, caching, pooling, etc) of Cassandra 1.X.
Right now i come to know that following client exists:
1) Hector(Java)
2) Thrift (Java)
3) Kundera (Java)
With Regards,
Amit
--
Aaron Turner
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http://tcpreplay.synfin.net/ - Pcap editing and replay tools
or subsequent compaction activity? All my CF's I'll be writing to
use compression and leveled compaction.
Right now my Cassandra data store has about 4 months of data and we
have 5 years of historical (not sure yet how much we'll actually load
yet, but minimally 1 years worth).
Thanks!
--
Aaron
because of the rather poor performance
characteristics SC's have.
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Aaron Turner
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Those who would give up essential Liberty, to purchase a little temporary
Safety, deserve
.
--
Aaron Turner
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http://tcpreplay.synfin.net/ - Pcap editing and replay tools for Unix Windows
Those who would give up essential Liberty, to purchase a little temporary
Safety, deserve neither Liberty nor Safety.
-- Benjamin Franklin
carpe diem
. All trademarks are the property of
their respective owners.
--
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http://tcpreplay.synfin.net/ - Pcap editing and replay tools for Unix Windows
Those who would give up essential Liberty, to purchase a little temporary
Safety, deserve
, 2012 at 7:03 AM, Edward Capriolo edlinuxg...@gmail.com wrote:
You can consider adding -pr. When iterating through all your hosts
like this. -pr means primary range, and will do less duplicated work.
On Mon, Aug 27, 2012 at 8:05 PM, Aaron Turner synfina...@gmail.com wrote:
I use cron. On one box
everywhere.
Yep.
Secondly, what's the need for sleep 120?
just give the cluster a chance to settle down between repairs...
there's no real need for it, just is there because.
--
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writes. I would strongly suggest 3 nodes per DC if you care
about consistent reads. Generally speaking, 3 nodes per-DC is
considered the recommended minimum number of nodes for a production
system.
--
Aaron Turner
http://synfin.net/ Twitter: @synfinatic
http://tcpreplay.synfin.net
On Mon, Sep 10, 2012 at 10:17 PM, Morantus, James (PCLN-NW)
james.moran...@priceline.com wrote:
Hey folks,
Can you recommend any tools to pull data from MySQL and pump it to
Cassandra?
This: http://www.datastax.com/dev/blog/bulk-loading
--
Aaron Turner
http://synfin.net/ Twitter
that compactions take less space in the
future meaning we can buy less nodes?
Thanks,
Dean
--
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http://tcpreplay.synfin.net/ - Pcap editing and replay tools for Unix Windows
Those who would give up essential Liberty, to purchase a little
developers 5-10MB seems far more reasonable. I guess it
really depends on your usage patterns, but that seems excessive to me-
especially as sstables are promoted.
--
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http://tcpreplay.synfin.net/ - Pcap editing and replay tools
CF more
often and reducing the gc_grace time so that compaction has a better
chance of removing stale data from disk.
--
Aaron Turner
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http://tcpreplay.synfin.net/ - Pcap editing and replay tools for Unix Windows
Those who would give up essential
reasonable then 512MB.
-Aaron
2012/9/23 Aaron Turner synfina...@gmail.com
On Sun, Sep 23, 2012 at 8:18 PM, Віталій Тимчишин tiv...@gmail.com
wrote:
If you think about space, use Leveled compaction! This won't only allow
you
to fill more space, but also will shrink you data much faster
On Tue, Sep 25, 2012 at 10:36 AM, Віталій Тимчишин tiv...@gmail.com wrote:
See my comments inline
2012/9/25 Aaron Turner synfina...@gmail.com
On Mon, Sep 24, 2012 at 10:02 AM, Віталій Тимчишин tiv...@gmail.com
wrote:
Why so?
What are pluses and minuses?
As for me, I am looking
are reminded that
the information remains the property of the sender. You must not use,
disclose, distribute, copy, print or rely on this e-mail. If you have
received this message in error, please contact the sender immediately and
irrevocably delete this message and any copies.
--
Aaron
On Thu, Sep 27, 2012 at 7:35 PM, Marcelo Elias Del Valle
mvall...@gmail.com wrote:
2012/9/27 Aaron Turner synfina...@gmail.com
How strict are your security requirements? If it wasn't for that,
you'd be much better off storing data on a per-statistic basis then
per-device. Hell, you could
4000
Cfs with no issue that I see yet.
Dean
On 9/27/12 11:10 AM, Aaron Turner
synfina...@gmail.commailto:synfina...@gmail.com wrote:
On Thu, Sep 27, 2012 at 3:11 PM, Hiller, Dean
dean.hil...@nrel.govmailto:dean.hil...@nrel.gov
wrote:
We have 1000's of different building devices and we
??
