Re: Request for Thoughts on Deployments on AWS EC2 vs. ECS

't imagine I ever would. It seems > like the most bespoke and difficult way to run it. > > > > +1 to everything Patrick said. > > > > Jon > > > > On Thu, Jun 12, 2025 at 12:46 PM Patrick McFadin > wrote: > > I feel like I should weigh in here. :) Ru

Re: Request for Thoughts on Deployments on AWS EC2 vs. ECS

I feel like I should weigh in here. :) Running C* on Kubernetes is best coming from Kubernetes and adding C*. It's a mentality thing. "Why can't I log into my nodes??" There is a book exactly for this topic: https://www.oreilly.com/library/view/managing-cloud-native/9781098111380/ At Datastax, we r

Learn Apache Cassandra® 5.0 Data Modeling

Tomorrow, I'm starting another data modeling series that assumes starting with version 5. The last time I did something this comprehensive was for Cassandra 3. Needless to say, there have been a LOT of updates since then. There will be five parts, and each one has its own signup for the live stre

Re: [External]Cassandra 5.0: Any Official Tests Supporting 'Free Performance Gains'

And I would be remiss if I didn't mention this. If you are doing any testing on your own... SHARE! When we say "Your mileage may vary" it's a great contribution to the project to share 1) Your use case 2) How you tested 3) What you found. Blog post. An email to user@. A social media post. It all

Re: [RELEASE] Apache Cassandra Sidecar 0.1.0 released

We happen to have some very informed engineers discussing Sidecar and the many things you can do with it at Cassandra Forward. Come check out the talk and give them a shout-out! https://www.datastax.com/events/cassandra-forward-march-2025 Congrats on the release! On Fri, Mar 7, 2025 at 10:44 AM B

Time to think about the next version of Cassandra

Hey Cassandra users! If you're running Cassandra in production, there are some major changes coming that will significantly change how you operate and develop with it. I’ll be hosting Cassandra Forward 2025 on March 11 and 12 to walk through these changes from the people building them. I ran one o

Re: Seeking Advice on Running Cassandra with Remote Disk

ited > for mitigating the additional overhead of remote storage. > > On Fri, Feb 21, 2025 at 8:25 PM Long Pan wrote: >> >> Thank you all very much, Guo, Patrick and Jon! I will take a close look at >> the resources you are sharing. >> >> On Thu, Feb 20, 2025

Re: Seeking Advice on Running Cassandra with Remote Disk

I'll give you the general guidance around any type of storage you pick. This even applies to local disks but it will directly apply to your question. The key to success with storage and Cassandra is sequential, concurrent IO. Most of the large IO operations are either writing and reading a large f

Re: vector search question - 5.02

Hey Joe, I think you are running into a limitation we found in JVector 1 and the use of HNSW. This is where release timing sucks. Jonathan continued work on JVector after merging the initial version into Cassandra 5 trunk before the code freeze. There was JVector 2 and then 3 which is in the JVect

Netflix Cassandra Meetup videos posted online

Hi everyone, On October 11, a Bay Area Cassandra Meetup was hosted at Netflix. Many thanks to Vinay Chella for leading that effort and to the entire team for making everyone feel welcome. 145 RSVPs, and over 100 showed up. I was not expecting that level of turnout, especially on a Friday night, bu

User Survey results

Hi everyone, Thank you to everyone who took the time to complete the survey. There was ~150 responses which was a little shy of last year's survey but still a good sample. I've compiled the graphs for the questions for you to look over. There is a link to the raw data if anyone would like to embr

Survey closes tomorrow!

The annual Cassandra survey closes tomorrow. Thanks to everyone who has filled out the survey and if that isn't you, don't wait! *https://forms.gle/wFbt7SAzjFJupqef8 *

User Survey - Weekend reminder!

