2020 ASF Community Survey: Users

Hello everyone, If you have an apache.org email, you should have received an email with an invitation to take the 2020 ASF Community Survey. Please take 15 minutes to complete it. If you do not have an apache.org email address or you didn’t receive a link, please follow this link to the survey: h

Re: AWS ephemeral instances + backup

If you can handle the slower IO of S3 this can work, but you will have a window of out of date images. YOu don't have a concept of persistent snapshots. <==> Life lived is not about the size of the dog in the fight: It is about the size of the fight in the dog. *Daemeon Reiydelle* *email: da

Re: AWS ephemeral instances + backup

You can easily do this with bcache or LVM http://rustyrazorblade.com/post/2018/2018-04-24-intro-to-lvm/. Medusa might be a good route to go down if you want to do backups instead: https://thelastpickle.com/blog/2019/11/05/cassandra-medusa-backup-tool-is-open-source.html On Thu, Dec 5, 2019 at 1

Re: AWS ephemeral instances + backup

We have some tooling that does that kind of thing using S3 rather than attached EBS but a similar principle. There is a bit of an overview here: https://www.instaclustr.com/advanced-node-replace/ It's become a pretty core part of our ops toolbox since we introduced it. Cheers Ben --- *Ben Sla

Re: AWS ephemeral instances + backup

No experience doing it that way personally, but I'm curious: Are you backing up in case of ephemeral instance dying, or backing up in case of data problems / errors / etc? On instance dying, you're probably fine with just straight normal replacements, not restoring from backup. For the rest, is it

AWS ephemeral instances + backup

Does anyone have experience tooling written to support this strategy: Use case: run cassandra on i3 instances on ephemerals but synchronize the sstables and commitlog files to the cheapest EBS volume type (those have bad IOPS but decent enough throughput) On node replace, the startup script for t

Re: No progress in compactionstats

Hi, Check nodetool tpstats output. *---* *VafaTech : A Total Solution for Data Gathering & Analysis* *---* On Mon, Dec 2, 2019 at 10:56 AM Dipan Shah wrote: > Hello,

Repair Strategies

Hi, We are in the process of designing a new solution around cassandra. As repairs are very critical tasks for cassandra clusters want some pointers on the following: 1. What are the recommended strategies for repairs for production cluster (>100 nodes) 2. Is there any special considerat