Thanks,
Dean
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Aaron Turner
http://synfin.net/ Twitter: @synfinatic
http://tcpreplay.synfin.net/ - Pcap editing and replay tools for Unix Windows
Those who would give up essential Liberty, to purchase a little temporary
Safety, deserve neither Liberty nor Safety.
-- Benjamin
(this should really be an automated/schedulable
thing)???
I use a cron job. It's a good idea to use the '-pr' flag btw. Also,
you only need to run repair against CF's which actually have deletes.
--
Aaron Turner
http://synfin.net/ Twitter: @synfinatic
http://tcpreplay.synfin.net/ - Pcap editing
, then the data can come back. Repair just
guarantees that all the nodes that should of gotten the tombstones got
them.
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http://tcpreplay.synfin.net/ - Pcap editing and replay tools for Unix Windows
Those who would give up essential
that gives you some ideas to investigate further!
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http://tcpreplay.synfin.net/ - Pcap editing and replay tools for Unix Windows
Those who would give up essential Liberty, to purchase a little temporary
Safety, deserve neither Liberty nor
sstable size per CF and force cassandra to make smaller tables,
they
expire faster.
--
Aaron Turner
http://synfin.net/ Twitter: @synfinatic
http://tcpreplay.synfin.net/ - Pcap editing and replay tools for Unix
Windows
Those who would give up essential Liberty, to purchase a little
- rc...@palominodb.com
YAHOO - rcoli.palominob
SKYPE - rcoli_palominodb
--
Aaron Turner
http://synfin.net/ Twitter: @synfinatic
http://tcpreplay.synfin.net/ - Pcap editing and replay tools for Unix
Windows
Those who would give up essential Liberty, to purchase a little temporary
response is that various people run in production
with Java 7 and it seems to work. :)
=Rob
--
=Robert Coli
AIMGTALK - rc...@palominodb.com
YAHOO - rcoli.palominob
SKYPE - rcoli_palominodb
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can I retrieve this timestamp column using Hector client?
Thanks in advance!
Renato M.
--
Aaron Turner
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http://tcpreplay.synfin.net/ - Pcap editing and replay tools for Unix Windows
Those who would give up essential Liberty, to purchase
is this
specifically for?
Thanks again for the help!
Renato M.
2013/1/15 Aaron Turner synfina...@gmail.com:
I don't think so. Usually you'd use either a Time-UUID or something
like epoch time as the column name to get a range of columns by time
range.
On Tue, Jan 15, 2013 at 10:46 AM, Renato Marroquín
/p/cassandra-jdbc/
Thanks,
Matt
--
Aaron Turner
http://synfin.net/ Twitter: @synfinatic
http://tcpreplay.synfin.net/ - Pcap editing and replay tools for Unix Windows
Those who would give up essential Liberty, to purchase a little temporary
Safety, deserve neither Liberty nor Safety
want to do some searches and see if you can find the project
and learn anything from that.
--
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http://synfin.net/ Twitter: @synfinatic
http://tcpreplay.synfin.net/ - Pcap editing and replay tools for Unix Windows
Those who would give up essential Liberty, to purchase a little
? Possibly. What are the disadvantages? Well
it depends on a bunch of things you haven't told us.
--
Aaron Turner
http://synfin.net/ Twitter: @synfinatic
http://tcpreplay.synfin.net/ - Pcap editing and replay tools for Unix Windows
Those who would give up essential Liberty
with 4TB of
data. Typically, people around here seem to recommend ~400GB, but
that depends on hardware.
Honestly, for the price of a single computer you could test this
pretty easy. That's what I'd do.
--
Aaron Turner
http://synfin.net/ Twitter: @synfinatic
http://tcpreplay.synfin.net/ - Pcap
almost literally zero I/O
associated with a snapshot. Backing up all that data off the system
is a different story, but at least it's large sequential reads which
is pretty well optimized.
--
Aaron Turner
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http://tcpreplay.synfin.net/ - Pcap editing
'+'
Column names are Long's, hence the INT = INT + INT
Ideas?
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http://tcpreplay.synfin.net/ - Pcap editing and replay tools for Unix Windows
Those who would give up essential Liberty, to purchase a little temporary
Safety, deserve
...@gmail.com wrote:
Try quoting the column name.
On Tue, Jul 12, 2011 at 5:30 PM, Aaron Turner synfina...@gmail.com wrote:
Using Cassandra 0.8.1 and cql 1.0.3 and following the syntax mentioned
in https://issues.apache.org/jira/browse/CASSANDRA-2473
cqlsh UPDATE RouterAggWeekly SET 1310367600
'+'
Frankly, I'm about ready to open a ticket against 0.8.1 saying
CQL/Counter support does not work at all.
