Re: Time Series schema performance

2018-05-30 Thread Haris Altaf
Thanks Affan Syed! :) On Wed, 30 May 2018 at 11:07 sujeet jog wrote: > Thanks Jeff & Jonathan, > > > On Tue, May 29, 2018 at 10:41 PM, Jonathan Haddad > wrote: > >> I wrote a post on this topic a while ago, might be worth reading over: >> >> http://thelastpickle.com/blog/2017/08/02/time-series-

Re: Fwd: Re: cassandra update vs insert + delete

2018-05-30 Thread Rahul Singh
Soft delete = logical delete - which is an update. An update doesnt create a tombstone . It appends to the sstable,and when they are compacted, the latest write is what is seen as the definitive data.  A tombstone by definition is an update which tells C* to remove the value that was there befo

Strange metadata being appended in some rows

2018-05-30 Thread Charulata Sharma (charshar)
Hi, I am observing a very strange behavior in our cluster. Metadata is being prefixed in some rows. This metadata cannot be sent by application primarily because application writing to C* will not have this data, and also applications use custom Java objects and this metadata doesn’t fall in

Re: Strange metadata being appended in some rows

2018-05-30 Thread Jeff Jirsa
Most of what you describe sounds pretty DSE specific so I suspect your best source for answers will be datastax There were bugs in some versions of Cassandra that caused corruption during a few milliseconds race of ALTER TABLE, and if you’re not using compression with CRC checking enabled, it’s