In case you missed it this week, Apache Cassandra User Survey is out and waiting for your input! I have some swag to send a random group, so do it before the survey closes this Thursday. *https://forms.gle/wFbt7SAzjFJupqef8 *

2024 Apache Cassandra User Survey - Need your input.

*Cassandra community!We've just launched our annual Apache Cassandra User Survey and need to hear from you! This isn't just any survey – it's YOUR chance to shape the direction and share your opinions about Cassandra. We've got Cassandra 5 out now, and 5.1 is already underway. The types of question

Re: Cassandra Meetup October 11

That's probably a Vinay question. I don't know if the auditorium at Netflix has that available. On Wed, Oct 2, 2024 at 11:11 AM Andrew Weaver wrote: > Will recordings or live streams be available? > > On Wed, Oct 2, 2024, 11:41 AM Patrick McFadin wrote: > >> Hi e

Cassandra Meetup October 11

eval and Back Pressure -* Vidhya Arvind, Netflix - *Incremental Repair Scheduling on C*, The Future of C* Repair -* Chris Lohfink, Netflix, Jaydeepkumar Chovatia, Uber - *Generative AI with Vector Search in Cassandra 5* - Patrick McFadin, DataStax - *Securely Processing petabytes of

Let's get ready for Cassandra 5!

Hi everyone, If you haven't seen, we are now at 5.0-rc1 which means we are close to GA. Anticipating that movement, I'm going to be getting our official release blog ready and wanted to ask for some help. If you have been testing/using/breaking 5.0 and would like to offer a quote, it adds a lot to

Re: [RELEASE] Apache Cassandra 5.0-rc1 released

Besides bug fixes, the features were frozen as of December. Revs on any feature enhancements will now go to 5.1. There's already a lot of activity on that branch if you look a CHANGES.txt https://github.com/apache/cassandra/blob/trunk/CHANGES.txt On Fri, Jul 19, 2024 at 7:12 AM Joe Obernberger <

Quick poll on content

Hi everyone, Yesterday, I did a live stream on "GenAI for Cassandra Teams" you can see it on YouTube[1]. I love creating content that helps you work through problems or new things. The GenAI thing has been hitting Cassandra teams with requests for new app features and there are a lot of topics I

Re: Cassandra Summit. What a week!

Patrick McFadin wrote: > > > > > > *Hi everyone,It was great seeing everyone who could attend the Cassandra > Summit last week. Thanks to everyone that helped make it successful. > Speakers. Attendees. Sponsors. You all had your role at bringing this back. > For those

Cassandra Summit. What a week!

*Hi everyone,It was great seeing everyone who could attend the Cassandra Summit last week. Thanks to everyone that helped make it successful. Speakers. Attendees. Sponsors. You all had your role at bringing this back. For those who couldn’t attend, every talk was recorded and is now up on the LF Yo

Can't make it to Cassandra Summit but want to see the talks?

Hi everyone, The Linux Foundation will be streaming all of the talks from the Cassandra Summit. Finding the streams is very easy. Go to the conference schedule: https://events.linuxfoundation.org/cassandra-summit/program/schedule/ Each talk has a YouTube link associated with it. The Keynotes and

Re: Introducing the Cassandra Catalyst program!

So excited for this program! It's been a long time coming but wow, what a great way to recognize individuals advocating for Cassandra in their own communities. Let's get out there and start nominating! Patrick On Fri, Dec 1, 2023 at 9:51 AM Melissa Logan wrote: > The Cassandra community is exc

Cassandra Summit: Engage those networks!

Hi everyone, We are a couple of weeks away from Cassandra Summit. People get busy and forget to register or miss that there is even a summit happening. Let's make sure everyone who wants to go gets a chance! - If you are going, get on the social media of your choice and let everyone know you'll

Cassandra Summit: Early registration discount ends tomorrow

Hi everyone, If you've registered for Cassandra Summit, then ignore this email. If not! Time to get moving. The deadline ends tomorrow. Link to register: https://events.linuxfoundation.org/cassandra-summit/register/ Discount code: 23CS20 (Yes you can use it with the early registration price) I

Re: Time to register for the Cassandra Summit 2023!

/travel-funding/ I hope many of you will take advantage of this program and join us in San Jose! Patrick On Thu, Nov 9, 2023 at 7:15 AM Patrick McFadin wrote: > Hi everyone! > > I'm going to keep this short, but it's time to gather the Cassandra > community. December 12-13

Time to register for the Cassandra Summit 2023!

