Hi,
I recently upgraded from 0.8.x to 1.1.x (through 1.0 briefly) and nodetool
-ring seems to have changed from owns to effectively owns.
Effectively owns seems to account for replication factor (RF). I'm ok
with all of this, yet I still can't figure out what's up with my cluster.
I have a
the range being
considered, not the last node that was chosen as a replica).
To fix this, you'll either need to make the 1d node a 1c node, or make
42535295865117307932921825928971026432 a 1d node so that you're alternating
racks within that DC.
On Thu, Sep 6, 2012 at 12:54 PM, William Oberman
Hi,
I'm trying to figure out what's going on with my cassandra/hadoop/pig
system. I created a mini copy of my main cassandra data by randomly
subsampling to get ~50,000 keys. I was then writing pig scripts but also
the equivalent operation using simple single threaded code to double check
pig.
to undo all of my other hacks to get logging/printing
working to confirm if those were actually the only two changes I had to
make.
will
On Thu, Sep 27, 2012 at 1:43 PM, William Oberman
ober...@civicscience.comwrote:
Ok, this is painful. The first problem I found is in stock 1.1.5
of the integration between
cassandra/pig/hadoop.
will
On Thu, Sep 27, 2012 at 3:26 PM, William Oberman
ober...@civicscience.comwrote:
The next painful lesson for me was figuring out how to get logging working
for a distributed hadoop process. In my test environment, I have a single
node that runs
I'm wondering how many people are using cassandra + pig out there? I
recently went through the effort of validating things at a much higher
level than I previously did(*), and found a few issues:
https://issues.apache.org/jira/browse/CASSANDRA-4748
there are
some rough edges like you say. But issues that are reproducible on tickets
for any problems are much appreciated and they will get addressed.
On Oct 11, 2012, at 10:43 AM, William Oberman ober...@civicscience.com
wrote:
I'm wondering how many people are using cassandra + pig out there? I
paging through them. I
don't recall if we did paging in pig or mapreduce but you should be able to
do that in both since pig allows you to specify the slice start.
On Oct 11, 2012, at 11:28 AM, William Oberman ober...@civicscience.com
wrote:
If you don't mind me asking, how are you handling
A recent thread made it sound like Brisk was no longer a datastax supported
thing (it's DataStax Enterpise, or DSE, now):
http://www.mail-archive.com/user@cassandra.apache.org/msg24921.html
In particular this response:
http://www.mail-archive.com/user@cassandra.apache.org/msg25061.html
On Thu,
There is a great guide here on how to add resources:
http://www.datastax.com/docs/1.1/operations/cluster_management#adding-capacity
What about deleting resources? I'm thinking of removing a data center.
Clearly I'd need to change strategy options, which is currently something
like this:
, if you never wrote data directly to DC2, then you are correct you
don't need to run repair.
You should just need to update the schema, and then decommission the node.
-Jeremiah
On Nov 12, 2012, at 2:25 PM, William Oberman ober...@civicscience.com
wrote:
There is a great guide here on how
that the initial address
isn't set (on the slave, the master is ok).
Can you post the full error ?
Cheers
-
Aaron Morton
Freelance Cassandra Developer
New Zealand
@aaronmorton
http://www.thelastpickle.com
On 4/01/2013, at 11:15 AM, William Oberman ober
way (of setting the 3 system
variables on the pig starter box, and having the config flow into the task
trackers) doesn't work!
will
On Fri, Jan 4, 2013 at 9:04 AM, William Oberman ober...@civicscience.comwrote:
On all tasktrackers, I see:
java.io.IOException: PIG_OUTPUT_INITIAL_ADDRESS
what are you using for cassandra
storage? I am currently using EC2 local disks, but I am looking for an
alternative.
Best regards,
Marcelo.
2013/1/4 William Oberman ober...@civicscience.com
So I've made it work, but I don't get it yet.
I have no idea why my DIY server works when I set
I have a peer EBS disk to the ephemeral disk . Then I do nodetool
snapshot - rsync from ephemeral to EBS - take snapshot of EBS. Syncing
nodetool snapshot directly to S3 would involve less steps and be cheaper
(EBS costs more than S3), but I do post processing on the snapshot for EMR,
and it
I'm running 1.1.6 from the datastax repo.
