Keys and values need to be base64 encoded in all non-binary representations,
XML and JSON currently.
Best regards,
- Andy
Problems worthy of attack prove their worth by hitting back. - Piet Hein (via
Tom White)
From: Ben West bwsithspaw...@yahoo.com
To:
I believe this is the latest status:
https://issues.apache.org/jira/browse/HIVE-1643?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
Suggest following up to d...@hive.apache.org and/or u...@hive.apache.org.
Best regards,
- Andy
Problems worthy of attack prove their
Try this: https://gist.github.com/1237770
See line 135.
Best regards,
- Andy
Problems worthy of attack prove their worth by hitting back. - Piet Hein (via
Tom White)
From: Shuja Rehman shujamug...@gmail.com
To: user@hbase.apache.org; Andrew Purtell
Some code seems licensed under the GPLv2, some under the LGPL.
Best regards,
- Andy
Problems worthy of attack prove their worth by hitting back. - Piet Hein (via
Tom White)
- Original Message -
From: OZAWA Tsuyoshi ozawa.tsuyo...@lab.ntt.co.jp
To: user@hbase.apache.org;
This is an occasional source of confusion.
Curious if anyone thinks that TTLs in milliseconds makes sense.
My opinion is no, of what practical use is data with a lifetime of 1, 10, or
100 ms?
- Original Message -
From: Jean-Daniel Cryans jdcry...@apache.org
To: user@hbase.apache.org
From: Shuja Rehman shujamug...@gmail.com
I am using bulk load to insert data into hbase. Its runs fine if I need to
insert in one table. But Now, I have the requirement in which I need to
insert data into more than one table.
We started some support for this
here:
Try
curl -v -X PUT \
http://localhost:8080/test/schema \
-H Accept: application/json \
-H Content-Type: application/json \
-d '{name:test,ColumnSchema:[{name:data}]}'
You should see:
PUT /test/schema HTTP/1.1
User-Agent: curl/7.21.3 (x86_64-pc-linux-gnu) libcurl/7.21.3
are not very clear then -- I've copied over the JSON from `GET
/table/schema` example (which contains `@name`, not `name` in the column
definition). I think adding examples for creating tables (and rows, for that
matter), would be very handy.
Karel
On 14.Sep, 2011, at 1:11 , Andrew Purtell wrote
From: Sandy Pratt prat...@adobe.com
TLDR: OpenJDK ~= Oracle JDK, so why not use it?
This advice is given out of an abundance of caution. Some have been burned in
production by bad JVM versions in the past. Oracle's 1.6.0_u18 is a
particularly egregious example, it will segfault all over the
While generalizations are dangerous, the one place when C++ code could
shine over java (JVM really) is one does not have to fight the GC.
Yes.
That being said, the folks working on hbase
have been actively been addressing this problem to the extent possible
in pure java by using unmanaged
Because keys in HBase are byte[], the REST interface base-64 encodes row key,
column name, and the value if you choose XML representation.
Though I do receive timestamp, but rest of column familes(info:name and
info:age) are not sent as a response.
You say you are looking for two values.
So the setup starts by recommending rolling your own hadoop (pain in the
ass). OR using a beta ( :( ).
CDH3 is not in beta. The latest version is release, CDH3U1.
I think most people at this point will just use CDH, so all of that about
rolling your own compile of Hadoop sources -- that is
From: Michael Segel michael_se...@hotmail.com
Can't we just all get along? :-)
My personal introduction to Cassandra came maybe in the 2009 timeframe. We
evaluated it and HBase at the time and chose HBase. No point to discuss why,
the world has changed many times over.
From there, my
We have both backported coprocessors to our 0.90-ish HBase (FrankenBase?) and
use them in production with security enabled -- HBASE-3025, but more recent
code than the patch on the issue. This code ported to HBase trunk is here:
https://github.com/trendmicro/hbase/tree/security
Backporting is
http://www.quora.com/How-does-HBase-write-performance-differ-from-write-performance-in-Cassandra-with-consistency-level-ALL
Thanks, that was what I was referring to earlier in this thread. Now bookmarked.
