nt5large
> order by embeddings ANN OF [768 dimension vector] limit 20;
>
> Works fine - typically less than 5 seconds to return. Subsequent
> queries are even faster. If I'm activity adding data to the table, the
> searches can sometimes timeout (using cqlsh).
> If I ad
Happy new year, everyone!
Reminder, the Accelerate CFP closes in just over two weeks:
https://www.datastax.com/blog/2019/11/datastax-accelerate-20-call-papers-now-open
On Mon, Nov 11, 2019 at 1:28 PM Jonathan Ellis wrote:
> This spring DataStax kicked off Accelerate, a new conference carry
release are here
<https://www.datastax.com/blog/2019/12/tools-for-apache-cassandra>. *
--
Jonathan Ellis
co-founder, http://www.datastax.com
@spyced
x-accelerate-20-call-papers-now-open>
.
The CFP closes Jan 22. Hope to hear from you soon!
--
Jonathan Ellis
co-founder, http://www.datastax.com
@spyced
Which was followed up by
https://www.researchgate.net/profile/Akon_Dey/publication/282156834_Scalable_Distributed_Transactions_across_Heterogeneous_Stores/links/56058b9608ae5e8e3f32b98d.pdf
On Tue, Oct 16, 2018 at 1:02 PM Jonathan Ellis wrote:
> It looks like it's based on this
--
> > To unsubscribe, e-mail: user-unsubscr...@cassandra.apache.org
> > For additional commands, e-mail: user-h...@cassandra.apache.org
> >
>
> -
> To unsubscribe, e-mail: user-unsubscr...@cassandra.apache.org
> For additional commands, e-mail: user-h...@cassandra.apache.org
>
>
--
Jonathan Ellis
co-founder, http://www.datastax.com
@spyced
ublic
interfaces.
Of course additional security measures are useful as defense in depth, but
bottom line if the bad guys can't connect to your cluster they can't harm
it.
--
Jonathan Ellis
co-founder, http://www.datastax.com
@spyced
AND dclocal_read_repair_chance = 0.1 AND default_time_to_live = 0 AND
> gc_grace_seconds = 864000 AND max_index_interval = 10240 AND
> memtable_flush_period_in_ms = 360 AND min_index_interval = 10240 AND
> read_repair_chance = 0.0 AND speculative_retry = '99PERCENTILE' AND caching
committed for 3.4. In the meantime, I thought it best to give people more
notice rather than less.)
[1] https://issues.apache.org/jira/browse/CASSANDRA-10857
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder, http://www.datastax.com
@spyced
uot;128 GB or more"
than I expected.
- Including the "both" responses, a majority of users are deploying SSD now.
On Wed, Sep 30, 2015 at 1:18 PM, Jonathan Ellis wrote:
> With 3.0 approaching, the Apache Cassandra team would appreciate your
> feedback as we work on the proj
ur application." We have multiple applications
> using Cassandra. Are you looking for information about each application
> separately, or the sum of all of them?
>
> Jim
>
> On Wed, Sep 30, 2015 at 2:18 PM, Jonathan Ellis wrote:
>
>> With 3.0 approaching, the Apache Ca
a few minutes to fill it out!
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder, http://www.datastax.com
@spyced
;> instance, including cross-version repair.
>>
>> What will be the EOL policy for releases after 3.0? Given your example,
>> will 3.1 still see bugfixes at this point when I decide to upgrade to 3.7?
>>
> --
> --
> Daniel
>
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder, http://www.datastax.com
@spyced
As soon as 8099 is done.
On Thu, Jun 11, 2015 at 11:53 AM, Pierre Devops
wrote:
> Hi,
>
> 3.x beta release date ?
>
> 2015-06-11 16:21 GMT+02:00 Jonathan Ellis :
>
>> 3.1 is EOL as soon as 3.3 (the next bug fix release) comes out.
>>
>> On Thu, Jun 11,
sly from 3.1 to 3.7, for
> instance, including cross-version repair.
>
> What will be the EOL policy for releases after 3.0? Given your example,
> will 3.1 still see bugfixes at this point when I decide to upgrade to 3.7?
