Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
De:drbd-user-bounces at lists.linbit.com Para:"drbd-user" drbd-user at lists.linbit.com Cópia: Data:Thu, 23 Sep 2004 14:26:04 +0200 Assunto:Re: [DRBD-user] drbd tranfer limitations (random and sequential acccess) using raw > / 2004-09-23 09:01:50 -0300 > \ crsurf: > > Hello list > > I?m using drbd in a Gigabit network (crossover cable) and when I > > synchronize data (sequential read/write) the tranfer hit to 30~40 > > Mb/s, but when I make inserts into database (random read/write) that > > access drbd device via raw, the transfer rate hit only 5~6 Mb/s. > > Exists some way to improve this performance? I increased the > > sndbuf-size to 256K, but no such effect. I increase interface MTU to > > 9000 and no such effect too. One database process that run in 4 min. > > without replication, run in 30 min. with replication. Now I?m trying > > using filesystem jfs instead raw to view if the performance will be > > improved. > > Maybe sync-nice can help us? > > I am not sure which transfer rate you are talking about. > the throughput of your applications, or the resync throughput? > With resync tha transfer hit 40~50 Mb/s, afer I changed MTU. > or the resync throughput while you have resynchronization and > applications running concurrently? > And when I make a insert into database the transfer hit to 4~6 Mb/s, without full synchronization, only online synchronization. > and when you talk about sync-nice, you are using drbd 0.6 ? Yes, I´m using 0.6.13 > > maybe you want to use 0.7 instead. it reduces the amount of data > transfered to a minimum, thus reducing the time for resynchronization to > some one to three minutes, typically. Well, I´m already compiled 0.7.4, but my question is: I can use the config file of 0.6 in 0.7? And the drbdsetup commands to replicate and define primary node are the same? I will read documentation now, but if you comment this I win some time. > > lge > _______________________________________________ > drbd-user mailing list > drbd-user at lists.linbit.com > http://lists.linbit.com/mailman/listinfo/drbd-user > > Esta mensagem foi verificada pelo E-mail Protegido Terra. > Scan engine: VirusScan / Atualizado em 22/09/2004 / Vers?o: 1.5.2 > Proteja o seu e-mail Terra: http://www.emailprotegido.terra.com.br/ > > E-mail classificado pelo Identificador de Spam Inteligente Terra. > Para alterar a categoria classificada, visite > http://www.terra.com.br/centralunificada/emailprotegido/imail/imail.cgi?+_u=crsurf&_l=1,1095942407.249501.6542.turvo.terra.com.br,3801,Des15,Des15 > Grateful Cristiano da Costa -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.linbit.com/pipermail/drbd-user/attachments/20040923/ce5e4e8f/attachment.htm>