Comments there from those more knowledgable about Cassandra than I seem to
indicate that
Hi Chris,
Appreciate your answer on the post.
Personally speaking however the endless Cassandra vs. HBase discussion is
tiresome and rarely do blog posts or emails in this regard shed any light.
Often, Cassandra proponents mis-state their case out of ignorance of HBase or
due to commercial or
)
From: Sam Seigal selek...@yahoo.com
To: user@hbase.apache.org; Andrew Purtell apurt...@apache.org
Cc: hbase-u...@hadoop.apache.org hbase-u...@hadoop.apache.org
Sent: Tuesday, August 30, 2011 7:35 PM
Subject: Re: HBase and Cassandra on StackOverflow
A question inline:
On Tue, Aug 30
Hi Chris,
Would you mind if I paraphrase your responses on StackOverflow?
Go right ahead.
Best regards,
- Andy
Problems worthy of attack prove their worth by hitting back. - Piet Hein (via
Tom White)
From: Chris Tarnas c...@email.com
To: Andrew
on StackOverflow
On Aug 30, 2011, at 2:47 AM, Andrew Purtell wrote:
Better to focus on improving HBase than play whack a mole.
Absolutely. So let's talk about improving HBase. I'm speaking here as
someone who has been learning about and experimenting with HBase for more than
six months.
HBase
)
From: Sam Seigal selek...@yahoo.com
To: user@hbase.apache.org; Andrew Purtell apurt...@apache.org
Cc: hbase-u...@hadoop.apache.org hbase-u...@hadoop.apache.org
Sent: Wednesday, August 31, 2011 3:22 AM
Subject: Re: HBase and Cassandra on StackOverflow
Will the write call to HBase block
be in the write ahead log.
...joe
On Tue, Aug 30, 2011 at 9:17 AM, Andrew Purtell apurt...@apache.org wrote:
Is the replication strategy for HBase completely reliant on HDFS' block
replication pipelining ?
Yes.
Is this replication process asynchronous ?
No.
Best regards
Stuti,
2011-08-25 15:10:56,807 ERROR org.mortbay.log: /api/userstable
java.lang.RuntimeException: org.apache.hadoop.hbase.TableNotFoundException:
api
Whatever you are using to communicate with the HBase REST server was designed
for the previous version of it.
URLs to the REST interface no
We are running cdh3u0 hbase/hadoop suites on 28 nodes.
For your information, CDHU1 does contain this:
Author: Eli Collins e...@cloudera.com
Date: Tue Jul 5 16:02:22 2011 -0700
HDFS-1836. Thousand of CLOSE_WAIT socket.
Reason: Bug
Author: Bharath Mundlapudi
Ref:
Wow!
Best regards,
- Andy
Problems worthy of attack prove their worth by hitting back. - Piet Hein (via
Tom White)
- Original Message -
From: Sonal Goyal sonalgoy...@gmail.com
To: user@hbase.apache.org
Cc:
Sent: Monday, August 22, 2011 12:02 AM
Subject: Announcing Crux - a
From: Aravind Gottipati arav...@freeshell.org
imo, puppet is okay with configuration management tasks, but not really
great at
orchestrating a sequence of steps across multiple machines.
This is our experience as well.
We use Puppet to maintain a synchronized static configuration for the
When I was talking to someone the other day about the current TTL policy, he
was like WTF, who would want that, it eats your data?
I don't think anyone is well served by that kind of shallow analysis.
The TTL feature was introduced for the convenience of having the system
automatically
It's part of the mindset shift you have to go through coming from a database
world to a NoSQL world
This is useful. If you have more insights like this Ian and care to share them,
I think we would be really interested to hear them.
Best regards,
- Andy
Problems worthy of attack prove
Problems worthy of attack prove their worth by hitting back. - Piet Hein (via
Tom White)
From: lars hofhansl lhofha...@yahoo.com
To: Andrew Purtell apurt...@apache.org; user@hbase.apache.org
user@hbase.apache.org
Sent: Thursday, August 11, 2011 11:19 PM
Subject
)
- Original Message -
From: lars hofhansl lhofha...@yahoo.com
To: user@hbase.apache.org user@hbase.apache.org; Andrew Purtell
apurt...@apache.org
Cc:
Sent: Monday, August 8, 2011 7:53 PM
Subject: Re: Allow RegionCoprocessorEnvironment to register custom scanners?
