On Fri, Jun 1, 2012 at 12:28 PM, Harshvardhan Ojha
harshvardhan.o...@makemytrip.com wrote:
Problem statement:
We are keeping daily generated data(user generated content) in
Cassandra, but our application is using only 15 days old data. So how can
we archive data older than 15 days so
On Thu, May 31, 2012 at 9:31 AM, Curt Allred c...@mediosystems.com wrote:
No, these were not wide rows. They are rows that formerly had one or 2
columns. The columns are deleted but the empty rows dont go away, even
after gc_grace_secs.
The empty row goes away only during a compaction after
On Sat, Apr 14, 2012 at 1:57 PM, Igor i...@4friends.od.ua wrote:
Hi!
What is the difference between 'repair' and '-pr repair'? Simple repair
touch all token ranges (for all nodes) and -pr touch only range for which
given node responsible?
-pr only touches the primary range of the node. If
Did you hit the bug here?
https://issues.apache.org/jira/browse/CASSANDRA-4054
best regards,
坚果云 https://jianguopuzi.com/, 最简捷易用的云存储
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2012/3/30 Jonas Borgström jo...@borgstrom.se
Let me rephrase my question:
Is it true that deleted rows will still be present in the
On Tue, Dec 27, 2011 at 2:31 PM, Kevin Burton burtona...@gmail.com wrote:
I'm pleased to announce Peregrine 0.5.0 - a new map reduce framework
optimized
for iterative and pipelined map reduce jobs.
http://peregrine_mapreduce.bitbucket.org/
This originally started off with some internal
best regards,
韩竹(Zhu Han)
坚果铺子 https://jianguopuzi.com, 最简单易用的云存储
同步文件, 分享照片, 文档备份!
On Mon, Nov 21, 2011 at 11:07 PM, Dan Hendry dan.hendry.j...@gmail.comwrote:
Pretty sure your argument about indirect blocks making large files
inefficient only pertains to ext2/3 and not ext4. It seems ext4
I'd like to know whether it is possible to upgrade from 0.6.13 to 1.0.x
directly, either.
Is there anything we should notice that nodetool scrub might not fix?
On Wed, Nov 2, 2011 at 7:46 PM, Jake Maizel j...@soundcloud.com wrote:
Hello,
We run a medium sized cluster of 12 nodes on 0.6.13
On Sat, Aug 13, 2011 at 4:35 AM, Konstantin Naryshkin
konstant...@a-bb.netwrote:
Would you consider adding an RSS feed to the site for the benefit of those
who like to use feed readers to keep track of unread posts and what not?
Here it is: http://planetcassandra.org/aggregator/rss
-
On Wed, Aug 10, 2011 at 5:24 PM, aaron morton aa...@thelastpickle.comwrote:
I remember seeing this once before upgrading a system from 0.6 to 0.7 on a
Ubuntu EC2 (non data stax build) with EBS disks. I did the same thing and
just assumed it was an EBS or 0.6 bug. From memory after the upgrade
Chris,
I've deployed the patch to the cluster for two days. Everything is quite
good since then.
Thank you!
best regards,
韩竹(Zhu Han)
On Sat, Jul 30, 2011 at 3:52 AM, Chris Burroughs
chris.burrou...@gmail.comwrote:
Thanks to everyone who responded (I think I learned a few new tricks
from
On Thu, Jul 28, 2011 at 10:47 PM, Jian Fang
jian.fang.subscr...@gmail.comwrote:
Hi,
We have an old production Cassandra 0.6.8 instance without replica, i.e.,
the replication factor is 1. Recently, we noticed that
the snapshot data we took from this instance are inconsistent with the
running
Very helpful. Thank you!
best regards,
Zhu Han
On Thu, Jul 21, 2011 at 12:24 PM, Todd Burruss bburr...@expedia.com wrote:
I put together a blog post on Cassandra Storage Sizing so I don’t need to
keep figuring it out again and again. Hope everyone finds it useful, and
give feedback
2011/7/15 Zhu Han schumi@gmail.com
2011/7/15 Jonathan Ellis jbel...@gmail.com
If you have non-empty segments post-drain that is a bug. Is it
reproducible?
