Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
/ 2005-08-21 23:50:17 +0930 \ David: > Hi all, > > I was just wondering - when using external meta data, stored on a separate > physical device, how critical is the speed of that physical device to the > overall performance of the drbd resource? not too much. we have all sorts of tricks in place to reduce the number of meta data updates. you could do watch -n1 cat /proc/drbd and watch the bm: and al: numbers. each increment there is a synchronous write to the meta data. this happens during setup, during resync, and every now and then during normal operation. if it happens too often during normal operation, you could increase the al-size parameter (with implications for the resync time in case of a primary crash). -- : Lars Ellenberg Tel +43-1-8178292-0 : : LINBIT Information Technologies GmbH Fax +43-1-8178292-82 : : Schoenbrunner Str. 244, A-1120 Vienna/Europe http://www.linbit.com : __ please use the "List-Reply" function of your email client.