Re: No swap on my Debian Sid system
On Monday 23 Jan 2006 10:37, Gilles wrote:
> The idea is that if one disk fails, and the swap on that one is corrupted,
> the system will crash...
And that is *good* -- a crashed system has to be dealt with there and then,
and is not going to keep limping along, possibly making matters slowly worse
and worse; as I have seen happen in practice with old, legacy systems. After
all, if your swap partition is corrupt, how do you know it's the only thing?
While I think it's generally good to keep a server up as long as possible, I
also believe there are times when it needs to come down for damage
limitation.
> > With the kind of hardware RAID that appears as a single
> > SCSI drive, you obviously can't avoid RAIDing swap; but at least it isn't
> > such a performance hit.
> Some people have pointed out that linux's software RAID is probably more
> efficient then the common cheap (fake) hardware RAID.
Indeed; but I was talking about expensive, true hardware RAID. If your "RAID
controller" is not really a RAID controller, then by all means use md.
> On my system (using "mdadm"):
>
> # ls /etc/raidtab
> ls: /etc/raidtab: No such file or directory
The configuration file might well have moved since I last set up an md RAID
system ..... that's the thing to beware of with any reliable system; the
construction often outlasts the design. As always, check your own setup and
make appropriate substitutions.
--
AJS
delta echo bravo six four at earthshod dot co dot uk
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