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From Alicia Leong <lccali...@gmail.com>
Subject Cassandra/MapReduce ‘Data Locality’
Date Fri, 29 Mar 2013 15:42:39 GMT
Hi All,

CfSplit that highlighted in RED* **, *in *d2t0053g*

But why it being submitted to *d2t0051g *not *d2t0053g ??*

Is this normal? Does this matter? In this case is no longer ‘Data Locality’
correct ?



 I’m using hadoop-1.1.2 & apache-cassandra-1.2.3.

TokenRange (1) >> 127605887595351923798765477786913079296 => 0

TokenRange (2) >> 85070591730234615865843651857942052864 =>
127605887595351923798765477786913079296

TokenRange (3) >> 42535295865117307932921825928971026432 =>
85070591730234615865843651857942052864

TokenRange (4) >> 0 => 42535295865117307932921825928971026432

ColumnFamilySplit((127605887595351923798765477786913079296, '-1] @[d2t0050g
])

ColumnFamilySplit((-1, '0] @[d2t0050g])

ColumnFamilySplit((85070591730234615865843651857942052864,
'127605887595351923798765477786913079296] @[d2t0053g])

ColumnFamilySplit((42535295865117307932921825928971026432,
'85070591730234615865843651857942052864] @[d2t0052g])

ColumnFamilySplit((0, '42535295865117307932921825928971026432] @[d2t0051g])



--------*RF1*-------

*d2t0050g *

KeyRange(start_token:127605887595351923798765477786913079296, end_token:-1,
count:4096)

*d2t0051g*

KeyRange(start_token:85070591730234615865843651857942052864,
end_token:127605887595351923798765477786913079296, count:4096)

Rowkey:3; columnvalue=Critics Choice Awards from
ColumnFamilySplit((85070591730234615865843651857942052864,
'127605887595351923798765477786913079296] @[d2t0053g])

KeyRange(start_token:117356732921465116845890410746976120467,
end_token:127605887595351923798765477786913079296, count:4096)

KeyRange(start_token:0, end_token:42535295865117307932921825928971026432,
count:4096)

Rowkey:1; columnvalue=Academy Awards from ColumnFamilySplit((0,
'42535295865117307932921825928971026432] @[d2t0051g])

Rowkey 2: columnvalue=Golden Globe Awards from ColumnFamilySplit((0,
'42535295865117307932921825928971026432] @[d2t0051g])

KeyRange(start_token:19847720572362509985402305765727304993,
end_token:42535295865117307932921825928971026432, count:4096)

*d2t0052g*

KeyRange(start_token:42535295865117307932921825928971026432,
end_token:85070591730234615865843651857942052864, count:4096)

KeyRange(start_token:-1, end_token:0, count:4096)

*d2t0053g*

Nil




Thanks in advance.

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