224 reputation
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location London, United Kingdom
age
visits member for 3 years, 5 months
seen Jun 30 at 7:44

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Jan
2
awarded  Notable Question
Oct
21
awarded  Popular Question
Aug
15
asked Linux get CPU cache hit ratio
Aug
15
awarded  Editor
Aug
15
revised 100% uptime for a web application
added 2 characters in body
Aug
15
answered 100% uptime for a web application
Jan
8
awarded  Popular Question
Sep
7
comment How does a webserver handle a connection lost?
@John Gardeniers: let's assume I'm requesting a 1G file download from the webserver, and then I disconnect.. what do you think will happen?
Sep
6
comment How does a webserver handle a connection lost?
"The web server cannot even know if that browser is still listening or not, let alone care about it." - it does know and care about it, and will terminate that connection (= won't try to send more and it will free resources, etc).
Jul
24
comment Creating my small farm by virtual machines to learn scalability issues
it's hard to write down all the info you need. search for some blogs. and at any time focus only one part of the picture. http and mysql are completely separate things, and the solutions for load balancing those are completely different.
Jul
19
comment Are PHP session files ever deleted?
do you see old files?
Mar
9
awarded  Yearling
Jan
23
comment vm multicast doesn't work
As I wrote, I have identical VMs on other host machines, and there it works fine... since they are identical, they also should behave identical.. unless the outside environment (host configuration) differs. It just doesn't make sense to search for the problem in the VM.
Jan
23
asked vm multicast doesn't work
Oct
31
comment multicast tcpdump and subscriptions
sigh.. it's not re-writing. it's pretty natural that you can select the interface for (in/out) multicast traffic, as it is valid address on multiple interfaces. note: thanks for you help!
Oct
31
comment multicast tcpdump and subscriptions
O'rly? search for IP_ADD_MEMBERSHIP. here is one good source: tldp.org/HOWTO/Multicast-HOWTO-6.html (it was in my question BTW)
Oct
31
comment multicast tcpdump and subscriptions
I tested iperf, I cannot specify which interface to use so it sends the multicast joins on the wrong physical interface (no, I don't want to set up a route table entry for that)... couldn't test the rest, as usual, I'm waiting for the netadms :/
Oct
28
comment multicast tcpdump and subscriptions
.. so I set up the switch so it forwards all the multicast traffic.. now it arrives at my linux box, where the kernel will drop all those packets because apps haven't subscribed for the specific multicast addresses.. or have I misunderstood something?
Oct
28
comment multicast tcpdump and subscriptions
Also, as I said, if possible, I want to get all available multicast traffic. There are a lot of traffic and I don't know all the addresses.
Oct
28
comment multicast tcpdump and subscriptions
"You can generate an IGMP packet with a variety of tools.". What are these tools? I obviously don't want to manually assemble a packet.. iperf looks nice. What else can you use?