[DRBD-user] Performance Issues after Upgrade

Helmut Wollmersdorfer helmut.wollmersdorfer at gmx.at
Thu Jun 24 15:41:46 CEST 2004

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.


Lars Ellenberg schrieb:

>>>   rm /var/lib/drbd/*

> unwise... only do this when you know what you are doing.

That's true. In my case I had a good backup of the data, and at least 
created the filesystem and data new on the primary to be sure.

> it _cannot_ have any effect on sync speed (unless you had a time skew,
> and the drbd.conf.parsed is outdated...)

Very impossible, as my nodes use chrony against 4 good timeservers, 
accuracy is within milliseconds. [1]

I can't say, what went wrong at my configuration 0.6.10 -> 0.6.12, sync 
was very slow, nearly hanging. I started nearly from scratch, to avoid 
wasting time.


[1] I don't want to have problems with (hidden) time sensitivity, 
heartbeat is time sensitiv - I believe. Time is a nice topic for 
desaster and exception testing, main functionality too. If a tester 
wants to find some dozen bugs within few days in "well tested" software, 
it's easy with time, especially in multi-layered, multi-tiered systems.

Helmut Wollmersdorfer





More information about the drbd-user mailing list