Open TDSB does it I believe : http://opentsdb.net/schema.html
I am curious to know although the difference between having string as a row key, converting them into bytes, and then storing the key , as opposed to having numerical values stored as native bytes as bit masks. On Fri, Oct 28, 2011 at 3:27 PM, Rita <rmorgan...@gmail.com> wrote: > Thanks for your reply. > > I am curious, can you give me an example of having a key as a raw bytes and > do byte comparison? I am not a native java programmer so an example would > be extremely helpful in my case. > > > > On Fri, Oct 28, 2011 at 12:23 PM, Stack <st...@duboce.net> wrote: > > > On Fri, Oct 28, 2011 at 4:30 AM, Rita <rmorgan...@gmail.com> wrote: > > > Couple of questions: > > > What is the best delimiter for a key? Does it even matter? I read > > somewhere > > > that using a \t is optimal for a reason. > > > > > > > Do without a delimiter if you can. Just make the row key elements of > > fixed size. > > > > It looks like though that your your key schema would require you have > > a delimiter (I'm guessing 'server' can be anything -- or can it be > > contained so all servers have same size'd name?) > > > > If you have to have a delimiter, choose one that is illegal in a > > server name or user name so you can be sure it doesn't show up in > > either ever and throw off your parse. > > > > > For these types of queries I have been using filters particularly, > > > RegexStringComparator > > > (w/start&stop) and things seem to work to an extent. I was wondering is > > this > > > the correct way to query or is there a more optimal way? > > > > > > > Regex'ing over keys will be expensive. HBase is all bytes. To regex, > > you need to change the bytes into a String. Java Strings are i18n and > > multi-byte natively so it costs making them. Can you make your key as > > raw bytes and do byte compares in your filtering? > > > > > I also couldnt find any examples using filters for timeseries data, is > > there > > > a place I should be looking at? > > > > > > > > > > I thought tsdb used filters? > > > > St.Ack > > > > > > -- > --- Get your facts first, then you can distort them as you please.-- >
