Mathematics

Associated with Math.SE; for both general discussion & math qu...
Sep 22, 2013 13:05
not dividing
Sep 22, 2013 13:05
it is the equivalent of ANDing a number with zero
Sep 22, 2013 13:05
@cyberskull CIDR Notation, dear
 

 The Comms Room

ServerFault's lobby
Aug 23, 2013 01:58
the vast majority of the core netfilter code is reused in nftables
Aug 23, 2013 01:58
uh, most of it
Aug 23, 2013 01:48
of course, nftables isn't too far away now
Aug 23, 2013 01:47
@MichaelHampton this is why ipset exists
Aug 20, 2013 09:21
yeah, I have to agree
Aug 20, 2013 09:17
ok, I'm listening, what's the death knell?
Aug 20, 2013 09:16
and really, it's always been that way
Aug 20, 2013 09:16
in practice, if you hang around with the wrong people, you're going to be surveilled
Aug 20, 2013 09:16
@FalconMomot you still have freedom of association in principle
Aug 20, 2013 08:29
looks like you're up to your elbows in here
Aug 20, 2013 08:29
oh, it's one of those mornings
Aug 16, 2013 01:05
this is how @Zoredache got banned from the supermarket: i.imgur.com/VjM8nau.jpg
Aug 16, 2013 00:46
Dangerous commands - I.T. Darwinism at its finest.
Aug 16, 2013 00:45
one gets you fired ;)
Aug 16, 2013 00:45
it's like switchport trunk allow vlan 1234 versus switchport trunk allow vlan add 1234
Aug 16, 2013 00:43
@Wesley it sorts the men from the boychiks
Aug 16, 2013 00:42
banging eh?
Aug 16, 2013 00:30
I'm going to be really mean here and say "read the manpage dude"
Aug 16, 2013 00:18
Bad Times.
Aug 16, 2013 00:18
runs ip rou flush all instead of ip rou flush cache
Aug 16, 2013 00:18
tech was apparently seeing routing weirdness on a database server
Aug 16, 2013 00:18
oh this is gold
Aug 15, 2013 14:40
hurr hurr
Aug 15, 2013 14:39
what sort of drives are in the array?
Aug 15, 2013 14:39
jeez, that was comic gold, go cPanel yourselves :(
Aug 15, 2013 14:38
MothercPaneling cPaneler
Aug 15, 2013 14:37
What the cPanel?
Aug 15, 2013 14:37
looks at starred comments
Aug 15, 2013 14:35
odds of a drive having a few bad sectors aren't too low, odds of the entire drive fucking itself during rebuild? not hugely likely either
Aug 15, 2013 14:35
unless you're in a situation where you can't even tolerate a single stripe being lost
Aug 15, 2013 14:34
RAID 5 is just fine, if you have a sufficiently low number of drives and can rebuild in a reasonable space of time
Aug 15, 2013 14:32
really comes down to density and number of drives, as well as your storage goals
Aug 15, 2013 14:31
if you're using drives ALL from the same batch with a large quantity of them, RAID6 could well be insufficient
Aug 15, 2013 14:31
it gives you 1 additional disk's worth of resilience
Aug 15, 2013 14:30
osnap
Aug 15, 2013 14:29
and if you've got a small scale array, assuming all the drives aren't from the same manufacturer/batch, the odds of another failing during rebuild aren't that high
Aug 15, 2013 14:29
you've lost a stripe
Aug 15, 2013 14:29
if the drive just gets a single bad sector
Aug 15, 2013 14:29
if a drive chokes during rebuild, sure
Aug 15, 2013 14:28
if I have a 4 drive RAID 5, the odds of a bad sector at rebuild are lower than a 20 drive RAID 5
Aug 15, 2013 14:28
@TomO'Connor sure it does, it affects the probability of a bad sector when rebuilding
Aug 15, 2013 14:27
if you hit a bad sector when rebuilding, you lost that sector
Aug 15, 2013 14:27
and lose "all" your data is a bit of a stretch
Aug 15, 2013 14:27
@TomO'Connor depends how many drives you've got...
Aug 15, 2013 12:44
Netware? Lawdy lawd
Aug 15, 2013 12:43
shudders
Aug 15, 2013 12:40
god I hope that's literal and not a euphemism