Unfortunately ssd drives are no option at the moment. I have to use 2
regular hds. Has anyone tried above scenario?
THanks,
Thibaut
On Fri, Aug 10, 2012 at 3:30 PM, Radim Kolar h...@filez.com wrote:
I was thinking about putting both the commit log and the data directory
on a software raid
Hi,
Has anyone of you made some experience with software raid (raid 1,
mirroring 2 disks)?
Our workload is rather read based at the moment (Commit Log directory only
grows by 128MB every 2-3 minutes), while the second hd is under high load
due to the read requests to our cassandra cluster.
I
Hi,
I just diagnosted this strange behavior:
When I fetch a rangeslice through hector and set the consistency level to
quorum, according to cfstats (and also to the output files on the hd),
cassandra seems to execute a write request for each read I execute. The
write count in cfstats is
Also executing the same multiget rangeslice query over the same range again
will trigger the same writes again and again.
On Wed, Apr 11, 2012 at 5:41 PM, Thibaut Britz
thibaut.br...@trendiction.com wrote:
Hi,
I just diagnosted this strange behavior:
When I fetch a rangeslice through
PM, R. Verlangen ro...@us2.nl wrote:
Are you sure this isn't read-repair?
http://wiki.apache.org/cassandra/ReadRepair
2012/4/11 Thibaut Britz thibaut.br...@trendiction.com
Also executing the same multiget rangeslice query over the same range
again will trigger the same writes again and again
Fixed in https://issues.apache.org/jira/browse/CASSANDRA-3843
On Wed, Apr 11, 2012 at 5:58 PM, Thibaut Britz
thibaut.br...@trendiction.com wrote:
We have read repair disabled (0.0).
Even if this would be the case, this also doesn't explain why the writes
are executed again and again when
(as I outlined in my parallel post) but if it fixes it for you, then
beautiful. Just wanted to let you know our experience with similar
symptoms.
On Apr 11, 2012, at 11:56 AM, Thibaut Britz wrote:
Fixed in https://issues.apache.org/jira/browse/CASSANDRA-3843
On Wed, Apr 11, 2012
for what
was fixed.
2012/3/2 Marcus Eriksson krum...@gmail.com
beware of https://issues.apache.org/jira/browse/CASSANDRA-3820 though if
you have many keys per node
other than that, yep, it seems solid
/Marcus
On Wed, Feb 29, 2012 at 6:20 PM, Thibaut Britz
thibaut.br...@trendiction.com
Any more feedback on larger deployments of 1.0.*?
We are eager to try out the new features in production, but don't want to
run into bugs as on former 0.7 and 0.8 versions.
Thanks,
Thibaut
On Tue, Jan 31, 2012 at 6:59 AM, Ben Coverston
ben.covers...@datastax.comwrote:
I'm not sure what
Thanks Sylvain!
That's exactly what I needed to know.
On Mon, Jan 2, 2012 at 12:49 PM, Sylvain Lebresne sylv...@datastax.comwrote:
On Mon, Jan 2, 2012 at 11:51 AM, Thibaut Britz
thibaut.br...@trendiction.com wrote:
Hi,
due to a misconfiguration on our site, some parts of our data got
Hi,
due to a misconfiguration on our site, some parts of our data got saved
with a wrong expiration date, which expired just recently.
How can I recover the data?
Is it sufficient to copy over a backup of the tables into the table
directory and iterate over the table (e.g. Read.ALL). Does
Hi,
We use these type of crashes as indicator that the node might have some
hardware errors.
Did you check the ram? (eg memtest86)
Thibaut
On Wed, Nov 2, 2011 at 2:03 PM, Jahangir Mohammed
md.jahangi...@gmail.comwrote:
Hello All,
JVM is crashing on the cassandra nodes. Re-start doesn't
Great news!
Especially the improved read performance and compactions are great!
Thanks,
Thibaut
On Tue, Oct 18, 2011 at 2:11 PM, Jonathan Ellis jbel...@gmail.com wrote:
Thanks for the help, everyone! This is a great milestone for Cassandra.
On Tue, Oct 18, 2011 at 7:01 AM, Sylvain Lebresne
-
Aaron Morton
Freelance Cassandra Developer
@aaronmorton
http://www.thelastpickle.com
On 22/08/2011, at 3:33 AM, Thibaut Britz wrote:
Hi,
I will wait until this is fixed beforeI upgrade, just to be sure.
Shall I open a new ticket for this issue?
Thanks,
Thibaut
On Sun, Aug 21, 2011
.
-
Aaron Morton
Freelance Cassandra Developer
@aaronmorton
http://www.thelastpickle.com
On 19/08/2011, at 9:42 PM, Thibaut Britz wrote:
Hi,
we were using apache-cassandra-2011-06-28_08-04-46.jar so far in
production and wanted to upgrade to 0.8.4.
Our cluster was well balanced and we
Hi,
we were using apache-cassandra-2011-06-28_08-04-46.jar so far in
production and wanted to upgrade to 0.8.4.
Our cluster was well balanced and we only saved keys with a lower case
md5 prefix. (Orderpreserving partitioner).
Each node owned 20% of the tokens, which was also displayed on each
Reading this, I tried it again (this time on a freshly formated node due to
hd failure).
Before crashing, my data dir was only 7.7M big. Using nmap_indexonly
(mlockall was successfull) on a 64bit machine.
Anything else I could try to get this to work? Ps. All the other nodes (and
this node) run
Could this be related as well to
https://issues.apache.org/jira/browse/CASSANDRA-2463?
