Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
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 > >