mongos graceful restart (-HUP)

[Oded Maimon]

Hi,

Is there a way to graceful restart mongos ?

so it will only clean the config data from memory and refetch it, but won't loos the sockets connected to it and from it?

thanks,

Oded.

[Dan Crosta]

If you just need to refresh the config data, you can run the
flushRouterConfig command:

mongos> db.adminCommand({flushRouterConfig: 1})

This will cause the mongos on which you run the command to re-fetch
the sharding metadata from the config server(s). It will not close
sockets that clients have open to the mongos, nor sockets the mongos
has open to shard servers.

- Dan

[Maimon Oded]

would you say that it is a good practice to run this once a day?

this week we had two critical issues that mongos restart solved.

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Oded.

[Dan Crosta]

It would depend on the nature of the issues, and what the underlying
causes are. Can you say more about what the two issues were, what
their symptoms were, etc?

- Dan

[Oded Maimon]

https://groups.google.com/forum/?fromgroups#!searchin/mongodb-user/from:me/mongodb-user/iNp2AhOELgQ/O_kliUemW7sJ 

https://groups.google.com/forum/#!msg/mongodb-user/ZHX9OVJyZ3I/kVQEF6VXybIJ

> > mongodb-user+unsubscribe@googlegroups.com.

[Dan Crosta]

Are you dropping and recreating (sharded) collections frequently? What
sorts of metadata changes are you making to your system (i.e. adding/
dropping databases, indexes, etc)?

- Dan


On May 7, 4:42 pm, Oded Maimon <oded.mai...@gmail.com> wrote:
> https://groups.google.com/forum/?fromgroups#!searchin/mongodb-user/fr...
>
> https://groups.google.com/forum/#!msg/mongodb-user/ZHX9OVJyZ3I/kVQEF6...

> > > > mongodb-user...@googlegroups.com.

[Oded Maimon]

Mostly creating new collections, creating indexes. We had few drop
collection but in the past.

Nothing that I wouldn't count as normal operation.. When we deploy a
version we sometimes have new collections or creating new indexes..

Sent from my iPhone