2010/6/8 Michal Nazarewicz <mina86@xxxxxxx>: >> 2010/6/8 Michal Nazarewicz <mina86@xxxxxxx>: >>> Are you sure it's not because of some NATing which may have a shorter >>> timeout then the one used by SSH's keep alive? > > query <query.cdac@xxxxxxxxx> writes: >> I am not 100% sure but during the connection dropout time , the CPU >> is 100% busy as shown >> by our own reporting utility. Reg NAT ing , I don't think so those >> hosts are behind NAT >> as there was no requirement like that for those hosts to access >> Internet . Anyway , I will >> confirm regarding this from the network-admin . >> >> P.S: Is there is any utility that can tell us whether we are behind >> NAT or not . > > If “ifconfig” on one host gives you different IP addresses then the > other host see as incoming IP then you are behind NAT. > Sorry , I failed to understand the above statement . But I have something in mind , I will try it tomorrow . >From the source machine , I send a packet to remote host on a different network . Now If I capture packet on the remote host and it comes out to be different ip address than the source host , then probably I am behind NAT. These hosts are having private ip address. Will it help to help me know whether I am behind NAT ? > There may be some other services that close the connection like > firewalls and some such. You should consult if there are any on the > path and whether thous could drop connections with your network > administrator. > > Also Glynn's suggestion of making keep alive timeout shorter may work. > > I find it hard to believe that high CPU usage could cause connection > dropping unless you have some *really* busy machine but then you should > consider upgrading hardware or rethinking what services those serves > provide. These hosts are not providing any Internet service and mainly responsible for processing around Gigabits of data . The processing continues for around 24 hours , During the processing , it utilizes around 100% CPU for around 4 hours and the connection drop happened during that time . Not sure what processig goes on during the time which takes all the CPU . The user we are talking here is the user under whom these processes runs . Hope it helps to understand the scenario . > > -- > Best regards, _ _ > .o. | Liege of Serenly Enlightened Majesty of o' \,=./ `o > ..o | Computer Science, Michal "mina86" Nazarewicz (o o) > ooo +--<mina86-tlen.pl>--<jid:mina86-jabber.org>--ooO--(_)--Ooo-- > Thanks Zaman -- To unsubscribe from this list: send the line "unsubscribe linux-admin" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
