On Thu, Jan 31, 2013 at 3:31 PM, Wei Zhu wrote:
> The only reason I can think of is that the new node has the same IP as the
> "dead" node we tried to replace? After reading the bootstrap code, it
> shouldn't be the case. Is it a bug? Or anyone tried to replace a dead node
> with the same IP?
You
On Thu, Jan 31, 2013 at 12:17 PM, Edward Capriolo wrote:
> Now by default a new partitioner is chosen Murmer3.
"Now" = as of 1.2, to be unambiguous.
=Rob
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On Thu, Jan 31, 2013 at 12:19 PM, Wei Zhu wrote:
> But I am still not sure how about the my first question regarding the
> bootstrap, anyone?
As I understand it, bootstrap occurs from a single replica. Which
replica is chosen is based on some internal estimation of which is
closest/least loaded/e
On Wed, Jan 30, 2013 at 7:21 AM, Edward Capriolo wrote:
> My suggestion: At minimum we should re-route these questions to client-dev
> or simply say, "If it is not part of core Cassandra, you are looking in the
> wrong place for support"
+1, I find myself scanning past all those questions in orde
On Tue, Jan 22, 2013 at 2:57 PM, Sergey Olefir wrote:
> Do you have a suggestion as to what could be a better fit for counters?
> Something that can also replicate across DCs and survive link breakdown
> between nodes (across DCs)? (and no, I don't need 100.00% precision
> (although it would be ni
On Tue, Jan 22, 2013 at 5:03 AM, Sergey Olefir wrote:
> I am load-testing counter increments at the rate of about 10k per second.
Do you need highly performant counters that count accurately, without
meaningful chance of over-count? If so, Cassandra's counters are
probably not ideal.
> We wanted
On Wed, Jan 16, 2013 at 1:30 PM, Nicolas Lalevée
wrote:
> Here is the long story.
> After some long useless staring at the monitoring graphs, I gave a try to
> using the openjdk 6b24 rather than openjdk 7u9
OpenJDK 6 and 7 are both counter-recommended with regards to
Cassandra. I've heard reports
On Fri, Jan 11, 2013 at 10:32 AM, Brian Tarbox wrote:
> I'd like to be able to find out which processes are connected to my
> clusteris there a way to do this?
No, not internally to Cassandra, short of enabling DEBUG logging for
associated classes. Use netstat or similar.
If you are interest
On Tue, Jan 8, 2013 at 11:56 AM, Todd Nine wrote:
> Our current production
> cluster is still on 1.0.x, so we can either fire up a 1.0.x cluster, then
> upgrade every node to accomplish this, or just use the script.
No 1.0 cluster is required to restore 1.0 directory structure to a 1.1
cluster an
On Tue, Jan 8, 2013 at 8:41 AM, Todd Nine wrote:
> I have recently been trying to restore backups from a v1.0.x cluster we
> have into a 1.1.7 cluster. This has not been as trivial as I expected, and
> I've had a lot of help from the IRC channel in tackling this problem. As a
> way of saying t
On Mon, Jan 7, 2013 at 9:05 AM, DE VITO Dominique
wrote:
> Is "nodetool repair" only usable if the node to repair has a valid (=
> up-to-date with its neighbors) schema?
If the node is in the cluster, it should have the correct schema. If
it doesn't have the correct schema, you should either wai
On Wed, Jan 2, 2013 at 4:33 AM, Everton Lima wrote:
> I would to know if it is possible to create 2 clusters, in the first
> constain just meta-data and in the second just the real data. How the system
> will comunicate with this both cluster and one cluster communicate with
> other? Could any one
For those playing along at home, I have filed
https://issues.apache.org/jira/browse/CASSANDRA-5084 ("Cassandra
should expose connected client state via JMX") as a result of this
thread.
=Rob
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Before we start.. what version of cassandra?
