224 reputation
210
bio website
location London, United Kingdom
age
visits member for 3 years, 7 months
seen Sep 25 at 20:29

-


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?
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?
Oct
18
comment virtualization with multicast receive
Thx for your help!
Oct
14
comment virtualization with multicast receive
Thx! As I said I don't have another public IP for the virtual adapter so that solution won't work. If there were another IP I won't need the port forwarding..
Oct
13
comment virtualization with multicast receive
note: I don't have another network card and unfortunately I cannot get another public IP for the VM.
Oct
13
comment virtualization with multicast receive
by "works" I mean it works.... have you ever tried it? for example vmware player emulates an old network card which has no multicast support at all.
Sep
8
comment How should I burn in hard drives?
"Once you move the thing, you're back to where you started." - not true. this is how an MTTF graph for a disk looks like: cs.cmu.edu/~bianca/fast/img13.png cs.ucla.edu/classes/spring09/cs111/scribe/16/… testing in the early period can filter out a lot of problematic drives, manufacturers actually do these stress tests to make more reliable product but of course it's not economical to do the test till the graph flattens out.
Aug
16
comment shell record UDP stream from a specific address
firewall rule is an interesting idea, thx. I'll stick to the C program, as it's sounds more logic.
Aug
16
comment shell record UDP stream from a specific address
I want to feed a command line app with the stream...
Aug
8
comment Are there high availability cluster solutions for real-time TCP streaming?
This sounds immensely complex.. is it OK if the servers are not completely in-sync? How would the hot backup server know that at exactly which byte to continue sending the stream (for each client)?
Aug
2
comment Run Apache server as a different user
R U sure? what's the use case? file access?
Jul
12
comment Huge File System?
It would be better to directly link the "Distributed parallel fault-tolerant file systems"