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From: "David S. Madole" <david@madole.net>
To: "Ensel Sharon" <user@dhp.com>,
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Date: Wed, 18 Jan 2006 13:21:43 -0500
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Subject: Re: tuning to run large (1000+) numbers of null_mounts
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From: "Ensel Sharon" <user@dhp.com>
>
> I am running over 2000 null mounts on a FreeBSD 6.0-RELEASE system.  I 
> am
> well aware of the status of the null_mount code, as advertised in the
> mount_nullfs man page:
>
> I am noticing both system instability and data corruption issues on 
> disk
> following crashes.  Both of these seem to be related to the null
> mounts.  I have two very quick questions:

For what it's worth, I have three null mounts on each of eight 
5.4-RELEASE systems that are read/write and have extensive activity and I 
have not had a single filesystem problem in 15 months of this 
configuration.

But 2000 of them? I don't know, I've never envisioned 2000 of any kind of 
mount.

David