>
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-fo
intain the 2.2 stability series until 4.0 is
released, and 3.0 for six months after that.Thanks for reading this far,
and I look forward to hearing how 2.2rc1 works for you!*
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder, http://www.datastax.com
@spyced
to be in a
>> different keyspace from others? Is any sort of file fragmentation
>> potentially introduced just by doing this in a new keyspace as opposed
>> to an exiting one?
>>
>> 4) Does it add any metadata overhead to the system keyspace?
>>
>> 5) Why m
tps://issues.apache.org/jira/secure/attachment/12632583/CASSANDRA-6285-disruptor-heap.patch
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder, http://www.datastax.com
@spyced
t.
>
> flush_largest_memtables_at: 0.75
> reduce_cache_sizes_at: 0.85
> reduce_cache_capacity_to: 0.6
> in_memory_compaction_limit_in_mb: 64
>
> Does anyone have any ideas why we are seeing this so selectively on one box?
>
> Any cures???
> --
> John Pyeatt
> Singlewire Softwa
yaml configurations across versions, fetching binary
> cassandra from the internet), but it opens up new opportunities to developer
> complicated multi-node testing scenarios which are impossible due to
> re-entrant embedded cassandra code!
>
> Have fun.
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder, http://www.datastax.com
@spyced
rName(FBUtilities.java:469)
>
> at
> org.apache.cassandra.locator.AbstractReplicationStrategy.getClass(AbstractReplicationStrategy.java:290)
>
> at org.apache.cassandra.config.KSMetaData.fromSchema(KSMetaData.java:266)
>
> ... 6 more
>
>
>
>
>
> Thanks,
>
x27;t already on the
wiki contributors whitelist, please contact me. We had to add the
whitelist to stop spam.
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder, http://www.datastax.com
@spyced
lusters as well.
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder, http://www.datastax.com
@spyced
_on_write='true' AND
>> populate_io_cache_on_flush='false' AND
>> compaction={'class': 'SizeTieredCompactionStrategy'} AND
>> compression={'sstable_compression': 'SnappyCompressor'};
>>
>> cqlsh:cql3usage> select * from user;
>>
>> user_id
>> -
>> @mevivs
>>
>>
>>
>>
>>
>> I understand that, CQL3 and thrift interoperability is an issue. But this
>> looks to me a very basic scenario.
>>
>>
>>
>> Any suggestions? Or If anybody can explain a reason behind this?
>>
>> -Vivek
>>
>>
>>
>>
>>
>>
>
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder, http://www.datastax.com
@spyced
, as each row is not
> required to have the same set of columns. Columns and their metadata can be
> added by your application as they are needed without incurring downtime to
> your application.
>
> here: http://www.datastax.com/docs/1.2/ddl/index
>
> Is it a limitation of CQL3 and its connection vs. thrift?
> Or more likely i'm just doing something wrong?
>
> Thanks,
> Joe
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder, http://www.datastax.com
@spyced
ache, but does not tell me how to tune it.
>
> So, my question is, are there any optimizations that I can do to handle
> these large datatasets ?
>
> and why does my performance go back to normal when I restart Cassandra ?
>
> Thanks !
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder, http://www.datastax.com
@spyced
ore sense to just stuff into a relational
> database?
There's nothing wrong with the relational model per se (subject to the
usual explanation about needing to denormalize to scale). Cassandra
is about making applications scale, not throwing the SQL baby out with
the bathwater for the sak
s Cassandra because it perform I/O to
> insert data on disk and Cassandra also perform's I/O to insert data on
> commit log. Is commit log is less expensive ? I didn't really understood the
> magic :) Would you like to elaborate it more ?
>
> Thank you in advance
the columns limit is 20 billion, how can this
> be avoided. I do not understand how CQL3 unpacking helps in this situation?
>
> Sorry for any inconvenience :)
>
> Thanks a lot,
> Sam
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder, http://www.datastax.com
@spyced
? (we have been having to play with this setting a lot lately as too
> big and it gets slow yet too small and cassandra uses way too much RAM…we are
> still trying to find the right balance with this setting).