Hi everyone! I'm going to keep this short, but it's time to gather the Cassandra community. December 12-13 in San Jose. Earlybird registration pricing ends November 21 so don't delay. Registration page: https://events.linuxfoundation.org/cassandra-summit/register/ Use my discount code for 20% off

Re: Cassandra stopped responding but still alive

Can you describe the type of environment you are running in? This sure sounds like odd firewall behavior I’ve seen in the past. > On Oct 31, 2023, at 4:56 PM, Ben Klein wrote: > > On October 30, 2023, at approximately 15:38 UTC, Cassandra stopped responding > to TCP pings on port 9042 and to

Cassandra Summit Update!

Hello Cassandra Community, Below you'll find the updated announcement being posted on the Cassandra website. The short version for short attention spans: - Cassandra Summit will be co-located with the AI.Dev conference. One ticket, two conferences. - CFP for an AI track for the Cassandra Summit

Re: Big Data Question

...and a shameless plug for the Cassandra Summit in December. We have a talk from somebody that is doing 70TB per node and will be digging into all the aspects that make that work for them. I hope everyone in this thread is at that talk! I can't wait to hear all the questions. Patrick On Mon, Aug

Raw results from User Survey

Thanks to everyone who participated in this survey. We had a significant enough responses to give this a legitimacy. 220 responses! I wanted to get the raw results out first so everyone can participate with the full picture. I'll work on a blog post to post on the Apache web site after this is do

Re: Who wants a free Cassandra t-shirt?

gt; On Friday, July 21, 2023 at 08:48:27 p.m. EDT, Patrick McFadin < > pmcfa...@gmail.com> wrote: > > > We have about another week left on the user survey I posted last week. The > response has been slow, so it's time to get things in gear. > > I found a box of Ca

Who wants a free Cassandra t-shirt?

We have about another week left on the user survey I posted last week. The response has been slow, so it's time to get things in gear. I found a box of Cassandra t-shirts that will make an excellent thank you for anyone filling out the survey. Once the survey window closes, I'll pick a random grou

Apache Cassandra User Survey

It’s been a long time since I’ve asked the community for feedback in a poll or otherwise. A lot is changing in the data world, and we have an exciting Cassandra release coming up with v5! I would like to ask for five or ten minutes of your time to answer some questions about how you use Cassandra a

Important news about Cassandra Summit

*Hello Cassandra Community,We all see what’s happening in tech right now. Cuts are being made, and budgets are frozen. For Cassandra Summit, this has translated to low sponsorship and registrations. The program committee has been discussing options with the Linux Foundation events team, and the dec

Re: [DISCUSS] Formation of Apache Cassandra Publicity & Marketing Group

The meeting link I included should let you add it to your calendar. If not, let me know. Patrick On Thu, Jan 26, 2023 at 3:49 PM Aaron Ploetz wrote: > We are going to have our first gathering next Wednesday at 8AM PT > > > I'd like to help out, too, if you wouldn't mind forwarding that meeting

Re: [DISCUSS] Formation of Apache Cassandra Publicity & Marketing Group

subscribe from. > > If you are a committer you can alternately use Whimsy: > https://whimsy.apache.org/committers/subscribe > > regards, > Mick > > > On Fri, 20 Jan 2023 at 00:31, Patrick McFadin wrote: > > > > > > > > > > > > > >

Cassandra Summit update for 2023-01-24

*Hello Cassandra Community!Quick take: - Register before 1/28 to get discount pricing. https://events.linuxfoundation.org/cassandra-summit/register/ - Use code CS23DS20 to get 20% off - Make sure and sign up for training the day on Mar

[DISCUSS] Formation of Apache Cassandra Publicity & Marketing Group

*Hello Cassandra Community!We are at a pivotal moment for the Cassandra community, with the first Cassandra Summit in 7 years coming up on March 13th, and a major release coming later this year with Cassandra 5.0. It is important that we come together to set the publicity strategy and direction for

