I have spend some time writing an app to load random data into HBASE
and record the performance from proof of concept type work.
My table definition:
//create 'webdata', {NAME => 'image'},{NAME => 'anchor'},{NAME => 'raw_data'}
hbase(main):003:0> scan 'webdata' ,{ LIMIT => 1 }
ROW COLUMN+CELL
http://www.Eleni.com/Achlam column=anchor:Alverta Angstrom
cathodegraph , timestamp=1259967232947, value=xkot
ydeae qtlx
http://www.Eleni.com/Achlam column=anchor:Polypoda abidingly ,
timestamp=1259967232947, value=fsenekwe
ydeae
http://www.Eleni.com/Achlam column=anchor:antimetropic Lecuona
ovariotomize , timestamp=1259967232947, value=
ydeae bq
http://www.Eleni.com/Achlam column=anchor:delightsomeness Egyptiac
archaism , timestamp=1259967232947, value=
ydeae http://www.mhtwhf.com/ppmgwhblg
http://www.Eleni.com/Achlam column=anchor:disrump Darach
unzealousness , timestamp=1259967232947, value=http:
ydeae //www.qso.com/mridqddt
http://www.Eleni.com/Achlam column=anchor:endoradiosonde Ursel ,
timestamp=1259967232947, value=http://www.sb
ydeae j.com/vplwkd
http://www.Eleni.com/Achlam column=anchor:gaw ,
timestamp=1259967232947, value=http://www.cpl.com/teaok
I wrote a Java scanner
-----------------------------------------
public static void main (String [] args) throws IOException {
HBaseConfiguration h = new HBaseConfiguration();
HTable table = new HTable("webdata");
Scan s = new Scan();
s.addFamily( Bytes.toBytes("anchor") );
ResultScanner scanner = table.getScanner(s);
int rowCount=0;
try {
for (Result rr:scanner){
rowCount++;
KeyValue [] kvs = rr.raw();
for (KeyValue kv : kvs){
System.out.println("col:"+new String(kv.getColumn()) );
System.out.println("fam:"+new String(kv.getFamily()) );
System.out.println("val:"+new String(kv.getValue()) );
}//end kv
} //end rr
----------------------------------------------
which returns as a first row correctly.
As does
s.addColumn( Bytes.toBytes("anchor") ); (without s.addFamily(
Bytes.toBytes("anchor") ); )
----------------------------------------------
col:anchor:Alverta Angstrom cathodegraph
fam:anchor
val:xkotqtlx
--------------------------------------------
Now i am trying other scanner addColumn methods with no results:
s.addColumn( Bytes.toBytes("anchor"), Bytes.toBytes("anchor") );
s.addColumn( Bytes.toBytes("anchor"),
Bytes.toBytes("anchor:Alverta Angstrom cathodegraph") );
s.addColumn( Bytes.toBytes("anchor"), Bytes.toBytes("Alverta
Angstrom cathodegraph") );
Any hints?
Thank you