>
> Thanks,
> Dean
--
Jonathan Ellis
Project Chair, Ap
d?
>
> FYI, I'm following the instructions below, but only doing per column family
> backup and restore.
>
> http://www.datastax.com/docs/1.2/operations/backup_restore
>
> Thanks,
> Ron
>
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder, http://www.datastax.com
@spyced
svc.com/E2
(Want to go, but your company won't pay? Let me know off-list and
I'll see what I can do.)
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder, http://www.datastax.com
@spyced
The videos from the NYC* Big Data Tech Day are all up. I blogged
about my favorites here:
http://www.datastax.com/dev/blog/my-top-five-talks-from-nyc-big-data-tech-day
Good to meet the NYC community again!
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder, http://www.datastax.com
t; ‘new DecoratedKey(…)’ statement and is not using the partitioner function
> decorateKey(…).
>
>
>
> Would it be logical to always call the partitioner function decorateKey such
> that the creation of an own partitioner and key decoration is possible?
>
>
>
> Ign
See you there!
[1]
http://www.datastax.com/company/news-and-events/events/cassandrasummit2012/presentations
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder, http://www.datastax.com
@spyced
map tasks instead of
> 2,560?
>
>
> On Fri, Mar 29, 2013 at 10:28 AM, Jonathan Ellis wrote:
>>
>> I still don't see the hole in the following reasoning:
>>
>> - Input splits are 64k by default. At this size, map processing time
>> dominates job creat
1.2.3 & edited the cassandra.yaml for vnodes.
>>
>> When I execute a M/R job .. the console showed HUNDRED of Map tasks.
>>
>> May I know, is the normal since is vnodes? If yes, this have slow the M/R
>> job to finish/complete.
>>
>>
>> Thanks
>
>
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder, http://www.datastax.com
@spyced
cts the performance since
>> the range queries have a lot of overhead.
>>
>> Any suggestion to improve the performance? It seems like I need to lower the
>> number of virtual nodes.
>>
>> Best Regards,
>> Cem
>>
>>
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder, http://www.datastax.com
@spyced
p://www.datastax.com/dev/blog/atomic-batches-in-cassandra-1-2
> [6]: http://www.datastax.com/dev/blog/tracing-in-cassandra-1-2
> [7]:
> http://www.datastax.com/dev/blog/performance-improvements-in-cassandra-1-2
> [8]: http://www.datastax.com/dev/blog/binary-protocol
> [9]: http://ww
; > I'm running 1.1.5; the bug says it's fixed in 1.0.9/1.1.0.
>> >
>> > How can I check to see why it keeps running HintedHandoff?
>> you have tombstone is system.HintsColumnFamily use list command in
>> cassandra-cli to check
>>
>
>
>
> --
>
> Mike Heffner
> Librato, Inc.
>
>
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support
http://www.datastax.com
I am readind the code wrong?
>
> Also if this is correct, look like if the third node is in other DC, the
> read will slow down even when the consistency was TWO?
>
> Thanks,
> Sankalp
>
>
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax,
not working with 1.1.5.
>
> -Vivek
>
> On Mon, Oct 22, 2012 at 5:20 AM, aaron morton
> wrote:
>
> Yes AFAIK.
>
> Cheers
>
> -----
> Aaron Morton
> Freelance Developer
> @aaronmorton
> http://www.thelastpickle.com
>
> On 20/10/2012, at 12:15 AM, Vivek Mishra wrote:
>
> Hi,
> Is it possible to reuse same compound primary key after delete? I guess it
> works fine for non composite keys.
>
> -Vivek
>
>
>
>
>
>
>
>
>
>
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support
http://www.datastax.com
r in any other place
> where this could be useful ?
Good idea, I'll get that noted. Thanks!
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support
http://www.datastax.com
en flushed.
Replaying already-flushed data a second time is harmless -- except for
counters. So, to avoid replaying flushed counter data, we recommend
performing drain when shutting down the pre-1.1.6 C* prior to upgrade.
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataSta
250M that I observed in the behavior of my
> application ? What about later releases of Cassandra (e.g. 1.1, or 1.2) ? Is
> there any option to help on this front ?
