Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
I had super slow sync rates as well over our network. The servers were plugged into the same subnet but I could not get transfer rates faster then 12 mb/s I used a cross over cable and connected them to the second ethernets. Then I was geting 80 mb/s. Must have something to do with our network switches or traffic? Anyways hopes this helps anyone. Instead of waiting 8 hours for a sync I only had to wait 1 hour. Monty Taylor wrote: > I couldn't agree more! It would also be really nice to be able to > query drbd to find out what values the config settings are set to. > > Monty > > On 8/8/06, Vampire D <vampired at gmail.com> wrote: >> I really wish there was a interface to tell how fast the drbd devices >> are >> syncing. >> >> >> >> On 8/8/06, Monty Taylor <mtaylor at mysql.com> wrote: >> > When I get back in tomorrow, I'm going to do a disk benchmark as well >> > as scp'ing a big file. I wasn't showing any significant iowait on >> > either of the boxes, so I was originally not thinking it was disk - >> > but I could be wrong. >> > >> > I'll post when I know how the disk test turns out. >> > >> > Thanks, >> > Monty >> > >> > On 8/8/06, Gary W. Smith < gary at primeexalia.com> wrote: >> > > But an scp would indicate disk latency as well. It's great they all >> > > talk 1gb but can they handle 1gb? As Clive mentioned, try scp'ing a >> > > 100mb file and see if you are also getting 8mb/sec. >> > > >> > > >> > > >> > > -----Original Message----- >> > > From: drbd-user-bounces at lists.linbit.com >> > > [mailto: drbd-user-bounces at lists.linbit.com] On Behalf >> Of Monty Taylor >> > > Sent: Tuesday, August 08, 2006 4:12 PM >> > > To: Vampire D >> > > Cc: drbd-user at lists.linbit.com >> > > Subject: Re: [DRBD-user] sync rate seems low >> > > >> > > I agree, that's what it seems like. But then I ran iperf on the >> > > interface and got this: >> > > >> > > [ 3] local 192.168.0.2 port 32810 connected with 192.168.0.1 >> port 5001 >> > > [ ID] Interval Transfer Bandwidth >> > > [ 3] 0.0-10.0 sec 1.08 GBytes 929 Mbits/sec >> > > >> > > Which is more like what I'd expect to see. On the interface. So >> why is >> > > DRBD only seeing 100M while the interface can support and is running >> > > at 1G? >> > > >> > > Thanks! >> > > Monty >> > > >> > > On 8/8/06, Vampire D <vampired at gmail.com > wrote: >> > > > >> > > > Well first off, I doubt you will be any where near 125M sync rate, >> > > that's >> > > > 125MB/s if I am not mistaken. I run GBit connections and I >> only have >> > > a sync >> > > > rate of around 60M. >> > > > >> > > > 2nd, 100Mbit caps at around 12MB/s throughput and 10Mbit is >> roughly >> > > 1.2Mb/s >> > > > so it is definately at 100Mbit. But 8Mbit isn't all that bad for >> > > 100Mbit, >> > > > it is only 2/3rds of the capacity of your network interface, so I >> > > assume >> > > > your disk sub system is your bottleneck one way or another. Try >> > > benching >> > > > your drives with timed dd or use some bench tool. >> > > > >> > > > With two raptors and Gbit ethernet cross over cabled, I get around >> > > 56Mb/s >> > > > but I haven't been able to test the sync rate since the initial >> sync >> > > and no >> > > > one seems to have an answer to easily test that after the drbd is >> > > > consisitent. >> > > > >> > > > >> > > > On 8/8/06, Monty Taylor <mtaylor at mysql.com> wrote: >> > > > > >> > > > Hey all, >> > > > >> > > > I'm rolling out a DRBD at the moment and I'm getting much lower >> > > > initial sync rate than I would expect. I have the two machines >> > > > connected with crossover cables and the rate set at 125M, but >> I'm only >> > > > seeing 8M/sec of transfer rate. >> > > > >> > > > I'm sure I'm missing something stupid, but I've rolled DRBD out >> > > > several times over the past couple of months and never had this >> > > > problem. Anybody have an idea of something I can check? >> > > > >> > > > Thanks, >> > > > Monty >> > > > _______________________________________________ >> > > > drbd-user mailing list >> > > > drbd-user at lists.linbit.com >> > > > http://lists.linbit.com/mailman/listinfo/drbd-user >> > > > >> > > > >> > > > >> > > > >> > > > -- >> > > > "Do the actors on Unsolved Mysteries ever get arrested because >> they >> > > look >> > > > just like the criminal they are playing?" >> > > > >> > > > Christopher >> > > > >> > > _______________________________________________ >> > > drbd-user mailing list >> > > drbd-user at lists.linbit.com >> > > http://lists.linbit.com/mailman/listinfo/drbd-user >> > > >> > > >> > >> >> >> >> -- >> >> "Do the actors on Unsolved Mysteries ever get arrested because they >> look >> just like the criminal they are playing?" >> >> Christopher >> > _______________________________________________ > drbd-user mailing list > drbd-user at lists.linbit.com > http://lists.linbit.com/mailman/listinfo/drbd-user