Christoph, My reply's are inline: On Fri, Mar 15, 2013 at 9:29 PM, C. Scheeder <christ...@scheeder.de> wrote:
> Hi, > Summarizing up: > your clients have 100Mbit-Nics, > your server has a 1000Mbit-Nic, > you are not using a holdingdisk, so as far as i recall, > you are getting the maximum possible performance out of your setup. > Why? > without Holdingdisk, amanda will fetch all your dumps one after the other, > no matter what you set inparallel to in amada.conf. > As I had mention in last mail, I had doubt so I had remove its settings. But now I will use it. > > Or has that behavior changend for newer versions of amanda? > > You are limited by the speed of your client-nics, 100mBit/sec means max 11 > MByte/sec. > and as a short calculation this leads to roughly 3 to 4 days backup-time. > > if your NAS has a 1000Mbit-Nic, and if the systems are connected together > by a > 1GBit/sec switch then do yourself a favor and put a holdingdisk into your > server, > i would suggest a sata-disk with around 2 times the capacity of the > largest DLE you have. > It will cut Backuptime dramatically, as amanda will start dumping many > hosts in parallel. > > But if your nas only has a 100MBit NIC or you don't have a Gbit switch > you'll never get > amanda faster than now, nor any other backup solution. > True. About network limitation I do understand. But if these backup process will execute in parallel, then I will get expected "performance". I will use holding disk & test it again. Thanks a lot. > Hope that helps > Christoph > > Am 15.03.2013 07:41, schrieb Amit Karpe: > >> I am sharing her more Info: >> >> cpu usage >> >> On server (Intel® Xeon® series Quad core processors @ 2.66GHz) >> >> # ps -eo pcpu,pid,user,args | sort -r -k1 | head >> %CPU PID USER COMMAND >> 6.0 26873 33 /usr/bin/gzip --fast >> 4.3 26906 33 /usr/bin/gzip --fast >> 27.7 30002 ntop ntop >> 2.1 26517 33 dumper3 DailySet2 >> 2.1 26515 33 dumper1 DailySet2 >> 1.4 1851 root [nfsiod] >> 1.2 1685 nobody /usr/sbin/ns-slapd -D /etc/dirsrv/slapd-borneo -i >> /var/run/dirsrv/slapd-borneo.**pid -w /var/run/dirsrv/slapd-borneo.** >> startpid >> 1.0 27603 root ps -eo pcpu,pid,user,args >> 1.0 2135 root [nfsd] >> >> But on client is always 80%-90% cpu usage. So I am planning to use >> "compression server fast". >> >> >> parallel: >> Though I am using inparallel option in config file, I am not sure whether >> multiple dumper or other process running parallel or not ! >> inparallel 30 #performance >> maxdumps 5 #performance >> >> >> netusage: >> I read on forum that netusage is obsolete option, but still I have tried >> to >> play around from 8m to 8000m, but no grt success. What should it value >> for netusage >> ? If my server having NIC support for 1000 Mbps. >> >> maxdumps: >> I have changed it from one to five. How to make sure whether its working >> or >> not ? >> >> I have tested 15GB backup by changing above parameters for 50+ times. I >> see >> its improvement in performance only 5%. i.e. I reduce backup time from >> 18min to 15min. Can someone guide me to improve it further ? >> >> >> Client System: These normal ten workstation with 4GB RAM, Xeon duel core >> 2.5GHz, 100 Mbps NIC. >> Those having 200G to 800G data, but number of files are far more in >> numbers. >> Just to give idea: >> # find /disk1 | wc -l >> 647139 >> # df -h /disk1 >> Filesystem Size Used Avail Use% Mounted on >> /dev/cciss/c0d2 1.8T 634G 1.1T 37% /disk1 >> >> or >> # du -sh . >> 202G . >> # find | wc -l >> 707172 >> >> I have tried with amplot I have found these outputs: >> amdump.1<https://www.dropbox.**com/sh/qhh16izq5z43iqj/** >> hx6uplXRUp/20130315094305.ps<https://www.dropbox.com/sh/qhh16izq5z43iqj/hx6uplXRUp/20130315094305.ps> >> >& >> amdump.2<https://www.dropbox.**com/sh/qhh16izq5z43iqj/** >> 7IecwXLIUp/20130315105836.ps<https://www.dropbox.com/sh/qhh16izq5z43iqj/7IecwXLIUp/20130315105836.ps> >> > >> >> Sorry but I could not understand these plot. I think it just cover first >> one min information. >> >> Thank you all those you are helping and answering my dumb questions. >> >> > -- Regards Amit Karpe. http://www.amitkarpe.com/ http://news.karpe.net.in/
