Re: Choosing a compaction strategy (TWCS)

2016-12-21 Thread Voytek Jarnot
it’ll compact it in a >>> single sstable compaction). >>> >>> >>> >>> - Jeff >>> >>> >>> >>> *From: *Voytek Jarnot >>> *Reply-To: *"user@cassandra.apache.org" >>> *Date: *Friday, Decem

Re: Choosing a compaction strategy (TWCS)

2016-12-17 Thread Voytek Jarnot
able >> over 24 hours old that’s at least 80% tombstones, it’ll compact it in a >> single sstable compaction). >> >> >> >> - Jeff >> >> >> >> *From: *Voytek Jarnot >> *Reply-To: *"user@cassandra.apache.org" >> *Date: *Friday,

Re: Choosing a compaction strategy (TWCS)

2016-12-16 Thread Jeff Jirsa
that’s at least 80% tombstones, it’ll compact it in a >> single sstable compaction). >> >> >> >> - Jeff >> >> >> >> From: Voytek Jarnot >> Reply-To: "user@cassandra.apache.org" >> Date: Friday, December 16, 2016 at 7:3

Re: Choosing a compaction strategy (TWCS)

2016-12-16 Thread Voytek Jarnot
heoretically” 1. In practice, they’re probably going to bleed into 2 > anyway (memTable flush to sstable isn’t going to happen exactly when the > window expires, so it’ll bleed a bit anyway), so I bet no meaningful impact. > > > > - Jeff > > > > *From: *Voytek J

Re: Choosing a compaction strategy (TWCS)

2016-12-16 Thread Jeff Jirsa
Friday, December 16, 2016 at 11:12 AM To: "user@cassandra.apache.org" Subject: Re: Choosing a compaction strategy (TWCS) Thank you Jeff - always nice to hear straight from the source. Any issues you can see with 3 (my calendar-week bucket not aligning with the arbitrary 7-day window

Re: Choosing a compaction strategy (TWCS)

2016-12-16 Thread Voytek Jarnot
uot; > *Date: *Friday, December 16, 2016 at 11:12 AM > > *To: *"user@cassandra.apache.org" > *Subject: *Re: Choosing a compaction strategy (TWCS) > > > > Thank you Jeff - always nice to hear straight from the source. > > > > Any issues you can see with 3 (my calendar

Re: Choosing a compaction strategy (TWCS)

2016-12-16 Thread Jeff Jirsa
. - Jeff From: Voytek Jarnot Reply-To: "user@cassandra.apache.org" Date: Friday, December 16, 2016 at 11:12 AM To: "user@cassandra.apache.org" Subject: Re: Choosing a compaction strategy (TWCS) Thank you Jeff - always nice to hear straight from the source.

Re: Choosing a compaction strategy (TWCS)

2016-12-16 Thread Voytek Jarnot
table – it > won’t kill you, but if you can avoid it, avoid it. > > > > - Jeff > > > > > > *From: *Jeff Jirsa > *Date: *Friday, December 16, 2016 at 10:47 AM > *To: *"user@cassandra.apache.org" > *Subject: *Re: Choosing a

Re: Choosing a compaction strategy (TWCS)

2016-12-16 Thread Jeff Jirsa
. - Jeff From: Jeff Jirsa Date: Friday, December 16, 2016 at 10:47 AM To: "user@cassandra.apache.org" Subject: Re: Choosing a compaction strategy (TWCS) With a 10 year retention, just ignore the target sstable count (I should remove that guidance, to be honest), and

Re: Choosing a compaction strategy (TWCS)

2016-12-16 Thread Jeff Jirsa
With a 10 year retention, just ignore the target sstable count (I should remove that guidance, to be honest), and go for a 1 week window to match your partition size. 520 sstables on disk isn’t going to hurt you as long as you’re not reading from all of them, and with a partition-per-week the bl