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ace
> 56x10 bytes in my disk? Or data will be compressed?
>
> thx
>
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ormally this process takes around 42g and the fact
> that at the time of oom moment it was consuming 57g I am suspecting the
> java process to be the culprit rather than victim.
> > >
> > > At the time of issue there was no heap dump taken, I have configured
> it now. But
hem as seeds so your cluster can mostly manage itself, you can
say that's sad, but I'd say it's a small price to pay for all that you
don't have to do.
Steve
On Mon, May 1, 2017 at 4:55 PM, Roman Naumenko wrote:
> Lol yeah, why
> I guess I run some ec2 instances, drop some ca
; to our clients any opinions or advice contained in this Email are subject
> to the terms and conditions expressed in any applicable governing The Home
> Depot terms of business or client engagement letter. The Home Depot
> disclaims all responsibility and liability for the accuracy and co
?
By the way, there is no CQL-3.2.html file under
https://cassandra.apache.org/doc/cql3/
Thanks
Steve
—
"Surely, those who believe, those who are Jewish, the Christians, and the
converts; anyone who (1) believes in God, (2) believes in the Last Day, and (3)
leads a righteous life,
I think you’re right Tyler; the warning does not appear after making the
changes suggested by Bhuvan.
Steve
—
"Surely, those who believe, those who are Jewish, the Christians, and the
converts; anyone who (1) believes in God, (2) believes in the Last Day, and (3)
leads a righteous life,
from the
cassandra.yaml file:
The default value is the smaller of 8192, and 1/4 of the total space of
the commitlog volume.
Awesome, thanks again.
Steve
—
"Surely, those who believe, those who are Jewish, the Christians, and the
converts; anyone who (1) believes in God, (2) believ
about the
others. How do I confirm Cassandra is up and running OK?
Also, I notice when I shutdown Cassandra with ctrl-c, there is no message
indicating Cassandra is shutting down.
Am wondering if I should just install Cassandra using a RPM distribution from
DataStax.
Steve
—
"Surely,
Hi Lokesh,
Jack Krupansky sent an email to this list just this morning with all the
detail you should need to understand why this happens.
Steve
On Mon, Apr 18, 2016 at 4:38 PM, Lokesh Ceeba - Vendor <
lokesh.ce...@walmart.com> wrote:
> Hello Team
>
>
also happen with
different columns updated in separate statements. I'm not sure what your
circumstances are for the lost updates, so I'm not sure if these will help.
I'm only pointing it out because it was effective for my cases.
Steve
On Tue, Apr 5, 2016 at 3:21 PM, Mukil Kesavan
wrot
gt;
>> 2. Write a new load balancing policy that also uses the HostStateListener
>> for tracking host up and down messages, that essentially accomplishes
>> "sticky" request routing with failover to other nodes.
>>
>> Is option 2 the only clean way of accomplish
values to
relax some of this behavior under some circumstances, but I'm not sure as
to which version it affects or what the circumstances are. A similar
question was raised recently on this list, so the list archives may be of
some use.
Steve
On Wed, Mar 23, 2016 at 6:00 PM, Henry M wrote:
&
Hi Bo,
I would suggest adding:
.withReconnectionPolicy(new ExponentialReconnectionPolicy(1000,3))
or something similar to your cluster builder.
Steve
On Wed, Mar 16, 2016 at 11:18 AM, Bo Finnerup Madsen wrote:
> Hi Sean,
>
> Thank you for taking the time to answer :)
> We
Hi Bo,
You might try sending the same question to the java driver mailing list. I
haven't seen your particular error in several years of running Cassandra on
AWS. The closest I saw in the past was due to a protocol error in the
driver during the 2.0 beta timeframe.
Steve
On Wed, Mar 16, 20
.2.0):
> https://issues.apache.org/jira/browse/CASSANDRA-7304
>
> Adam
>
> On Tue, Mar 8, 2016 at 12:15 PM, Henry M wrote:
>
>> Thank you. It's probably not specific to prepared statements then and
>> just a more general statement. That makes sense.
>>
>>
y don't re-appear.
Steve
On Tue, Mar 8, 2016 at 9:36 AM, Henry Manasseh
wrote:
> The following article makes the following statement which I am trying to
> understand:
>
> *"Cassandra’s storage engine is optimized to avoid storing unnecessary
> empty columns, but w
Hi Jeff,
I'm going to go back and review your presentation. I missed it at Cassandra
Summit and didn't make it to re:Invent last year. The opinion I voiced was
from my own direct experience. Didn't mean to imply that there weren't
other good options available.
Thanks,
Steve
well.