On Fri, Dec 21, 2012 at 4:25 PM, Keith Wright wrote:
> This behavior seems to occur if I do a large
> amount of data loading using that node as the coordinator node.
In general you want to use all nodes to coordinate, not a single one.
> Nodetool net
On Thu, Dec 20, 2012 at 12:41 PM, Rob Coli wrote:
> So, by default Cassandra does in fact use one thread per thrift connection.
Also of note is that even with hsha, an *active* connection (where
synchronous storage backend is doing something) consumes a thread.
Some more background at :
ht
On Wed, Dec 19, 2012 at 4:20 PM, Hiller, Dean wrote:
> What? I thought cassandra was using nio so thread per connection is not
> true?
Here's the monkey test I used to verify my conjecture.
1) ps -eLf |grep jsvc |grep cassandra | wc -l # note number of threads
2) for name in {1..300}; do c
On Thu, Dec 20, 2012 at 10:18 AM, DE VITO Dominique
wrote:
> With RF=3 and NetworkTopologyStrategy, "The first replica per data center is
> placed according to the partitioner (same as with SimpleStrategy). Additional
> replicas in the same data center are then determined by walking the ring
>
On Tue, Dec 18, 2012 at 1:37 AM, Tomas Nunez wrote:
> Can you think a better way than "netstat" to get this information? Better
> yet, is there anything similar to "Show processlist" in mysql?
An easy/not very accurate proxy for this is the thread count within the
jvm. An open connection has a t
On Thu, Dec 13, 2012 at 11:43 AM, Drew Kutcharian wrote:
> With Java 6 begin EOL-ed soon
> (https://blogs.oracle.com/java/entry/end_of_public_updates_for), what's the
> status of Cassandra's Java 7 support? Anyone using it in production? Any
> outstanding *known* issues?
I'd love to see an off
On Thu, Dec 6, 2012 at 7:36 PM, aaron morton wrote:
> So for memory mapped files, compaction can do a madvise SEQUENTIAL instead
> of current DONTNEED flag after detecting appropriate OS versions. Will this
> help?
>
>
> AFAIK Compaction does use memory mapped file access.
The history :
https://
On Thu, Dec 6, 2012 at 5:26 PM, Shahryar Sedghi wrote:
> I am on 1.1.4 now (I can go to 1.1.6 if needed) and apparently it is
> broken. I defined the table like this:
In general people on 1.1.x below 1.1.6 should upgrade to at least
1.1.6 ASAP, because all versions of 1.1.x before 1.1.6 have bro
On Wed, Dec 5, 2012 at 3:59 PM, Shahryar Sedghi wrote:
> Is there a keyword with the same functionality as reversed=True or CQL 3 on
> Cassandra 1.1.6?
https://issues.apache.org/jira/browse/CASSANDRA-4004
=Rob
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On Wed, Dec 5, 2012 at 9:06 AM, Roman Yankin wrote:
> In Cassandra v 0.7 there was a column family property called keys_cached, now
> it's gone and I'm struggling to understand which of the below properties it's
> now substituted (if substituted at all)?
Key and row caches are global in modern
On Sat, Dec 1, 2012 at 9:29 AM, Radim Kolar wrote:
> from time to time people ask here for splitting large sstables, here is
> patch doing that
>
> https://issues.apache.org/jira/browse/CASSANDRA-4897
Interesting, thanks for the contribution! :D
For those who might find this thread via other mea
On Thu, Nov 29, 2012 at 11:56 AM, Wei Zhu wrote:
> I am trying to rename a cluster by following the instruction on Wiki:
> [...]
> I have to remove the data directory in order to change the cluster name.
> Luckily it's my testing box, so no harm. Just wondering what has been
> changed not to allow
On Wed, Nov 28, 2012 at 7:15 AM, Edward Capriolo wrote:
> I may be wrong but during a bootstrap hints can be silently discarded, if
> the node they are destined for leaves the ring.