I ran sstable2json and got the following error:
Exception in thread main java.io.IOError: java.io.IOException: dataSize
of 7020023552240793698 starting at 993981393 would be larger than file
/var/lib/cassandra/data/X-Data.db length 7502161255
files (Compression, Filter...)
On Mon, Jan 21, 2013 at 11:36 AM, William Oberman
ober...@civicscience.com wrote:
I'm running 1.1.6 from the datastax repo.
I ran sstable2json and got the following error:
Exception in thread main java.io.IOError: java.io.IOException: dataSize
I happened to notice some bizarre timestamps coming out of the
cassandra-cli. Example:
[default@XXX] get CF[‘e2b753aa33b13e74e5e803d787b06000'];
= (column=c35ef420-c37a-11e0-ac88-09b2f4397c6a, value=XXX,
timestamp=2013042719)
= (column=c3845ea0-c37a-11e0-8f6f-09b2f4397c6a, value=XXX,
I'll skip the prelude, but I worked myself into a bit of a jam. I'm
recovering now, but I want to double check if I'm thinking about things
correct.
Basically, I was in a state where a majority of my servers wanted to do
compactions, and rather large ones. This was impacting my site
column family
On Mon, Apr 1, 2013 at 12:38 PM, William Oberman
ober...@civicscience.comjavascript:_e({}, 'cvml',
'ober...@civicscience.com');
wrote:
I'll skip the prelude, but I worked myself into a bit of a jam. I'm
recovering now, but I want to double check if I'm thinking about things
it usually means one of these things,
1) you have a corrupt table that the compaction never finishes on,
sstables count keep growing
2) you do not have enough hardware to handle your write load
On Tue, Apr 2, 2013 at 7:50 AM, William Oberman
ober...@civicscience.comwrote:
Thanks Gregg Aaron
99% sure it's in bytes.
On Mon, Apr 15, 2013 at 11:25 AM, William Oberman
ober...@civicscience.comwrote:
Mainly the:
ColumnFamilyMemtable ops,data
section.
Is data in bytes/kb/mb/etc?
Example line:
StatusLogger.java (line 116) civicscience.sessions
a failure mode where the west is
disconnected from the east.
Could you start simple with 3 replicas in one AZ in us-east and 3 replicas
in an AZ+Region ? Then work through some failure scenarios.
Hope that helps.
Aaron
On 22 Apr 2011, at 03:28, William Oberman wrote:
Hi,
My service is not yet
In my test cluster I manged to jam up a cassandra server. I figure the easy
failsafe solution is to just boot a replacement node, but I thought I'd
try a minute to either figure out what I did, or try to figure out how to
properly recover it before I lose my current state.
The symptom = on
-archive.com/user@cassandra.apache.org/msg11414.html
Aaron
On 27 Apr 2011, at 01:18, William Oberman wrote:
Thanks Aaron!
Unless no one on this list uses EC2, there were a few minor troubles end of
last week through the weekend which taught me a lot about obscure failure
modes in various
go with the nuclear
option.
Aaron
On 27 Apr 2011, at 07:11, William Oberman wrote:
In my test cluster I manged to jam up a cassandra server. I figure the
easy failsafe solution is to just boot a replacement node, but I thought
I'd try a minute to either figure out what I did, or try
While I haven't configured it for multi-region yet, Sasha is exactly right
now how amzon's DNS works (returning private vs. public IP depending on if
the machine is local to the region or not). For extra fun, now that Route53
exists you can (somewhat trivially) map and dynamically maintain all
performance is good
enough. There are lots of dials to play with
http://wiki.apache.org/cassandra/MemtableThresholds
Hope that helps.
Aaron
On 27 Apr 2011, at 09:31, William Oberman wrote:
I see what you're saying. I was able to control write latency on mysql
using insert vs insert delayed
:
+ ec2zone + .);
ApplicationState.DC = ec2region
ApplicationState.RACK = ec2zone
We leverage cassandra instances in APAC, US Europe ... so it's
important for us to know that we have one data center in each 'region'
and multiple racks per DC ...
-sasha
On Wed, Apr 27, 2011 at 3:06 PM, William
this could be avoided if cassandra
maintained hostname references and not just IP references for nodes.
