Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
Most hard drives ship with write-cache enabled. When using decent raid controllers its best to turn off the write(back) cache on hard drives. In our testing it makes no difference anyway with a good card. Its possible your lost data was in hard drive cache. ________________________________ From: drbd-user-bounces at lists.linbit.com [mailto:drbd-user-bounces at lists.linbit.com] On Behalf Of Mark Eisenblaetter Sent: 01 August 2008 14:22 To: drbd-user at lists.linbit.com Subject: [DRBD-user] Mysql on DRBD: Cache Problem? Hi List, I'm trying to run a DRBDMySQL Cluster (Active/Passive) with Replication for easier backup. My problem ist that after a hardkill from the master(Powerkill) the slave misses binlog positions. After disable the Arraycontroller Write cache its reduced from 100k to 16k Position but that not enough. I run DRBD with Protocal C and the minimal max-buffer of 32k. Is there any cache i miss? Or somthing else? Mark setup: 2x HP DL360G5 whit raid 10 and Gigabit network for drbdsync only. -- Mark Eisenblätter Geissendoerfer & Leschinsky GmbH www.gl-sytemhaus.de ------------------------------------------------------------------------------- This email may contain legally privileged and/or confidential information. It is solely for and is confidential for use by the addressee. Unauthorised recipients must preserve, observe and respect this confidentiality. If you have received it in error please notify us and delete it from your computer. Do not discuss, distribute or otherwise copy it. Unless expressly stated to the contrary this e-mail is not intended to, and shall not, have any contractually binding effect on the Company and its clients. We accept no liability for any reliance placed on this e-mail other than to the intended recipient. If the content is not about the business of this Company or its clients then the message is neither from nor sanctioned by the Company. We accept no liability or responsibility for any changes made to this e-mail after it was sent or any viruses transmitted through this e-mail or any attachment. It is your responsibility to satisfy yourself that this e-mail or any attachment is free from viruses and can be opened without harm to your systems. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.linbit.com/pipermail/drbd-user/attachments/20080801/11d70332/attachment.htm>