Yeah : https://issues.apache.org/jira/browse/CASSANDRA-2434
> A user like this might benefit from DANGER counters.
On Tue, Nov 27, 2012 at 3:21 PM, Edward Capriolo wrote:
> I mispoke really. It is not dangerous you just have to understand what it
> means. this jira discusses it.
>
> https://issues.apache.org/jira/browse/CASSANDRA-3868
Per Sylvain on the referenced ticket :
"
I don't disagree about the effici
On Fri, Nov 23, 2012 at 3:33 AM, Thomas Stets wrote:
> Is there any advantage in using a different placement strategy, consigering
> that each node has all of the data anyway?
No. In your case there is no advantage to NetworkTopologyStrategy. It
is somewhat odd that you have one logical cluster i
On Fri, Nov 23, 2012 at 11:33 AM, Darvin Denmian
wrote:
> But right now I need to increased the level of data redundancy ... and
> to accomplish that I'll configure 3
> new Cassandra nodes in other Data Center.
https://issues.apache.org/jira/browse/CASSANDRA-3483
=Rob
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=Robert Coli
AIM>ALK
On Tue, Nov 20, 2012 at 11:40 PM, Timmy Turner wrote:
> I thought you were going to expose the internals of CQL3 features like (wide
> rows with) complex keys and collections to CQL2 clients (which is something
> that should generally be possible, if Datastax' blog posts are accurate,
> i.e. an ac
On Tue, Nov 20, 2012 at 2:03 AM, Alain RODRIGUEZ wrote:
]> Thanks for the work around, setting disk_access_mode: standard worked.
Do you have working JNA, for reference?
=Rob
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=Robert Coli
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On Mon, Nov 19, 2012 at 7:18 PM, Mike Heffner wrote:
> We performed a 1.1.3 -> 1.1.6 upgrade and found that all the logs replayed
> regardless of the drain.
Your experience and desire for different (expected) behavior is welcomed on :
https://issues.apache.org/jira/browse/CASSANDRA-4446
"nodeto
On Mon, Nov 19, 2012 at 6:17 AM, Andras Szerdahelyi <
andras.szerdahe...@ignitionone.com> wrote:
> How is the "saved row cache file" processed? Are the cached row keys
> simply iterated over and their respective rows read from SSTables -
> possibly creating random reads with small enough sstable f
On Sun, Nov 18, 2012 at 7:57 PM, Ananth Gundabattula
wrote:
> As per the above url, " After running a major compaction, automatic minor
> compactions are no longer triggered, frequently requiring you to manually
> run major compactions on a routine basis." ( Just before the heading Tuning
> Column
On Thu, Nov 15, 2012 at 6:21 AM, Alain RODRIGUEZ wrote:
> We had an issue with counters over-counting even using the nodetool drain
> command before upgrading...
You're sure the over-count was caused by the upgrade?Counts can be
counted on (heh) to overcount. What is the scale of the over-count?
On Thu, Nov 15, 2012 at 4:12 PM, Dwight Smith
wrote:
> I have a 4 node cluster, version 1.1.2, replication factor of 4, read/write
> consistency of 3, level compaction. Several questions.
Hinted Handoff is broken in your version [1] (and all versions between
1.0.0 and 1.0.3 [2]). Upgrade to 1.1.
On Mon, Nov 12, 2012 at 3:35 PM, cem wrote:
> We are currently facing a performance issue with counter column families. I
> see lots of pending ReplicateOnWriteStage tasks in tpstats. Then I disabled
> replicate_on_write. It helped a lot. I want to use like that but I am not
> sure how to use it.
On Sat, Nov 10, 2012 at 6:16 PM, Drew Kutcharian wrote:
> Thanks Rob, this makes sense. We only have one rack at this point, so I think
> it'd be better to start with PropertyFileSnitch to make Cassandra think that
> these nodes each are in a different rack without having to put them on
> diffe
On Sat, Nov 10, 2012 at 3:00 PM, Tyler Hobbs wrote:
> For an alternative that doesn't require the same ring topology, you can use
> the bulkloader, which will take care of distributing the data to the correct
> nodes automatically.
