[CentOS] Boot speed

Tue May 3 14:42:33 UTC 2011
m.roth at 5-cent.us <m.roth at 5-cent.us>

Les Mikesell wrote:
> On 5/3/2011 8:49 AM, Brunner, Brian T. wrote:
>>> So you save a second in boot time, then waste half an hour trying to
>>> figure out which wire goes to which network interface...   Doesn't
>>> sound like a win to me unless you only have one NIC.
>> I got one nic on one single-core non-PAE i586 CPU (GEODE LX800) that
>> roars at 800MHz with 1/4GB ram.  I got 1 hard drive with DMA, the
>> other "drive" is a CF socket accessed by PIO.
>> Look up the ETX boards, and consider those with 4 amps max total
>> current. They're used all over the world for process control and
>> special-situation comms systems.
>> It's headless, access is by ssh; it *must* go from power-on to full
>> operation in 90 seconds, it *should* get there in 30. That includes BIOS
>> startup. Once installed, it does NOT change hardware configuration
>> exception hard-drive-swap for application version upgrade every 2-3
>> years.
> If you've got one nic, it'a a pretty sure bet that any detection order
> is going to call it eth0.  Add a few more and I think you'll change your
> opinion, especially with that headless situation where all you can do is
> move wires until ssh works.  That's extra fun when you on the phone and
> paying by the hour for remote support.

*shrug* I don't have a lot of systems with more than one NIC, but I can
always do ethtool eth<whatever> till I see a link detected - that's a
matter of a minute or two, unless you've got a *lot* of ports.