View stunning SlideShares in full-screen with the new iOS app!Introducing SlideShare for AndroidExplore all your favorite topics in the SlideShare appGet the SlideShare app to Save for Later — even offline
View stunning SlideShares in full-screen with the new Android app!View stunning SlideShares in full-screen with the new iOS app!
Level-based Compaction• SSTables are non-overlapping within a level• Bounds the number that can contain a given row L2: 1000 MB L1: 100 MB L0: newly flushed 1 8
Read performance: maxtimestamp• Sort sstables by maximum (client-provided) timestamp• Only merge sstables until we have the columns request• Allows pre-merging highly fragmented rows without waiting for compaction 1 9
CQLcqlsh> SELECT * FROM users WHERE state=UT AND birth_date > 1970;! KEY | birth_date | full_name | state | bsanderson | 1975 | Brandon Sanderson | UT | 2 0