I think it is always reproducible on 0.6.x branch. Here is a simple
experiment:
Should I raise an issue ticket on it?
1
://issues.apache.org/jira/browse/CASSANDRA-2874
best regards,
韩竹(Zhu Han)
坚果铺子 https://jianguopuzi.com, 最简单易用的云存储
同步文件, 分享照片, 文档备份!
-1310702291383.log
2011/7/14 Zhu Han schumi@gmail.com:
Jonathan,
But all the old non-empty log segments are kept on the disk. And
cassandra
takes some time to apply the operations from these closed log segments
after
restart of the process.
Is it expected?
best regards,
韩竹(Zhu
On Wed, Jul 13, 2011 at 9:45 PM, Konstantin Naryshkin
konstant...@a-bb.netwrote:
Do you mean that it is using all of the available heap? That is the
expected behavior of most long running Java applications. The JVM will not
GC until it needs memory (or you explicitly ask it to) and will only
On Tue, Jul 5, 2011 at 8:58 AM, aaron morton aa...@thelastpickle.comwrote:
How do you change the name of a cluster? The FAQ instructions do not seem
to work for me - are they still valid for 0.7.5?
Is the backup / restore mechanism going to work, or is there a
better/simpler to copy data
best regards,
Zhu Han
On Sun, Apr 3, 2011 at 9:21 AM, Anurag Gujral anurag.guj...@gmail.comwrote:
Hi All,
I have loaded data into cassandra using batch processing the
response times for reads are in the range of 0.8 ms but I am using SSDs. so
I expect the read times to be even
On Thu, Feb 3, 2011 at 1:49 AM, Ryan King r...@twitter.com wrote:
On Wed, Feb 2, 2011 at 6:22 AM, Chris Burroughs
chris.burrou...@gmail.com wrote:
On 01/28/2011 09:19 PM, Chris Burroughs wrote:
Thanks Oleg and Zhu. I swear that wasn't a new hotspot version when I
checked, but that's
On Thu, Mar 17, 2011 at 10:27 AM, Zhu Han schumi@gmail.com wrote:
On Thu, Feb 3, 2011 at 1:49 AM, Ryan King r...@twitter.com wrote:
On Wed, Feb 2, 2011 at 6:22 AM, Chris Burroughs
chris.burrou...@gmail.com wrote:
On 01/28/2011 09:19 PM, Chris Burroughs wrote:
Thanks Oleg and Zhu. I
On Fri, Mar 11, 2011 at 10:40 AM, Erik Forkalsrud eforkals...@cj.comwrote:
I see the same behavior with smaller batch sizes. It appears to happen
when starting Cassandra with the defaults on relatively large systems.
Attached is a script I created to reproduce the problem. (usage: mutate.sh
On Wed, Jan 19, 2011 at 8:41 PM, Germán Kondolf german.kond...@gmail.comwrote:
On Wed, Jan 19, 2011 at 12:59 AM, Zhu Han schumi@gmail.com wrote:
On Wed, Jan 19, 2011 at 11:35 AM, Germán Kondolf
german.kond...@gmail.com
wrote:
Yes, that's what I meant, but correct me if I'm
If the tombstone is older than the row or column inserted later, is the
tombstone skipped entirely after compaction?
best regards,
hanzhu
On Wed, Jan 19, 2011 at 11:16 AM, Jonathan Ellis jbel...@gmail.com wrote:
If you mean that multiple tombstones for the same row or column should
be merged
I'm not clear here. Are you worried about the later inserted tombstone
prevents the whole row from being reclaimed and the storage space can not be
freed?
To my knowledge, after major compaction, only the row key and tombstone
are kept. Is it a big deal?
best regards,
hanzhu
On Tue, Jan
On Wed, Jan 19, 2011 at 11:35 AM, Germán Kondolf
german.kond...@gmail.comwrote:
Yes, that's what I meant, but correct me if I'm wrong, when a deletion
comes after another deletion for the same row or column will the gc-before
count against the last one, isn't it?
