Thanks, I wasn't sure if memtables and sstables contain only the newest
values (I though replication might require storing old values).
So the number of lookups for a newest value should be bound by
max_compaction_threshold setting. Looks to me it's safe to perform many
UPDATEs of non-pk columns.
On 05/21/2015 11:48 AM, Jens Rantil wrote:
Artur,
That's not entirely true. Writes to Cassandra are first written to a
memtable (in-memory table) which is periodically flushed to disk. If
multiple writes are coming in before the flush, then only a single
record will be written to the disk/sstable. If your have writes that
aren't coming within the same flush, they will get removed when you are
compacting just like you say.
Unfortunately I can't answer this regarding Counters as I haven't worked
with them.
Hope this helped at least.
Cheers,
Jens