I see.I just didn't see how
The RegionObserver already wraps all of the scanner operations.
RegionObserver.preScannerOpen can create an InternalScanner and return it
exactly as you propose with HRegionServer.addScanner(InternalScanner) .
preScannerOpen takes a Scan object.
Only if preScannerOpen does not return an
Have you tried Ganglia2?
http://sourceforge.net/apps/trac/ganglia/wiki/ganglia-web-2
Best regards,
- Andy
Problems worthy of attack prove their worth by hitting back. - Piet Hein (via
Tom White)
From: Otis Gospodnetic otis_gospodne...@yahoo.com
To:
Or is this a complete different thinking?
Yes.
There isn't an execution plan when using HBase, as that term is commonly
understood from RDBMS systems. The commands you issue against HBase using the
client API are executed in order as you issue them.
Depending on the access pattern, we might
.
I'll try out 0.90.4 when it's released.
Thanks,
Greg.
-Original Message-
From: Andrew Purtell [mailto:apurt...@apache.org]
Sent: Saturday, 23 July 2011 4:20 PM
To: user@hbase.apache.org
Subject: Re: Stargate: Only getting HTTP 200 responses in 0.90.x
We used to get
The REST API has filter support.
Strictly speaking the representation is multilanguage, but only the Java API --
the ScannerModel class, ScannerModel.stringifyFilter -- has support for
converting a Java filter tree into a JSON encoded representation of same.
However you could do this in Java
We used to get a 201 after creating a scanner with the scanner ID in
the Location property. We still get this packet with a valid scanner
ID but it's now an HTTP 200 packet.
The real problem is that we used to get an HTTP 204 when we exhausted the
scanner, but now we get an 200 packet
Allan,
Thanks for the bug report, analysis, and contribution. I will incorporate you
patches as part of HBASE-4116: https://issues.apache.org/jira/browse/HBASE-4116
Best regards,
- Andy
Problems worthy of attack prove their worth by hitting back. - Piet Hein (via
Tom White)
-
HBASE-2400 introduced a new connector contrib architecturally equivalent to the
Thrift connector, but using Avro serialization and associated transport and RPC
server work. However, it remains unfinished, was developed against an old
version of Avro, is currently not maintained, and is regarded
Message -
From: Arvind Jayaprakash w...@anomalizer.net
To: user@hbase.apache.org; Andrew Purtell apurt...@apache.org
Cc:
Sent: Monday, July 11, 2011 6:34 AM
Subject: Re: Hbase performance with HDFS
On Jul 07, Andrew Purtell wrote:
Since HDFS is mostly write once how are updates/deletes
IN_MEMORY means that HBase will try really hard to keep all of the data blocks
for a table in the block cache. Block cache is expired on a LRU basis in three
priority bands. Blocks for IN_MEMORY tables have the highest priority. They
will be the last to be evicted.
It does not mean data is
You can update existing data through manually triggering compaction. After you
make a change like this, go to the hbase shell and execute:
major_compaction 'yourtablename'
After major compaction all of the store files for the table will abide the most
recent schema settings.
Best regards,
Sorry that is:
major_compact 'tablename'
Typing too fast...
Best regards,
- Andy
Problems worthy of attack prove their worth by hitting back. - Piet Hein (via
Tom White)
- Original Message -
From: Andrew Purtell apurt...@apache.org
To: user@hbase.apache.org user
.
