Yep. Most of my arguments are the same from seeing it in production. Cass= andra is used for fast writes and generally fast reads with redundancy an= d failover for OLTP and OLAP. It=E2=80=99s not just a bunch of dumb disks= . You can throw crap into S3 or HD=46S and analyze / report with Hive or = Spark.
You can always have more data density for use adds that are not critical = in a different cluster or DC. Rahul On Mar 9, 2018, 7:25 AM -0500, Kyrylo Lebediev <kyrylo_lebed...@epam.com>, wrote: > Niclas, > Here is Jeff's comment regarding this: https://stackoverflow.com/a/31690279 > From: Niclas Hedhman <nic...@apache.org> > Sent: Friday, March 9, 2018 9:09:53 AM > To: user@cassandra.apache.org; Rahul Singh > Subject: Re: Adding disk to operating C* > > I am curious about the side comment; "Depending on your usecase you may not > want to have a data density over 1.5 TB per node." > > Why is that? I am planning much bigger than that, and now you give me > pause... > > > Cheers > Niclas > > On Wed, Mar 7, 2018 at 6:59 PM, Rahul Singh <rahul.xavier.si...@gmail.com> > wrote: > > Are you putting both the commitlogs and the Sstables on the adds? Consider > > moving your snapshots often if that’s also taking up space. Maybe able to > > save some space before you add drives. > > > > You should be able to add these new drives and mount them without an issue. > > Try to avoid different number of data dirs across nodes. It makes > > automation of operational processes a little harder. > > > > As an aside, Depending on your usecase you may not want to have a data > > density over 1.5 TB per node. > > > > -- > > Rahul Singh > > rahul.si...@anant.us > > > > Anant Corporation > > > > On Mar 7, 2018, 1:26 AM -0500, Eunsu Kim <eunsu.bil...@gmail.com>, wrote: > > > Hello, > > > > > > I use 5 nodes to create a cluster of Cassandra. (SSD 1TB) > > > > > > I'm trying to mount an additional disk(SSD 1TB) on each node because each > > > disk usage growth rate is higher than I expected. Then I will add the the > > > directory to data_file_directories in cassanra.yaml > > > > > > Can I get advice from who have experienced this situation? > > > If we go through the above steps one by one, will we be able to complete > > > the upgrade without losing data? > > > The replication strategy is SimpleStrategy, RF 2. > > > > > > Thank you in advance > > > --------------------------------------------------------------------- > > > To unsubscribe, e-mail: user-unsubscr...@cassandra.apache.org > > > For additional commands, e-mail: user-h...@cassandra.apache.org > > > > > > > -- > Niclas Hedhman, Software Developer > http://zest.apache.org - New Energy for Java
