cassandra-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From DuyHai Doan <doanduy...@gmail.com>
Subject RE: Can SSTables overlap with SizeTieredCompactionStrategy?
Date Wed, 21 May 2014 21:53:07 GMT
Are you sure there is no TTL set on your data? It might explain the shrink
in sstable size after compaction.
Le 21 mai 2014 23:17, "Phil Luckhurst" <phil.luckhurst@powerassure.com> a
écrit :

> We based the estimate on a previous controlled observation. We generated a
> year's worth of one minute data for a single identifier and recorded the
> size of the resulting sstable. By adding the data one month at a time we
> observed that there was a linear predictable increase in the sstable size.
> Using this we simply multiplied by the number of identifiers, in this case
> 700, to get the 7GB estimate.
> And as noted above this estimate is correct once the data is compacted to
> one sstable but is wrong when there are multiple sstables.
>
> Phil
>
>
> Andreas Finke wrote
> > Hi Phil,
> >
> > there is no dump question ;) What is your size estimation based on e.g.
> > what size is a column in your calculation?
>
>
>
>
>
> --
> View this message in context:
> http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/Can-SSTables-overlap-with-SizeTieredCompactionStrategy-tp7594574p7594641.html
> Sent from the cassandra-user@incubator.apache.org mailing list archive at
> Nabble.com.
>

Mime
View raw message