Hi All,
I have shared my experience of tombstone clearing in this blog post.
Sharing it in this forum for wider distribution.
https://medium.com/cassandra-tombstones-clearing-use-case/the-curios-case-of-tombstones-d897f681a378
Thanks,
Charu
Looks like there are a couple of issues open regarding 3.11.2 release:
https://issues.apache.org/jira/browse/CASSANDRA-14355
https://issues.apache.org/jira/browse/CASSANDRA-14495
Ma
On Thu, Aug 23, 2018 at 10:54 PM Mun Dega wrote:
> Interesting. Any other suggestions what other things change
Interesting. Any other suggestions what other things changed that would be
major between 2.1 and 3.x?
In Change Log all isee is bug fixes and further improvements.
On Thu, Aug 23, 2018, 21:37 Gosar M wrote:
> we also increased the max_heap_count (sysctl.conf) value to resolve OOO
> memory is
you may go OS level to delete the files.That's what I did before. Truncate
action is frequently failed on some remote nodes in a heavy transactions
env.
Thanks,
James
On Thu, Aug 23, 2018 at 8:54 PM, Rahul Singh
wrote:
> David ,
>
> What CL do you set when running this command?
>
> Rahul Sing
we also increased the max_heap_count (sysctl.conf) value to resolve OOO memory
issue.
On Thursday, 23 August 2018, 16:04:20 GMT-7, Mun Dega
wrote:
120G data28G heap out of 48 on system9 node cluster, RF3
On Thu, Aug 23, 2018, 17:19 Mohamadreza Rostami
wrote:
Hi,How much data do you
Which documentation are you referring to? Which version of Cassandra?
https://docs.datastax.com/en/cql/3.3/cql/cql_reference/cqlAlterTable.html
Renaming a column
The main purpose of RENAME is to change the names of CQL-generated primary key
and column names that are missing from a legacy table.
What’s your goal? Just output the results and save as JSON?
There may be a better way to do what you want.
https://github.com/tenmax/cqlkit/blob/master/README.md
Rahul Singh
Chief Executive Officer
m 202.905.2818
Anant Corporation
1010 Wisconsin Ave NW, Suite 250
Washington, D.C. 20007
We bu
David ,
What CL do you set when running this command?
Rahul Singh
Chief Executive Officer
m 202.905.2818
Anant Corporation
1010 Wisconsin Ave NW, Suite 250
Washington, D.C. 20007
We build and manage digital business technology platforms.
On Aug 14, 2018, 11:49 AM -0500, David Payne , wrote:
> S
Agreed. If your data model is good and no major read latencies due to little or
no data skew, wide partitions, or tombstones, you can literally scale linearly.
You could also consider having a plan in which you ramp up as the traffic
increases.
Rahul Singh
Chief Executive Officer
m 202.905.2818
120G data
28G heap out of 48 on system
9 node cluster, RF3
On Thu, Aug 23, 2018, 17:19 Mohamadreza Rostami <
mohamadrezarosta...@gmail.com> wrote:
> Hi,
> How much data do you have? How much RAM do your servers have? How much do
> you have a heep?
> On Thu, Aug 23, 2018 at 10:14 PM Mun Dega wro
Agreed. One of the ideas I had on partition size is to automatically
synthetically shard based on some basic patterns seen in the data.
It could be implemented as a tool that would create a new table with an
additional part of the key that is an automatic created shard, or it would use
an exist
Hi,
How much data do you have? How much RAM do your servers have? How much do
you have a heep?
On Thu, Aug 23, 2018 at 10:14 PM Mun Dega wrote:
> Hello,
>
> We recently upgraded from Cassandra 2.1 to 3.11.2 on one cluster. The
> process went OK including upgradesstable but we started to experien
Hello,
We recently upgraded from Cassandra 2.1 to 3.11.2 on one cluster. The
process went OK including upgradesstable but we started to experience high
latency for r/w, occasional OOM and long GC pause after.
For the same cluster with 2.1, we didn't have any issues like this. We
also kept serve
Hello,
I am currently running a 3.11.2 cluster in SimpleSnitch hence the
datacenter is datacenter1 and rack is rack1 for all nodes on AWS. I want to
switch to GPFS by changing the rack name to the availability-zone name and
datacenter name to region name.
When I try to restart individual nodes by
As I used to tell some people, the day we make :
1. partition size unlimited, or at least huge partition easily manageable
(compaction, repair, streaming, partition index file)
2. tombstone a non-issue
that day, Cassandra will dominate any other IoT technology out there
Until then ...
On Thu, A
Good analysis of how the different key structures affect use cases and
performance. I think you could extend this article with potential evaluation of
FiloDB which specifically tries to solve the OLAP issue with arbitrary queries.
Another option is leveraging Elassandra (index in Elasticsearch c
Hi,
I believe the "tDate" is stored with milliseconds precision which could explain
why these duplicate dates are shown.
Could you try running the following query:
"SELECT userid, secondaryid, blobAsBigint(timestampAsBlob("tDate")), tid3,
sid4, pid5, associate_degree FROM user_data;"
The "tDat
Hi,
we wrote a blog about some of the results that engineers from AN10 shared
earlier.
I am sharing it here for greater comments and discussions.
http://www.an10.io/technology/cassandra-and-iot-queries-are-they-a-good-match/
Thank you.
- Affan
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