>
> Thanks in advance for any pointers that you can provide to help me understand
> this issue.
>
> B
e had any experience with this ? Anyone tried it ?
>
> --
> Regards,
> Oleg Dulin
> NYC Java Big Data Engineer
> http://www.olegdulin.com/
>
>
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support
http://www.datastax.com
e a dynamic
> column family is to create a table with no named columns and alter the
> table later but that also does not work:
>
> "create table data (key varchar PRIMARY KEY);"
>
> yields:
>
> "Bad Request: No definition found that is not part of the PRIMAR
Bloom Filter Space Used: 41104
> Compacted row minimum size: 150
> Compacted row maximum size: 179
> Compacted row mean size: 179 *
>
> I am unable to see the effect of above setcachecapacity command. Let me
> know how i can configure the cache capacity, and check it
Yes.
On Thu, Aug 2, 2012 at 5:33 AM, Radim Kolar wrote:
>
>> 1) I assume that I have to call the loadNewSSTables() on each node?
>
> this is same as "nodetool refresh?"
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for profe
ve a little over weeks
to send in your talk proposal. Don't put it off! We'll look forward to
seeing some great ones shortly!
Thanks
Nick
(On behalf of the Conferences committee)
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support
http://www.datastax.com
lease take five minutes and submit your nomination today at [2].
Nominations will be open throughout the next week. Those selected
will be notified in advance.
[1] http://www.datastax.com/events/cassandrasummit2012
[2] http://www.surveymonkey.com/s/WVBZGHR
--
Jonathan Ellis
Project Chair, Apache
More information at
http://www.datastax.com/services/training
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support
http://www.datastax.com
at
> org.apache.cassandra.io.sstable.SSTableMetadata$SSTableMetadataSerializer.deserialize(SSTableMetadata.java:204)
> at
> org.apache.cassandra.io.sstable.SSTableMetadata$SSTableMetadataSerializer.deserialize(SSTableMetadata.java:194)
> at
> org.apache.cassandra.io.sstable.SSTableReader.open(SSTableReader.java:155)
> at
> org.apache.cassandra.io.sstable.SSTableReader$1.run(SSTableReader.java:224)
> at
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
> at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
> at java.util.concurrent.FutureTask.run(FutureTask.java:138)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> at java.lang.Thread.run(Thread.java:662)
> Service exit with a return value of 100
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support
http://www.datastax.com
dn't
improve our safety margin since you'd basically need to rewrite the
patch.
On Sun, Jul 1, 2012 at 6:40 AM, Joost Van De Wijgerd wrote:
> Hi Jonathan,
>
> Looks good, any chance of porting this fix to the 1.0 branch?
>
> Kind regards
>
> Joost
>
> Sent f
ASSANDRA-4399 to fix this.
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support
http://www.datastax.com
10 00
> Fax: (33) 1 58 56 10 01
>
> http://www.octo.com
> Octo Talks! http://blog.octo.com
>
>
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support
http://www.datastax.com
7,000
> tasks still pending. No more tasks will be executed until I start another
> test and the 7000 pending will never be executed.
>
> I'm using leveled compaction with 5MB SS tables and my tests have a 50:50
> read:write ratio. Each value is a 10K byte array with random conten
nd
>> property 'commitlog_rotation_threshold_in_mb' on class: org.apache.
>> cassandra.config.Config
>> at org.yaml.snakeyaml.constructor.
>> Constructor$ConstructMapping.getProperty(Constructor.java:342)
>> at org.yaml.snakeyaml.constructor.