Best regards,
- Andy
Problems worthy of attack prove their worth by hitting back. - Piet Hein (via
Tom White)
From: Mohit Anchlia mohitanch...@gmail.com
To: user@hbase.apache.org; Andrew Purtell apurt...@apache.org
Sent: Thursday, July 7, 2011 11:53 AM
)
From: Mohit Anchlia mohitanch...@gmail.com
To: Andrew Purtell apurt...@apache.org
Cc: user@hbase.apache.org user@hbase.apache.org
Sent: Thursday, July 7, 2011 12:30 PM
Subject: Re: Hbase performance with HDFS
Thanks that helps! Just few more questions:
You mentioned about
Message-
From: Mohit Anchlia [mailto:mohitanch...@gmail.com]
Sent: Thursday, July 07, 2011 2:02 PM
To: user@hbase.apache.org; Andrew Purtell
Subject: Re: Hbase performance with HDFS
Thanks Andrew. Really helpful. I think I have one more question right
now :) Underneath HDFS replicates
Wayne,
Did you by chance have your NameNode configured to write the edit log to only
one disk, and in this case only the root volume of the NameNode host? As I'm
sure you are now aware, the NameNode's edit log was corrupted, at least the
tail of it anyway, when the volume upon which it was
earlier adequately conveyed the thought.
- Andy
From: Andrew Purtell apurt...@apache.org
To: user@hbase.apache.org user@hbase.apache.org
Cc:
Sent: Sunday, July 3, 2011 12:39 AM
Subject: Re: hbck -fix
Wayne,
Did you by chance have your NameNode configured to write the edit log
From: Stack st...@duboce.net
3. The size of them varies like this
70% from them have their length 1MB
29% from them have their length between 1MB and 10 MB
1% from them have their length 10MB (they can have also
100MB)
What David says above though
One reasonable way to handle native storage of large objects in HBase would
be to introduce a layer of indirection.
Do you see this layer on the client or on the server side?
Client side.
I was also thinking on the update: Le's say we store a new version of
the large object which is
HBase trunk will be 0.92.0 when released.
HBASE-2233 (Support both Hadoop 0.20 and 0.22) went into trunk on June 9th. I
have not personally tried it, though.
Best regards,
- Andy
Problems worthy of attack prove their worth by hitting back. - Piet Hein (via
Tom White)
- Original
I think the sender asked if HBASE-1861 is the right approach.
- Andy
- Original Message -
From: Stack st...@duboce.net
To: user@hbase.apache.org
Cc:
Sent: Monday, June 27, 2011 2:51 PM
Subject: Re: Multi-family support for Bulkload
On Sun, Jun 26, 2011 at 8:42 PM, Gan, Xiyun
From: Gan, Xiyun ganxi...@gmail.com
I still have another question, how to remove the partitions_$timpstamp
files produced in the HFileOutputFormat?
One option is to accept a configuration option for the partitions file:
- Path partitionsPath = new Path(job.getWorkingDirectory(),
-
From: Jack Zhang(jian) jack.zhangj...@huawei.com
Subject: Does anybody enable MSLAB in production system? I am not sure if it's
stable enough for production system?
Yes, we use it in production and have not observed any negative effects of its
use.
Best regards,
- Andy
Problems worthy
From: Andreas Neumann neun...@gmail.com
we will use LoadIncrementalHFiles, are you saying that this
will never cause a split?
Create the table with the region split threshold set to Long.MAX_VALUE and a
set of pre-split points that partitions the key space as evenly as possible.
Use HBase's
From: Andreas Neumann neun...@gmail.com
If we only load data in bulk (that is, via doBulkLoad(), not using
TableOutputFormat), do we still risk data loss? My understanding is
that append is needed for the WAL, and the WAL is needed only
for puts. But bulk loads bypass the WAL.
Correct.
If
From: Andreas Neumann neun...@gmail.com
I guess that includes region splits but also
reassignment of a region after its region server died.
If you are not writing, then you won't see splits.
Reassignment does involve writes to META but missing these is less serious than
missing a change in
From: Francis Christopher Liu fc...@yahoo-inc.com
Thanks for the warning, we'd like to stick with the ASF
releases of hadoop.
That's not really advisable with HBase. It's a touchy subject, the 0.20-ish
support for append in HDFS exists in production at some large places but isn't
in any ASF
From: Claudio Martella claudio.marte...@tis.bz.it
So, basically it's expensive to increment old data.
