This helped me http://hadoop-hbase.blogspot.in/2011/12/deletion-in-hbase.html
./Zahoor HBase Musings On 14-Aug-2012, at 6:54 PM, Harsh J <ha...@cloudera.com> wrote: > Hi Yonghu, > > A timestamp is stored along with each insert. The ttl is maintained at > the region-store level. Hence, when the log replays, all entries with > expired TTLs are automatically omitted. > > Also, TTL deletions happen during compactions, and hence do not > carry/need Delete events. When scanning a store file, TTL-expired > entries are automatically skipped away. > > On Tue, Aug 14, 2012 at 3:34 PM, yonghu <yongyong...@gmail.com> wrote: >> My hbase version is 0.92. I tried something as follows: >> 1.Created a table 'test' with 'course' in which ttl=5. >> 2. inserted one row into the table. 5 seconds later, the row was deleted. >> Later when I checked the log infor of 'test' table, I only found the >> inserted information but not deleted information. >> >> Can anyone tell me which information is written into hlog when data is >> deleted by ttl or in this situation, no information is written into >> the hlog. If there is no information of deletion in the log, how can >> we guarantee the data recovered by log are correct? >> >> Thanks! >> >> Yong > > > > -- > Harsh J