> sure, technically, someone could use the legacy instances, but the question
> is what we should be recommending as best practice going forward.
>
> Yeah, the i2 instances look like the sweet spot for any non-EBS clusters.
>
> -- Jack Krupansky
>
> On Mon, Feb 1, 20
i2 series has good sized SSDs available, and has the advanced
networking option, which is also useful for Cassandra. The enhanced
networking is available with other instance types as well, as you'll see on
the feature list under each type.
Steve
On Mon, Feb 1, 2016 at 1:17 PM, Jack Krup
#x27;t a one-for-one
exchange with a JDBC driver. I'm not sure if this same level of confusion
occurs with other language drivers for Cassandra.
BTW, as Alex suggested earlier in the thread, this discussion should
probably be moved to the Java Driver mailing list.
Steve
On Fri, Jan 29, 2016 a
ort or not.
Steve
On Fri, Jan 29, 2016 at 10:13 AM, Jun Wu wrote:
> Hi Steve,
>
>Thank you so much for your reply.
>
>Yes, you're right, I'm using the version of 2.1. So based on this, I
> think I'm outdated.
>
> However, this comes to another int
d retries, so you would end up
duplicating what is already being done for you internally.
Steve
On Fri, Jan 29, 2016 at 9:11 AM, Jun Wu wrote:
> Hi there,
>
> I have some questions about the replicas selection.
>
> Let's say that we have 2 data centers: DC1 and DC2
a blob,
>> PRIMARY KEY (file_id, num)
>> );
>>
>> For your purposes you could modify the objects table to keep a revision
>> id or timeuuid for looking at previous versions. If you want some insight
>> into how the code worked give me a shout.
>>
>
>
>
> --
> -Richard L. Burton III
> @rburton
>
--
Steve Robenalt
Software Architect
sroben...@highwire.org
(office/cell): 916-505-1785
HighWire Press, Inc.
425 Broadway St, Redwood City, CA 94063
www.highwire.org
Technology for Scholarly Communication
ion and haven't found a case where I
needed another.
HTH,
Steve
On Tue, Dec 15, 2015 at 12:56 PM, Jonathan Haddad wrote:
> High volume updates to a single key in a distributed system that relies on
> a timestamp for conflict resolution is not a particularly great idea. If
> you ever
potential
impact on the Spark and/or Titan integration with Cassandra, rather than on
Cassandra itself.
Steve
On Tue, Dec 1, 2015 at 12:35 PM, james anderson
wrote:
> good evening;
>
> On 2015-12-01, at 21:17, Steve Robenalt wrote:
>
> Hi Tony,
>
> Somebody will likely prove me w
gain unless a way to exploit the
massive parallelism of the GPU effectively can be found.
Of course, GPU-driven analytics on the contents of the database opens up
all kinds of possibilities given the right kind of data...
Steve
On Tue, Dec 1, 2015 at 10:16 AM, Tony Anecito wrote:
> Hi All,
>
>
Hi Brian,
You can't unsubscribe using the mailing list email. There's a separate
email address for unsubscribing. You can find the unsubscribe email address
using the "Unsubscribe" link at the bottom of the page at
http://cassandra.apache.org
Steve
On Tue, Oct 27, 2015 at 4
d carefully reviewing the cassandra.yaml configuration
reference for ANY change you make from the default. As you've experienced
here, not all settings are intended to work together.
HTH,
Steve
On Fri, Oct 23, 2015 at 12:07 PM, Ajay Garg wrote:
> Any ideas, please?
> To repeat, we are us
Hi Graham,
I've used the Java driver's DowngradingConsistencyRetryPolicy for that in
cases where it makes sense.
Ref:
http://docs.datastax.com/en/drivers/java/2.1/com/datastax/driver/core/policies/DowngradingConsistencyRetryPolicy.html
Steve
On Fri, Oct 9, 2015 at 6:06 PM, Graham
endent on the nature of
the workload.
Steve
On Fri, Oct 9, 2015 at 12:36 PM, Brice Dutheil
wrote:
> On Fri, Oct 9, 2015 at 2:27 AM, Steve Robenalt
> wrote:
>
> In general, if you write at QUORUM and read at ONE (or LOCAL variants
>> thereof if you have multiple data centers
centers), your apps will work well
despite the theoretical consistency issues.
If you need better consistency guarantees, there's always the world of SQL
and distributed transactions...
Steve
On Thu, Oct 8, 2015 at 5:04 PM, Renato Perini
wrote:
> I'm asking because the DataStax D
Hi Ashish,
Most Json parsers expect either a raw long integer value or some version of
an iso-8601 date or timestamp.
See https://en.wikipedia.org/wiki/ISO_8601 for a good reference.