HBase employs a buffer hierarchy to make updating a working set that can fit in
RAM reasonably efficient. (But like I said there are some things remaining we
can improve in terms of internal
Hi Bill,
From: Bill Graham billgra...@gmail.com
Andy, I can see value in having ACLs on a per-column-pattern (or
maybe just per-prefix to make multiple pattern conflict resolution
simpler) basis. I know this isn't in scope for the initial release,
but would the current design lend itself to
Dean,
I am considering putting a Listlines in the Account
basically(ie. A column-family with n columns) and a
coprocessor then processes the line for that account(lots of
work is needed to be done here including checking the
Activity table which is a key of account-sequence so it is
This is from memory, but I expect someone will chime in if any detail is
inaccurate. :-)
If the blocks containing the values you are updating fit into blockcache then
read IOPS are avoided, satisfied from cache, not disk. Evictions from
blockcache are done on an LRU basis. (Packing related
From: Jason Rutherglen jason.rutherg...@gmail.com
Right thanks. I think replication is fairly simple, I don't know much
about the HDFS sync code, if one has sync'd on the HLog writer, then
an HLog reader should be able to read from there?
See my comments on HBASE-2357 regarding the
From: Hiller, Dean x66079 dean.hil...@broadridge.com
I would think most domains have a low write, high read rate
There are IN_MEMORY tables and blockcache in general for that.
with low number of rows in certain tables so I am kinda
surprised this optimization is not there.
Right, you want
From: Hiller, Dean x66079 dean.hil...@broadridge.com
Is there an example of LZO and is
that what I want customers to deliver as, correct? As
when LZO comes in and is layed over hadoop, it is split into
chunks on different nodes so I can decompress in parallel?
When you copy a big LZO
James,
You should refer to the HBase processes by their short class name at least. If
you execute 'jps' (java process list) on the command line, it will give you the
process ID and the short class name.
Region servers run as HRegionServer.
Masters run as HMaster.
ZooKeeper quorum peers, if
Stack,
Aside from the other ideas you mention, this could also be HBASE-3855 if a lot
of values are up in memstore?
By the way, I patched our 0.90-ish in house HBase with 3855 with no untoward
affects and noticeable improvement under profiling. Why not commit it to 0.90
as well?
Best
From: Stack st...@duboce.net
Also, I second what Andrew says where I do not know of
any place there the name of the jar is inscribed so how
the jar is named should play no role at all.
Maybe the name does matter. Do you think you ran into
the issue that Hari figured at the end of
We (at least I) was talking about the name of the Hadoop core jar in HBase lib/
being not of any particular importance.
Best regards,
- Andy
Problems worthy of attack prove their worth by hitting back. - Piet Hein (via
Tom White)
--- On Fri, 6/10/11, Mike Spreitzer mspre...@us.ibm.com
From: Ted Dunning tdunn...@maprtech.com
Lots of people are moving towards more spindles per box to
increase IOP/s
This is particular important for cases where the working
set gets pushed out of memory.
Indeed.
Our spec is more like 12x 500 GB SATA disks, to push IOPS and more evenly
Pardon if I've missed something but I think this thread comes down to:
On Mon, 6/6/11, Mike Spreitzer mspre...@us.ibm.com wrote:
So my suggestion is to be unequivocal about it: when running
distributed, always build your own Hadoop and put its -core
JAR into your HBase installation (or use
I recommend you look at Whirr:
http://incubator.apache.org/whirr/
specifically:
http://www.philwhln.com/run-the-latest-whirr-and-deploy-hbase-in-minutes
- Andy
If you are using security features of 0.20.203 (security != simple) then you
will need to do what J-D says about making sure the Hadoop jars are in sync
*and* use the version of HBase that works with secure Hadoop:
https://github.com/trendmicro/hbase/tree/security
Be advised this is HBase
Is *Hadoop 0.20.2 also not compatible with Hbase 0.90.3 ???*
In a strict sense they are, but without append support HBase cannot guarantee
that the last block of write ahead logs are synced to disk, so in some failure
cases edits will be lost. With append support then the hole of these
From: Henri Chenosky henri.cheno...@gmail.com
Subject: REST API doesn't support checkAndPut
To: user@hbase.apache.org
Date: Thursday, June 2, 2011, 9:52 PM
It seems that HTable atomic operations (e.g., checkAndPut and
checkAndDelete) are not supported by the current REST
implementation.
