fs optimisation

[Julian Elischer]

When the filesystem becomes more full, the policy code changes to a
differnt algorythm that uses space more efficiently but
results in files being more fragmented (and thus slower to access)
When there is more space again, it goes back to the method that allocates
blocks efficiently for speed, but wastes a small amount of space.

The icmp message is a new feature that limits the numbeer of icmp messages
that the system will respond per second.
this is to stop a Denial of service  attack where the system is forced to
be busy sending thousands of icmp redirect or reject packets.

szia

julian


On Tue, 16 Feb 1999, Peter Czanik wrote:

> Hello,
> 	Mi a fenet jelent a kovetkezo kerneluzenet:
> /usr/local: optimization changed from TIME to SPACE
> /usr/local: optimization changed from SPACE to TIME
> /usr/local: optimization changed from TIME to SPACE
> 	Mindig akkor jelent meg, amikor kicsit tobb file muveletet
> hajtottam vegre a hdd-n (legutobb egy csomo torles...).
> 	Van egy masik kedvencem is:
> icmp-response bandwidth limit 101/100 pps
> 	Akkor irja ki, amikor portscanelik a gepet: legalabb 2-3 perc
> leportscanelni, mert ahogy eszreveszi a kernel, akkor lekorlatozza a
> valaszcsomagok szamat... ;) Bye,
> 
> Peter Czanik			GAU Faculty of Agriculture
> czanik at fang.fa.gau.hu		http://fang.fa.gau.hu/~czanik/
> 
>