Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
Hello Adam, Thank you for replying me on this matter. I was trying to use 8.4, but since it didn't work, I tried with 9.0, but no sucess also. I want only 1 copy of the data blocks for each server to backup server. I was figuring out this model, but I couldn't apply it: Server 1: sdb1 - 1TB Server 2: sdc1 - 1TB Server 3: sdd1 - 1TB Server 4: sde1 - 1TB Server 5 (backup for the 4 servers) 4 disks: Sdb1 - 1TB Sdc1 - 1TB Sdd1 - 1TB Sde1 - 1TB I was not able to configure as this, because I don't the knowledge to do it. I got only 1 to 1, but I need 4 to 1. Thank you in advance, Fernando De: drbd-user-bounces at lists.linbit.com [mailto:drbd-user-bounces at lists.linbit.com] Em nome de Adam Goryachev Enviada em: domingo, 12 de novembro de 2017 20:34 Para: drbd-user at lists.linbit.com Assunto: Re: [DRBD-user] Data Block Changes replication with 5 servers On 09/11/17 05:01, fernandocmachado at yahoo.com.br <mailto:fernandocmachado at yahoo.com.br> wrote: Hello everyone, I'm trying to implemente the following scenario: 4 servers running KVM virtual machines and 1 server as a backup of the 4 servers. I'm trying to implemente the DRBD to replicate the data block changed from the 4 server to this backup server, but I don't know how to do that, since all the "Howtos" on the internet applies only for 2 nodes replication. Could anyone help me on this? Yes. I could add more, but then it probably wouldn't be helpful. On the other hand, you could add more information about your environment and it would definitely be helpful. What version of DRBD are you using? How many copies of the "data blocks" do you want? If it one copy on one of the 4 servers plus one copy on the "backup" server? What is the storage capacity of the 4 servers and the backup? OK, I'll add some hints... If using DRBD 8.4: For each of the four servers, configure DRBD together with the backup server. The backup server will need 4 x storage capacity of the other servers, you will end up with 2 copies of all data. Best to use LVM to create one LV for each remote server, and then use DRBD to connect these. If using DRBD9: Just setup DRBD as normal on all 5 nodes, and then use drbdmanage to ensure one copy is on the "backup" node and however many copies you need are on the other 4 nodes. Possibly, you want 5 copies of data, so all machines have a full copy of all data, but probably 5 copies of data is going to cause you a lot of problems. In either case, keep in mind that the backup server is going to need enough ethernet bandwidth as well as disk IOPS to be able to write all data changes from all 4 nodes. This could massively reduce your overall disk IOPS. You should test carefully prior to deployment. If you do provide more information, then me or someone else can likely provide more detailed/helpful advice. Regards, Adam -- Adam Goryachev Website Managers www.websitemanagers.com.au <http://www.websitemanagers.com.au> -- The information in this e-mail is confidential and may be legally privileged. It is intended solely for the addressee. Access to this e-mail by anyone else is unauthorised. If you are not the intended recipient, any disclosure, copying, distribution or any action taken or omitted to be taken in reliance on it, is prohibited and may be unlawful. If you have received this message in error, please notify us immediately. Please also destroy and delete the message from your computer. Viruses - Any loss/damage incurred by receiving this email is not the sender's responsibility. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.linbit.com/pipermail/drbd-user/attachments/20171113/dfb2db37/attachment.htm>