AM PDT Andrew Purtell wrote:
From: Henri Chenosky henri.cheno...@gmail.com
Subject: REST API doesn't support checkAndPut
To: user@hbase.apache.org
Date: Thursday, June 2, 2011, 9:52 PM
It seems that HTable atomic operations (e.g., checkAndPut and
checkAndDelete) are not supported
From: Jack Levin magn...@gmail.com
Hello, is there a git repo URL I could use to check out that
code version?
git://git.apache.org/hbase.git
or
git://github.com/apache/hbase.git
or
https://github.com/apache/hbase.git
Then checkout tag '0.90.3'
The hypervisor steals a lot of CPU time from m1.large instances. You should be
using c1.xlarge instances.
Are you using local storage or EBS?
Be aware that I/O performance on EC2 for any system is lower than if you are
using real hardware, significantly so if not using one of the instance
Do you have any preference for how this might be accomplished?
Best regards,
- Andy
Problems worthy of attack prove their worth by hitting back. - Piet Hein (via
Tom White)
--- On Wed, 5/25/11, Mark Jarecki mjare...@bigpond.net.au wrote:
From: Mark Jarecki mjare...@bigpond.net.au
I think I can speak for all of the HBase devs that in our opinion this vendor
benchmark was designed by hypertable to demonstrate a specific feature of
their system -- autotuning -- in such a way that HBase was, obviously, not
tuned. Nobody from the HBase project was consulted on the results or
For coprocessors you need to use trunk.
- Andy
--- On Tue, 5/24/11, Ted Yu yuzhih...@gmail.com wrote:
From: Ted Yu yuzhih...@gmail.com
Subject: Re: Any trigger like facility for HBase tables
To: user@hbase.apache.org
Cc: billgra...@gmail.com
Date: Tuesday, May 24, 2011, 1:48 PM
I don't
From: Jack Levin magn...@gmail.com
figured it out... the /etc/hosts file has ip to name, was used by
zookeeper was *.prod.imageshack.com, while hostname was
imgXX.imageshack.us... use by Regionserver/Master - Ideally, all
three components should source hostnames form same place, whether its
This is interesting because our conventional wisdom is those settings should
increase the chance of stop-the-world GC and should be avoided.
- Andy
(who always gets nervous when we start talking about GC black magic)
From: Jack Levin magn...@gmail.com
Subject: Re: GC and High CPU
To:
Furthermore, be sure to read about what HBase 0.90.x requires:
http://hbase.apache.org/notsoquick.html#requirements
Best regards,
- Andy
--- On Wed, 5/11/11, Andrew Purtell apurt...@apache.org wrote:
From: Andrew Purtell apurt...@apache.org
Subject: Re: Lost hbase table after restart
I agree.
We did get code back from an internal dev group for the secondary indexing
implementation but I don't think we are satisfied with its current state.
Also I have been swamped, therefore remiss, in online schema edit.
Shouldn't hold up a release on our account. Next one.
- Andy
Kazuki-san,
Setting the ZK timeout to a large value will stop the expirations but may not
provide sufficiently fast failure detection for your use case of course.
However if even Ganglia stops working during a large mapreduce job, I think you
need to question the adequacy of the network
From: Jason Rutherglen jason.rutherg...@gmail.com
With the new replication feature
of 0.92 edits are streamed from one cluster
to another
Interesting, what does 'cluster' mean in this context?
Cluster in this context is a typical data center deployment: HDFS + ZK + HBase
master(s) +
From: Jason Rutherglen jason.rutherg...@gmail.com
Andrew, thanks for the information. On the surface it looks like
HBASE-2357 would be using the same mechanism for streaming the WAL
(except the master slave failover) as HBASE-1295, however HBASE-2357
seems to imply that's not the case?
It
Jason,
Andrew, when you say this:
Because HBase is a DOT it can provide strongly consistent
and atomic operations on rows, because rows exist in only
one place at a time.