For more details on which cases are best for the different bulk
l
On Thu, Nov 8, 2012 at 4:57 PM, Jeremy McKay
wrote:
>
http://wiki.apache.org/cassandra/FAQ#unsubscribe
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On Thu, Nov 8, 2012 at 5:15 PM, Yang wrote:
> some of my colleagues seem to use this method to backup/restore a cluster,
> successfully:
>
>> on each of the node, save entire /cassandra/data/ dir to S3,
> then on a new set of nodes, with exactly the same number of nodes, copy
> back each of the d
On Thu, Nov 8, 2012 at 10:12 AM, B. Todd Burruss wrote:
> my question is would leveled compaction help to get rid of the tombstoned
> data faster than size tiered, and therefore reduce the disk space usage?
You could also...
1) run a major compaction
2) code up sstablesplit
3) profit!
This meth
On Mon, Nov 5, 2012 at 12:23 PM, Drew Kutcharian wrote:
>> Switching from SimpleStrategy to RackAware can be a pain.
>
> Can you elaborate a bit? What would be the pain point?
If you don't maintain the same replica placement vis a vis nodes on
your cluster, you have to dump and reload.
Simple ex
On Fri, Nov 2, 2012 at 2:46 AM, horschi wrote:
> might I ask why repair cannot simply ignore anything that is older than
> gc-grace? (like Aaron proposed) I agree that repair should not process any
> tombstones or anything. But in my mind it sounds reasonable to make repair
> ignore timed-out dat
On Thu, Nov 1, 2012 at 1:43 AM, Sylvain Lebresne wrote:
> on all your columns), you may want to force a compaction (using the
> JMX call forceUserDefinedCompaction()) of that sstable. The goal being
> to get read of a maximum of outdated tombstones before running the
> repair (you could also alter
On Tue, Oct 30, 2012 at 4:18 AM, 張 睿 wrote:
> Does anyone here know if there is an efficient way to migrate multiple
> cassandra clusters' data
> to a single cassandra cluster without any dataloss.
Yes.
1) create schema which is superset of all columnfamilies and all keyspaces
2) if all source c
On Mon, May 21, 2012 at 7:08 AM, Alain RODRIGUEZ wrote:
> Here are my 2 nodes starting logs, I hop it can help...
>
> https://gist.github.com/2762493
> https://gist.github.com/2762495
I see in these logs that you replay 2 mutations per node, despite
doing nodetool drain before restarting. However
On Mon, Oct 22, 2012 at 8:38 AM, Bryan Talbot wrote:
> The nodes with the most data used the most memory. All nodes are affected
> eventually not just one. The GC was on-going even when the nodes were not
> compacting or running a heavy application load -- even when the main app was
> paused con
On Tue, Oct 16, 2012 at 4:45 PM, Edward Sargisson
wrote:
> The Datastax documentation says that Java 7 is not recommended[1]. However,
> Java 6 is due to EOL in Feb 2013 so what is the reasoning behind that
> comment?
I've asked this approximate question here a few times, with no
official respons
On Fri, Oct 12, 2012 at 1:26 AM, Daniel Woo wrote:
>>>What version of Cassandra? What JVM? Are JNA and Jamm working?
> cassandra 1.0.8. Sun JDK 1.7.0_05-b06, JNA memlock enabled, jamm works.
The unusual aspect here is Sun JDK 1.7. Can you use 1.6 on an affected
node and see if the problem disappe
https://issues.apache.org/jira/browse/CASSANDRA-3483
Is directly on point for the use case in question, and introduces
"rebuild" concept..
https://issues.apache.org/jira/browse/CASSANDRA-3487
https://issues.apache.org/jira/browse/CASSANDRA-3112
Are for improvements in repair sessions..
https://
On Thu, Oct 11, 2012 at 11:02 AM, Rob Coli wrote:
> On Wed, Oct 10, 2012 at 11:04 PM, Daniel Woo wrote:
> We did not see any swap usage during the GC, any idea about this?