Or is there a trick which isn't documented in the ticket? I tried
reading the Java code referred to in ticket #2473, but i'm over my
head.
On Tue, Jul 12, 2011 at 6:46 PM, Aaron Turner synfina
---
RowKey: 1_20110728_ifoutmulticastpkts
= (counter=12, value=16)
= (counter=1310367600, value=34)
---
RowKey: 1
= (counter=1, value=10)
2 Rows Returned.
[default@test]
--
Aaron Turner
http://synfin.net/ Twitter: @synfinatic
http
heard that fixing this issue is hard. I've assumed this
to mean don't expect a fix anytime soon. Is that accurate?
Beginning to start having second thoughts that Cassandra is the right
fit for my project which would heavily rely on counters to roll up
aggregates.
--
Aaron Turner
http://synfin.net
. :(
--
Aaron Turner
http://synfin.net/ Twitter: @synfinatic
http://tcpreplay.synfin.net/ - Pcap editing and replay tools for Unix Windows
Those who would give up essential Liberty, to purchase a little temporary
Safety, deserve neither Liberty nor Safety.
-- Benjamin Franklin
carpe diem quam
On Mon, Jul 25, 2011 at 11:24 AM, Sylvain Lebresne sylv...@datastax.com wrote:
On Mon, Jul 25, 2011 at 7:35 PM, Aaron Turner synfina...@gmail.com wrote:
On Sun, Jul 24, 2011 at 3:36 PM, aaron morton aa...@thelastpickle.com
wrote:
What's your use case ? There are people out there having good
Cassandra has to read all the supercolumns anyways, so storing as json
requires less overhead.
--
Aaron Turner
http://synfin.net/ Twitter: @synfinatic
http://tcpreplay.synfin.net/ - Pcap editing and replay tools for Unix Windows
Those who would give up essential Liberty, to purchase a little
and want us to include the link, let us know.
Feedback is always welcome.
Thanks!
Hector Team.
--
Aaron Turner
http://synfin.net/ Twitter: @synfinatic
http://tcpreplay.synfin.net/ - Pcap editing and replay tools for Unix Windows
Those who would give up essential Liberty, to purchase
Seems fine now.
2011/10/13 Patricio Echagüe patric...@gmail.com:
Hi Aaron. does it still happen ? We didn't set up any password on the page.
On Tue, Oct 11, 2011 at 9:15 AM, Aaron Turner synfina...@gmail.com wrote:
Just a FYI:
http://hector-client.org is requesting a username/pass
http
efficient. If you need to update your bitmasks regularly,
you're probably better off with the second solution.
Wrap a little API around this and you have fast and direct access to
know if a given IP should be filtered or not.
--
Aaron Turner
http://synfin.net/ Twitter: @synfinatic
http
. I am learning on
the job so to speak.
Thank you kindly for any comments or pointers.
# Cassandra store properties
# keyspace=
# name=
# class=
# qualifier=
# family=
# type=
# cluster=
# host=
--
Lewis
--
Aaron Turner
http://synfin.net/ Twitter: @synfinatic
http
1. Basic SQL-like summary transforms for both CQL and Thrift API clients like:
SUM
AVG
MIN
MAX
2. Native 64bit UNsigned datatype
3. Add support for matching column names via LIKE (% and _ wildcards)
for ascii type
--
Aaron Turner
http://synfin.net/ Twitter: @synfinatic
http
external. At its core was get
and put.
Did I miss something in my reading of intent?
-Sarah
-Original Message-
From: Aaron Turner [mailto:synfina...@gmail.com]
Sent: Sunday, November 06, 2011 8:25 AM
To: user@cassandra.apache.org
Subject: Re: Second Cassandra users survey
1. Basic SQL
Haven't found this in the docs yet, but is the TTL the number of
seconds in the future to expire? Unix epoch time to expire?
something else?
--
Aaron Turner
http://synfin.net/ Twitter: @synfinatic
http://tcpreplay.synfin.net/ - Pcap editing and replay tools for Unix Windows
Those who
--
Aaron Turner
http://synfin.net/ Twitter: @synfinatic
http://tcpreplay.synfin.net/ - Pcap editing and replay tools for Unix Windows
Those who would give up essential Liberty, to purchase a little temporary
Safety, deserve neither Liberty nor Safety.
-- Benjamin Franklin
carpe diem quam
for the server to do, but
the client could do that. I really don't care too much about
performance since this is a debugging/diagnostics tool.
