Here is a calculator someone has put together http://btoddb-cass-storage.blogspot.com/2012/01/ive-been-asked-for-spreadsheet-to-help.html?m=1
Rahul > On Apr 30, 2015, at 12:53 AM, arun sirimalla <arunsi...@gmail.com> wrote: > > Hi Rahul, > > If you are expecting 15 GB of data per day, here is the calculation. > > 1 Day = 15 GB, 1 Month = 450 GB, 1 Year = 5.4 TB, so your raw data size for > one year is 5.4 TB with replication factor of 3 it would be around 16.2 TB of > data for one year. > > Taking compaction into consideration and your use case being write heavy, if > you go with size tiered compaction. you would need twice the space of your > raw data. > > So you would need around 32-34 TB of disk space. > > Reference: > http://docs.datastax.com/en/cassandra/2.0/cassandra/architecture/architecturePlanningDiskCapacity_t.html > > Thanks > >> On Wed, Apr 29, 2015 at 9:20 PM, Rahul Bhardwaj >> <rahul.bhard...@indiamart.com> wrote: >> Hi All, >> >> >> We are planning to set up a cluster of 5 nodes with RF 3 for write heavy >> project, our current database size is around 500 GB. And it is growing at >> rate of 15 GB every day. We learnt that cassandra consumes space for >> compaction processes, So how can we calculate the amount of disk space we >> would require. >> >> Kindly suggest. >> >> >> >> Regards: >> Rahul Bhardwaj >> >> >> Follow IndiaMART.com for latest updates on this and more: Mobile Channel: >> >> >> Watch how IndiaMART Maximiser helped Mr. Khanna expand his business. kyunki >> Kaam Yahin Banta Hai!!! > > > > -- > Arun > Senior Hadoop/Cassandra Engineer > Cloudwick > > Champion of Big Data (Cloudera) > http://www.cloudera.com/content/dev-center/en/home/champions-of-big-data.html > > 2014 Data Impact Award Winner (Cloudera) > http://www.cloudera.com/content/cloudera/en/campaign/data-impact-awards.html >
