Michael, this means read for every write?
On Friday, February 15, 2013, Michael Segel wrote:
What constitutes a duplicate?
An over simplification is to do a HTable.checkAndPut() where you do the
put if the column doesn't exist.
Then if the row is inserted (TRUE) return value, you push the
Hi,
We consider to update the version of Hbase.
The VM spec is below.
CPU:2 Core
MEMORY:4GB
We don't know the hardware spec of host server, because we owe the VM from a
VPS provider.
Additionally, I check vmstat for the time spanning the isuue.
No batch and online job worked on this server
Then maybe he can place an event in the same rowkey but with a column
qualifier which the time stamp of the event saved as long. Upon preCompact
in a region observer he can filter out for any row all column but the first?
On Friday, February 15, 2013, Anoop Sam John wrote:
When max versions set
Or may be go with large value for max version and put the duplicate entry. Now
in the compact, need to have a wrapper for InternalScanner and next() method
return only the 1st KV out, removing the others... Even while scan also same
kind of logic will be needed.. This will be good enough IMO
On Feb 15, 2013, at 3:07 AM, Asaf Mesika asaf.mes...@gmail.com wrote:
Michael, this means read for every write?
Yes and no.
At the macro level, a read for every write would mean that your client would
read a record from HBase, and then based on some logic it would either write a
record,
But then he can't trigger an event if its a net new row.
Methinks that he needs to better define the problem he is trying to solve.
Also the number of events. A billion an hour or 300K events a second? (Ok its
277.78K events a second.)
On Feb 14, 2013, at 10:19 PM, Anoop Sam John
Good to hear! Given your experience, I'd appreciate your feedback on the
section 6.3.6. Relationship Between RowKeys and Region Splits in...
http://hbase.apache.org/book.html#schema.creation
Š because it's on that same topic. Any other points to add to this?
Thanks!
On 2/14/13 11:08 PM,
I had tried checkAndPut yesterday with a null passed as the value and it had
thrown an exception when the row did not exist. Perhaps, I was doing something
wrong. Will try that again, since, yes, I would prefer a checkAndPut().
From: Michael Segel
Interesting.
Surround with a Try Catch?
But it sounds like you're on the right path.
Happy Coding!
On Feb 15, 2013, at 11:12 AM, Rahul Ravindran rahu...@yahoo.com wrote:
I had tried checkAndPut yesterday with a null passed as the value and it had
thrown an exception when the row did not
Hi
Is there a way to partition HDFS [replication factor, say 3]] or route requests
to specific RS nodes so that
One set of nodes serve operations like put and get etc.
Other set of nodes do MR on the same replicated data set
And those two sets don't share the same nodes?
I mean, If we are
Hi Stas,
Few options are coming into my mind.
Quickly:
1) Why not storing the products in specif columns instead of in the
same one? Like:
table, rowid1, cf:list, c:aa, value:true
table, rowid1, cf:list, c:bb, value:true
table, rowid1, cf:list, c:cc, value:true
table, rowid2, cf:list, c:aabb,
The slow response took about 1.5 minutes. During this period, did you
observe high latency ?
If you have Ganglia installed on master / NN node, do you observe abnormal
spike ?
BTW did you presplit your table ?
Thanks
On Fri, Feb 15, 2013 at 7:14 PM, Viral Bajaria viral.baja...@gmail.comwrote:
If you take a look at sar from 2013-02-16 on
10.149.10.10http://10.149.10.10:41017/ do
you see any major I/O wait, swapping, or anything out of the norm? Is this
occurring on all three region servers? When the perf test is running can
you verify you are writing to all three nodes?
On Fri, Feb
The HBase Team is pleased to announce the release of HBase 0.94.5.
Download it from your favorite Apache mirror [1].
HBase 0.94.5 is a bug fix release and has 76 issues resolved against it.
0.94.5 is the current stable release of HBase.
All previous 0.92.x and 0.94.x releases can upgraded to
Viral:
Did you use YCSB or LoadTestTool ?
Was the load spread relatively evenly across your servers ?
Thanks
On Fri, Feb 15, 2013 at 9:19 PM, Viral Bajaria viral.baja...@gmail.comwrote:
Yeah I noticed very high latency around the time of slow response,
basically my client timed out for those
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