>&
cfstats in 1.1.0? I can see them in 1.0.8 but not 1.1.0. If so,
> was wondering why, as they're fairly useful :)
>
> Bill
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support
http://www.datastax.com
.datastax.com/dev/blog/schema-in-cassandra-1-1
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support
http://www.datastax.com
8026790552830793920833138736,
> 31333430383431363030303030):ColumnFamily(queue.idxRecvTimeRange
> [7878323239537570657254616e67307878:true:4@1340870382109010,])
> DEBUG [MutationStage:10] 2012-06-28 15:59:42,193 KeysIndex.java (line 103)
> removed index entry for cleaned-up value DecoratedKey(test,
> 74657374):ColumnFamily(queue.idxServiceProvider
> [7878323239537570657254616e67307878:true:4@1340870382109007,])
> DEBUG [MutationStage:10] 2012-06-28 15:59:42,193 RowMutationVerbHandler.java
> (line 56) RowMutation(keyspace='drc',
> key='7878323239537570657254616e67307878', modifications=[ColumnFamily(queue
> -deleted at 1340870382185000- [])]) applied. Sending response to
> 6553@/192.168.0.3
> DEBUG [ReadStage:17] 2012-06-28 15:59:42,198 CollationController.java (line
> 77) collectTimeOrderedData
> DEBUG [ReadStage:17] 2012-06-28 15:59:42,199 ReadVerbHandler.java (line 58)
> Read key 7878323239537570657254616e67307878; sending response to
> 6556@/192.168.0.3
>
> BRs
> //Ares
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support
http://www.datastax.com
The default
> being what's there now.
>
> Also, in the current version the live ration can never adjust downwards, I
> see you guys have already made a fix for this in 1.1 but I have not seen it
> on the 1.0 branch.
>
> Let me know what you think
>
> Kind regards,
>
> Joost
>
> --
> Joost van de Wijgerd
> joost.van.de.wijgerd@Skype
> http://www.linkedin.com/in/jwijgerd
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support
http://www.datastax.com
No.
(Moving to user list.)
On Jun 28, 2012 8:17 AM, "Fábio Caldas" wrote:
> It´s possible to use distinct on cql?
>
> --
> Atenciosamente,
> Fábio Caldas
>
een.com
>
> The information contained in this e-mail is for the exclusive use of the
> intended recipient(s) and may be confidential, proprietary, and/or legally
> privileged. Inadvertent disclosure of this message does not constitute a
> waiver of any privilege. If you receive this message in error, please do
> not directly or indirectly print, copy, retransmit, disseminate, or
> otherwise use the information. In addition, please delete this e-mail and
> all copies and notify the sender.
--
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co-founder of DataStax, the source for professional Cassandra support
http://www.datastax.com
t;> Dear distinguished colleagues:
>>
>> I don't want all of my CFs cached, but one in particular I do.
>>
>> How can I configure that ?
>>
>> Thanks,
>> Oleg
>>
>
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support
http://www.datastax.com
nt of expired data (default 20%). So you
won't have to force a major for this use case anymore.
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support
http://www.datastax.com
Adform: watch this short video <http://vimeo.com/adform/display>
> [image: Adform News] <http://www.adform.com>
>
> Disclaimer: The information contained in this message and attachments is
> intended solely for the attention and use of the named addressee and may be
> confid
Correction: the first compaction after expiration + gcgs can remove
it, even if it hasn't been turned into a tombstone previously.
On Tue, May 22, 2012 at 9:37 AM, Jonathan Ellis wrote:
> Additionally, it will always take at least two compaction passes to
> purge an expired column:
s compacted bytes
> total progress
>
> Compaction MapData007 HOS 11518215662
> 532355279724 2.16%
>
>
>
> And when I ls the directory I find this:
>
> -rw-rw-r--. 1 cassandra cassandra 3.9G May 22 14:12
> /data/MapData007/H
012 at 12:04 AM, Tamil selvan R.S
>> wrote:
>>>
>>> Hi,
>>> Is there a tutorial or reference on CQL 3.0 Features. In cassandra
>>> download site the reference is still pointing to 2.0
>>> Specifically Composite Types
>>> Regards,
>>> Tamil.s
>>
>>
>
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support
