Hi,
Please forgive me if my questions have been already asked and answered many
times because I could not googled any of them.
If I do the following commands in hbase shell,
hbase(main):048:0> create "test_ts_ver", "data"
0 row(s) in 1.0550 seconds
hbase(main):049:0> describe "test_ts_ver"
DESCRIPTION ENABLED
{NAME => 'test_ts_ver', FAMILIES => [{NAME => 'data true
', BLOOMFILTER => 'NONE', REPLICATION_SCOPE => '0',
VERSIONS => '3', COMPRESSION => 'NONE', MIN_VERSIO
NS => '0', TTL => '2147483647', BLOCKSIZE => '65536
', IN_MEMORY => 'false', BLOCKCACHE => 'true'}]}
1 row(s) in 0.0940 seconds
hbase(main):052:0> put "test_ts_ver", "row_1", "data:name", "benyi_w", 100
0 row(s) in 0.0040 seconds
hbase(main):053:0> put "test_ts_ver", "row_1", "data:name", "benyi_1", 110
0 row(s) in 0.0050 seconds
hbase(main):054:0> put "test_ts_ver", "row_1", "data:name", "benyi_2", 120
0 row(s) in 0.0040 seconds
hbase(main):055:0> put "test_ts_ver", "row_1", "data:name", "benyi_3", 130
0 row(s) in 0.0040 seconds
hbase(main):056:0> put "test_ts_ver", "row_1", "data:name", "benyi_4", 140
0 row(s) in 0.0040 seconds
hbase(main):057:0> get "test_ts_ver", "row_1", { TIMERANGE=>[0,200] }
COLUMN CELL
data:name timestamp=140, value=benyi_4
1 row(s) in 0.0140 seconds
hbase(main):058:0> get "test_ts_ver", "row_1", { TIMERANGE=>[0,200],
VERSIONS=>5 }
COLUMN CELL
data:name timestamp=140, value=benyi_4
data:name timestamp=130, value=benyi_3
data:name timestamp=120, value=benyi_2
3 row(s) in 0.0050 seconds
So far so good. But if I try to get timestamp=100 or 110, I still can get
them
hbase(main):059:0> get "test_ts_ver", "row_1", { TIMESTAMP=> 100 }
COLUMN CELL
data:name timestamp=100, value=benyi_w
1 row(s) in 0.0120 seconds
hbase(main):060:0> get "test_ts_ver", "row_1", { TIMESTAMP=> 110 }
COLUMN CELL
data:name timestamp=110, value=benyi_1
1 row(s) in 0.0060 seconds
My questions:
1. When all those old versions will be removed?
2. Will compact or major_compact remove those old versions?
3. Is there a section/chapter talking about this behavior In HBase
Reference Guide?
Thanks.
Ben
