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Message from discussion serverStatus() output in version 2.1+ contains a field called "."
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Eliot Horowitz  
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 More options May 10 2012, 2:39 pm
From: Eliot Horowitz <el...@10gen.com>
Date: Thu, 10 May 2012 14:39:55 -0400
Local: Thurs, May 10 2012 2:39 pm
Subject: Re: [mongodb-user] serverStatus() output in version 2.1+ contains a field called "."
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Yes - this will be changing in 2.2
(might already be in master)

What it is is for some server locks.
The whole stats structure is going to be changing in 2.1.2 to make it clearer.

On Thu, May 10, 2012 at 2:38 PM, Robert <rob...@objectlabs.com> wrote:
> I have a 2.1.1 mongod server and I've noticed that when I run
> serverStatus() there's a new field in the output called "locks".  The
> keys in the value of this field appear to be database names, but
> there's one key that's just ".".  First of all, what is this?  "show
> dbs" does not show a db called ".".  Secondly, if it's a sentinel
> value of some kind, would it be possible to use something other than
> "."?  We'd like to save away the output of serverStatus() as a
> document in mongo, but we can't if it has any fields containing "."

>> db.serverStatus()
> {
>        ...

>        "locks" : {
>                "." : {
>                        "timeLocked" : {
>                                "R" : NumberLong(0),
>                                "W" : NumberLong(59537457)
>                        },
>                        "timeAcquiring" : {
>                                "R" : NumberLong(29066607),
>                                "W" : NumberLong(17135484),
>                                "r" : NumberLong(269181),
>                                "w" : NumberLong(1779422)
>                        }
>                },
>                "admin" : {
>                        "timeLocked" : {
>                                "R" : NumberLong(0),
>                                "W" : NumberLong(1620572)
>                        },
>                        "timeAcquiring" : {
>                                "R" : NumberLong(522),
>                                "W" : NumberLong(64179)
>                        }
>                },
>                "local" : {
>                        "timeLocked" : {
>                                "R" : NumberLong(0),
>                                "W" : NumberLong(1620572)
>                        },
>                        "timeAcquiring" : {
>                                "R" : NumberLong(522),
>                                "W" : NumberLong(64179)
>                        }
>                },
>        ...
> }

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