As an aside.. you shouldn't have swap enabled on a Cassandra node,
generally. As a simple example, if yo
On Wed, Oct 10, 2012 at 11:04 PM, Daniel Woo wrote:
> I am running a mini cluster with 6 nodes, recently we see very frequent
> ParNewGC on two nodes. It takes 200 - 800 ms on average, sometimes it takes
> 5 seconds. You know, hte ParNewGC is stop-of-wolrd GC and our client throws
> SocketTimeoutE
On Thu, Oct 11, 2012 at 8:41 AM, Alexey Zotov wrote:
> Value of DeletedColumn is a serialized local
> deletion time. We know that local deletion time can be different on
> different nodes for the same tombstone. So hashes of the same tombstone on
> different nodes will be different. Is it true?
Y
On Tue, Oct 9, 2012 at 12:56 PM, Oleg Dulin wrote:
> My understanding is that the repair has to happen within gc_grace period.
> [ snip ]
> So the question is, is this still needed ? Do we even need to run nodetool
> repair ?
If Hinted Handoff works in your version of Cassandra, and that version
On Thu, Sep 27, 2012 at 2:46 AM, Віталій Тимчишин wrote:
> I suppose the way is to convert all SST to json, then install previous
> version, convert back and load
Only files flushed in the new version will need to be dumped/reloaded.
Files which have not been scrubbed/upgraded (ie, have the 1.0
On Thu, Sep 27, 2012 at 3:25 PM, Arya Goudarzi wrote:
> rcoli helped me investigate this issue. The mystery was that the segment of
> commit log was probably not fsynced to disk since the setting was set to
> periodic with 10 second delay and CRC32 checksum validation failed skipping
> the reply,
On Wed, Sep 26, 2012 at 9:30 AM, Andrey Ilinykh wrote:
> [ repair ballooned my data size ]
> 1. Why repair almost triples data size?
You didn't mention what version of cassandra you're running. In some
old versions of cassandra (prior to 1.0), repair often creates even
more extraneous data than i
On Wed, Sep 26, 2012 at 6:05 AM, Sylvain Lebresne wrote:
> On Wed, Sep 26, 2012 at 2:35 AM, Rob Coli wrote:
>> 150,000 sstables seem highly unlikely to be performant. As a simple
>> example of why, on the read path the bloom filter for every sstable
>> must be consulted
On Sun, Sep 23, 2012 at 12:24 PM, Aaron Turner wrote:
>> Leveled compaction've tamed space for us. Note that you should set
>> sstable_size_in_mb to reasonably high value (it is 512 for us with ~700GB
>> per node) to prevent creating a lot of small files.
>
> 512MB per sstable? Wow, that's freaki
On Wed, Jul 18, 2012 at 10:27 AM, Douglas Muth wrote:
> Even though keyspace "test1" had a replication_factor of 1 to start
> with, each of the above UPDATE KEYSPACE commands caused a new UUID to
> be generated for the schema, which I assume is normal and expected.
I believe the actual issue you
On Fri, Sep 14, 2012 at 7:05 AM, Xu, Zaili wrote:
> I am pretty new to Cassandra. I have a script that needs to set up a schema
> first before starting up the cassandra node. Is this possible ? Can I create
> the schema directly on cassandra storage and then when the node starts up it
> will pick
On Fri, Sep 21, 2012 at 4:31 AM, Ben Hood <0x6e6...@gmail.com> wrote:
> So if I understand you correctly, one shouldn't code against what is
> essentially an internal artefact that could be subject to change as
> the Cassandra code base evolves and furthermore may not contain the
> information an a
On Sun, Sep 9, 2012 at 12:01 PM, Robin Verlangen wrote:
> Deleting the commitlog files is harmless. It's just a tool that tries to
> keep Cassandra more in-sync with the other nodes. A standard repair will fix
> all problems that a commitlog replay might do too.
