Hi Vinay,
But regarding my earlier concern, calling get in case of delete request,
in order to check the time stamp, can we not query hbase directly using the
scanner avoiding the CP hooks..??
If you configure a CP to be called, HBase will call it. There isn't really
any way to avoid that. You
Because internally deleteColumn with LATEST_TIMESTAMP does a get to find
the exact latest version on which the delete applies we do a get. User
perspective it may not be needed but since a read happens on those blocks
where the latest version of the cell resides we have to know the metric.
Even
Hi Jean,
Thanks for your detailed info.
Now I understand the trace from where the CP hook is getting called.
But with this behavior of the delete request, don't you think there is a kind
of restriction to the delete request by the client.??
By restriction I meant, for an application which
Hi Vinay,
Coprocessors promess is to be called whenever there is a get, a delete, a
put, etc. So since deleteColumn do a get and a delete, I thinks it's
normal to get the 2 methods called.
If you can not change deleteColumn by deleteColumns, what you can do is, on
the delete hook, you can check
Hi Vinay,
I don't see anything wrong in the code which will not trigger the preDelete
hook when you do a delete with only the row key. It should be identical as
adding all the families.
Server side, this is the piece of code called when you are doing a
Delete(rowkey) with nothing else:
void
Hi Jean,
I rechecked the logic regarding delete with specifying only 'key', there was a
small mistake in the condition, I have corrected the same and now getting the
CP hook. Thanks for that.
But regarding my earlier concern, calling get in case of delete request, in
order to check the time
Hi Jean,
Thanks for your information.
I am using deleteColumn in my application. I will check the behavior once by
changing it to use deleteColumns as you suggested.
But is there any difference in the CP hooks for a delete request.?? Because, in
my CP I have implemented preDelete() and in
Hi Vinay,
In 0.94. When you call the deleteColumn:
public Delete deleteColumn(byte [] family, byte [] qualifier) {
this.deleteColumn(family, qualifier, HConstants.LATEST_TIMESTAMP);
return this;
}
You set the timestamp to LATEST_TIMESTAMP. Then on the server side, in
Thanks for the confirmatoin Ted ;) I figured that afterward that some
emails are not coming in the right order.
Vinay, can you please confirm the client call you are doing?
Thanks,
JM
2014-05-16 19:19 GMT-04:00 Ted Yu yuzhih...@gmail.com:
JMS:
I saw your earlier email.
There are some
Did anyone received the email I sent below? Based on the other emails,
seems not. So just re-sending.
JM
2014-05-15 8:24 GMT-04:00 Jean-Marc Spaggiari jean-m...@spaggiari.org:
Hi Vinay,
If you use deleteColumn (with no S), HBase need to first to a get to find
the last timeStamp, then do
Hi Vinay,
If you use deleteColumn (with no S), HBase need to first to a get to find
the last timeStamp, then do the delete. If you goal is to remove all the
versions of the specific column, you should use deleteColumns, which will
not all get.
JM
2014-05-13 10:16 GMT-04:00 Vinay Kashyap
Thanks for your reply Anoop,
In my application, I have only one version of a row. So requests are plain
delete requests without any concern about versions of a record.
we already handle this internal get op call not to invoke the pre/post Get
CP hook.
I am using 0.96.1.1 version
You are doing a latest version delete? When such a delete comes, (TS=
LATEST_TS) internally there will be a Get operation happening to get the
exact TS of the latest cell version. As part of that the CP hook also
getting called. File a jira so that we can discuss there whether an
internal call
Checking the code in detail, we already handle this internal get op call
not to invoke the pre/post Get CP hook.
-Anoop-
On Fri, May 16, 2014 at 9:45 AM, Anoop John anoop.hb...@gmail.com wrote:
You are doing a latest version delete? When such a delete comes, (TS=
LATEST_TS) internally there
JMS:
I saw your earlier email.
There are some emails in ASF queue being processed (backlog).
FYI
On Fri, May 16, 2014 at 5:05 AM, Jean-Marc Spaggiari
jean-m...@spaggiari.org wrote:
Did anyone received the email I sent below? Based on the other emails,
seems not. So just re-sending.
JM
Looking at RegionCoprocessorHost.java, preGetOp() is called in:
public boolean preGet(final Get get, final ListCell results)
Do you have stack trace showing that preGetOp() is called for delete
request ?
Thanks
On Mon, May 12, 2014 at 9:31 PM, Vinay Kashyap vinay_kash...@ymail.comwrote:
Dear all,
I am using HBase 0.96.1.1-hadoop2 with CDH-5.0.0.
I have an application where I have registered a coprocessor to my table to get
few statistics on the read/write/delete requests.
I have implemented preGetOp, prePut and preDelete accordingly and it is working
as expected in case of
Dear all,
I am using HBase 0.96.1.1-hadoop2 with CDH-5.0.0.
I have an application where I have registered a coprocessor to my table to get
few statistics on the read/write/delete requests.
I have implemented preGetOp, prePut and preDelete accordingly and it is working
as expected in case of
18 matches
Mail list logo