Thibaut
On Wed, Apr 27, 2011 at 11:35 PM, Aaron Morton aa...@thelastpickle.comwrote:
I'm a bit confused by the two different cases you described, so cannot
comment specially on your case.
In general if
Just accidently hard resetet a node running 0.7.2 (with some patches from
0.7.3) and had the same problem.
I'm a little hesitating upgrading to 0.7.4
Can I always delete the Statistics.db without any data loss?
Thibaut
On Thu, Mar 24, 2011 at 1:37 AM, Brandon Williams dri...@gmail.com wrote:
If it helps you to sleep better,
we use cassandra (0.7.2 with the flush fix) in production on 100 servers.
Thibaut
On Thu, Mar 17, 2011 at 5:58 PM, Paul Pak p...@yellowseo.com wrote:
I'm at a crossroads right now. We built an application around .7 and
the features in .7, so going back to
As for the version,
we will wait a few more days, and if nothing really bad shows up, move to
0.7.4.
On Thu, Mar 17, 2011 at 10:40 PM, Thibaut Britz
thibaut.br...@trendiction.com wrote:
Hi Paul,
It's more of a scientific mining app. We crawl websites and extract
information from
, Mar 17, 2011 at 6:53 PM, Paul Pak p...@yellowseo.com wrote:
On 3/17/2011 1:06 PM, Thibaut Britz wrote:
If it helps you to sleep better,
we use cassandra (0.7.2 with the flush fix) in production on 100
servers.
Thibaut
Thanks Thibaut, believe it or not, it does. :)
Is your use
Hi,
How would you use rsync instead of repair in case of a node failure?
Rsync all files from the data directories from the adjacant nodes
(which are part of the quorum group) and then run a compactation which
will? remove all the unneeded keys?
Thanks,
Thibaut
On Thu, Feb 24, 2011 at 4:22
Your write will fail. But if the write has reached at least one node,
it will eventually reach all the other nodes as well. So it won't
rollback.
On Tue, Feb 15, 2011 at 7:38 PM, A J s5a...@gmail.com wrote:
Say I set write consistency level to ALL and all but one node are down. What
happens
Cassandra is very CPU hungry so you might be hitting a CPU bottleneck.
What's your CPU usage during these tests?
On Tue, Feb 15, 2011 at 8:45 PM, Markus Klems mar...@klems.eu wrote:
Hi there,
we are currently benchmarking a Cassandra 0.6.5 cluster with 3
High-Mem Quadruple Extra Large EC2
I think this is related to a faulty disk.
On Mon, Feb 7, 2011 at 3:35 PM, Patrik Modesto patrik.mode...@gmail.com wrote:
INFO 15:30:49,647 Compacted to
/www/foo/cassandra/data/foo/Url-tmp-f-767-Data.db. 4,199,999,762 to
4,162,579,242 (~99% of original) bytes for 379,179 keys. Time:
https://issues.apache.org/jira/browse/CASSANDRA-1676
you have to use at least 0.6.7
On Wed, Jan 5, 2011 at 4:19 PM, Edward Capriolo edlinuxg...@gmail.comwrote:
On Wed, Jan 5, 2011 at 10:05 AM, Ran Tavory ran...@gmail.com wrote:
In storage-conf I see this comment [1] from which I understand
dropping messages off the client
request path (CASSANDRA-1676) related to the bootstrap questions I had?
On Wed, Jan 5, 2011 at 5:23 PM, Thibaut Britz
thibaut.br...@trendiction.com wrote:
https://issues.apache.org/jira/browse/CASSANDRA-1676
you have to use at least 0.6.7
On Wed, Jan 5
Hi,
The UnavailableExceptions will be thrown because quorum of size 2
needs at least 2 nodes to be alive (as for qurom of size 3 as well).
The data won't be automatically redistributed to other nodes.
Thibaut
On Thu, Dec 9, 2010 at 4:40 PM, Timo Nentwig timo.nent...@toptarif.de wrote:
Hi!
, Thibaut Britz
thibaut.br...@trendiction.com wrote:
Assuming I'm reading and writing with consitency level 1 (one), read
repair
turned off, I have a few questions about data propagation.
Data is being stored at consistency level 3.
1) If all nodes are up:
- Will all writes eventually reach
Maybe yourStoragePort7000/StoragePort is being blocked by iptables
or some firewall or maybe you have it bound (ListenAddress tag ) to
localhost instead an ip address.
Hope this helps,
Dimitry.
On Thu, Oct 28, 2010 at 5:35 PM, Thibaut Britz
thibaut.br...@trendiction.com wrote:
Hi
On Wed, Oct 27, 2010 at 1:46 PM, Thibaut Britz
thibaut.br...@trendiction.com wrote:
Depending on the range I choose, choosing manually a token will also fail.
(node will never exit boostrap, streams doesn't list any open streams)
INFO [Thread-53] 2010-10-27 20:33:37,399 SSTableReader.java
Hi,
I have the same problem with 0.6.5
New nodes will hang forever in bootstrap mode (no streams are being opened)
and the receiver thread just waits for data forever:
INFO [Thread-53] 2010-10-27 20:33:37,399 SSTableReader.java (line 120)
Sampling index for /hd2/cassandra/data/table_xyz/
$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)
On Wed, Oct 27, 2010 at 8:27 PM, Thibaut Britz
thibaut.br...@trendiction.com wrote:
Hello Tyler,
thanksf or the quick answer. That's true, I should have noticed.
I also tried kicking out one node
PM, Thibaut Britz tbr...@gmail.com wrote:
Hi,
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