We have an open issue for stuff similar to this
Atomic increment operations
https://issues.apache.org/jira/browse/HBASE-803
either that or use something like
memcache or scan the table.
Billy
"Lars George" <[EMAIL PROTECTED]> wrote in
message news:[EMAIL PROTECTED]
Hi,
I was wondering if there is a low cost (as in memory) and fast way to
check if a certain cell already exists? I need to insert a cell, but
based on if it was there before or not increase a counter (as in total
number of entries in a table). I see that HTable.get(...) returns the
byte array, means there are memory, reading and network streaming
involved. So if I do a
if (table.get(row, col) == null) { incr(counter); }
table.put(...);
this seems like a waste of resources and may not be as fast as a true
if (!table.exists(row, col)) { incr(counter); }
table.put(...)
It looks like this is easily doable since get() also delegates to the
region servers.
Am I missing something? Assuming HTable is sort of a Set implementation
I am confused as to way this check is missing.
Please advise.
Lars