--
Aaron Turner
http://synfin.net/ Twitter: @synfinatic
http://tcpreplay.synfin.net/ - Pcap editing and replay tools for Unix Windows
Those who would give up
, I'm working on a strategy of moving forward.
If the tombstones do cause such problem, where should I be looking for
performance bottlenecks?
Is it disk, CPU or something else? Thing is, I don't see anything
outstanding in my Ganglia plots.
TIA,
Maxim
--
Aaron Turner
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business is big data start with it from the get go?
- how would you do map/reduce with Cassandra? how agile is that? (for
example, can you run map/reduce _very_ frequently?)
Thanks!
--
Dotan, @jondot
--
Aaron Turner
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http://tcpreplay.synfin.net
on
the Rails side, not Hector/Cassandra which has been pretty rock solid
so far in my testing).
I basically wrote my own custom ORM on top of Hector. It's not AR
compliant or anything like that and pretty application specific.
Mostly it just tries to simplify the Hector API.
--
Aaron Turner
http
On Wed, Dec 7, 2011 at 3:59 PM, Christof Bornhoevd cbornho...@gmail.com wrote:
Hi All,
I'm using Cassandra 1.0.3. Can I have (simple) Columns and SuperColumns
within the same row of a SuperColumnFamily?
Nope. Personally, i avoid super columns all together.
--
Aaron Turner
http
, I'm not sure I would recommend JRuby+Hector if this is the
only reason you'd use JRuby over MRI, but if you might find the
plethora of Java libraries useful it's definitely worth looking into.
--
Aaron Turner
http://synfin.net/ Twitter: @synfinatic
http://tcpreplay.synfin.net/ - Pcap editing
-threaded? The single threaded performance of
Cassandra isn't at all impressive and it really is designed for
dealing with a lot of simultaneous requests.
--
Aaron Turner
http://synfin.net/ Twitter: @synfinatic
http://tcpreplay.synfin.net/ - Pcap editing and replay tools for Unix Windows
.
--
Aaron Turner
http://synfin.net/ Twitter: @synfinatic
http://tcpreplay.synfin.net/ - Pcap editing and replay tools for Unix Windows
Those who would give up essential Liberty, to purchase a little temporary
Safety, deserve neither Liberty nor Safety.
-- Benjamin Franklin
carpe diem quam
On Wed, May 2, 2012 at 8:22 AM, Tim Wintle timwin...@gmail.com wrote:
On Tue, 2012-05-01 at 11:00 -0700, Aaron Turner wrote:
Tens or a few hundred MB per row seems reasonable. You could do
thousands/MB if you wanted to, but that can make things harder to
manage.
thanks (Both Aarons
for ways to
parallelize my requests and it scales pretty much linearly.
--
Aaron Turner
http://synfin.net/ Twitter: @synfinatic
http://tcpreplay.synfin.net/ - Pcap editing and replay tools for Unix Windows
Those who would give up essential Liberty, to purchase a little temporary
Safety
need to get multiple stats per user, I just use more threads on
the client side. I'm not using composite row keys (it's just
AsciiType) as that can lead to hotspots on disk. My timestamps are
also just plain unix epoch's as that takes less space then something
like TimeUUID.
--
Aaron Turner
this?
--
Aaron Turner
http://synfin.net/ Twitter: @synfinatic
http://tcpreplay.synfin.net/ - Pcap editing and replay tools for Unix Windows
Those who would give up essential Liberty, to purchase a little temporary
Safety, deserve neither Liberty nor Safety.
-- Benjamin Franklin
carpe
to the first edition and it would be great to see
that type of participation again.
Thank you,
Edward
--
Aaron Turner
http://synfin.net/ Twitter: @synfinatic
http://tcpreplay.synfin.net/ - Pcap editing and replay tools for Unix Windows
Those who would give up essential Liberty
I'm not sure how much it
matters.
--
Aaron Turner
http://synfin.net/ Twitter: @synfinatic
http://tcpreplay.synfin.net/ - Pcap editing and replay tools for Unix Windows
Those who would give up essential Liberty, to purchase a little temporary
Safety, deserve neither Liberty nor Safety
space requirements (before replication) went from over
1.1TB/year to 305GB/year.
--
Aaron Turner
http://synfin.net/ Twitter: @synfinatic
http://tcpreplay.synfin.net/ - Pcap editing and replay tools for Unix Windows
Those who would give up essential Liberty, to purchase a little
this period of time then how
do we get that information? do we scan through each node row as we will have
row for each node?
thanks
-Aaron Turner synfina...@gmail.com wrote: -
To: user@cassandra.apache.org
From: Aaron Turner synfina...@gmail.com
Date: 08/09/2012 07:38PM
Subject: Re
Curious, but does cassandra store the rowkey along with every
column/value pair on disk (pre-compaction) like Hbase does? If so
(which makes the most sense), I assume that's something that is
optimized during compaction?