This is not really true.. imagine
On Tue, Sep 11, 2012 at 4:21 PM, Edward Sargisson
wrote:
> If the downed node is a seed node then neither of the replace a dead node
> procedures work (-Dcassandra.replace_token and taking initial_token-1). The
> ring remains split.
> [...]
> In other words, if the host name is on the seeds list t
On Fri, Sep 7, 2012 at 6:38 AM, Rene Kochen wrote:
> If I use node-tool drain, it does stop accepting writes and flushes the
> tables. However, is it normal that the commit log files are not deleted and
> that it gets replayed?
It's not expected by design, but it does seem to be normal in
cassand
On Sun, Jul 29, 2012 at 7:40 PM, Dustin Wenz wrote:
> We've just set up a new 7-node cluster with Cassandra 1.1.2 running under
> OpenJDK6.
It's worth noting that Cassandra project recommends Sun JRE. Without
the Sun JRE, you might not be able to use JAMM to determine the live
ratio. Very few pe
http://wiki.apache.org/cassandra/FAQ#unsubscribe
On Wed, Aug 29, 2012 at 3:57 PM, Juan Antonio Gomez Moriano <
mori...@exciteholidays.com> wrote:
>
> --
> *Juan Antonio Gomez Moriano*
> DEVELOPER TEAM LEADER [image: Excite Holidays]
>
> T +61 2 8061 2917
>
> emori...@exciteholidays.com
>
> Www
On Thu, Aug 30, 2012 at 10:39 PM, Casey Deccio wrote:
>> In what way are the lookups "failing"? Is there an exception?
>>
> No exception--just failing in that the data should be there, but isn't.
At ConsistencyLevel.ONE or QUORUM?
If you are bootstrapping the node, I would expect there to be no
On Thu, Aug 30, 2012 at 10:18 AM, Casey Deccio wrote:
> I'm adding a new node to an existing cluster that uses
> ByteOrderedPartitioner. The documentation says that if I don't configure a
> token, then one will be automatically generated to take load from an
> existing node.
> What I'm finding is
On Mon, Aug 27, 2012 at 9:25 AM, Senthilvel Rangaswamy
wrote:
> We are running 1.1.2 on m1.xlarge with ephemeral store for data. We are
> seeing very high loads on one of the nodes in the ring, 30+.
My first hunch would be that you are sending all client requests to
this one node, so it is coordi
On Fri, Aug 24, 2012 at 4:33 AM, Amit Handa wrote:
> kindly help in resolving the following problem with respect to super column
> family.
> i am using cassandra version 1.1.3
Well, THERE's your problem... ;D
But seriously.. as I understand project intent, super columns will
ultimately be a weir
On Thu, Aug 23, 2012 at 11:47 AM, Edward Sargisson
wrote:
> I was wondering if anybody had seen the following behaviour before and how
> we might detect it and keep the application running.
I don't know the answer to your problem, but anyone who does will want
to know in what version of Cassandra
On Wed, Aug 22, 2012 at 2:12 AM, Christoph Hack wrote:
> 4. Prepared Statements
FWIW, while I suppose a client author is technically a "user" of
Cassandra, you appear to be making suggestions related to the
development of Cassandra. As I understand the conceptual seperation
between lists, you pro
On Sun, Aug 19, 2012 at 11:09 AM, Peter Morris wrote:
> Is the Windows community edition crippled for network use perhaps, or could
> the problem be something else?
It's not "crippled" but it underperforms Cassandra on Linux. Cassandra
contains various Linux specific optimizations which result in
On Wed, Aug 22, 2012 at 8:37 AM, Senthilvel Rangaswamy
wrote:
> We are running Cassandra 1.1.2 on EC2. Our database is primarily all
> counters and we don't do any
> deletes.
