On Thu, Jul 08, 2004 at 12:00:20PM +0200, Andras Horvai wrote: > Hi All, > > I plan to resize my rrd files. Plan to raise the daily RRA (5 minutes > average) from 600 rows to 17280 rows to > have 2 months of 5 minutes average data. I read somewhere (perhaps in cacti > forum) that this can cause > problems eg. I lost the data what 2 weeks earlier. I read a opinion that > resize the rrds more than one step. > My question is what steps do you recommend? eg. first raise from 600 rows to > 800 rows and wait 1 day (or less) > and after raise from 800 rows to 1000 rows etc. Can you advise?
This depends on what you want and what you need. The "problem" is in auto-selecting the correct RRA. If you ask for "--start end-5d --end now", RRDtool currently has no other choice than to use the 2-hour RRA. Next you are adding more rows to the 5-minute RRA. RRDtool may use the 5-minute RRA where it used to use the 2-hour RRA. Since this data is not yet known (you will be adding "NaN" rows) the data _seems_ lost. If your front end is careful and sets both "--start" and "--end" to suitable values, RRDtool will select the 2-hour RRA (or even the 1-day RRA) in stead of the 5-minute RRA and no harm is done. HTH Alex -- I ask you to respect any "Reply-To" and "Mail-Follow-Up" headers. If you reply to me off-list, you'd better tell me you're doing so. If you don't, and if I reply to the list, that's your problem, not mine. -- Unsubscribe mailto:[EMAIL PROTECTED] Help mailto:[EMAIL PROTECTED] Archive http://www.ee.ethz.ch/~slist/rrd-users WebAdmin http://www.ee.ethz.ch/~slist/lsg2.cgi