IIRC, after compaction. even
I met with native memory leak with OpenJDK. Still try to figure it out...
best regards,
hanzhu
On Wed, Dec 29, 2010 at 6:11 PM, Peter Schuller peter.schul...@infidyne.com
wrote:
Which is best?
Which is preferred?
If by GNU you mean the gcj stuff, then absolutely no. :)
If you mean
Eric,
Do you use the default GC settings? Can you show me the openJDK version by
java -version? Thank you!
If everything is the same, I suspect I need to upgrade the kernel.
best regards,
hanzhu
On Wed, Dec 29, 2010 at 11:44 PM, Eric Evans eev...@rackspace.com wrote:
On Wed, 2010-12-29 at
When the row is stored on disk as SSTable, the complexity of getting a row
is constant, as it always know where to get the row by in-memory indices.
When the row is stored in memory as memtable, it is stored as skip list[1].
The complexity is O(logN). N is the total number of rows in the skip
Yep. I forgot about the binary search part.
Thank you!
regards,
hanzhu
On Fri, Dec 24, 2010 at 9:35 PM, Jonathan Ellis jbel...@gmail.com wrote:
On Fri, Dec 24, 2010 at 4:42 AM, Zhu Han schumi@gmail.com wrote:
When the row is stored on disk as SSTable, the complexity of getting a
row
Can anybody recommend a stable enough JDK environment for 0.6.x branch on
ubuntu server?
Thank you!
best regards,
hanzhu
On Sun, Dec 19, 2010 at 10:29 AM, Zhu Han schumi@gmail.com wrote:
The problem seems still like the C-heap of JVM, which leaks 70MB every day.
Here is the summary
,
hanzhu
On Thu, Dec 16, 2010 at 9:28 PM, Zhu Han schumi@gmail.com wrote:
I've tried it. But it does not work for me this afternoon.
Thank you!
best regards,
hanzhu
On Thu, Dec 16, 2010 at 8:59 PM, Matthew Conway m...@backupify.comwrote:
Thanks for debugging this, I'm running
This bug is present in both Sun JDK and open JDK because they share the same
hotspot VM. Sun JDK got the fix earlier than open JDK.
best regards,
hanzhu
On Thu, Dec 16, 2010 at 6:43 PM, Jedd Rashbrooke
jedd.rashbro...@imagini.net wrote:
Hi Peter,
I've read through the Very high memory
Hi,
I have a test node with apache-cassandra-0.6.8 on ubuntu 10.4. The hardware
environment is an OpenVZ container. JVM settings is
# java -Xmx128m -version
java version 1.6.0_18
OpenJDK Runtime Environment (IcedTea6 1.8.2) (6b18-1.8.2-4ubuntu2)
OpenJDK 64-Bit Server VM (build 16.0-b13, mixed
:50 AM, Zhu Han schumi@gmail.com wrote:
Hi,
I have a test node with apache-cassandra-0.6.8 on ubuntu 10.4. The
hardware environment is an OpenVZ container. JVM settings is
# java -Xmx128m -version
java version 1.6.0_18
OpenJDK Runtime Environment (IcedTea6 1.8.2) (6b18-1.8.2-4ubuntu2
the instance.
best regards,
hanzhu
On Thu, Dec 16, 2010 at 1:00 PM, Zhu Han schumi@gmail.com wrote:
After investigating it deeper, I suspect it's native memory leak of JVM.
The large anonymous map on lower address space should be the native heap of
JVM, but not java object heap. Has anybody met
/bugdatabase/view_bug.do?bug_id=6824570
[2] http://blog.fuseyism.com/index.php/2010/09/10/icedtea6-19-released/
best regards,
hanzhu
On Thu, Dec 16, 2010 at 3:10 PM, Zhu Han schumi@gmail.com wrote:
The test node is behind a firewall. So I took some time to find a way to
get JMX diagnostic
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