-sasha
On Wed, Apr 27, 2011 at 2:56 PM, William Oberman
ober...@civicscience.com wrote:
While I haven't configured it for multi-region yet, Sasha is exactly
right
now how amzon's DNS works
is already
in the works (to route EC2 traffic to the closest region).
will
On Wed, Apr 27, 2011 at 9:33 AM, William Oberman
ober...@civicscience.comwrote:
I don't think of it as migrating an instance, it's more of a destroy/start
with EC2. But, I still think it would be very useful to spin up a set
not a good idea to switch
NetworkTopologyStrategy ...
On Wed, Apr 27, 2011 at 3:29 PM, William Oberman
ober...@civicscience.com wrote:
Thanks Sasha. Fortunately/unfortunately I did realize the default
current
behavior of the Ec2Snitch, but my application isn't multi-region capable
(yet), so I
Even with N-nodes for redundancy, I still want to have backups. I'm an
amazon person, so naturally I'm thinking S3. Reading over the docs, and
messing with nodeutil, it looks like each new snapshot contains the previous
snapshot as a subset (and I've read how cassandra uses hard links to avoid
pointless
anyways.
will
On Thu, Apr 28, 2011 at 3:57 PM, Sasha Dolgy sdo...@gmail.com wrote:
You could take a snapshot to an EBS volume. then, take a snapshot of that
via AWS. of course, this is ok.when they -arent- having outages and issues
...
On Apr 28, 2011 9:54 PM, William Oberman ober
a
json file with the current files in the directory, so you can know what to
restore in that event (as far as I understand).
On Apr 28, 2011, at 2:53 PM, William Oberman wrote:
Even with N-nodes for redundancy, I still want to have backups. I'm an
amazon person, so naturally I'm thinking S3
impacting the main data raid.
But the main reason to do this is to have an 'omg we screwed up big time
and deleted / corrupted data' recovery.
On Apr 28, 2011, at 9:53 PM, William Oberman wrote:
Even with N-nodes for redundancy, I still want to have backups. I'm an
amazon person, so
://wiki.apache.org/cassandra/ArchitectureOverviewAaron
On 29 Apr 2011, at 23:43, William Oberman wrote:
Dumb question, but referenced twice now: which files are the SSTables and
why is backing them up incrementally a win?
Or should I not bother to understand internals, and instead just roll
I decided to try out hadoop/pig + cassandra. I had my ups and downs to get
the script I wanted to run to work. I'm sure everyone who tries will have
their own experiences/problems, but mine were:
-Everything I need to know was in
http://hadoop.apache.org/common/docs/r0.20.2/cluster_setup.html
I think I'm stuck on typing issues trying to store data in cassandra. To
verify, cassandra wants (key, {tuples})
My pig script is fairly brief:
raw = LOAD 'cassandra://test_in/test_cf' USING CassandraStorage() AS
(key:chararray, columns:bag {column:tuple (name, value)});
--colums == timeUUID -
and ToCassandraBag from
pygmalion - it does the work for you to get it back into a form that
cassandra understands.
Others may know better how to massage the data into that form using just
pig, but if all else fails, you could write a udf to do that.
Jeremy
On Jun 15, 2011, at 1:17 PM, William Oberman
I'll do a reply all, to keep this more consistent (sorry!).
Rather than staying stuck, I wrote a custom function: TupleToBagOfTuple. I'm
curious if I could have avoided it with proper pig scripting though.
On Wed, Jun 15, 2011 at 3:08 PM, William Oberman
ober...@civicscience.comwrote:
My
I haven't done it yet, but when I researched how to make
geo-diverse/failover DCs, I figured I'd have to do something like RF=6,
strategy = {DC1=3, DC2=3}, and LOCAL_QUORUM for reads/writes. This gives
you an ack after 2 local nodes do the read/write, but the data eventually
gets distributed to
I woke up this morning to all 4 of 4 of my cassandra instances reporting
they were down in my cluster. I quickly started them all, and everything
seems fine. I'm doing a postmortem now, but it appears they all OOM'd at
roughly the same time, which was not reported in any cassandra log, but I
, William Oberman
ober...@civicscience.com wrote:
I woke up this morning to all 4 of 4 of my cassandra instances reporting
they were down in my cluster. I quickly started them all, and everything
seems fine. I'm doing a postmortem now, but it appears they all OOM'd at
roughly the same time
before it was finally killed because 'apt' was fighting for resource.
