Thanks for the reply Viktor, but the whole cluster has been working all the time and I am sure the cf got writes every second. I still don't see the huge sstables being split into small ones
On Tue, May 6, 2014 at 5:30 PM, Viktor Jevdokimov < viktor.jevdoki...@adform.com> wrote: > Enough to write 1 column and run nodetool flush. > > > > *From:* Viktor Jevdokimov [mailto:viktor.jevdoki...@adform.com] > *Sent:* Tuesday, May 6, 2014 12:00 PM > *To:* user@cassandra.apache.org > *Subject:* RE: Is the updating compaction strategy from 'sized tiered' to > 'leveled' automatic or need to be done manually? [heur] > > > > I mean insert/write data. When data fills memtable, memtable is flushed to > disk as sstable, when new sstable is created, Cassandra will check if > compaction is needed and triggers one. > > > > *From:* Yatong Zhang [mailto:bluefl...@gmail.com <bluefl...@gmail.com>] > *Sent:* Monday, May 5, 2014 9:54 AM > *To:* user@cassandra.apache.org > *Subject:* Re: Is the updating compaction strategy from 'sized tiered' to > 'leveled' automatic or need to be done manually? [heur] > > > > What you mean 'you need write to this CF'? I've changed the schema by > using CQL3 'alter table' statments. > > > > On Mon, May 5, 2014 at 2:28 PM, Viktor Jevdokimov < > viktor.jevdoki...@adform.com> wrote: > > To trigger LCS you need to write to this CF and wait when new sstable > flushes. I can’t find any other way to start LCS. > > > > Best regards / Pagarbiai > > *Viktor Jevdokimov* > > Senior Developer > > > > Email: viktor.jevdoki...@adform.com > > Phone: +370 5 212 3063, Fax +370 5 261 0453 > > J. Jasinskio 16C, LT-03163 Vilnius, Lithuania > > Follow us on Twitter: @adforminsider <http://twitter.com/#!/adforminsider> > > Experience Adform DNA <http://vimeo.com/76421547> > > [image: Adform News] <http://www.adform.com> > > [image: Adform awarded the Best Employer > 2012]<http://www.adform.com/site/blog/adform/adform-takes-top-spot-in-best-employer-survey/> > > > Disclaimer: The information contained in this message and attachments is > intended solely for the attention and use of the named addressee and may be > confidential. If you are not the intended recipient, you are reminded that > the information remains the property of the sender. You must not use, > disclose, distribute, copy, print or rely on this e-mail. If you have > received this message in error, please contact the sender immediately and > irrevocably delete this message and any copies. > > > > *From:* Yatong Zhang [mailto:bluefl...@gmail.com] > *Sent:* Sunday, May 4, 2014 5:22 AM > *To:* user@cassandra.apache.org > *Subject:* Is the updating compaction strategy from 'sized tiered' to > 'leveled' automatic or need to be done manually? [heur] > > > > Hi there, > > I am updating compaction strategy from 'sized tiered' to 'leveled' and > from > http://www.datastax.com/dev/blog/leveled-compaction-in-apache-cassandrait is > said: > > When updating an existing column family, reads and writes can continue as > usual while leveling of existing sstables is performed in the background. > > > > But I still see many old sstables with very large size and an old file > date. So I am wondering is the updating of compaction done automatically? > If yes, is there an estimate of time it will take? If not, what's the steps > to do it manually? > > I've googled a lot but can't find something helpful. Thanks for any > feedbacks and any help is of great appreciation. > > >
