options.IndexFileStrategy.None)
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{
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indexCreator = async (name) => {
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var tmp = await Common.IndexVolumeCreator.CreateIndexVolume(name, m_options, backend.Database, null);
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// We assign to a dictionary, to prevent counting multiple items if the upload fails
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// and the index file is recreated
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uploadedIndexVolumes[name] = new KeyValuePair<string, long>(tmp.RemoteFilename, new System.IO.FileInfo(tmp.LocalFilename).Length);
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return tmp;
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};
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}
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var volumesToDownload = (from v in remoteList
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where report.CompactableVolumes.Contains(v.Name)
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select (IRemoteVolume)v).ToList();
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var dl = new AsyncDownloader(volumesToDownload, backend);
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using (var q = db.CreateBlockQueryHelper(m_options))
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{
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while(dl.MoveNext())
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{
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var entry = dl.Current;
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using (var tmpfile = entry.TempFile)
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{
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if (m_result.TaskControlRendevouz() == TaskControlState.Stop)
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{
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backend.WaitForComplete();
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return false;
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}
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downloadedVolumes.Add(new KeyValuePair<string, long>(entry.Name, entry.Size));
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var inst = VolumeBase.ParseFilename(entry.Name);
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using (var f = new BlockVolumeReader(inst.CompressionModule, tmpfile, m_options))
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{
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foreach (var e in f.Blocks)
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{
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if (q.UseBlock(e.Key, e.Value))
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{
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//TODO: How do we get the compression hint? Reverse query for filename in db?
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var s = f.ReadBlock(e.Key, buffer);
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if (s != e.Value)
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throw new Exception(string.Format("Size mismatch problem for block {0}, {1} vs {2}", e.Key, s, e.Value));
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newvol.AddBlock(e.Key, buffer, 0, s, Duplicati.Library.Interface.CompressionHint.Compressible);
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db.MoveBlockToNewVolume(e.Key, e.Value, newvol.VolumeID);
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blocksInVolume++;
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if (newvol.Filesize > m_options.VolumeSize)
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{
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uploadedVolumes.Add(new KeyValuePair<string, long>(newvol.RemoteFilename, newvol.Filesize));
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newvol.Close();
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if (!m_options.Dryrun)
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backend.Put(newvol, indexCreator);
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else
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m_result.AddDryrunMessage(string.Format("Would upload generated blockset of size {0}", Library.Utility.Utility.FormatSizeString(newvol.Filesize)));
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newvol = new BlockVolumeWriter(m_options);
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newvol.VolumeID = db.RegisterRemoteVolume(newvol.RemoteFilename, RemoteVolumeType.Blocks, RemoteVolumeState.Temporary);
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blocksInVolume = 0;
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//After we upload this volume, we can delete all previous encountered volumes
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deletedVolumes.AddRange(DoDelete(db, backend, deleteableVolumes));
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deleteableVolumes = new List<IRemoteVolume>();
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}
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}
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else
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{
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discardedBlocks++;
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discardedSize += e.Value;
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}
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}
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}
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deleteableVolumes.Add(entry);
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}
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}
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if (blocksInVolume > 0)
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{
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uploadedVolumes.Add(new KeyValuePair<string, long>(newvol.RemoteFilename, newvol.Filesize));
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newvol.Close();
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if (!m_options.Dryrun)
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backend.Put(newvol, indexCreator);
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else
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m_result.AddDryrunMessage(string.Format("Would upload generated blockset of size {0}", Library.Utility.Utility.FormatSizeString(newvol.Filesize)));
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}
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else
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{
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db.RemoveRemoteVolume(newvol.RemoteFilename);
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}
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}
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}
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deletedVolumes.AddRange(DoDelete(db, backend, deleteableVolumes));
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backend.WaitForEmpty();
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uploadedVolumes.AddRange(uploadedIndexVolumes.Values);
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var downloadSize = downloadedVolumes.Where(x => x.Value >= 0).Aggregate(0L, (a,x) => a + x.Value);
