| Name | Summary |
|---|---|
|
Add a shard to a database.Example: .
|
|
|
Authentication: creates a
user for the given db.
|
|
|
Perform on the "admin" database. *
|
|
|
Authenticate a user for the given database.The password must match the users password.
|
|
|
Authenticate low-level, needed by the driver during reconnect (and reauthenticate).
|
|
|
Return information about the server.
|
|
|
Predicate for connection alive. Peforms an admin "ping" command.
We insist upon a single reply, an...
|
|
|
Return collection statistics.Example:
|
|
|
Perform on the "config" database. *
|
|
|
Cap a collection. Example:
|
|
|
Count the number of matching elements. returns the number of elements
matching or the whole collect...
|
|
|
Create a collection.
|
|
|
Run a but pass the result through ,
using the type that this function is cast to at the point of ca...
|
|
|
MongoDB aggregation.Example:
|
|
|
Drop a collection from a database
|
|
|
Drop a database.
|
|
|
Drop an index from a collection
|
|
|
Enable sharding on the given database.
|
|
|
Evaluate Javascript code.Example:
|
|
|
Atomic operation, perform query and update document if found.
This is a generic version, you can onl...
|
|
|
Same as but convert to OPA type *
|
|
|
Remove-specific version of the command *
|
|
|
Same as but convert to OPA type *
|
|
|
Update-specific version of the command *
|
|
|
Same as but convert to OPA type *
|
|
|
Query the "config.locks" database, gives information about the shard balancer.
|
|
|
Query the "config.chunks" database, gives a information about shard distribution.
|
|
|
Query the "config.databases" database, gives a list of shard information about databases.
|
|
|
Query the "config.shards" database, gives a list of shards.
|
|
|
Find a non-draining shard in a list of shards.
You get the list of shards from the "config.shards" c...
|
|
|
Force a db error.
|
|
|
Return the last error from database.
|
|
|
Return the last error from database, with full options.Example:
|
|
|
Return the current shard version for this collection.
|
|
|
A more advanced aggregation function.Example:
|
|
|
Runs an "isdbgrid" command. Can be used to tell if we are running mongos or mongod.
|
|
|
command result as a .
|
|
|
Return the document as an OPA type.
|
|
|
Boolean predicate for connection to a mongos (uses ).
|
|
|
Predicate for master status. Runs an "ismaster" command.
|
|
|
List valid commands for database.
|
|
|
List all databases.
|
|
|
Return a list of shards.
|
|
|
Abbreviation for mapReduceOpts *
|
|
|
A bare no-frills mapReduce function. We ask for all of the options, including
the complicated "out"...
|
|
|
Convert the return value from mapReduce into an OPA type.
Probably not very useful since mapReduce o...
|
|
|
Default options for , all .
|
|
|
Full mapReduce but handling options with the type.
|
|
|
Same as but returns OPA type. *
|
|
|
Simplest possible mapReduce, only define , and .
|
|
|
Same as but returns OPA type. *
|
|
|
Move a chunk from the given collection for which the select document would
select a document from an...
|
|
|
Move the primary for the given db name to the named shard.
Example:
|
|
|
Update the balancer settings, =stopped
|
|
|
Presplit, we just define the split point (does a split(middle)).
Example:
|
|
|
Complicated and possibly dangerous routine.
We remove a shard and detect whether it has completed or...
|
|
|
Basic and practically useless remove shard command.
Unless the shard happens to have no databases in...
|
|
|
Rename a collection
|
|
|
Repair the database (slow, write-locked).
|
|
|
Reset database error status.
|
|
|
Run a "$cmd" command.Normally you will get as a reply but sometimes there
are other elements in the...
|
|
|
Statistics for server.
|
|
|
Low-level, set "config.settings" balancer value. Valid objects are "stopped" and "start/stop".
|
|
|
Set balancer window (eg. start="09:00" stop="21:00")
|
|
|
Set chunksize in MB.
|
|
|
Enable sharding on a collection, giving the optional sharding key.
The bool is the unique flag.Examp...
|
|
|
Perform a simple integer command, eg.
|
|
|
Same as simple integer command but with options, eg.
|
|
|
Perform a simple integer command, eg.
|
|
|
Perform a simple integer command, eg.
|
|
|
Actually split an existing chunk (does a split(find)).
Example:
|
Markdown Syntax Help
You can enter a message using a Markdown-like syntax. Here is a list of all elements recognized.
Paragraph
A group of text isolated by two or more linebreaks will be put in a HTML paragraph <p>.
Titles
You can enter titles using various syntax:
First level title =================
will create:
First level title
and
Second level title ------------------
will create:
Second level title
You can also create titles by preceding text with as many # as the
level of the title, so
#### Title 4
will create:
Title 4
Emphasis
You may want to put emphasis on some words in your texts.
You can do a simple emphasis by surrounding some text with
* or _: *text* will give in result *text*.
To put a strong emphasis on something, you can surround it with
** or __: __text__ will give in result text.
You can put *a **strong emphasis** inside a simple one* or __a _simple emphasis_ inside a strong one__.