Steve
On Mon, Sep 28, 2015 at 1:08 PM, Russell Bradberry
wrote:
> That is not a valid date in CQL, and J
my LinkedIn picture.
Steve
On Tue, Sep 22, 2015 at 8:19 PM, Mohammed Guller
wrote:
> Hey everyone,
>
> I will be at the summit too on Wed and Thu. I am giving a talk on
> Thursday at 2.40pm.
>
>
>
> Would love to meet everyone on this list in person. Here is
lot more experienced than I am with Cassandra performance and may
have additional advice. There are also quite a few good papers and videos
on planet cassandra and the youtube channel regarding performance, storage,
data models and the interactions between them.
Hope that helps,
Steve
On Sun, Ma
Unsubscribe
What is it going to take to get my address off this list? You're instructions
are not working for me.
rmance and tuning if you want to know more.
Hope that helps,
Steve
On Thu, Jan 22, 2015 at 7:28 PM, Neha Trivedi
wrote:
> Hello Everyone,
> Thanks very much for the input.
>
> Here is my System info.
> 1. I have single node cluster. (For testing)
> 2. I have 4GB Memory
ted to the read timeouts.
Steve
On Thu, Jan 22, 2015 at 4:48 PM, Robert Coli wrote:
> On Thu, Jan 22, 2015 at 4:19 PM, Asit KAUSHIK
> wrote:
>
>> There are some values for read timeout in Cassandra.yaml file and the
>> default value is 3 ms change to a bigger value
Yes, I am aware there are no heads on an SSD. I also have seen plenty of
examples where compatibility issues force awkward engineering tradeoffs,
even as technology advances so I am jaded enough to be wary of making
assumptions, which is why I asked the question.
Steve
On Sep 4, 2014 5:50 PM
Thanks Robert! I am assuming that you meant that it's possible with a
single SSD, right?
On Thu, Sep 4, 2014 at 5:42 PM, Robert Coli wrote:
> On Thu, Sep 4, 2014 at 5:05 PM, Steve Robenalt
> wrote:
>
>> We are migrating a small cluster on AWS from instances based on spin
Thanks Rahul!
That was my inclination, but I don't want to take things like that for
granted. Anybody have a dissenting view?
Steve
On Thu, Sep 4, 2014 at 5:14 PM, Rahul Neelakantan wrote:
> With SSD one drive should be sufficient for both data and commitLogs.
>
> Rahul Neelak
avoid
issues with seek delays and contention for the disk heads. Since SSDs don't
have the same seek delays, is it still recommended to use 2 SSD drives? Or
is one sufficient?
Thanks,
Steve
m the switchover.
-- Steve
On Thu, May 24, 2012 at 1:28 PM, Brandon Williams wrote:
> On Thu, May 24, 2012 at 1:50 PM, Henrik Schröder
> wrote:
> > Ok. It's important for us to not have any downtime, so how about this
> > solution:
> >
> > We startup the Linux clu
est data out of Cassandra when you're test
suite finishes.
-- Steve
On Mon, Apr 23, 2012 at 8:41 AM, Conan Cook wrote:
> Hi,
>
> I'm experiencing a problem running a suite of integration tests on Windows
> 7, using Cassandra 1.0.9 and Java 1.6.0_31. A new cassandra inst
made large gains in simplifying the API. It has connection caching, load
balancing and failover build into its client.
I found it easy to use and stable. My code has been in production since
April 2011 and we've not had one Hector issue yet.
Hope that helps
Steve W.
On Fri, Jun 17, 2011 at
x27;s on a dual core, 2.66 GHz laptop, 4GB RAM...single running cassandra
nodehector (java) client.
Am I interpreting things correctly?
- Steve
On Tue, May 3, 2011 at 3:59 PM, aaron morton wrote:
> To give an idea, last March (2010) I run the a much older Cassandra on 10
> HP blades (dua
seconds.
Any tips would be appreciated.
- Steve
of clustering. If my experiment is correct, maybe this should be
mentioned on the wiki; or else the single node configuration should be
improved to at least work smoothly albeit slower.
On Wed, Jun 30, 2010 at 3:21 PM, Steve Lihn wrote:
> Jon,
> Looks like this compaction process to
x27;)]
INFO [COMPACTION-POOL:1] 2010-06-30 15:02:09,537 CompactionManager.java
(line 326) Compacted to /mnt/itops/cdata/TFO/CurrentHolding-197-Data.db.
1880884459/1880884459 bytes for 6306383 keys. Time: 360870ms.