--
Aaron Turner
http://synfin.net/ Twitter: @synfinatic
http
sstable file.
That is, in the spesial case where you get sstable file per column/value, you
are correct, but normally, I guess most of us are storing more per key.
Regards,
Terje
On 11 Aug 2012, at 10:34, Aaron Turner synfina...@gmail.com wrote:
Curious, but does cassandra store the rowkey
sstable.
See http://wiki.apache.org/cassandra/MemtableSSTable
On Sat, Aug 11, 2012 at 11:03 AM, Aaron Turner synfina...@gmail.com wrote:
So how does that work? An sstable is for a single CF, but it can and
likely will have multiple rows. There is no read to write and as I
understand it, writes
between webservers and cassandra cluster, in
terms of the performance of individual requests and in the volumes of
connections handled per second
c) Ease of development and and deployment.
What worked for you, and why? What didn't work for you?
--
Aaron Turner
http://synfin.net
. Perhaps there's even an open source project or two
implementing this sorta thing? I've found flewton
(https://github.com/flewton/flewton), which is possibly relevant, but
my Java skills are pretty non-existent so I'm having a hard time
figuring it out.
Thanks,
Aaron
--
Aaron Turner
http
being maintained well...
how's the ruby API overall? stable? performance?
Thanks!
--
Aaron Turner
http://synfin.net/ Twitter: @synfinatic
http://tcpreplay.synfin.net/ - Pcap editing and replay tools for Unix Windows
Those who would give up essential Liberty, to purchase a little
error. Now 'list CF' in CLI does not return any data as followings:
list User;
Using default limit of 100
Input length = 1
I don't see any errors or exceptions in the log.
If I run CLi from 0.7.0 against 0.7.4 server, I am getting data.
Thanks
--
Aaron Turner
http
?
--
Aaron Turner
http://synfin.net/ Twitter: @synfinatic
http://tcpreplay.synfin.net/ - Pcap editing and replay tools for Unix
Windows
Those who would give up essential Liberty, to purchase a little temporary
Safety, deserve neither Liberty nor Safety.
-- Benjamin Franklin
carpe diem
From: Aaron Turner synfina...@gmail.commailto:synfina...@gmail.com
Reply-To: user@cassandra.apache.orgmailto:user@cassandra.apache.org
user@cassandra.apache.orgmailto:user@cassandra.apache.org
Date: Sunday, May 5, 2013 5:27 PM
To: cassandra users user@cassandra.apache.orgmailto:
user
From: Aaron Turner synfina...@gmail.commailto:synfina...@gmail.com
Reply-To: user@cassandra.apache.orgmailto:user@cassandra.apache.org
user@cassandra.apache.orgmailto:user@cassandra.apache.org
Date: Monday, May 6, 2013 10:57 AM
To: cassandra users user@cassandra.apache.orgmailto:
user
Have you tried running your code in GDB to find which line is causing the
error? That would be what I'd do first.
Aaron Turner
http://synfin.net/ Twitter: @synfinatic
https://github.com/synfinatic/tcpreplay - Pcap editing and replay tools for
Unix Windows
Those who would give up
Physical machines unless you're running your cluster in the cloud (AWS/etc).
Reason is simple: Look how Cassandra scales and provides redundancy.
Aaron Turner
http://synfin.net/ Twitter: @synfinatic
https://github.com/synfinatic/tcpreplay - Pcap editing and replay tools for
Unix Windows
On Wed, Sep 11, 2013 at 4:40 PM, Shahab Yunus shahab.yu...@gmail.comwrote:
Thanks Aaron for the reply. Yes, VMs or the nodes will be in cloud if we
don't go the physical route.
Look how Cassandra scales and provides redundancy.
But how does it differ for physical machines or VMs (in
on physical hardware and Cassandra like all databases likes lots of RAM
(although this can be offset some with SSD's) which tends to be expensive
in the cloud.
--
Aaron Turner
http://synfin.net/ Twitter: @synfinatic
https://github.com/synfinatic/tcpreplay - Pcap editing and replay
.
--
Aaron Turner
http://synfin.net/ Twitter: @synfinatic
https://github.com/synfinatic/tcpreplay - Pcap editing and replay
tools for Unix Windows
Those who would give up essential Liberty, to purchase a little temporary
Safety, deserve neither Liberty nor Safety.
-- Benjamin Franklin
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