Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
Hi, On 12/10/2009 10:05 PM, Jakov Sosic wrote: > On Thu, 2009-12-10 at 19:11 +0100, Lars Ellenberg wrote: > > >> exactly same hardware? >> > yes > > >> exactly same kernel and stuff? >> > CentOS 5.4, I really look after details, and 'rpm -qa | sort' give me > exactly the same output on both nodes, config files are also same, > everything is OK. > > I tried reversing roles, and when secondary becomes primary, then the IO > load reverses too. > > I found on the internet that 3ware controllers have issues on Linux, and > I have 3ware controller... So maybe that is the part of problem... > Yes, they really suck, use areca raid controllers, and you will see what it's a real hardware RAID. (Yes, much better then software raid and 3ware controllers) > > >> io scheduler? -> use deadline. >> > I'm using it... I know about kernel threads problem with CFQ. > > > >> otherwise: we sell "DRBD Healthchecks" ;) >> > I'm just a contractor too, but I think that the owners will buy FC > storage and get on without cheap JBODs... > > > > -- Igor Neves<igor.neves at 3gnt.net> 3GNTW - Tecnologias de Informação, Lda SIP: igor at 3gnt.net JID: igor at 3gnt.net ICQ: 249075444 MSN: igor at 3gnt.net TLM: 00351914503611 PSTN: 00351252377120