http://www.datastax.com
May 15 20:51
>> > /var/lib/cassandra/data/blotter/twitter_users/twitter_users.json
>> >
>> > [root@cassandra-n6 blotter]# ls -al
>> >
>> > /var/lib/cassandra/data/blotter/twitter_users/snapshots/1337115022389/twitter_users.json
>> > -rw-r--r-- 1 root root 38778 May 15 20:50
>> >
&g
ker(ThreadPoolExecutor.java:1110)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
> at java.lang.Thread.run(Thread.java:722)
> Caused by: java.io.EOFException
> at
> org.apache.cassandra.io.sstable.IndexHelper.skipIndex
quot; compaction on the 3 nodes
>
> =Rob
> [1] https://issues.apache.org/jira/browse/CASSANDRA-1983
>
> --
> =Robert Coli
> AIM>ALK - rc...@palominodb.com
> YAHOO - rcoli.palominob
> SKYPE - rcoli_palominodb
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support
http://www.datastax.com
makemytrip.com/signature/images/facebook-icon.gif]<http://www.facebook.com/pages/MakeMyTrip-Deals/120740541030?ref=search&sid=10077980239.1422657277..1>
> *Facebook*
>
> [image: Description:
> http://www.mailmktg.makemytrip.com/signature/images/twitter-icon.gif]<http://
ssandra.io.util.FileUtils.createDirectory(FileUtils.java:131)
> at
> org.apache.cassandra.db.ColumnFamilyStore.snapshotWithoutFlush(ColumnFamilyStore.java:1409)
> ... 7 more
>
>
> Also i see that in snapshort dir already exists
> 1337242754356-purchase_history
ed: more efficient snapshots
>> and advising the OS when file operations should not be cached.
>>
>> Our environment is virtualized, and the disks are actually SAN through
>> fiber channels, so I don't know if that has impact on performance as well.
>>
>> memory speed > network speed
>>
>> -
>> Aaron Morton
>> Freelance Developer
>> @aaronmorton
>> http://www.thelastpickle.com
>>
>>
>
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support
http://www.datastax.com
lper can only set one output column family. Is there a way
> that I can set multiple column families in one keyspace and output data to
> all the cfs?
>
>
> Thx
> Shawna
>
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support
http://www.datastax.com
ons-in-where-clause-tp7486344p7486344.html
> Sent from the cassandra-u...@incubator.apache.org mailing list archive at
> Nabble.com.
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support
http://www.datastax.com
implications?
> Thanks,
>
> *Tamar Fraenkel *
> Senior Software Engineer, TOK Media
>
> [image: Inline image 1]
>
> ta...@tok-media.com
> Tel: +972 2 6409736
> Mob: +972 54 8356490
> Fax: +972 2 5612956
>
>
>
>
--
Jonathan Ellis
Project Chair
ots of places
where we explicitly allow arbitrary Java code to be injected into
Cassandra. You don't need native code to do dangerous things with
that!
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support
http://www.datastax.com
On Mon, Apr 30, 2012 at 2:11 PM, Patrik Modesto
wrote:
> I think the problem is somehow connected to an IntegerType secondary
> index.
Could be, but my money is on the supercolumns in the HH data model.
Can you create a jira ticket?
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-f
which does depend on
> JNA.
mlockall does depend on JNA, but we only lock the JVM itself in
memory. The OS is free to page data files in and out as needed.
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support
http://www.datastax.com
nes.
>>
>> Then, any subsequent pass that includes A *and all other sstables
>> containing rows with the same key* will drop the tombstones.
>
> thats why i proposed to attach TTL to entire CF. Tombstones would not be
> needed
--
Jonathan Ellis
Project Chair, Apache C
efinedCompaction?
If you want them all compacted together into one big sstable, yes.
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support
http://www.datastax.com
consistency level is also set to ONE.
> -The max heap size and new heap size is set to 4G and 800M(I tried without
> setting them as well)
> -Java is run in the interpreted mode(-Xint)
> -I'm using user mode linux
>
> Any pointers to what I might be doing wrong will be very helpfu
gt;>> -/+ buffers/cache: 7901296 16832368
>>>>> Swap: 1998840 2352 1996488
>>>>>
>>>>>
>>>>> And swap space slowly grows, but i misunderstand why?