At least, that's as far as I got in my investigation before giving up,
moving to 0.8.0 and implementing 24hr nodetool repair on each node via
cronjobso far ... no problems.
On Wed, Jun 22, 2011 at 2:49 PM, William Oberman
is running on the
boxes?
On Wed, Jun 22, 2011 at 9:06 AM, William Oberman ober...@civicscience.com
wrote:
I was wondering/I figured that /var/log/kern indicated the OS was killing
java (versus an internal OOM).
The nodetool repair is interesting. My application never deletes, so I
didn't
I'm running 0.7.4 from rpm (riptano). If I do a yum upgrade, it's trying to
do 0.7.6. To get 0.8.x I have to do install apache-cassandra08. But that
is going to install two copies.
Is there a semi-official way of properly upgrading to 0.8 via rpm?
--
Will Oberman
Civic Science, Inc.
3030
on the version of nodetool
will
On Wed, Jun 22, 2011 at 10:15 AM, William Oberman
ober...@civicscience.comwrote:
I'm running 0.7.4 from rpm (riptano). If I do a yum upgrade, it's trying
to do 0.7.6. To get 0.8.x I have to do install apache-cassandra08. But
that is going to install two
immediately. You
should turn this on when you start adding new nodes to a cluster that
already has data on it.
I'm not adding new nodes, but the cluster does have data on it...
will
On Wed, Jun 22, 2011 at 11:39 AM, William Oberman
ober...@civicscience.comwrote:
I just did a remove then install
wrote:
Doesn't matter. auto_bootstrap only applies to first start ever.
On Wed, Jun 22, 2011 at 10:48 AM, William Oberman
ober...@civicscience.com wrote:
I have a question about auto_bootstrap. When I originally brought up the
cluser, I did:
-seed with auto_boot = false
-1,2,3
I've been doing EBS snapshots for mysql for some time now, and was using a
similar pattern as Josep (XFS with freeze, snap, unfreeze), with the extra
complication that I was actually using 8 EBS's in RAID-0 (and the extra
extra complication that I had to lock the MyISAM tables... glad to be moving
I'll start with my question: given a CF with comparator TimeUUIDType, what
is the most efficient way to get the greatest column's value?
Context: I've been running cassandra for a couple of months now, so
obviously it's time to start layering more on top :-) In my test
environment, I managed to
that is the current metric to use.
Cheers
-
Aaron Morton
Freelance Cassandra Developer
@aaronmorton
http://www.thelastpickle.com
On 30 Jun 2011, at 06:35, William Oberman wrote:
I'll start with my question: given a CF with comparator TimeUUIDType,
what is the most
Ok, I see the you happen to choose the 'right' node idea, but it sounds
like you want to solve C* problems in the client, and they already wrote
that complicated code to make clients simple. You're talking about
reimplementing key-node mappings, network topology (with failures), etc...
Plus, if
Was just going off of: Send the value to the primary replica and send
placeholder values to the other replicas. Sounded like you wanted to write
the value to one, and write the placeholder to N-1 to me. But, C* will
propagate the value to N-1 eventually anyways, 'cause that's just what it
does
you are hacking (or at least looking) at the source, so all the
power to you if/when you try these kind of changes.
will
On Sun, Jul 3, 2011 at 8:45 PM, AJ a...@dude.podzone.net wrote:
**
On 7/3/2011 6:32 PM, William Oberman wrote:
Was just going off of: Send the value to the primary
I have a few cassandra/hadoop/pig questions. I currently have things set up
in a test environment, and for the most part everything works. But, before
I start to roll things out to production, I wanted to check on/confirm some
things.
When I originally set things up, I used:
, Jul 6, 2011 at 2:48 PM, William Oberman
ober...@civicscience.comwrote:
I have a few cassandra/hadoop/pig questions. I currently have things set
up in a test environment, and for the most part everything works. But,
before I start to roll things out to production, I wanted to check
on/confirm
I think I had (and have) a similar problem:
http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/OOM-or-what-settings-to-use-on-AWS-large-td6504060.html
My memory usage grew slowly until I ran out of mem and the OS killed my
process (due to no swap).