This excludes the use of HBase replication?
Yes.
With the new replication feature of 0.92 edits are streamed
From: Joe Pallas pal...@cs.stanford.edu
Could it be that your row key is not distributing the
data well enough?
That is, if your key is primarily based on the current
date, it will only put the data into a small number of
regions.
This, I have come to realize, is an essential
Hi Doug,
3) Cluster restart
We schedule a full shutdown and restart of our cluster each
week. It's pretty quick, and HBase just seems happier
when we do this.
Can you say a bit more about how HBase is happier versus not?
I can speculate on a number of reasons why this may be the case,
This sounds like HBASE-2014: https://issues.apache.org/jira/browse/HBASE-2014
BTW apologies for the weird English in that issue, it appears I cut and pasted
a request from our China development center without sufficient editing.
- Andy
Michael (and GotoMetrics),
Thank you for opening this up!
Best regards,
- Andy
Problems worthy of attack prove their worth by hitting back. - Piet Hein (via
Tom White)
--- On Wed, 4/13/11, Michael Dalton mwdal...@gmail.com wrote:
Hi all,
I'm with a startup, GotoMetrics, doing
We use JProfiler and connect to the remote VM via SSH tunnel. (Our testing is
done up in EC2.)
- Andy
From: Peter Haidinyak phaidin...@local.com
Subject: RE: cpu profiling
To: user@hbase.apache.org user@hbase.apache.org
Date: Monday, April 11, 2011, 8:51 AM
I've been using JProfiler
Head of branch-0.20-append is 0.20.3-SNAPSHOT
(http://svn.apache.org/viewvc/hadoop/common/branches/branch-0.20-append/build.xml)
- Andy
From: Jason Rutherglen jason.rutherg...@gmail.com
Subject: Re: Hadoop 0.20.3 Append branch?
To: apurt...@apache.org, hbase-u...@hadoop.apache.org
Date:
I've wondered if the master should not copy logs to some '.' prefix directory,
delete the original, then split the copies. Haven't thought through all of the
consequences though.
- Andy
--- On Fri, 4/8/11, Daniel Iancu daniel.ia...@1and1.ro wrote:
From: Daniel Iancu daniel.ia...@1and1.ro
table#setAutoFlush(false) ?
--- On Mon, 3/21/11, Buttler, David buttl...@llnl.gov wrote:
From: Buttler, David buttl...@llnl.gov
Subject: RE: HBase Stability
To: user@hbase.apache.org user@hbase.apache.org
Date: Monday, March 21, 2011, 1:46 PM
Have you seen Todd Lipcon's post on
MSLAB's?
Or use a bulk load process to import sequential data as new stores all in one
shot.
- Andy
--- On Sun, 3/20/11, Pete Haidinyak javam...@cox.net wrote:
From: Pete Haidinyak javam...@cox.net
Subject: Re: hash function per table
To: user@hbase.apache.org
Date: Sunday, March 20, 2011, 1:03
Whether to use REST or Thrift or Avro connectors is a matter of architecture,
depends what you are trying to do.
In all cases, we are here to help you if the system does not appear to function
normally. We rely on volunteer effort for this. It is unlikely someone will
volunteer time to help
This facility is not exposed in the REST API at the moment
(not that I know of -- please someone correct me if I'm
wrong).
Wrong. :-)
See ScannerModel in the rest package:
http://hbase.apache.org/apidocs/org/apache/hadoop/hbase/rest/model/ScannerModel.html
ScannerModel#setBatch
- Andy
We have a separate compression setting for major compaction vs store files
written during minor compaction (for background/archival apps).
Why not a separate compression setting for flushing? I.e. none?
--- On Mon, 3/14/11, Jean-Daniel Cryans jdcry...@apache.org wrote:
From: Jean-Daniel
Pardon, I'm not as familiar with this area as I should, but
apparently Hive queries run about x5
slower than queries that go against normal Hive tables.
Is this not a reasonable place to start? Why is this?
I was wondering if people think it would be possible to
implement HBase=Hive
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