Re: Cassandra nightly process

My general advice for any time you see hints accumulating, consider that smoke for the more pressing fire happening somewhere else. You correctly identified the right path to consider, which is some sort of scheduled activity. Cassandra doesn't have any scheduled internal jobs. Compactions happen a

Re: Cassandra Summit CFP update

g> wrote: > Does it need to be strictly Apache Cassandra? Or is something built > on/working with DataStax Enterprise allowed? I would think if it doesn’t > depend on DSE-only technology, it could still apply to a general Cassandra > audience. > > > > > > Sean

Cassandra Summit CFP update

g on a submission. Thank you for being willing to create a talk! How can I help you get it completed? Again, here is my Calendly link if you need to talk it over: https://calendly.com/patrick-mcfadin/15-minute-cassandra-summit-cfp-consult <https://calendly.com/patrick-mcfadin/15-minute-cassandra-s

Speak at the Cassandra Summit

Sharing about Best Practices And finally, I want to make sure you feel supported for any challenges you may have. I have set up a unique Calendly link if you want a quick consultation. You can choose Google Meet or Zoom and find a time that works for you. https://calendly.com/patrick-mcfadin/15

Re: The return of Cassandra Summit in 2023

I know a lot of people are excited to see the return of Cassandra Summit and I'm one of them! This has always been a gathering of not only people that use and love Cassandra but people that push the edge of scale and data. I hope to see a lot more of that in 2023. This summit is being run by the L

Do you know about DBA Stack Exchange?

Hi everyone, I wanted to make sure you know about a great community resource. DBA Stack Exchange is a related site to Stack Overflow but strictly for DB operations people. There is a dedicated tag for Cassandra operations: https://dba.stackexchange.com/questions/tagged/cassandra I'm mentioning th

Re: Cassandra GC tuning

Amy's Guide. Still getting it done after all these years. Legendary. On Tue, Sep 20, 2022 at 6:05 AM Jeff Jirsa wrote: > Beyond this there are two decent tuning sets, but relatively dated at this > point > > Cassandra-8150 proposed a number of changes to defaults based on how it > had been tuned

Re: Cassandra GC tuning

GC tuning may seem like it's the best move, but more than likely, that is just the smoke from the real fire. Can you go more into your configuration? Memory. CPU. DIsk. Many times, GC is what shows up when running out of disk bandwidth or some other process eating up resources. Patrick On Mon, Se

Re: The "Cassandra Corner" podcast

Things I have learned about the Cassandra Community... You all love some RSS! On Wed, Jun 1, 2022 at 12:18 PM Aaron Ploetz wrote: > Maxn, > > Ah! That's because I had to explicitly enable RSS in the settings. Doh! > > Give that URL another shot and let me know if it doesn't work. > > Thanks,

Re: Apache Cassandra Marketing Meeting - 5/26

For sure, and I'm glad you brought this up. We have done two contributor meetings previously, so I would be happy to alternate into different time zones. I'll work on getting that set up. Patrick On Tue, May 24, 2022 at 7:21 PM guo Maxwell wrote: > Make a suggestion, can you consider Asian user

Apache Cassandra Marketing Meeting - 5/26

Hi everyone, It's been almost a month since our last meeting, and a lot is happening. 4.1 is moving along. Cassandra World Party is ready to celebrate this release, and promotions have started. We had a great turnout at the last meeting with good participation. Everyone is invited to participate.

Re: Cassandra World Party in July; CFP open!

I'm really looking forward to this event. Last year was great and had the same casual fun as a meetup. With the addition of some in-person meetups this will be a great time to get out and meet some of your fellow Cassandra community members. An important footnote. This event is meant to coincide w

Apache Cassandra Marketing Meeting

Hi everyone, There are several community members working on various marketing efforts to get out the good word on Cassandra. I've been asked by a few to help facilitate a meeting where we can share and coordinate. I've taken the first step by creating a calendar item with a zoom link. When: May

[no subject]

Hello Cassandra Community! Data on Kubernetes day will be on Monday, May 16th. This is a virtual and in-person event in Valencia Spain the day before KubeCon EU. The CFP closes tomorrow and I'm here to rally the Cassandra community to show off some of the great things you are doing with Cassandra

Re: Cassandra Management tools?

