Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
Hi, On Tue, 23 Oct 2007 14:52:33 -0400 (EDT) Nate Seif <seifn at rstechnicalservices.com> wrote: > Identify where the bottleneck is to [possibly] get faster sync speeds: > (1) Check to make sure your kernel has proper [driver] support for > your chipset. Run 'lspci' to get info about what chipset you have if > you don't already know. I have support, and i have full support for the device. > (2) Make sure you have DMA enabled for your hard drives. Research > first, then run 'hdparm' to test write speeds to see if hard drives > are the bottleneck. DMA in my case, have nothing to do with it, it's SAS device. > (3) Check your network: can you get faster transfer speeds with other > app's? Make sure you've got the proper drivers for your NIC's... I get much faster transfer on my NIC's, yes, i have tested with iperf. > > Good luck. Thanks. > > Nate > > > On Tue, 23 Oct 2007, Igor Neves wrote: > > > Hi, > > > > I'm having problems with sync, using drbd 8.0.4, in centos 5.0. > > > > When i have to do one full sync, of the disc, it takes me 12 Hours > > (500G). > > > > The 2 nodes are connected between Gigabit Ethernet, my question > > it's, what do i have to do, to make it faster? This time is > > insane! :) > > > > I know my disk does not write at Gigabit ethernet capacity, but > > indeed, lets say it writes at least at 50MBytes/sec. > > > > If we write data, at 50MBytes/sec it should take theoretically about > > 1.66 hours, its about 1h and 40 minutes or so. > > > > Of course the disk writes faster than that, at least in this case i > > have one SAS controller with 15k rpm disk's. > > > > I have in drbd.conf configured 'rate 100M'. > > > > I have drbd over the disk, and ext3 over it, but i think this is > > transparent for drbd, this should not take the drbd to slow. > > > > When it is doing the full sync, i see in '/proc/drbd' and it says > > it's copying at about 20K/sec, and since it is in bits, it is > > pretty slow. > > > > This is bug? Or I am the bug? :) Since I'm new to drbd, i think the > > second option will be more likely then the first one! :D > > > > Gigabit Ethernet = 125MBytes/Sec > > > > Thanks for all the help. > > --------- > > Igor Neves <igor.neves at 3gnt.net> > > 3GNTW - Tecnologias de Informação, Lda > > > > sip igor at 3gnt.net jid igor at jabber.3gnt.org > > icq 249075444 tlm 00351914503611 > > > > _______________________________________________ > > drbd-user mailing list > > drbd-user at lists.linbit.com > > http://lists.linbit.com/mailman/listinfo/drbd-user > > --------- Igor Neves <igor.neves at 3gnt.net> 3GNTW - Tecnologias de Informação, Lda sip igor at 3gnt.net jid igor at jabber.3gnt.org icq 249075444 tlm 00351914503611