Coda File System

Re: speculative questions

From: Ivan Popov <>
Date: Mon, 1 Apr 2002 11:37:25 +0200 (MET DST)
On Sun, 31 Mar 2002, Clark C . Evans wrote:

> Hello.  I've lightly read the documentation, and have a
> few questions (assume all servers are FreeBSD):
>   - Can coda do single server hard-disk replication (mirroring)?
>     Assume one server S, with three disks A, B, C and N
>     volumes.  Let disk A be used for the operating system,
>     configuration, and other items.  Let disk B and C be
>     the same size and used for data storage.
>     Question:  Can I replicate the N volumes across both
>     disk A and B so that if a disk goes down I'm still OK?

As long as you are running the same instance of the OS kernel,
i.e. inside the same physical host, you are better off using RAID.

Disk interface, SCSI or IDE, is a lot more effective than IP together with
all filesystem layers on top of it.

>     If Coda doesn't do single server replication (previous
>     quesiton) will it work with Vinum for RAID/MIRRORING?

I don't know what Vinum is, but I am running Coda servers on RAID -
it makes no remarkable performance difference.
Disk mirroring can even improve read performance.

Good luck,
Received on 2002-04-01 04:39:29