4722b94d1a
The sftp backend could be used as the source of a multi-thread copy - each chunk of a download is read on its own connection - but not as the destination, because it did not implement OpenWriterAt. Uploading a single large file was therefore limited to one connection while downloading the same file was not, capping upload throughput well below the link speed on high latency connections. This implements OpenWriterAt for the sftp backend using lib/filepool. A small pool of open write handles, each backed by its own connection, lets the core write the chunks of a large file concurrently over several connections. The file is created and truncated once up front so every chunk offset is valid before the concurrent writes start. Multi-thread uploads are off by default and turned on with the new --sftp-multithread-upload flag, since many sftp servers only accept sequential writes and would fail large uploads otherwise. Even when enabled they fall back to a single connection when --sftp-disable-concurrent-writes is set (a server that can't take out-of-order packets on one handle won't take several handles either) or when --sftp-connections caps the pool (the per-file fan-out would otherwise deadlock waiting on it). The OpenSSH test server (TestSFTPOpenssh) enables --sftp-multithread-upload so the feature is exercised in CI against a real server. Tested against OpenSSH: a single large upload over a high latency link went from ~12 MB/s to ~90 MB/s. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> Signed-off-by: Splainte <r.wycke@hotmail.fr>
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Rclone
Rclone ("rsync for cloud storage") is a command-line program to sync files and directories to and from different cloud storage providers.
Storage providers
- 1Fichier 📄
- Akamai Netstorage 📄
- Alibaba Cloud (Aliyun) Object Storage System (OSS) 📄
- Amazon S3 📄
- ArvanCloud Object Storage (AOS) 📄
- Bizfly Cloud Simple Storage 📄
- Backblaze B2 📄
- Box 📄
- Ceph 📄
- China Mobile Ecloud Elastic Object Storage (EOS) 📄
- Citrix ShareFile 📄
- Cloudflare R2 📄
- Cloudinary 📄
- Cubbit DS3 📄
- DigitalOcean Spaces 📄
- Digi Storage 📄
- Dreamhost 📄
- Drime 📄
- Dropbox 📄
- Enterprise File Fabric 📄
- Exaba 📄
- Fastly Object Storage 📄
- Fastmail Files 📄
- FileLu 📄
- Filen 📄
- Files.com 📄
- FlashBlade 📄
- FTP 📄
- GoFile 📄
- Google Cloud Storage 📄
- Google Drive 📄
- Google Photos 📄
- HDFS (Hadoop Distributed Filesystem) 📄
- Hetzner Object Storage 📄
- Hetzner Storage Box 📄
- HiDrive 📄
- Hitachi Content Platform (HCP) 📄
- HTTP 📄
- Huawei Cloud Object Storage Service(OBS) 📄
- Huawei Drive 📄
- iCloud Drive 📄
- ImageKit 📄
- Internet Archive 📄
- Internxt 📄
- Jottacloud 📄
- IBM COS S3 📄
- Impossible Cloud 📄
- Intercolo Object Storage 📄
- IONOS Cloud 📄
- Koofr 📄
- Leviia Object Storage 📄
- Liara Object Storage 📄
- Linkbox 📄
- Linode Object Storage 📄
- Magalu Object Storage 📄
- Mail.ru Cloud 📄
- Memset Memstore 📄
- MEGA 📄
- MEGA S4 Object Storage 📄
- Memory 📄
- Microsoft Azure Blob Storage 📄
- Microsoft Azure Files Storage 📄
- Microsoft OneDrive 📄
- Minio 📄
- Nextcloud 📄
- Blomp Cloud Storage 📄
- OpenDrive 📄
- OpenStack Swift 📄
- Oracle Cloud Storage 📄
- Oracle Object Storage 📄
- Outscale 📄
- OVHcloud Object Storage (Swift) 📄
- OVHcloud Object Storage (S3-compatible) 📄
- ownCloud 📄
- pCloud 📄
- Petabox 📄
- PikPak 📄
- Pixeldrain 📄
- premiumize.me 📄
- put.io 📄
- Proton Drive 📄
- QingStor 📄
- Qiniu Cloud Object Storage (Kodo) 📄
- Rabata Cloud Storage 📄
- Quatrix 📄
- Rackspace Cloud Files 📄
- RackCorp Object Storage 📄
- rsync.net 📄
- Scaleway 📄
- Scality (RING / ARTESCA) 📄
- Seafile 📄
- Seagate Lyve Cloud 📄
- SeaweedFS 📄
- Selectel Object Storage 📄
- Servercore Object Storage 📄
- SFTP 📄
- Shade 📄
- SMB / CIFS 📄
- Spectra Logic 📄
- Storj 📄
- SugarSync 📄
- Synology C2 Object Storage 📄
- Tencent Cloud Object Storage (COS) 📄
- Uloz.to 📄
- US3 Object Storage 📄
- Wasabi 📄
- WebDAV 📄
- Yandex Disk 📄
- Zadara Object Storage 📄
- Zero Services (ZERO-Z3) 📄
- Zoho WorkDrive 📄
- Zata.ai 📄
- The local filesystem 📄
Please see the full list of all storage providers and their features
Virtual storage providers
These backends adapt or modify other storage providers
- Alias: rename existing remotes 📄
- Archive: read archive files 📄
- Cache: cache remotes (DEPRECATED) 📄
- Chunker: split large files 📄
- Combine: combine multiple remotes into a directory tree 📄
- Compress: compress files 📄
- Crypt: encrypt files 📄
- Hasher: hash files 📄
- Union: join multiple remotes to work together 📄
Features
- MD5/SHA-1 hashes checked at all times for file integrity
- Timestamps preserved on files
- Partial syncs supported on a whole file basis
- Copy mode to just copy new/changed files
- Sync (one way) mode to make a directory identical
- Bisync (two way) to keep two directories in sync bidirectionally
- Check mode to check for file hash equality
- Can sync to and from network, e.g. two different cloud accounts
- Optional large file chunking (Chunker)
- Optional transparent compression (Compress)
- Optional encryption (Crypt)
- Optional FUSE mount (rclone mount)
- Multi-threaded downloads to local disk
- Can serve local or remote files over HTTP/WebDAV/FTP/SFTP/DLNA
Installation & documentation
Please see the rclone website for:
Downloads
License
This is free software under the terms of the MIT license (check the COPYING file included in this package).