>
> Does nodetool repair do anything for such a database. All the docs I read
> for nodetool repair suggests
> that nodetoo
On Wed, Aug 8, 2012 at 10:28 PM, rajesh.ba...@orkash.com
wrote:
> i would suggest you delete the files in your system keyspace folder except
> files like Schema*.*.
This thread could have been much shorter with a judicious use of "grep", heh ...
# grep -i name /etc/cassandra/cassandra.yaml
clust
On Fri, Jul 13, 2012 at 5:18 PM, Dave Brosius wrote:
> It depends on what partitioner you use. You should be using the
> RandomPartitioner, and if so, the rows are sorted by the hash of the row
> key. there are partitioners that sort based on the raw key value but these
> partitioners shouldn't be
On Mon, Jul 2, 2012 at 5:43 AM, puneet loya wrote:
> When I restarted the system , it is showing the keyspace does not exist.
>
> Not even letting me to create the keyspace with the same name again.
Paste the error you get.
=Rob
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On Mon, Jun 18, 2012 at 12:07 AM, Jason Tang wrote:
> After I enable key cache and row cache, the problem gone, I guess it because
> we have lots of data in SSTable, and it takes more time, memory and cpu to
> search the data.
The Key Cache is usually a win if added like this. The Row cache is
le
On Tue, Jun 19, 2012 at 8:55 PM, Rob Coli wrote:
> On Tue, Jun 19, 2012 at 2:55 AM, Alain RODRIGUEZ wrote:
>> Unable to create hard link from
>> /raid0/cassandra/data/cassa_teads/stats_product-hc-233-Data.db to
>> /raid0/cassandra/data/cassa_teads/snapshots/1340099026781
On Tue, Jun 19, 2012 at 2:55 AM, Alain RODRIGUEZ wrote:
> Unable to create hard link from
> /raid0/cassandra/data/cassa_teads/stats_product-hc-233-Data.db to
> /raid0/cassandra/data/cassa_teads/snapshots/1340099026781/stats_product-hc-233-Data.db
Are you able to create this hard link via the file
On Thu, May 31, 2012 at 7:01 PM, aaron morton wrote:
> But that talks about segments not being cleared at startup. Does not explain
> why they were allowed to get past the limit in the first place.
Perhaps the commit log size tracking for this limit does not, for some
reason, track hints? This se
On Tue, May 29, 2012 at 10:29 PM, Pierre Chalamet wrote:
> You'd better use version 1.0.9 (using this one in production) or 1.0.10.
>
> 1.1 is still a bit young to be ready for prod unfortunately.
OP described himself as "experimenting" which I inferred to mean
not-production. I agree with others
On Wed, May 30, 2012 at 4:08 AM, Vanger wrote:
> 3) Java 7 now recommended for use by Oracle. We have several developers
> running local cassandra instances on it for a while without problems.
> Anybody tried it in production? Some time ago java 7 wasn't recommended for
> use with cassandra, what'
On Mon, May 28, 2012 at 6:53 AM, osishkin osishkin wrote:
> I'm experimenting with Cassandra 0.7 for some time now.
I feel obligated to recommend that you upgrade to Cassandra 1.1.
Cassandra 0.7 is better than 0.6, but I definitely still wouldn't be
"experimenting" with this old version in 2012.
On Sat, May 19, 2012 at 8:14 AM, Raj N wrote:
> Hi experts,
> [ repair seems to be hanging forever ]
https://issues.apache.org/jira/browse/CASSANDRA-2433
Affects 0.8.4.
