Mail.ru Cloud
At a glance
Section titled “At a glance”| Capability | Support |
|---|---|
| rclone support tier | Tier 1: Core |
| Checksums | Mail.ru hash |
| Modification times | Kept, to 1 s |
| Case-insensitive names | Yes |
| Duplicate names allowed | No |
| Server-side copy | Yes |
| Server-side move and rename | Yes |
| Folder move and rename | Yes, in one step |
| Free space reporting | Yes |
| Empty folders | Yes |
| Change notifications | No |
| Uploads of unknown size | No |
| Public links | Yes |
Mail.ru Cloud is a cloud storage provided by a Russian internet company Mail.Ru Group. The official desktop client is Disk-O:, available on Windows and Mac OS.
Features highlights
Section titled “Features highlights”- Files have a
last modified timeproperty, directories don’t - Deleted files are by default moved to the trash
- Files and directories can be shared via public links
- Partial uploads or streaming are not supported, file size must be known before upload
- Maximum file size is limited to 2G for a free account, unlimited for paid accounts
- Storage keeps hash for all files and performs transparent deduplication, the hash algorithm is a modified SHA1
- If a particular file is already present in storage, one can quickly submit file hash instead of long file upload (this optimization is supported by rclone)
Setup notes
Section titled “Setup notes”In CloudMount you add this drive from the Add drive screen, and the wizard asks for the options listed under Options. The notes below come from rclone’s setup guide.
Modification times and hashes
Section titled “Modification times and hashes”Files support a modification time attribute with up to 1 second precision. Directories do not have a modification time, which is shown as “Jan 1 1970”.
File hashes are supported, with a custom Mail.ru algorithm based on SHA1. If file size is less than or equal to the SHA1 block size (20 bytes), its hash is simply its data right-padded with zero bytes. Hashes of a larger file is computed as a SHA1 of the file data bytes concatenated with a decimal representation of the data length.
Emptying Trash
Section titled “Emptying Trash”Removing a file or directory actually moves it to the trash, which is not
visible to rclone but can be seen in a web browser. The trashed file
still occupies part of total quota. If you wish to empty your trash
and free some quota, you can use the rclone cleanup remote: command,
which will permanently delete all your trashed files.
This command does not take any path arguments.
Quota information
Section titled “Quota information”To view your current quota you can use the rclone about remote:
command which will display your usage limit (quota) and the current usage.
Restricted filename characters
Section titled “Restricted filename characters”In addition to the default restricted characters set the following characters are also replaced:
| Character | Value | Replacement |
|---|---|---|
| “ | 0x22 | ＂ |
| * | 0x2A | ＊ |
| : | 0x3A | ： |
| < | 0x3C | ＜ |
| > | 0x3E | ＞ |
| ? | 0x3F | ？ |
| \ | 0x5C | ＼ |
| | | 0x7C | ｜ |
Invalid UTF-8 bytes will also be replaced, as they can’t be used in JSON strings.
Options
Section titled “Options”Standard options
Section titled “Standard options”The wizard asks for these when you add the drive.
client_id
Section titled “client_id”OAuth Client Id.
Leave blank normally.
Type: string
client_secret
Section titled “client_secret”OAuth Client Secret.
Leave blank normally.
Type: string
User name (usually email).
Type: string · Required
Password.
This must be an app password - rclone will not work with your normal password. See the Configuration section in the docs for how to make an app password.
NB Input to this must be obscured - see rclone obscure.
Type: string · Required
speedup_enable
Section titled “speedup_enable”Skip full upload if there is another file with same data hash.
This feature is called “speedup” or “put by hash”. It is especially efficient in case of generally available files like popular books, video or audio clips, because files are searched by hash in all accounts of all mailru users. It is meaningless and ineffective if source file is unique or encrypted. Please note that rclone may need local memory and disk space to calculate content hash in advance and decide whether full upload is required. Also, if rclone does not know file size in advance (e.g. in case of streaming or partial uploads), it will not even try this optimization.
Type: bool · Default: true
Choices:
true: Enablefalse: Disable
Advanced options
Section titled “Advanced options”The wizard shows these under Advanced options. Most drives work without changing any of them.
OAuth Access Token as a JSON blob.
Type: string
auth_url
Section titled “auth_url”Auth server URL.
Leave blank to use the provider defaults.
Type: string
token_url
Section titled “token_url”Token server url.
Leave blank to use the provider defaults.
Type: string
client_credentials
Section titled “client_credentials”Use client credentials OAuth flow.
This will use the OAUTH2 client Credentials Flow as described in RFC 6749.
Note that this option is NOT supported by all backends.
Type: bool · Default: false
speedup_file_patterns
Section titled “speedup_file_patterns”Comma separated list of file name patterns eligible for speedup (put by hash).
Patterns are case insensitive and can contain ‘*’ or ‘?’ meta characters.
Type: string · Default: *.mkv,*.avi,*.mp4,*.mp3,*.zip,*.gz,*.rar,*.pdf
Choices:
(empty): Empty list completely disables speedup (put by hash).*: All files will be attempted for speedup.*.mkv,*.avi,*.mp4,*.mp3: Only common audio/video files will be tried for put by hash.*.zip,*.gz,*.rar,*.pdf: Only common archives or PDF books will be tried for speedup.
speedup_max_disk
Section titled “speedup_max_disk”This option allows you to disable speedup (put by hash) for large files.
Reason is that preliminary hashing can exhaust your RAM or disk space.
Type: SizeSuffix · Default: 3Gi
Choices:
0: Completely disable speedup (put by hash).1G: Files larger than 1Gb will be uploaded directly.3G: Choose this option if you have less than 3Gb free on local disk.
speedup_max_memory
Section titled “speedup_max_memory”Files larger than the size given below will always be hashed on disk.
Type: SizeSuffix · Default: 32Mi
Choices:
0: Preliminary hashing will always be done in a temporary disk location.32M: Do not dedicate more than 32Mb RAM for preliminary hashing.256M: You have at most 256Mb RAM free for hash calculations.
check_hash
Section titled “check_hash”What should copy do if file checksum is mismatched or invalid.
Type: bool · Default: true
Choices:
true: Fail with error.false: Ignore and continue.
encoding
Section titled “encoding”The encoding for the backend.
See the encoding section in the overview for more info.
Type: Encoding · Default: Slash,LtGt,DoubleQuote,Colon,Question,Asterisk,Pipe,BackSlash,Del,Ctl,InvalidUtf8,Dot
description
Section titled “description”Description of the remote.
Type: string
Limitations
Section titled “Limitations”File size limits depend on your account. A single file size is limited by 2G for a free account and unlimited for paid tariffs. Please refer to the Mail.ru site for the total uploaded size limits.
Note that Mailru is case insensitive so you can’t have a file called “Hello.doc” and one called “hello.doc”.