How to get machine id

[Alex.yu]

In my application I have to decide the machine id before I use mongodb
id. How can I do that? Is it a part of the has of something that
uniquely identifies a machine?

[Kristina Chodorow]

If your driver follows the spec (all the official ones should), you can generate an ObjectId and the machine id will be the 9th-14th characters of its string representation.

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[Eliot Horowitz]

Just to clarify - are you writing your own driver or using an existing one?

If using an existing one, they should do this for you.

On Sun, Sep 5, 2010 at 8:08 AM, Alex.yu <vit...@gmail.com> wrote:

[Alex yu]

I know it's 9th-14th characters. What I really want to know is how mongodb calculate this 6 characters. So I can use it  even before
the emergence of mongodb id.

[Kyle Banker]

Here's how it's calculated in Ruby:

Digest::MD5.digest(Socket.gethostname)[0, 3]

All the other drivers will have a similar line of code.