I'm still on 0.7.4, but I'm
wrong yet again.
For me, if I need two pieces of data to be consistently related to each
other and stored in cassandra, I encode them (usually JSON) and store them
in one column.
will
On Fri, Jul 8, 2011 at 8:30 AM, William Oberman ober...@civicscience.comwrote:
Questions like this seem to come
in memory, lock the mutex
for A's key as a precursor to (1) and release it in a post-update function.
But I am always very nervous about inserting locking into a process that
wasn't designed with it already in mind...
On Fri, Jul 8, 2011 at 8:30 AM, William Oberman
ober
.
will
On Fri, Jul 8, 2011 at 10:35 AM, William Oberman
ober...@civicscience.comwrote:
I think you need to look into Zookeeper, or other distributed coordinator,
as you have little/no guarantees from cassandra between 1-3 (in terms of the
guarantees you want and need).
And my terminology in my
I use a language specific wrapper around thrift as my client, but yes, I
guess I fundamentally mean thrift == client, and the cassandra server ==
server.
will
On Fri, Jul 8, 2011 at 11:08 AM, Jeffrey Kesselman jef...@gmail.com wrote:
I am confused by what you mean by Cassandra client code. Is
, William Oberman ober...@civicscience.com
wrote:
I use a language specific wrapper around thrift as my client, but yes, I
guess I fundamentally mean thrift == client, and the cassandra server ==
server.
will
On Fri, Jul 8, 2011 at 11:08 AM, Jeffrey Kesselman jef...@gmail.comwrote:
I am
I finally upgraded to 0.7.4 - 0.8.0 (using riptano packages) 2 days ago.
Before, my resident memory (for the java process) would slowly grow without
bound and the OS would kill the process. But, over the last 2 days, I
_think_ it's been stable. I'll let you know in a week :-)
My other stats:
I was hoping to transition my simple cassandra cluster (where each node is a
cassandra + hadoop tasktracker) to a cluster with two virtual datacenters
(vanilla cassandra vs. cassandra + hadoop tasktracker), based on this:
http://wiki.apache.org/cassandra/HadoopSupport#ClusterConfig
The problem
create keyspace civicscience with replication_factor=3 and
strategy_options = [{us-east:3}] and
placement_strategy='org.apache.cassandra.locator.NetworkTopologyStrategy';
FYI the replication_factor property with the NTS is incorrect, the next(?)
revision of 0.8 will raise an error on
I've had some troubles, so I thought I'd pass on my various bug fixes:
-Cass 0.8.4 has troubles with pig/hadoop (you get NPE's when trying to connect
to cassandra in the pig logs). You need this patch:
http://svn.apache.org/viewvc?revision=1158940view=revision
And maybe this:
AM, William Oberman wrote:
I've had some troubles, so I thought I'd pass on my various bug fixes:
-Cass 0.8.4 has troubles with pig/hadoop (you get NPE's when trying to
connect to cassandra in the pig logs). You need this patch:
http://svn.apache.org/viewvc?revision=1158940view=revision
I also have used datastax with great success (same disclaimer).
A specific example:
-I setup a one-on-one call to talk through an issue, in my case a server
reconfiguration. It took 2 days to find a time to meet, though that was my
fault as I believe they could have worked me in within a day. I
I'm considering similar issues right now. The problem with ephemeral
storage is I don't know an easy way to back it up, while on an EBS it's a
simple snapshot API call.
Otherwise, I believe the performance of the ephemeral (certainly in the case
of large or greater, where you can RAID0 multiple
i'm getting at. why would you want to back it up if the
cluster is working properly? backup is silly ; )
On Wed, Mar 9, 2011 at 4:54 PM, William Oberman
ober...@civicscience.comwrote:
I'm considering similar issues right now. The problem with ephemeral
storage is I don't know an easy
point the snapshot to an external filesystem?
will
On Wed, Mar 9, 2011 at 11:31 AM, Sasha Dolgy sdo...@gmail.com wrote:
Could you not nodetool snapshot the data into an mounted ebs/s3 bucket and
satisfy your development requirement?