Hi all. Just a plug for a great community resource that would love some updated new tools. Also a good resource for old ones as well. https://github.com/Anant/awesome-cassandra Thanks! Patrick On Tue, Mar 8, 2022 at 8:43 AM wrote: > I use an Ansible Collection for Cassandra - > https://galaxy

Hands-on 4.0 training

Hi everyone, The education team at DataStax has just released some hands-on training on new features to 4.0. This is using Katakoda platform which if you haven't used, creates a small runtime environment you can access through a browser. The team has set up walkthrough scenarios for - Introducti

Re: High mutation stage in multi dc deployment

Hi Ashish, Can you give us some information about some of the details? Specifically some indication on the version of Cassandra, data model, consistency levels used, and how you are bulk loading. Is this a batch by any chance? Patrick On Mon, Jul 19, 2021 at 10:38 AM MyWorld wrote: > Hi all, >

Re: [RELEASE] Apache Cassandra 4.0-rc2 released

Abdul Patel wrote: > Great news!! > Is this production ready? > > On Wed, Jun 30, 2021, 3:56 PM Patrick McFadin wrote: > >> Congrats to everyone that worked on this iteration. If you haven't looked >> at the CHANGES.txt there were some great catches in RC1. Just like i

Re: [RELEASE] Apache Cassandra 4.0-rc2 released

Congrats to everyone that worked on this iteration. If you haven't looked at the CHANGES.txt there were some great catches in RC1. Just like it should happen! On Wed, Jun 30, 2021 at 12:29 PM Mick Semb Wever wrote: > > The Cassandra team is pleased to announce the release of Apache Cassandra > v

Re: [RELEASE] Apache Cassandra 4.0-rc1 released

This is pretty exciting and a huge milestone for the project. Congratulations to all the contributors who worked hard at making this the release it needed to be and honoring the database that powers the world. Patrick On Sun, Apr 25, 2021 at 4:10 AM Mick Semb Wever wrote: > The Cassandra team i

Re: Cassandra video tutorials for administrators.

Hi Justine, Welcome to the community! There is quite an extensive playlist here from an older DataStax Academy course on Cassandra admin: https://www.youtube.com/playlist?list=PL2g2h-wyI4SrHMlHBJVe_or_Ryek2THgQ An exact daily task list type video I haven't seen. In my experience the fundamental t

2021 Cassandra Kubernetes SIG

Hi everyone, As 2021 is getting started, I've been cleaning up our wiki on the Cassandra Kubernetes SIG. The last few SIG meetings have been mostly about the ongoing merge efforts on the Cassandra Kubernetes Operator but have started shifting to the topic of actually running Cassandra on Kubernete

Re: Connect java application to Cassandra in Kubernetes

Pushpendra, I would recommend using an Ingress service like Envoy or Kong to manage your communication. You get other things besides network connection management such as security through mTLS. I wrote a short blog about this which will be going up on New Stack hopefully soon. Chris Bradford also

ApacheCon 2020

Thanks for your support of our fast growing community, Patrick McFadin

Re: slurm for cluster job scheduling and coordination

Carl, Slurm might be a nice way to keep things you already have built in some sort of control plane. Things already built meaning terraform, ansible, salt, chef, wrote: > Between repairs, rolling restarts, scheduled maintenance bounces, backups, > upgrades, etc there are lots of cluster-wide tas

Re: How to read content of hints file and apply them manually?

sen > wrote: > >> I am in agreement with Patrick, this is a typical symptom of saturated >> IO. Are there a high of drops and/or pending compactions? >> >> Get Outlook for Android <https://aka.ms/ghei36> >> ------ >> *From:* Patri

Re: How to read content of hints file and apply them manually?