>>>>>
>>>>>
>>>>> PS: We have JNA mlock, and set vm.swappiness = 0
>>>>> PS: OS ubuntu 10.0.4(2.6.32-40-generic)
>>>>>
>>>>>
>>>>
>>>
>>>
>>>
>>> --
>>> With kind regards,
>>>
>>> Robin Verlangen
>>> www.robinverlangen.nl
>>>
>>
>
>
>
> --
> With kind regards,
>
> Robin Verlangen
> www.robinverlangen.nl
>
>
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support
http://www.datastax.com
On Sun, Apr 15, 2012 at 2:47 PM, sj.climber wrote:
> Also, I see in 1.0.9 there's a fix for a potentially related issue (see
> https://issues.apache.org/jira/browse/CASSANDRA-4023). Any thoughts on
> this?
My thought is, upgrading is a no-brainer if that's a pain point for yo
pages?
>
> Thanks,
> Omid
>
> [1] http://pubs.opengroup.org/onlinepubs/007908799/xsh/mlockall.html
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support
http://www.datastax.com
ime T and
> probably passed gc_grace period, so it shoould be wiped at any compaction on
> table A.
Any compaction pass over A will first convert the TTL data into tombstones.
Then, any subsequent pass that includes A *and all other sstables
containing rows with the same key* will drop th
On Sat, Apr 14, 2012 at 3:27 AM, Radim Kolar wrote:
> forceUserDefinedCompaction would be more usefull if you could do compaction
> on 2 tables.
You absolutely can. That's what the "user defined" part is: you give
it the exact list of sstables you want compacted.
--
J
vailable using the 11x branch (see
>> http://wiki.apache.org/cassandra/DebianPackaging).
>>
>> Thank you for your help in testing and have fun with it.
>>
>> [1]: http://goo.gl/XwH7J (CHANGES.txt)
>> [2]: http://goo.gl/JocLX (NEWS.txt)
>> [3]: https://issues.apache.org/jira/browse/CASSANDRA
>> [4]: user@cassandra.apache.org
>> [5]:
>> http://git-wip-us.apache.org/repos/asf?p=cassandra.git;a=shortlog;h=re
>> fs/tags/cassandra-1.1.0-rc1
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support
http://www.datastax.com
Index Type: KEYS
> Compaction Strategy:
> org.apache.cassandra.db.compaction.LeveledCompactionStrategy
> Compression Options:
> sstable_compression: org.apache.cassandra.io.compress.SnappyCompressor
>
> Is it a bug? If not, how can we tune Cassandra to avoid this?
>
> Regards,
>
> Romain
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support
http://www.datastax.com
apidshare/querycache-hc-19706-Data.db,/var/lib/cassandra/data/rapidshare/querycache-hc-19707-Data.db,/var/lib/cassandra/data/rapidshare/querycache-hc-19708-Data.db,/var/lib/cassandra/data/rapidshare/querycache-hc-19709-Data.db,/var/lib/cassandra/data/rapidshare/querycache-hc-19710-Data.db,/var/lib/cass
rg.apache.cassandra.net.IncomingTcpConnection.run(IncomingTcpConnection.java:81)
>
> This one sounds like a null key added to the SSTable at some point,
> but I'm rather confident I'm checking for key nullity.
The stacktrace indicates an error with the very first key in the
ss
ot;.
> Could this be having an impact since we continually add and remove columns
> even while a major compact is executing?
>
>
> Thanks,
> Ross
>
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support
http://www.datastax.com
to complete and takes about the same amount of time
> whether the limit is 1, 100 or 1000.
>
>
> Thanks for any help,
> Chris
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support
http://www.datastax.com
the column’s name)?
>
> --
> View this message in context:
> http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/column-s-timestamp-tp7429905p7429905.html
> Sent from the cassandra-u...@incubator.apache.org mailing list archive at
> Nabble.com.
>
>
> -
> franc.car...@sirca.org.au | www.sirca.org.au
>
> Tel: +61 2 9236 9118
>
> Level 9, 80 Clarence St, Sydney NSW 2000
>
> PO Box H58, Australia Square, Sydney NSW 1215
>
>
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support
http://www.datastax.com
5) of its size, and this range will get increased with sstable age. -
> 1 month old will have range for example (0.2 - 1.8).
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support
http://www.datastax.com
w it got like that is another question. What was the schema change ?
>>
>> Cheers
>>
>>
>
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support
http://www.datastax.com
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