-sd
On Wed, Mar 9, 2011 at 5:23 PM, William Oberman
ober
to developers
This is what I had in my head
-sd
On Wed, Mar 9, 2011 at 5:39 PM, William Oberman
ober...@civicscience.comwrote:
I thought nodetool snapshot writes the snapshot locally, requiring 2x of
expensive storage allocation 24x7 (vs. cheap storage allocation of a ebs
snapshot
/
In this directory i have: 1299689801925-09032011
-sd
On Wed, Mar 9, 2011 at 5:54 PM, William Oberman
ober...@civicscience.comwrote:
I haven't done backups yet, so I don't know where the data is written. Is
it where the nodetool is run from? Or local to the instance running
cassandra
I think I found a bug in the cassandra PHP client. I'm using phpcassa, but
the bug is in thrift itself, which I think that library phpcassa just
wraps. In any case, I was trying to test on my local machine, which has
limited RAM, so I reduced the JVM heap size. Of course I immediately had an
Nevermind, the header of the file says it's an apache project, so I'll
contact them. Though, if anyone else is running PHP and is worried about
dropped connections thrashing their server, apply this patch :-)
On Wed, Mar 30, 2011 at 3:18 PM, William Oberman
ober...@civicscience.comwrote:
I
with
phpcassa 0.7.a.3, or the phpcassa master branch?
On Wed, Mar 30, 2011 at 2:26 PM, William Oberman ober...@civicscience.com
wrote:
Nevermind, the header of the file says it's an apache project, so I'll
contact them. Though, if anyone else is running PHP and is worried about
dropped connections
master branch.
On Wed, Mar 30, 2011 at 2:28 PM, Tyler Hobbs ty...@datastax.com wrote:
Are you looking at Thrift trunk, the thrift package that ships with
phpcassa 0.7.a.3, or the phpcassa master branch?
On Wed, Mar 30, 2011 at 2:26 PM, William Oberman
ober...@civicscience.com wrote
Hi,
I'm getting closer to commiting to cassandra, and now I'm in system/IT
issues and questions. I'm in the amazon EC2 cloud. I previously used this
forum to discover the best practice for disk layouts (large instance + the
two ephemeral disks in RAID0 for data + root volume for everything
NTS, than first migrating
to NTS (changing strategy is painful).
I can't think of any downsides to using NTS in a single-DC
environment, so that's the safe option.
On Tue, Apr 12, 2011 at 1:15 PM, William Oberman
ober...@civicscience.com wrote:
Hi,
I'm getting closer to commiting
were already using NTS, than first migrating
to NTS (changing strategy is painful).
I can't think of any downsides to using NTS in a single-DC
environment, so that's the safe option.
On Tue, Apr 12, 2011 at 1:15 PM, William Oberman
ober...@civicscience.com wrote:
Hi,
I'm getting closer
I had a similar error today when I tried using LOCAL_QUORUM without having a
properly configured NetworkTopologyStrategy. QUORUM worked fine however.
will
On Tue, Apr 19, 2011 at 8:52 PM, Oleg Tsvinev oleg.tsvi...@gmail.comwrote:
Earlier I've posted the same message to a hector-users list.
NetworkTopologyStrategy. Are you saying
that it works after configuring it?
On Tue, Apr 19, 2011 at 6:04 PM, William Oberman
ober...@civicscience.com wrote:
I had a similar error today when I tried using LOCAL_QUORUM without having a
properly configured NetworkTopologyStrategy. QUORUM worked fine however
in EC2 deployment. I felt silly afterwards, but I couldn't
find official docs on the structure of strategy_options anywhere.
will
On Wed, Apr 13, 2011 at 5:14 PM, William Oberman
ober...@civicscience.comwrote:
One last coda, for other noobs to cassandra like me. If you use
Hi,
My unit tests started failing once I upgraded from a single node cassandra
cluster to a full N node cluster (I'm starting with 4). I had a few
various bugs, mostly due to forgetting to read/write at a quorum level in
places I needed stronger consistency guarantees. But, I kept getting
That was the trick. Thanks!