Lists
You can insert simple bullet lists simply by putting each element in
a line starting by a -, a + or a *. Mixing symbols will not create
different lists unless there is a blank line in the middle:
- one - two
* three + four
will result in:
- one
- two
- three
- four
If you want to put a linebreak in your source to avoid very long lines, you can put four spaces or a tabulation at the beginning of your line to keep the content as one list element:
- one
two
- three
four
will result in:
- one two
- three four
To insert numbered lists, you can follow the same rules and start your lines with a number followed by a period. The numbers do not have to follow a logical suit to be recognized:
1. one
two
3. three
42. four
444. five
will result in:
- one two
- three
- four
- five
Links
You can insert links inside your text in two ways:
some text [Inline-style](https://mlstate.com "MLstate") more text or some text [Reference-style][mlstate] some random text [mlstate]: https://mlstate.com "MLstate"
In both cases, the title ("MLstate") is optional. The result of the above is:
some text Inline-style more text or some text Reference-style some random text
Note that references are case-sensitive and can be used for several links.
Images
Image insertion uses the same syntax than inserting links preceded by a !:
 ![HTML5][html5] [html5]: http://www.w3.org/html/logo/badge/html5-badge-h-solo.png "HTML5"
both result in:
You can use the same reference for a link and an image (referencing the same URL).
Code
There are two ways of inserting code inside your text.
Firstly, you can surround it with `, so `some code` will
result in some code.
You can also indent a paragraph with at least four spaces or a tabulation:
rec fact(x) =
if x < 1 then 1
else x * fact(x-1)
will result in:
rec fact(x) = if x < 1 then 1 else x * fact(x-1)
Quote
You can insert a quote in you texts by preceding it with >. You
can put a quote inside a quote:
> > An indented quote > A standard quote
will result in:
An indented quote
A standard quote
Other
You can insert an html line break (<br/>) by putting two spaces at
the end of the line.
You can insert a horizontal line by writing a line containing only
the character - preceded by an empty line (otherwise it would result
in a second-level header).
-------------- Some text with a linebreak
will result in:
Some text with a linebreak
You can enter a message using a Markdown-like syntax.
Here is a list of all elements recognized.
## Paragraph
A group of text isolated by two or more linebreaks will be put
in a HTML paragraph <p>.
## Titles
You can enter titles using various syntax:
First level title
=================
will create:
First level title
=================
and
Second level title
------------------
will create:
Second level title
-----------------
You can also create titles by preceding text with as many `#` as the
level of the title, so
#### Title 4
will create:
#### Title 4
## Emphasis
You may want to put emphasis on some words in your texts.
You can do a *simple emphasis* by surrounding some text with
`*` or `_`: `*text*` will give in result *text*.
To put a **strong emphasis** on something, you can surround it with
`**` or `__`: `__text__` will give in result __text__.
You can put *a **strong emphasis** inside a simple one* or
__a _simple emphasis_ inside a strong one__.
## Lists
You can insert simple bullet lists simply by putting each element in
a line starting by a `-`, a `+` or a `*`. Mixing symbols will not create
different lists unless there is a blank line in the middle:
- one
- two
* three
+ four
will result in:
- one
- two
* three
+ four
If you want to put a linebreak in your source to avoid very long lines, you
can put four spaces or a tabulation at the beginning of your line to keep the
content as one list element:
- one
two
- three
four
will result in:
- one
two
- three
four
To insert numbered lists, you can follow the same rules and start your lines
with a number followed by a period. The numbers do not have to follow a logical
suit to be recognized:
1. one
two
3. three
42. four
444. five
will result in:
1. one
two
3. three
42. four
444. five
## Links
You can insert links inside your text in two ways:
some text [Inline-style](https://mlstate.com "MLstate") more text
or
some text [Reference-style][mlstate] some random text
[mlstate]: https://mlstate.com "MLstate"
In both cases, the title `("MLstate")` is optional. The result of the above is:
some text [Inline-style](https://mlstate.com "MLstate") more text
or
some text [Reference-style][mlstate] some random text
[mlstate]: https://mlstate.com "MLstate"
Note that references are case-sensitive and can be used for several links.
## Images
Image insertion uses the same syntax than inserting links preceded by a `!`:
![HTML5][html5]
[html5]: http://www.w3.org/html/logo/badge/html5-badge-h-solo.png "HTML5"
both result in:
![HTML5][html5]
[html5]: http://www.w3.org/html/logo/badge/html5-badge-h-solo.png "HTML5"
You can use the same reference for a link and an image (referencing the same URL).
## Code
There are two ways of inserting code inside your text.
Firstly, you can surround it with `\``, so `\`some code\`` will
result in `some code`.
You can also indent a paragraph with at least four spaces or a tabulation:
rec fact(x) =
if x < 1 then 1
else x * fact(x-1)
will result in:
rec fact(x) =
if x < 1 then 1
else x * fact(x-1)
## Quote
You can insert a quote in you texts by preceding it with `>`. You
can put a quote inside a quote:
> > An indented quote
> A standard quote
will result in:
> > An indented quote
> A standard quote
## Other
You can insert an html line break (`<br/>`) by putting two spaces at
the end of the line.
You can insert a horizontal line by writing a line containing only
the character `-` preceded by an empty line (otherwise it would result
in a second-level header).
--------------
Some text
with a linebreak
will result in:
--------------
Some text
with a linebreak
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