You will only have tombstones in your data if you issue deletes.
What you are seeing is an artifact of the fundamental way Cassandra stores
data. Once data is written to disk it is never modified. If you overwrite a
column value that has already been committed to disk the old value is not
chang
I'am using Cassandra 0.7.7 and have a question about hinted handoff.
I have a cluster of three nodes.
I stop node 3.
I see that the hint count for node 3 increases on node 1 (countPendingHints =
28709).
However, when I start node 3 again, I cannot see anything in the log regarding
hinted handoff
Check that node 1 sees node 3 as UP (via ring).
Check the tpstats on node 1, is there an active HH task ?
Take another crawl through the logs.
Cheers
-
Aaron Morton
Freelance Cassandra Developer
@aaronmorton
http://www.thelastpickle.com
On 6/10/2011, at 10:35 PM, Rene Kochen
Node 3 is up (using ring on node 1).
There is no HH task (active = 0, pending = 0, completed = 0, blocked = 0).
This is the log from node 1 when nodes 3 starts:
2011-10-06 12:36:54,985 INFO 12:36:54,985 Node /172.16.108.19 has restarted,
now UP again
2011-10-06 12:36:54,985DEBUG 12:36:54,985 No
Hi guys,
We're currently testing an application against a very high load, which
runs against Cassandra 0.6.13 (I know, we just never got the time to
upgrade).
The nature of our app is that it will write to two different
SuperColumnFamilies in bursts, and to some other columnfamilies less
frequent
On Thu, Oct 6, 2011 at 10:09 AM, Stefan Reek wrote:
> I can see that during the times the writing gets slow there are ~3000
> pending tasks, but they disappear quickly.
Your best bet is to make the write load more constant and less bursty.
If you really do need to handle bursts like that with lo
On 10/06/2011 05:26 PM, Jonathan Ellis wrote:
On Thu, Oct 6, 2011 at 10:09 AM, Stefan Reek wrote:
I can see that during the times the writing gets slow there are ~3000
pending tasks, but they disappear quickly.
Your best bet is to make the write load more constant and less bursty.
On Thu, Oct 6, 2011 at 10:53 AM, Stefan Reek wrote:
> We do have the commitlogs on separate devices, are there any other basics
> that I could have forgotten, or
> any parameters that are important for write performance?
1.0 write performance is something like 30% better... I don't think
there's
Lets assume I perform frequent insert & update on a column family..
Over a period of time multiple sstables will have this row/column
data.
I have 2 questions about how reads work in cassandra w.r.t. multiple SS tables.
-If you perform a query for a specific row key and a column name, does
it read
I was hoping someone could share their opinions on the following CF designs or
suggest a better way of doing it.
My app is constantly receiving new data that contains URLs. I was
thinking of hashing this URL to form a key. The data is a JSON object with
several properties. For now many of its pr
I've got the 1.0 rc2 binaries, but it looks like somebody forgot to include the
Apache Daemon in the zip. According to the batch file there should be a
bin\daemon directory, with a prunsrv executable in there.
Cheers,
Steve
It looks like it's missing from the binary distribution. If you download the
source distribution it will be present. I'll see if I can get it included in
the source build.
Ben
On Thu, Oct 6, 2011 at 2:07 PM, Stephen Pope wrote:
> I’ve got the 1.0 rc2 binaries, but it looks like somebody forgot
At debug level you should see some log messages such as…
"Checking remote schema before delivering hints…"
"Sleeping {}ms to stagger hint delivery…"
"Endpoint {} died before hint delivery, aborting…"
"Started hinted handoff for endpoint…"
If you want to move on, you can deliver the hints using JM
> -If you perform a query for a specific row key and a column name, does
> it read the most recent SSTable first and if it finds a hit, does it
> stop there or does it need to read through all the SStables (to find
> most recent one) regardless of whether if found a hit on the most
> recent SSTable
On Thu, Oct 6, 2011 at 3:56 PM, aaron morton wrote:
> -If you perform a query for a specific row key and a column name, does
> it read the most recent SSTable first and if it finds a hit, does it
> stop there or does it need to read through all the SStables (to find
> most recent one) regardless o
does the Solandra specific partitioner distribute data relatively equally
across nodes? Is this influenced by the shards.at.once property? If I'm writing
to 3 nodes, how would the default setting of 4 for this property affect the
distribution of data across my nodes?
From: Jake Luciani mailt
Hi, I wanted to let you all know that Hector client has a website.
http://hector-client.org
There are links to documentation, Javadoc and resources from the community.
If you have a personal blog and want us to include the link, let us know.
Feedback is always welcome.
Thanks!
Hector Team.
Hi,
I want to transfer data from a ring which is on 0.7.4 to the separate ring
running on 0.8. This ring does not even have schema definition of the data
available on 0.7.4. What is the best way to copy data and schema from 0.7
cluster to 0.8. Do I need to define schema manually and then copy ssT
Copy the schema ("show schema" from the cli), then copy the sstables
using the bulk loader (http://www.datastax.com/dev/blog/bulk-loading).
You might have to migrate the schema manually (copy the Schema and
Migration system column families) if show schema doesn't work against
a 0.7 Cassandra.
On
The partitioner that comes with Solandra keeps groups of documents together
on the same node. The number of documents that stick together and define a
"shard" is set by the solandra.maximum.docs.per.shard property.
The shards.at.once property relates to throughput. If you are indexing to
one shar
I'm seeing this error when trying to insert data into a core I've defined in
Solandra
INFO [pool-7-thread-319] 2011-10-06 16:21:34,328 HttpMethodDirector.java (line
445) Retrying request
INFO [pool-7-thread-1070] 2011-10-06 16:21:34,328 HttpMethodDirector.java (line
445) Retrying request
INFO [
I'm seeing this in my logs:
WARN [1832199239@qtp-673795938-0] 2011-10-06 16:15:46,424
CassandraIndexManager.java (line 364) invalid shard name encountered:
WDPRO-NGELOG-DEV 1
WDPRO-NGELOG-DEV is the name of the index I'm creating. Is there a restriction
on characters in the name?
very good job!
2011/10/7 Patricio Echagüe
> Hi, I wanted to let you all know that Hector client has a website.
>
> http://hector-client.org
>
> There are links to documentation, Javadoc and resources from the community.
>
> If you have a personal blog and want us to include the link, let us know
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