On Apr 20, 2011, at 6:05 PM, Jonathan Ellis jbel...@gmail.com wrote:
See the comments for describe_schema_versions.
On Wed, Apr 20, 2011 at 4:59 PM, William Oberman
ober...@civicscience.com wrote:
Hi,
My unit tests started failing once I upgraded from a single
Hi,
I'm having some issues. I keep getting:
ERROR [GossipStage:1] 2013-04-28 07:48:48,876 AbstractCassandraDaemon.java
(line 135) Exception in thread Thread[GossipStage:1,5,main]
java.lang.OutOfMemoryError: unable to create new native thread
--
after a day or two of
with that first.
Cheers
-
Aaron Morton
Freelance Cassandra Consultant
New Zealand
@aaronmorton
http://www.thelastpickle.com
On 30/04/2013, at 3:07 AM, William Oberman ober...@civicscience.com
wrote:
Hi,
I'm having some issues. I keep getting:
ERROR [GossipStage
-
Aaron Morton
Freelance Cassandra Consultant
New Zealand
@aaronmorton
http://www.thelastpickle.com
On 1/05/2013, at 2:18 AM, William Oberman ober...@civicscience.com
wrote:
I use phpcassa.
I did a thread dump. 99% of the threads look very similar (I'm using
1.1.9 in terms of matching
.
Cheers
-
Aaron Morton
Freelance Cassandra Consultant
New Zealand
@aaronmorton
http://www.thelastpickle.com
On 1/05/2013, at 2:18 AM, William Oberman ober...@civicscience.com
wrote:
I use phpcassa.
I did a thread dump. 99% of the threads look very similar (I'm
I get this:
Running rpm_check_debug
ERROR with rpm_check_debug vs depsolve:
apache-cassandra11 conflicts with apache-cassandra11-1.1.11-1.noarch
I'm using Centos. Problem with my OS, or problem with the package? (And
how can it conflict with itself??)
will
I've been running cassandra a while, and have used the PHP api and
cassandra-cli, but never gave cqlsh a shot.
I'm not quite getting it. My most simple CF is a dumping ground for
testing things created as:
create column family stats;
I was putting random stats I was computing in it. All keys,
I'm using AWS's EMR (hadoop as a service), and one step copies some data
from EMR - my cassandra cluster. I used to patch EMR with pig 0.11, but
now AWS officially supports 0.11, so I thought I'd give it a try. I was
having issues. The AWS forum on it is here:
Same region, cross zone transfer is $0.01 / GB (see
http://aws.amazon.com/ec2/pricing/, Data Transfer section).
On Wed, Feb 12, 2014 at 3:04 PM, Russell Bradberry rbradbe...@gmail.comwrote:
Cross zone data transfer does not cost any extra money.
LOCAL_QUORUM = QUORUM if all 6 servers are
, William Oberman ober...@civicscience.com
wrote:
Hi,
I have some history with cassandra + hadoop:
1.) Single DC + integrated hadoop = Was ok until I needed steady
performance (the single DC was used in a production environment)
2.) Two DC's + integrated hadoop on 1 of 2 DCs = Was ok until
I'm wondering what will clear tombstoned rows? nodetool cleanup, nodetool
repair, or time (as in just wait)?
I had a CF that was more or less storing session information. After some
time, we decided that one piece of this information was pointless to track
(and was 90%+ of the columns, and in
of it; for me it never worked so I run
nodetool compaction on every node; that does it.
2014-04-11 16:05 GMT+02:00 William Oberman ober...@civicscience.com:
I'm wondering what will clear tombstoned rows? nodetool cleanup, nodetool
repair, or time (as in just wait)?
I had a CF that was more
for consistency to be achieved prior to deletion. If you are
operationally confident that you can achieve consistency via anti-entropy
repairs within a shorter period you can always reduce that 10 day interval.
Mark
On Fri, Apr 11, 2014 at 3:16 PM, William Oberman ober...@civicscience.com
wrote
to the impact to minor compactions).
I'm hesitant to write the offending sentence again :-)
On Fri, Apr 11, 2014 at 10:44 AM, William Oberman
ober...@civicscience.comwrote:
So, if I was impatient and just wanted to make this happen now, I could:
1.) Change GCGraceSeconds of the CF to 0
2.) run
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