You may wish to have a look at the timeout values in the DRBD.conf. They probably are on the low side for your network thus causing DRBD think you have connection outages where in fact it just has latency. ping-timeout, connect-int, timeout are the the variables to look at. Default Values are optimised for wired networks. Mit freundlichen Grüßen / Best Regards
Robert Köppl Customer Support & Projects Teamleader IT Support KNAPP Systemintegration GmbH Waltenbachstraße 9 8700 Leoben, Austria Phone: +43 3842 805-322 Fax: +43 3842 82930-500 [email protected] www.KNAPP.com Commercial register number: FN 138870x Commercial register court: Leoben The information in this e-mail (including any attachment) is confidential and intended to be for the use of the addressee(s) only. If you have received the e-mail by mistake, any disclosure, copy, distribution or use of the contents of the e-mail is prohibited, and you must delete the e-mail from your system. As e-mail can be changed electronically KNAPP assumes no responsibility for any alteration to this e-mail or its attachments. KNAPP has taken every reasonable precaution to ensure that any attachment to this e-mail has been swept for virus. However, KNAPP does not accept any liability for damage sustained as a result of such attachment being virus infected and strongly recommend that you carry out your own virus check before opening any attachment. Piotr Kandziora <[email protected]> Gesendet von: [email protected] 16.02.2012 17:01 An Digimer <[email protected]> Kopie [email protected] Thema Re: [DRBD-user] replication link stability Digimer, Thanks for your answer. DRBD Proxy could be a solution, but it is not possible for today. I am thinking of trying DRBD with protocol A, but currently I am not able to test on my environment as it is in production. I will have maintenance window on the weekend. Do you think it can help? If yes, may you suggest values for tcp send buffer? Thanks in advance. Best regards Piotr Kandziora On Thu, Feb 16, 2012 at 4:43 PM, Digimer <[email protected]> wrote: Hi Piotr, Samba (and similar protocols) are generally pretty forgiving of network issues, so it's not a surprise that they work where DRBD does not. DRBD is designed for high speed/low latency environments, and has a fair bit of attention paid to fault detection and recovery. If it sees a network fault, even a short one, it has to assume the link has failed and recovery is needed. This does not lend itself well to use on slow/error prone networks. Is it possible to use a wired connection for the DRBD replication? If not, I would suggest looking at DRBD Proxy instead, as it is designed to run over slow/unstable links, but it is asynchronous, so be advised that consistency is not always guaranteed. _______________________________________________ drbd-user mailing list [email protected] http://lists.linbit.com/mailman/listinfo/drbd-user
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