Just to add in here. Any time I see any hints on a cluster, that's like seeing smoke. If you can't explain it, you have a fire somewhere and it's not going to get any better. By the few messages I've seen, I would start by looking at your IO subsystem on your nodes. Do you have enough throughput t

Re: Datafile Corruption

If you hadn't mentioned the fact you are using physical disk I would have guessed you were using virtual disks on a SAN. I've seen this sort of thing happen a lot there. Are there any virtual layers between the cassandra process and the hardware? Just a reminder, fsync can be a liar and the virtual

Upcoming events for Cassandra community

*Hey everyone,I just wanted to let you know about some upcoming learning events that may interest the Cassandra community. These are physical events, so places where you can get some hands-on training, hear what others are doing or meet with other people in the community. These are the ones I’m per

DataStax Accelerate call for papers closing February 15

*Hello my fellow Cassandra people!I’m not sure if you’ve heard, but DataStax is hosting a conference this year, DataStax Accelerate. I’m in charge of the speaker part of the conference, so I’m here to ask for some help. I want a ton of awesome Cassandra content! The best part of our community is wh

Re: which driver to use with cassandra 3

Vitaliy, The DataStax Java driver is very actively maintained by a good size team and a lot of great community contributors. It's version 3.x compatible and even has some 4.x features starting to creep in. Support for virtual tables (https://issues.apache.org/jira/browse/CASSANDRA-7622) was just

Re: Cassandra Summit 2019 / Cassandra Summit 2018

Sorry Ben. Instaclustr. My spell checker keeps buying vowels. On Thu, May 10, 2018 at 10:43 AM, Patrick McFadin wrote: > +1 to what Ben said. Lynn Bender has a great reputation for building > vendor-neutral events and this is shaping up to be a really good one for > the Cassandra commu

Re: Cassandra Summit 2019 / Cassandra Summit 2018

+1 to what Ben said. Lynn Bender has a great reputation for building vendor-neutral events and this is shaping up to be a really good one for the Cassandra community. I'm devoting a lot of DataStax resources to it and I know Ben is doing the same at Instacluster. Now that being said. If you want a

Answering the question of Cassandra Summit 2017

Hello Cassandra Community, I know this is a hot topic so let me TL;DR for those of you looking for the short answer. Will there be a Cassandra Summit in 2017? DataStax will not be holding a Cassandra Summit in 2017, but instead multiple DataStax Summits in 2018. More details. Last year was pretty

Re: Truncate data from a single node

Hey Kevin, I would worry that much about a truncate operation. It can quietly destroy all your data very efficiently. One thing you should know is that a snapshot is automatically created when you issue a truncate. Yes. An undelete if you screw up. Just don't be surprised when you find it. Deleti

Re: Bottleneck for small inserts?

When you are running a stress test, 1-1 match client to server won't saturate a cluster. I would go closer to 3-5 clients per server, so 10-15 clients against your 3 node cluster. Patrick On Tue, May 23, 2017 at 4:18 PM, Jeff Jirsa wrote: > > Are the 3 sending clients maxed out? > Are you seein

Re: Change the IP of a live node

It also looks like you changed your topology by altering rack from r1 to RAC1. Shouldn't effect this issue but something to get consistent. On Thu, Mar 16, 2017 at 4:49 AM, George Sigletos wrote: > This was a network problem at our side after all which we fixed. Cassandra > was blocking connecti

Re: cassandra schema initialization in docker

2016 at 2:49 PM, Vova Shelgunov wrote: > Thank you. Maybe it does make sense to put these sstables inside docker > image, what will I lose in this case? > > On Sep 2, 2016 12:28 AM, "Patrick McFadin" wrote: > >> You can create a custom endpoint script that you wi

Re: cassandra schema initialization in docker

You can create a custom endpoint script that you will need to add with a docker build. In that script you'll have to do do a wait loop for when c* is up and running. Being a little more creative, you could pre-bake some sstables and then use docker volumes to mount /data on a local file system. As

Re: Read timeouts on primary key queries

PM, Joseph Tech >> wrote: >> >>> Hi Patrick, >>> >>> The nodetool status shows all nodes up and normal now. From OpsCenter >>> "Event Log" , there are some nodes reported as being down/up etc. during >>> the timeframe of timeout,