I also believe there is a contemporaneous bug (reported by Stu Hood?)
regarding failed repair resulting in extra disk usage, b
On Thu, May 24, 2012 at 12:44 PM, Steve Neely wrote:
> It also seems like a dark deployment of your new cluster is a great method
> for testing the Linux-based systems before switching your mision critical
> traffic over. Monitor them for a while with real traffic and you can have
> confidence tha
On Tue, May 22, 2012 at 4:56 AM, samal wrote:
> Not ideally, now cass has global memtable tuning. Each cf correspond to
> memory in ram. Year wise cf means it will be in read only state for next
> year, memtable will still consume ram.
An empty memtable seems unlikely to consume a meaningful am
On Tue, May 22, 2012 at 3:00 AM, aaron morton wrote:
> 1) Isolating the node from the cluster to stop write activity. You can
> either start the node with the -Dcassandra.join_ring=false JVM option or
> use nodetool disablethrift and disablegossip to stop writes. Note that this
> will not stop ex
On Fri, May 18, 2012 at 1:41 PM, Poziombka, Wade L
wrote:
> How does counters affect this? Why would be different?
Oh, actually this is an obsolete caution as of Cassandra 0.8beta1 :
https://issues.apache.org/jira/browse/CASSANDRA-1938
Sorry! :)
=Rob
PS - for historical reference, before this
On Thu, May 17, 2012 at 9:37 AM, Bryan Fernandez wrote:
> What would be the recommended
> approach to migrating a few column families from a six node cluster to a
> three node cluster?
The easiest way (if you are not using counters) is :
1) make sure all filenames of sstables are unique [1]
2) c
On Tue, Apr 24, 2012 at 3:24 PM, Bill Au wrote:
> Everything went smoothly until I ran the last step, which is to run nodetool
> repair on all the nodes in the new data center. Repair is hanging on all
> the new nodes. I had to hit control-C to break out of it.
> [ snip ]
> Did I missed anything
On Tue, Apr 24, 2012 at 12:56 PM, Matthias Pfau wrote:
> we just noticed that cassandra is currently published with inconsistent
> dependencies. The inconsistencies exist between the published pom and the
> published distribution (tar.gz). I compared hashes of the libs of several
> versions and th
On Fri, May 4, 2012 at 10:30 AM, Bill Au wrote:
> I know repair may take a long time to run. I am running repair on a node
> with about 15 GB of data and it is taking more than 24 hours. Is that
> normal? Is there any way to get status of the repair? tpstats does show 2
> active and 2 pending
On Tue, May 1, 2012 at 4:31 AM, Henrik Schröder wrote:
> But what's the difference between doing an extra read from that One Big
> File, than doing an extra read from whatever SSTable happen to be largest in
> the course of automatic minor compaction?
The primary differences, as I understand it,
On Mon, Apr 30, 2012 at 6:48 PM, Jonathan Ellis wrote:
> On Mon, Apr 30, 2012 at 7:49 PM, Cord MacLeod wrote:
>> Hello group,
>>
>> I'm a new Cassandra and Java user so I'm still trying to get my head around
>> a few things. If you've disabled swap on a machine what is the reason to
>> use JNA
On Thu, Apr 26, 2012 at 10:38 PM, Shubham Srivastava
wrote:
> On another thought I could also try copying the data of my keyspace alone
> from one node to another node in the new cluster (I have both the old and new
> clusters having same nodes DC1:6,DC2:6 with same tokens) with the same tokens.
> I copied all the snapshots from each individual nodes where the snapshot
> data size was around 12Gb on each node to a common folder(one folder alone).
>
> Strangely I found duplicate file names in multiple snapshots and
> more strangely the data size was different of each duplicate file which le
On Tue, Apr 10, 2012 at 8:40 AM, ruslan usifov wrote:
> mmap doesn't depend on jna
FWIW, this confusion is as a result of the use of *mlockall*, which is
used to prevent mmapped files from being swapped, which does depend on
JNA.
=Rob
--
=Robert Coli
AIM>ALK - rc...@palominodb.com
YAHOO - rcol
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