Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
Correction: Just noticed you are using Dual Core AMDs. Please try CPU masks of 1 and 3. -----Original Message----- From: drbd-user-bounces at lists.linbit.com [mailto:drbd-user-bounces at lists.linbit.com] On Behalf Of Robert Dunkley Sent: 19 January 2009 10:34 To: Lars Täuber Cc: drbd-user at lists.linbit.com Subject: RE: [DRBD-user] slow sync speed of 12TB over 10GE Hi Lars, If you have BBUs in the raid card then try adding the following to the disk section: no-disk-flushes;no-md-flushes; What is the MTU set to on the LAN connection? Also in the syncer section try "cpu-mask 1" and "cpu-mask 5". The NUMA based architecture of Opteron boards means the CPU directly connected to the Raid card bus is usually faster. Hope this helps, Rob -----Original Message----- From: drbd-user-bounces at lists.linbit.com [mailto:drbd-user-bounces at lists.linbit.com] On Behalf Of Lars Täuber Sent: 19 January 2009 10:33 To: drbd-user at lists.linbit.com Subject: Re: [DRBD-user] slow sync speed of 12TB over 10GE Hi Robert, "Robert Dunkley" <Robert at saq.co.uk> schrieb: > Hi Lars, > > What are you using to interconnect the two DRBD systems? Loss of half of performance seems excessive. I usually get about 95% of the arrays sustained write performance and multiple arrays can synch at once without penalty. I use 10GEthernet. Have a look: http://lists.linbit.com/pipermail/drbd-user/2009-January/011169.html Lars _______________________________________________ drbd-user mailing list drbd-user at lists.linbit.com http://lists.linbit.com/mailman/listinfo/drbd-user The SAQ Group Registered Office: 18 Chapel Street, Petersfield, Hampshire GU32 3DZ SAQ is the trading name of SEMTEC Limited. Registered in England & Wales Company Number: 06481952 http://www.saqnet.co.uk AS29219 SAQ Group Delivers high quality, honestly priced communication and I.T. services to UK Business. Broadband : Domains : Email : Hosting : CoLo : Servers : Racks : Transit : Backups : Managed Networks : Remote Support. ISPA Member Find us in http://www.thebestof.co.uk/petersfield -------------- next part -------------- An embedded and charset-unspecified text was scrubbed... Name: ATT134445.txt URL: <http://lists.linbit.com/pipermail/drbd-user/attachments/20090119/aa74a578/attachment.txt>