Re: Read timeouts on primary key queries

You aren't achieving quorum on your reads as the error is explains. That means you either have some nodes down or your topology is not matching up. The fact you are using LOCAL_QUORUM might point to a datacenter mis-match on node count + RF. What does your nodetool status look like? Patrick On M

Re: Flush activity and dropped messages

and thanks for your reply, > > We are monitoring disk usage and more and we don't seem to be running out > of space at the moment. We have separate partitions/disks for > commitlog/data. Which one do you suspect and why? > > Regards, > Vasilis > > On 25 Aug 2016 4:0

Re: Flush activity and dropped messages

This looks like you've run out of disk. What are your hardware specs? Patrick On Thursday, August 25, 2016, Benedict Elliott Smith wrote: > You should update from 2.0 to avoid this behaviour, is the simple answer. > You are correct that when the commit log gets full the memtables are > flushed

Re: CPU high load

Might be more clear looking at nodetool tpstats >From there you can see all the thread pools and if there are any blocks. Could be something subtle like network. On Tue, Jul 12, 2016 at 3:23 PM, Aoi Kadoya wrote: > Hi, > > I am running 6 nodes vnode cluster with DSE 4.8.1, and since few weeks >

Re: cqlsh problem

Can you do a netstat -lepunt and show the output? If Cassandra is running you aren't trying to connect to the ip/port it's bound to. Patrick On Monday, May 23, 2016, joseph gao wrote: > I used to think it's firewall/network issues too. So I make ufw to be > inactive. I really don't what's the r

Re: A few misbehaving nodes

Can you show the output of a tpstats on one of the effected nodes? That will give some indication where the trouble might be. Patrick On Tue, Apr 19, 2016 at 6:54 AM, sai krishnam raju potturi < pskraj...@gmail.com> wrote: > hi; >do we see any hung process like Repairs on those 3 nodes? wha

Re: Security labels

Cassandra has support for authentication security, but I'm not familiar with a security label. Can you describe what you want to do? Patrick On Thu, Jan 28, 2016 at 2:26 PM, oleg yusim wrote: > Greetings, > > Does Cassandra support security label concept? If so, where can I read on > how it sho

Re: Hadoop + Yarn / DataStax driver issues

That's a pretty basic error from the driver. I would look at the target node and make sure that the IP/port combination is actually bound and free of any firewall shenanigans. Patrick On Mon, Nov 23, 2015 at 4:00 PM, Cyril Scetbon wrote: > Let me also add that I use Cassandra 2.1.11 with Hadoop

Re: Understanding Cassandra Architecture

Thouraya, Assuming that you have started all 4 nodes in step 1, then your cluster is setup and running. Gossip just relays state about the cluster members, not much else. The seed node isn't special in any way, it's just the node you have designated the other nodes to contact if they need to get

Re: DataStax Enterprise Amazon AMI Launch Error

What size of instance are you using? It looks like you aren't at to get resources set up in time. On Thursday, March 12, 2015, Vanessa Gligor wrote: > When I try to launch an EC2 Instance using DataStax community it's > working, so I have the premission to create an EC2 instance. I want to have

Re: how to clear data from disk

Or just manually delete the files. The directories are broken down by keyspace and table. Patrick On Mon, Mar 9, 2015 at 7:50 PM, 曹志富 wrote: > nodetool clearsnapshot > > -- > Ranger Tsao > > 2015-03-10 10:47 GMT+08:00 鄢来琼 : > >> Hi ALL, >> >> >> >> After dro

Re: timeout when using secondary index

Jimmy, The secondary index is getting scanned since you put the column in your query. The behavior you are looking for is a coming feature called Global Indexes slated for 3.0. https://issues.apache.org/jira/browse/CASSANDRA-6477 In the meantime, you could build your own lookup table even with th

Re: OOM and high SSTables count

What kind of disks are you running here? Are you getting a lot of GC before the OOM? Patrick On Wed, Mar 4, 2015 at 9:26 AM, Jan wrote: > HI Roni; > > You mentioned: > DC1 servers have 32GB of RAM and 10GB of HEAP. DC2 machines have 16GB of > RAM and 5GB HEAP. > > Best practices would be be to: