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Subject: Re: could only be replicated to 0 nodes, instead of 1
From: Keith Wiley <kwiley@keithwiley.com>
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Date: Tue, 4 Sep 2012 20:41:19 -0700
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To: user@hadoop.apache.org

Good to know.  The bottom line is I was really short-roping everything =
on resources.  I just need to jack the machine up some.

Thanks.

On Sep 4, 2012, at 19:41 , Harsh J wrote:

> Keith,
>=20
> The NameNode has a resource-checker thread in it by design to help
> prevent cases of on-disk metadata corruption in event of filled up
> dfs.namenode.name.dir disks, etc.. By default, an NN will lock itself
> up if the free disk space (among its configured metadata mounts)
> reaches a value < 100 MB, controlled by
> dfs.namenode.resource.du.reserved. You can probably set that to 0 if
> you do not want such an automatic preventive measure. Its not exactly
> a need, just a check to help avoid accidental data loss due to
> non-monitoring of disk space.
>=20
> On Tue, Sep 4, 2012 at 11:33 PM, Keith Wiley <kwiley@keithwiley.com> =
wrote:
>> I had moved the data directory to the larger disk but left the =
namenode directory on the smaller disk figuring it didn't need much =
room.  Moving that to the larger disk seems to have improved the =
situation...although I'm still surprised the NN needed so much room.
>>=20
>> Problem is solved for now.
>>=20
>>=20
>> Thanks.
>> =
__________________________________________________________________________=
______
>> Keith Wiley     kwiley@keithwiley.com     keithwiley.com    =
music.keithwiley.com
>>=20
>> "I used to be with it, but then they changed what it was.  Now, what =
I'm with
>> isn't it, and what's it seems weird and scary to me."
>>                                           --  Abe (Grandpa) Simpson
>> =
__________________________________________________________________________=
______
>>=20
>=20
>=20
>=20
> --=20
> Harsh J


=
__________________________________________________________________________=
______
Keith Wiley     kwiley@keithwiley.com     keithwiley.com    =
music.keithwiley.com

"You can scratch an itch, but you can't itch a scratch. Furthermore, an =
itch can
itch but a scratch can't scratch. Finally, a scratch can itch, but an =
itch can't
scratch. All together this implies: He scratched the itch from the =
scratch that
itched but would never itch the scratch from the itch that scratched."
                                           --  Keith Wiley
=
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