Nick Craig-Wood 07313554bf b2: reduce default chunk size to 16M and increase upload concurrency to 8 ...

The 96M default chunk size dates from 2016 when 100,000,000 bytes was
the minimum part size B2 allowed. The minimum is now 5,000,000 bytes.

Measurements against B2 EU on a 1 Gbit/s link show that each part has
a fixed overhead of about a second regardless of size, so throughput
is governed by chunk size multiplied by upload concurrency rather than
by chunk size alone. 16M chunks with concurrency 8 upload a 1 GiB file
as fast as 96M chunks with concurrency 4 while using a third of the
memory per transfer, and retry much less data when a part fails.

This also means that files between --multi-thread-cutoff and the chunk
size are no longer uploaded as a single part large file, which B2
rejects with "large files must have at least 2 parts", unless the
cutoff is set below 16M.

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commands

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oracleobjectstorage

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_index.md

s3: add Scality (RING / ARTESCA) provider

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alias.md

docs: modernize rclone.org site design

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amazonclouddrive.md

docs: modernize rclone.org site design

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archive.md

docs: modernize rclone.org site design

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authors.md

Add Dhevenddra K G to contributors

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azureblob.md

docs: fix duplicated words in vfs and backend documentation

2026-09-05 17:53:08 +01:00

azurefiles.md

docs: fix duplicated words in vfs and backend documentation

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b2.md

b2: reduce default chunk size to 16M and increase upload concurrency to 8

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backends.md

docs: serve backend metadata as JSON on the website

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bisync.md

docs: fix duplicated words in vfs and backend documentation

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box.md

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bugs.md

docs: fix markdownlint issues md007/ul-indent md004/ul-style

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cache.md

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changelog.md

Changelog updates from Version v1.75.1

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chunker.md

docs: modernize rclone.org site design

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cloudinary.md

docs: modernize rclone.org site design

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combine.md

docs: modernize rclone.org site design

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compress.md

docs: modernize rclone.org site design

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contact.md

docs: fix markdown lint issues in backend docs

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crypt.md

crypt: warn about directories with legacy version-like encrypted names

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docker.md

build: restrict the markdown languages to use for code blocks

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docs.md

docs: fix duplicated words in vfs and backend documentation

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doi.md

docs: modernize rclone.org site design

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downloads.md

docs: note macOS 10.15 (Catalina) support with version v1.70.3

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drime.md

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drive.md

docs: drive: document Branding step needed to publish own client_id

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dropbox.md

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faq.md

docs: fix formatting

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fichier.md

docs: modernize rclone.org site design

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filefabric.md

docs: modernize rclone.org site design

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filelu.md

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filen.md

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filescom.md

docs: modernize rclone.org site design

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filtering.md

filter: add --files-from0 to support NUL-delimited input - fixes #9537

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flags.md

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ftp.md

docs: modernize rclone.org site design

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gofile.md

docs: modernize rclone.org site design

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googlecloudstorage.md

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googlephotos.md

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gui.md

docs: take gui out of beta

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hasher.md

docs: modernize rclone.org site design

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hdfs.md

docs: modernize rclone.org site design

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hidrive.md

docs: modernize rclone.org site design

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http.md

docs: fix doubled words

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huaweidrive.md

docs: update Huawei Drive client ID setup

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iclouddrive.md

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imagekit.md

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install.md

build: update to go1.27 and make go1.26 the minimum required version

2026-08-20 12:16:48 +01:00

install.sh

install.sh: fix harmless error message on install

2023-11-28 19:10:04 +00:00

internetarchive.md

docs: modernize rclone.org site design

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internxt.md

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jottacloud.md

jottacloud: support whitelabel service Phonero Sky

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KEYS

docs: document release signing and verification

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koofr.md

docs: modernize rclone.org site design

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licence.md

docs: fix markdownlint issue md040/fenced-code-language

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linkbox.md

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local.md

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mailru.md

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mega.md

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memory.md

docs: modernize rclone.org site design

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netstorage.md

docs: modernize rclone.org site design

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onedrive.md

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opendrive.md

docs: modernize rclone.org site design

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overview.md

docs: fix typo

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pcloud.md

docs: modernize rclone.org site design

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pikpak.md

Version v1.74.0

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pixeldrain.md

docs: modernize rclone.org site design

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premiumizeme.md

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privacy.md

docs: update privacy policy with a section on user data

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protondrive.md

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putio.md

docs: modernize rclone.org site design

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qingstor.md

docs: modernize rclone.org site design

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quatrix.md

docs: modernize rclone.org site design

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rc.md

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release_signing.md

docs: change syntax hightlighting for command examples from sh to console

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remote_setup.md

docs: fix typo in remote setup docs

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s3.md

docs: fix broken links and wrong s3 directory bucket flag name

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seafile.md

Version v1.75.0

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sftp.md

docs: fix broken links and wrong s3 directory bucket flag name

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shade.md

docs: modernize rclone.org site design

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sharefile.md

docs: modernize rclone.org site design

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sia.md

docs: fix dead links in sia and storj backends

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smb.md

docs: modernize rclone.org site design

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sponsor.md

docs: update sponsors

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storj.md

docs: fix dead links in sia and storj backends

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sugarsync.md

docs: modernize rclone.org site design

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swift.md

docs: fix duplicated words in vfs and backend documentation

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tiers.md

docs: add tiering to the documentation - fixes #8873

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ulozto.md

docs: modernize rclone.org site design

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union.md

docs: modernize rclone.org site design

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webdav.md

webdav: fix SetModTime failing and hashes missing on Nextcloud

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yandex.md

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zoho.md

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