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var deletedSize = deletedVolumes.Where(x => x.Value >= 0).Aggregate(0L, (a,x) => a + x.Value);
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var uploadSize = uploadedVolumes.Where(x => x.Value >= 0).Aggregate(0L, (a,x) => a + x.Value);
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m_result.DeletedFileCount = deletedVolumes.Count;
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m_result.DownloadedFileCount = downloadedVolumes.Count;
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m_result.UploadedFileCount = uploadedVolumes.Count;
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m_result.DeletedFileSize = deletedSize;
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m_result.DownloadedFileSize = downloadSize;
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m_result.UploadedFileSize = uploadSize;
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m_result.Dryrun = m_options.Dryrun;
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if (m_result.Dryrun)
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{
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if (downloadedVolumes.Count == 0)
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m_result.AddDryrunMessage(string.Format("Would delete {0} files, which would reduce storage by {1}", m_result.DeletedFileCount, Library.Utility.Utility.FormatSizeString(m_result.DeletedFileSize)));
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else
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m_result.AddDryrunMessage(string.Format("Would download {0} file(s) with a total size of {1}, delete {2} file(s) with a total size of {3}, and compact to {4} file(s) with a size of {5}, which would reduce storage by {6} file(s) and {7}",
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m_result.DownloadedFileCount,
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Library.Utility.Utility.FormatSizeString(m_result.DownloadedFileSize),
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m_result.DeletedFileCount,
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Library.Utility.Utility.FormatSizeString(m_result.DeletedFileSize), m_result.UploadedFileCount,
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Library.Utility.Utility.FormatSizeString(m_result.UploadedFileSize),
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m_result.DeletedFileCount - m_result.UploadedFileCount,
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Library.Utility.Utility.FormatSizeString(m_result.DeletedFileSize - m_result.UploadedFileSize)));
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}
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else
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{
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if (m_result.DownloadedFileCount == 0)
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m_result.AddMessage(string.Format("Deleted {0} files, which reduced storage by {1}", m_result.DeletedFileCount, Library.Utility.Utility.FormatSizeString(m_result.DeletedFileSize)));
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else
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m_result.AddMessage(string.Format("Downloaded {0} file(s) with a total size of {1}, deleted {2} file(s) with a total size of {3}, and compacted to {4} file(s) with a size of {5}, which reduced storage by {6} file(s) and {7}",
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m_result.DownloadedFileCount,
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Library.Utility.Utility.FormatSizeString(downloadSize),
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m_result.DeletedFileCount,
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Library.Utility.Utility.FormatSizeString(m_result.DeletedFileSize),
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m_result.UploadedFileCount,
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Library.Utility.Utility.FormatSizeString(m_result.UploadedFileSize),
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m_result.DeletedFileCount - m_result.UploadedFileCount,
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Library.Utility.Utility.FormatSizeString(m_result.DeletedFileSize - m_result.UploadedFileSize)));
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}
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backend.WaitForEmpty();
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}
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m_result.EndTime = DateTime.UtcNow;
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return (m_result.DeletedFileCount + m_result.UploadedFileCount) > 0;
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}
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else
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{
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m_result.EndTime = DateTime.UtcNow;
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return false;
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}
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}
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private IEnumerable<KeyValuePair<string, long>> DoDelete(LocalDeleteDatabase db, BackendManager backend, IEnumerable<IRemoteVolume> deleteableVolumes)
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{
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// Mark all volumes as disposable
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foreach(var f in deleteableVolumes)
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db.UpdateRemoteVolume(f.Name, RemoteVolumeState.Deleting, f.Size, f.Hash);
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// Before we commit the current state, make sure the backend has caught up
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backend.WaitForEmpty();
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if (!m_options.Dryrun)
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db.CommitTransaction("AfterDeleteRemotes");
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return PerformDelete(backend, db.GetDeletableVolumes(deleteableVolumes));
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}
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private IEnumerable<KeyValuePair<string, long>> PerformDelete(BackendManager backend, IEnumerable<IRemoteVolume> list)
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{
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var res = new List<KeyValuePair<string, long>>();
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foreach(var f in list)
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{
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if (!m_options.Dryrun)
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backend.Delete(f.Name, f.Size);
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else
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m_result.AddDryrunMessage(string.Format("Would delete remote file: {0}, size: {1}", f.Name, Library.Utility.Utility.FormatSizeString(f.Size)));
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res.Add(new KeyValuePair<string, long>(f.Name, f.Size));
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}
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return res;
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}
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}
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}
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