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From Vladimir Yudovin <vla...@winguzone.com>
Subject Re: Some questions to updating and tombstone
Date Mon, 14 Nov 2016 08:24:40 GMT
Hi Boying,



UPDATE write new value with new time stamp. Old value is not tombstone, but remains until
compaction. gc_grace_period is not related to this.



Best regards, Vladimir Yudovin, 

Winguzone - Hosted Cloud Cassandra
Launch your cluster in minutes.





---- On Mon, 14 Nov 2016 03:02:21 -0500Lu, Boying &lt;Boying.Lu@dell.com&gt; wrote
----




Hi, All,

 

Will the Cassandra generates a new tombstone when updating a column by using CQL update statement?

 

And is there any way to get the number of tombstones of a column family since we want to void
generating

too many tombstones within gc_grace_period?

 

Thanks

 

Boying








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