On Wed, Jun 30, 2010 at 3:12 PM, Steve Lihn wrote:
> Jon,
> I am experimen
is is a one-node server with ms1G and mx2GB. The rest in
cassandra.in.share default I think.
Steve
On Wed, Jun 30, 2010 at 1:58 AM, Jonathan Ellis wrote:
> You could be seeing GC pauses. Did you increase the heap size you gave
> Cassandra, when you increased your VM size?
>
> On Tue
x27;t want to be bothered with opening up the firewall based on the IP I
have at that moment. So I am thinking to open up 9160 and use authentication
to block unauthorized writes, which may corrupt the database. But I couldn't
find any info on how to use SimpleAuthenticator in the scala client.
Searching how to use simple authentication in cascal. Couldn't find anything
in API docs. Does anybody know how to do it?
Thanks,
Steve
Mongo has it too. It could save a lot of development time if one can figure
out porting Mongo's query API and stored javascript to Cassandra.
It would be great if scala's list comprehension can be facilitated to write
query-like code against Cassandra schema.
On Thu, May 27, 2010 at 11:05 AM, Vick
r KeySpace (just like you
would choose hash or range partition for different table/data in RDBMS) ?
Thanks,
Steve
replication? Is there an automated conflict resolution
algorithm in Cassandra (which will likely cause data loss)? Or human
intervention is needed?
Steve
On Mon, May 24, 2010 at 11:51 AM, Joe Stump wrote:
> This is largely FUD. Cassandra let's you choose how consistent you want
> writes to b
dra cluster
can either lose data or become inconsistent ? (a node in a cluster crashes,
network partitions, I/O glitches, etc.)
Thanks,
Steve
This is an indexing question. If I have a structure like
RowKey => { Col => val }
is Col indexed (assuming I will have a lot of columns)?
On the other hand, if I have a structure like
RowKey => CF => { col => val }
which components are indexed in addition to RowKey?
Thanks,
Steve
Thanks for pointing this out. My fault in thinking Mongo is another
java-based database, which I will probably realize wrong when I attend the
mongo conference in a week.
On Fri, May 14, 2010 at 4:45 AM, David Strauss wrote:
> On 2010-05-13 19:48, Steve Lihn wrote:
> > Now the java com
Not sure how to comment on this concept. I guess it infers that the database
and application are no longer loosely coupled, but now strongly coupled.
I guess too, that java developers will vote yes, while database architect
and DBA will vote no.
In the "traditional" sense, enterprise data is the s
izing for that would be my goal.
> It does seem like Steve has more expansive attributes to track (e.g.
> sharesOutstanding) but just these could be in additional CFs.
>
>
> On Thu, May 13, 2010 at 3:58 PM, Benjamin Black wrote:
>
>> On Thu, May 13, 2010 at 12:45 PM, Mig
requirement is put on database schema design, the more burden is
put on the application to maintain data integrity. Why is this a good trend?
Can someone kindly explain?
Steve
On Thu, May 13, 2010 at 1:22 PM, Vijay wrote:
> "Cassandra requires the schema to be defined before the databas
I am not sure this is a good design in Cassandra.
What if I just want to get all the data points for AAPL? Since AAPL is not a
key, how does Cassandra get the data if I don't provide the years?
On Thu, Apr 29, 2010 at 1:09 AM, Schubert Zhang wrote:
> key : stock ID, e.g. AAPL+year
> column fam
r (or must choose) one rather than
the other between Design 1 and Design 2 ?
b. Are both queries possible (and comparable in speed) for the chosen design
?
Thanks,
Steve
On 06/04/2010 21:40, Benjamin Black wrote:
> I suggest the reasons you list (which are certainly great reasons!)
> are also the reasons there is no referential integrity or transaction
> support.
Quite. I'm not trying to make recommendations for how Cassandra should
be changed to be more like a
On 06/04/2010 18:53, Tatu Saloranta wrote:
>> I've read all about QUORUM, and it is generally useful, but as far as I
>> can tell, it can't give me a transaction...
>>
> Correct. Only individual operations are atomic, and ordering of
> insertions is not guaranteed.
>
As I thought.
> I think
On 06/04/2010 18:50, Benjamin Black wrote:
> I'm finding this exchange very confusing. What exactly about
> Cassandra 'looks absolutely ideal' to you for your project? The write
> performance, the symmetric, peer to peer architecture, etc?
>
Reasons I like Cassandra for this project:
* C
On 06/04/2010 15:26, Eric Evans wrote:
> On Tue, 2010-04-06 at 12:00 +0100, Steve wrote:
>
>> First, I apologise sending this to the 'dev' mailing list - I couldn't
>> find one for Cassandra users - and also for the basic nature of my
>> questions...
>&
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